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Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding

Model20.2×12.6×3.5mm / 289TCategoryAir Core Coil

This is a flat air core inductor coil: a hollow rectangular winding of 289 turns, wound with 0.16 mm enameled copper wire in tight layers, with the two ends stripped and tinned. There is no core in the window, so the inductance comes from the winding

Item: Statement
Product type: Flat air core inductor coil
Core: None

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Phone:+86 13554723725

Email:rhea@zxycoil.com

Description

1. Product Name

A flat air core inductor coil, wound as a hollow rectangle. 289 turns of 0.16 mm high-purity enameled copper wire are laid in tight layers to build a flat winding 3.5 mm thick, and the two ends are stripped and tinned for soldering. The envelope is 20.2 mm by 12.6 mm, the window is 15.6 mm by 7.36 mm, and the leads are 20 mm long. Size, winding and wire configuration are made to order.

Side view: the winding is a flat stack of layers, hollow through the window

What the numbers mean here. On a cored part the core sets the inductance and the winding trims it. This winding has nothing in the window, so the inductance is set by the geometry: the outer and inner dimensions, the turn count and the wire diameter quoted on this page are the electrical specification, not just a mechanical one. If a specific inductance is required, it has to be asked for against a frequency, because the supplied material does not state one.

2. Construction & Materials

The winding. 0.16 mm enameled copper, 289 turns, tight layer winding. The layers are stacked flat rather than piled into a round bundle, which is what produces a 3.5 mm thickness against a 20.2 mm length. A tape band holds the winding at the point where the leads leave, and the lead ends are stripped and tinned so they can be soldered without preparation.

Callouts on the winding: 0.16 mm enameled copper, 289 tight layer turns, stripped and tinned ends

The profile. Seen edge-on the part is a stack of winding layers, not a body with a lid: there is no case, no bobbin flange and no potting. That is the point of the format where height is the constraint, and it is also why the thickness tolerance is given as 0.5 mm rather than as a machined dimension.

Edge-on: the 3.5 mm thickness is the stack of winding layers, not a body

The dimensions. Every dimension on this part is quoted with a tolerance, which is unusual enough to be worth reading carefully: outer length 20.2 mm and outer width 12.6 mm to within 1 mm, thickness 3.5 mm to within 0.5 mm, window 15.6 mm by 7.36 mm to within 0.5 mm, and leads 20 mm to within 2 mm. A coil is a wound part, so the winding itself moves; the tolerances are what the supplier is prepared to hold.

Outline as dimensioned: 20.2 mm outer length, 12.6 mm outer width, 3.5 mm thick

3. Feature

Air core, hollow rectangular winding. No core, no bobbin and no potting in the window, so the inductance comes from the winding geometry.

289 turns of 0.16 mm enameled copper wire. High-purity enameled copper, stated on the detail render with the turn count.

Tight layer winding. The layers are laid flat and tight, which is what holds the 3.5 mm thickness across a 20.2 mm length.

Precision stripped and tinned terminals. Both lead ends are stripped and tinned, so they go straight into a solder joint or a terminal block.

20 mm leads. Long enough to reach a pad or a connector without an extension, and quoted to within 2 mm.

Stated as high Q factor with low magnetic loss. The sheet's own description of the magnetic behaviour; no Q figure is quoted.

Fast energy transfer, low loss, high efficiency. The application the sheet names for the part, rather than a measured efficiency.

Custom size, winding and wire configuration. The geometry is the specification, so a different window, turn count or wire is a different drawing.

4. Advantage

Nothing in the magnetic path. An air core has no core material to add loss or to saturate, which is why the winding geometry carries the specification.

Reproducible from the sheet. Turn count and wire diameter are stated, so a replacement or a scaled version can be specified without a sample in hand.

Flat where height is the constraint. 3.5 mm thick against a 20.2 mm length: it fits where a pot core or a toroid will not.

Solderable as supplied. Stripped and tinned ends remove the preparation step at the bench.

Made to the drawing. Size, winding and wire are all offered as custom, from the same flat-wound geometry.

5. Application

Wireless power transfer. Charging pads and receiver coils, the application the sheet leads with.

Smart sensing. Where the coil itself is the sensing element rather than a component in a filter.

RFID and signal transmission. The high-frequency, low-loss use the sheet names for this winding.

Precision SMT modules. Thin wound parts that go onto a populated board rather than into a magnetics can.

Shown with wireless charging and sensing hardware, the application the sheet names

Shown with a populated control board, for SMT modules, RFID and signal transmission

6. Specifications

The tables below reproduce what the supplied material states for this coil. Where no figure is given, the cell says so instead of carrying a number in from another winding. Note that the electrical side of an inductor is largely absent from the source: inductance, resistance, Q and current are not stated.

6.1 Summary

Item	Specification	Note
Product type	Flat air core inductor coil	Coil structure: flat wound, hollow
Core	Air core	No core material in the window
Winding material	Enameled copper wire	High purity, 0.16 mm
Number of turns	289	Tight layer winding
Outer size	20.2 x 12.6 mm	Both within 1 mm
Thickness	3.5 mm	Within 0.5 mm
Window	15.6 x 7.36 mm	Within 0.5 mm
Leads	20 mm, stripped and tinned	Within 2 mm
Customization	Size, winding, wire configuration	Made to drawing
Inductance	Not stated	Ask for it at a stated frequency
DC resistance	Not stated	Ask for it with the inductance
Q factor	Described as high	No figure quoted
Model number	None assigned	Ordered by drawing or description

6.2 Winding and electrical

Parameter	Value	Note
Wire diameter	0.16 mm	Enameled copper, high purity
Turn count	289 turns	Tight layer winding
Winding form	Flat, hollow rectangle	Layers stacked through the thickness
Termination	Stripped and tinned	Both lead ends
Lead length	20 mm	Within 2 mm
Inductance	Not stated	Not measured or not supplied
DC resistance	Not stated	Not measured or not supplied
Q value and current rating	Not stated	Q described as high only

The electrical specification is the gap on this part. Inductance is not stated, so neither is the frequency it was measured at; DC resistance, Q value, current rating and self-resonant frequency are absent as well. The sheet describes the coil as high Q factor with low magnetic loss, which is a design intent rather than a figure, and two coils of the same size and turn count can differ once the wire and the winding tension differ. Ask for inductance and DC resistance at a stated frequency before designing the coil into a tuned circuit.

6.3 Mechanical dimensions

Item	Value	Tolerance / note
Outer length	20.2 mm	Within 1 mm
Outer width	12.6 mm	Within 1 mm
Thickness	3.5 mm	Within 0.5 mm, stack of winding layers
Inner length	15.6 mm	Within 0.5 mm
Inner width	7.36 mm	Within 0.5 mm
Lead length	20 mm	Within 2 mm, from the winding
Lead spacing at exit	Not stated	Check on the drawing
Weight	Not stated	Check on the drawing

The technical specification panel supplied for this coil

Read the dimensions as a wound part. The tolerances are 1 mm on the outer length and width, 0.5 mm on the thickness and on the window, and 2 mm on the lead length, so the window is the dimension to allow clearance for rather than the outer envelope. The lead exit and the tape band sit at one end; nothing in the supplied material states the lead spacing at that exit, so check it on the drawing before the pad geometry is fixed.

6.4 Materials

Item	Specification	Note
Conductor	Enameled copper wire	0.16 mm, high purity
Core	None	Air core, hollow window
Insulation	Enamel coating on the wire	Grade not stated
Winding retention	Tape band at the lead exit	Visible on the renders
Terminal finish	Tinned	Stripped before tinning
Encapsulation	None	Open winding, no potting

Air-core coils of other shapes and sizes, showing the range custom winding covers

6.5 Quality and inspection

Item	Statement	Note
Inspection	100 % full inspection	Stated for the production run
Quality control	Strict quality control	Stated, method not given
Safety and reliability	High standards claimed	No standard named
Electrical test data	Not supplied	No L, DCR or Q figure
Certificate number	Not supplied	No test report with the material

7. Ordering

There is no model number on this build, so the part is ordered by description or by drawing: flat air core coil, 289 turns, 0.16 mm enameled copper wire, 20.2 mm by 12.6 mm, 3.5 mm thick, 20 mm tinned leads. Size, winding and wire configuration are all offered as custom, so a different turn count, a different wire diameter or a different window is a new drawing rather than a variant of this one. If the circuit needs a stated inductance or a DC resistance, quote it with the measurement frequency when enquiring.

Certification: no certificate or test report was supplied with this material, so no compliance claim is made on this page and the render that carries a row of certification badges was not used. If the listing needs a certificate, quote the number from the certificate itself.

Empty cells on purpose: product ID, product category, minimum order quantity, freight method, stock, weight, sales price and cost price are not given in the supplied material, so they are left blank rather than estimated. The part has no model number in the source, so column D is empty by design. Packing and lead time are not stated either; both are confirmed on enquiry.

Brand / manufacturer: ZXY, Shenzhen Zhixiangyuan Electronics Co., Ltd. http://www.zxycoil.com

Specifications

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · Specifications
Item	Statement
Product type	Flat air core inductor coil
Core	None
Winding material	Enameled copper wire
Number of turns	289
Outer size	20.2 x 12.6 mm
Thickness	3.5 mm
Window	15.6 x 7.36 mm
Leads	20 mm, stripped and tinned
Customization	Size, winding, wire configuration
Inductance	Not stated
DC resistance	Not stated
Q factor	Described as high
Model number	None assigned
Wire diameter	0.16 mm
Turn count	289 turns
Winding form	Flat, hollow rectangle
Termination	Stripped and tinned
Lead length	20 mm
Q value and current rating	Not stated
Outer length	20.2 mm
Outer width	12.6 mm
Inner length	15.6 mm
Inner width	7.36 mm
Lead spacing at exit	Not stated
Weight	Not stated
Conductor	Enameled copper wire
Insulation	Enamel coating on the wire
Winding retention	Tape band at the lead exit
Terminal finish	Tinned
Encapsulation	None
Inspection	100 % full inspection
Quality control	Strict quality control
Safety and reliability	High standards claimed
Electrical test data	Not supplied
Certificate number	Not supplied

Only supplied parameters are shown. Please confirm any unlisted electrical performance, test conditions, tolerances and customization options with our engineers. The final specification sheet takes precedence.

Product Images & Drawings

View the available product images and drawings below. Click to open the original. Customized products are subject to the agreed specifications and drawings.

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings2 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 2View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings3 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 3View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings4 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 4View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings5 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 5View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings6 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 6View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings7 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 7View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings8 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 8View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings9 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 9View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings10 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 10View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings11 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 11View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings12 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 12View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings13 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 13View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings14 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 14View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings15 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 15View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings16 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 16View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings17 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 17View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings18 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 18View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings19 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 19View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings20 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 20View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings21 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 21View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings22 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 22View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings23 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 23View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings24 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 24View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings25 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 25View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings26 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 26View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings27 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 27View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings28 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 28View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings29 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 29View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings30 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 30View Original

Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding — Product Images & Drawings31 — Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding · 31View Original

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Selection & Customization Requirements

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Your equipment, application, operating environment and temperature range.
As applicable: inductance, turns ratio or impedance, operating frequency, voltage, current and insulation requirements.
Size limits, mounting method, pin spacing, and any existing drawings or reference samples.
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Frequently Asked Questions

Common procurement questions about Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding.

What is Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding?

Can Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding be customized to our specifications?

Yes. Shenzhen ZhiXiangyuan Electronics Co., Ltd. provides OEM/ODM services. Inductance, turns ratio, current rating, core material, size and terminal style can all be customized according to your drawings or samples.

What is the MOQ and lead time for Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding?

MOQ is negotiable based on the specific model and order quantity. Typical lead time is 1-3 weeks for standard items and 2-4 weeks for customized orders. Contact our sales team for an exact quotation.

Do you provide samples of Flat Air Core Inductor Coil, 289 Turns of 0.16 mm Enameled Copper Wire, 20.2 x 12.6 x 3.5 mm, Hollow Rectangular Winding?

Yes, samples are available for evaluation before bulk orders. Please send us your requirements and shipping details to request samples.

What is the model number of this product?

The model number is 20.2×12.6×3.5mm / 289T. Custom model numbers can be assigned for OEM orders.

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