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EI28 Low-Frequency Power Transformer 220V to 12V - Vertical PCB Pin Mount Core Voltage Converter
● EI28 Laminated Silicon Steel Core: Made with Z11 silicon steel laminations 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:+86 13554723725
Email:rhea@zxycoil.com
Description
Application Specifications
| Parameter | Specification |
| Model | EI28 |
| Product Type | Low-frequency step-down power transformer, EI laminated core |
| Mounting Method | Vertical PCB pin mount (solder type) |
| Input Voltage | 220V AC, 50/60Hz (primary pins 1-2) |
| Output Voltage | 12V AC (secondary pins 3-5) |
| Frequency | 50/60Hz |
| Rated Power | Customizable - manufactured according to the voltage and current required by the circuit |
| Core | EI28 laminated core; Z11 silicon steel |
| Winding | 100% copper wire |
| Bobbin | Nylon, dual-slot vertical |
| Housing | Blue steel shell |
| Temperature Rise | Below 20°C |
| Product Dimensions | 28.5mm |
| Certifications | RoHS compliant; ISO 9001:2015 certified manufacturing |
| Minimum Order Quantity | 1000 pieces |
| Delivery Time | In stock or 3 weeks |
| Supply Capacity | 1000K pieces per month |
| Packaging | Carton; 15 × 10 × 8 cm, 0.15 kg per piece |
Product Features
● EI28 Laminated Silicon Steel Core: EI core made with Z11 silicon steel laminations for stable magnetic performance. ● 220V to 12V Step-Down Winding: Standard 220V AC primary, 12V AC secondary (pins 1-2 input, 3-5 output). ● Vertical PCB Pin Mount: Solder-type pins mount the transformer directly onto the circuit board, saving enclosure space. ● 100% Copper Winding: High-purity copper wire reduces resistance and losses. ● Nylon Dual-Slot Bobbin: Primary and secondary windings are placed in separate slots of the nylon bobbin. ● Blue Steel Shell: Protects the bobbin and windings from dust, impact, and compression. ● 50/60Hz Compatible: Operates at both mains frequencies. ● Low Temperature Rise: Below 20°C, supporting long-term continuous operation.
Product Advantages
● Precise Step-Down Ratio: The primary-to-secondary turns ratio is configured to accurately output the low voltage required by downstream circuits. ● EI28 Core with Z11 Silicon Steel: The laminated EI structure reduces flux leakage, enabling efficient energy transfer from primary to secondary. ● 100% Copper Winding: High-purity copper wire minimizes resistance and power loss during operation. ● Stable Output: Inherent voltage regulation keeps the output stable under input voltage or load variations. ● Low Temperature Rise Below 20°C: Heat generated by winding and core losses is effectively dissipated, maintaining performance and extending service life under continuous load. ● Compact Profile with Vertical PCB Pins: Occupies minimal board area, requires no external wiring, and suits small devices and compact circuit layouts. ● Low EMI: Optimized winding techniques limit EMI, allowing the transformer to be mounted near sensitive components and communication circuits. ● High Reliability: Premium materials and controlled manufacturing processes enable the product to withstand normal operating conditions as well as occasional electrical transients and mechanical vibration.
Application Scenarios
10-Scenario Image (2)
11-Scenario Image Copy (9)
12-Scenario Image Copy (7)
13-Scenario Image Copy (7)
Application Areas
Power Adapters for Small Appliances
Steps down 220V mains to the low voltage required by the adapter circuit.
Power Modules in Electronic Devices
On-board low-voltage stage before rectification and regulation.
Compact PCB Assemblies
Vertical pin mounting suits circuit boards with tight layouts.
Portable Devices and Small Chargers
Limited internal space makes the compact EI28 body an advantage.
Precision Instruments
Provides stable low-voltage input for measurement and control circuits.
Communication Equipment
Low EMI characteristics suit interference-sensitive systems.
Product Detail Display
6-Detail Image Copy (10)
7-Detail Image Copy (10)
8-Detail Image Copy (7)
9-Detail Image Copy (6)
Quality and Testing Assurance
Quality Management System
Production operates 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 Each Unit
Each transformer is affixed with a printed label indicating model, frequency, input/output voltage, pin assignment, and manufacturer name.
Material Compliance
RoHS-compliant materials.
Supply Capability
Monthly capacity of 1 million units, available from stock or with a 3-week lead time.
Certificate Copy
Certificate
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: Made with Z11 silicon steel laminations 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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