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EI28 Low Frequency Power Transformer 220V to 12V –Vertical PCB Pin Mount Core Voltage Converter
● EI28 Laminated Silicon Steel Core: Stacked EI core in Z11 silicon steel sheet for stable magnetic performance.
- 型号
- EI28
- 产品类型
- 低频降压电源变压器，EI叠片磁芯
- 安装方式
- 垂直PCB引脚安装（焊接）
Phone:13554723725
Email:rhea@zxycoil.com
Description
Application Specifications
| Parameter | Specification |
| Model | EI28 |
| Product type | Low-frequency step-down power transformer, EI laminated core |
| Mounting | Vertical PCB pin mount (solder-in) |
| Input voltage | 220V AC, 50/60Hz (primary pins 1-2) |
| Output voltage | 12V AC (secondary pins 3-5) |
| Frequency | 50/60Hz |
| Rated capacity | Customized — built to the voltage and current required by the circuit |
| Core | EI28 laminated core; Z11 silicon steel sheet |
| Winding | 100% copper wire |
| Bobbin | Nylon, double-slot vertical |
| Enclosure | Blue steel shell |
| Temperature rise | Under 20°C |
| Product size | 28.5mm |
| Certification | RoHS compliant; ISO 9001:2015 certified manufacturing |
| MOQ | 1000 pieces |
| Lead time | From stock or 3 weeks |
| Supply capacity | 1000K pcs per month |
| Packing | Carton; 15 × 10 × 8 cm, 0.15 kg per piece |
Product Features
● EI28 Laminated Silicon Steel Core: Stacked EI core in Z11 silicon steel sheet for stable magnetic performance.● 220V to 12V Step-Down Winding: Standard 220V AC primary with a 12V AC secondary (pins 1-2 in, 3-5 out).● Vertical PCB Pin Mount: Solder-in pins mount the transformer directly on the board and save enclosure space.● 100% Copper Winding: High-purity copper wire keeps resistance and losses low.● Nylon Double-Slot Bobbin: Primary and secondary windings sit in separate slots of a nylon bobbin.● Blue Steel Shell: Protects the bobbin and windings against dust, knocks and crushing.● 50/60Hz Compatible: Runs on both mains frequencies.● Low Temperature Rise: Under 20°C, supporting long-term continuous operation.
Product Advantages
● Precise step-down ratio: the primary-to-secondary turns ratio is configured to deliver the exact low voltage the downstream circuit needs.● EI28 core in Z11 silicon steel sheet: the laminated EI structure reduces magnetic leakage, so power transfers efficiently from the primary to the secondary side.● 100% copper windings: high-purity copper wire minimises resistance and power loss during operation.● Stable output: inherent voltage-regulation characteristics hold the output steady even when the input voltage or the load changes.● Low temperature rise, under 20°C: heat from winding and core losses is dissipated efficiently, so the transformer holds its performance under continuous load and lasts longer.● Compact footprint with vertical PCB pins: a small board area and no external wiring, which suits small devices and tightly packed boards.● Low electromagnetic interference: optimised winding technique limits EMI, so the transformer can sit next to sensitive components and communication circuits.● High reliability: high-quality materials and controlled manufacturing let the unit handle normal working conditions plus occasional electrical transients and mechanical vibration.
Application scenario
10-场景图 (2)
11-场景图 拷贝 (9)
12-场景图 拷贝 (7)
13-场景图 拷贝 (7)
Application
Power adapters for small appliances
Steps 220V mains down to the low voltage the adapter circuit regulates.
Power supply modules in electronic devices
The board-mounted low-voltage stage ahead of rectification and regulation.
Compact PCB assemblies
Vertical pin mounting fits boards with tight layouts.
Portable equipment and small chargers
Limited internal space, where a small EI28 body is an advantage.
Precision instruments
A stable low-voltage input for measurement and control circuits.
Communication equipment
Low EMI behaviour suits systems that are sensitive to interference.
Product Details Showcase
6-细节图 拷贝 (10)
7-细节图 拷贝 (10)
8-细节图 拷贝 (7)
9-细节图 拷贝 (6)
Quality & Testing Assurance
Quality management system
Production runs under an ISO 9001:2015 certified quality management system.
In-process quality control
Production follows strict in-process quality control under the certified management system.
Rating label on every unit
Each transformer carries a printed label showing the model, frequency, input and output voltage, the pin assignment and the manufacturer name.
Material compliance
RoHS compliant materials.
Supply capacity
1000K pcs per month, shipped from stock or with a 3-week lead time.
证书 拷贝
证书
Specifications
| 型号 | EI28 |
|---|---|
| 产品类型 | 低频降压电源变压器，EI叠片磁芯 |
| 安装方式 | 垂直PCB引脚安装（焊接） |
| 输入电压 | 220V AC，50/60Hz（初级引脚1-2） |
| 输出电压 | 12V AC（次级引脚3-5） |
| 频率 | 50/60Hz |
| 额定容量 | 定制——根据电路所需的电压和电流制造 |
| 磁芯 | EI28叠片磁芯；Z11硅钢片 |
| 绕组 | 100%铜线 |
| 骨架 | 尼龙，双槽垂直式 |
| 外壳 | 蓝色钢制外壳 |
| 温升 | 低于20°C |
| 产品尺寸 | 28.5mm |
| 认证 | 符合RoHS；ISO 9001:2015认证制造 |
| 最小起订量 | 1000件 |
| 交货时间 | 现货或3周 |
| 供货能力 | 每月100万件 |
| 包装 | 纸箱；15 × 10 × 8 cm，每件0.15 kg |
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.
Downloads
No specification sheet has been uploaded for this model yet. Use the inquiry form below to request parameters, dimension drawings or sample information.
Selection & Customization Requirements
To help confirm a suitable model and specification, please provide:
- 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.
- Sample quantity, estimated order volume and desired delivery date.
Frequently Asked Questions
Common procurement questions about EI28 Low Frequency Power Transformer 220V to 12V –Vertical PCB Pin Mount Core Voltage Converter.
What is EI28 Low Frequency Power Transformer 220V to 12V –Vertical PCB Pin Mount Core Voltage Converter?
● EI28 Laminated Silicon Steel Core: Stacked EI core in Z11 silicon steel sheet for stable magnetic performance.
Can EI28 Low Frequency Power Transformer 220V to 12V –Vertical PCB Pin Mount Core Voltage Converter 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 EI28 Low Frequency Power Transformer 220V to 12V –Vertical PCB Pin Mount Core Voltage Converter?
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 EI28 Low Frequency Power Transformer 220V to 12V –Vertical PCB Pin Mount Core Voltage Converter?
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 EI28. Custom model numbers can be assigned for OEM orders.
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