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400v 220v AC DC Step Down ER28 High Frequency Pulse Transformer For Adapter Smart Meter
Place of Origin:
China
Brand Name:
Chipsen
Certification:
ISO9001:2015, ISO14001:2015, IATF16949, UL/cUL, ROHS, REACH, CQC
Model Number:
ER28
Minimum Order Quantity:
100pcs
Packaging Details:
Carton 1: 25.5 X 21.5 X 21cm. Carton 2: 43.5 x 24.5 x 21 cm
Delivery Time:
3~4 Weeks
Payment Terms:
T/T
Supply Ability:
10,000,000pcs/month
Inquiry Now
Get A Quote
Specifications
Highlight Features
400v High Frequency Pulse Transformer
,220v High Frequency Pulse Transformer
,ER28 frequency transformer
Core Type:
ER28 / ER28.4 Ferrite Core
Core Material:
PC40 / PC44 / DMR44 Mn-Zn Ferrite
Output Power:
20W–60W (Customizable)
Operating Frequency:
50kHz–150kHz
Primary Inductance (Lp):
400uH–800uH ±7%
Leakage Inductance:
≤2% Of Lp
Turns Ratio:
Customized As Per Drawing
Input Voltage:
85–265VAC / 12–60VDC
Output Voltage:
5V / 12V / 24V (Multi-output Available)
DC Resistance (DCR):
Per Specification
Product Description
400V 220V AC DC Step Down ER28 High Frequency Pulse Transformer For Adapter & Smart Meter
This ER28 high frequency switching transformer is designed for compact AC-DC step-down power conversion in adapters, chargers, smart meters and industrial control power supplies. Built on an ER28 Mn-Zn ferrite core with a vertical PCB-mount bobbin, it delivers stable output, low leakage inductance and reliable insulation under continuous operation. UL recognized materials (File No. E332338) and full OEM / ODM customization are available - windings, turns ratio, pin configuration and output voltage can all be built strictly to your drawing.
Key Advantages
- UL Recognized Construction - manufactured with UL listed insulation materials, file number E332338, ready for global safety approval projects.
- Sandwich Winding, Low Leakage - primary/secondary interleaved winding keeps leakage inductance low and improves conversion efficiency.
- TIW / Enameled Copper Option - 100% full copper wire, triple insulated wire available for reinforced isolation designs.
- Wide Temperature Operation - stable performance from -40℃ to +130℃, suitable for outdoor smart meters and industrial cabinets.
- Vacuum Varnish Impregnated - anti-vibration, moisture proof, low audible noise.
- 100% Tested - inductance, turns ratio, Hi-pot and short-circuit test on every single piece before packing.
- Fast Custom Sampling - 5-7 working days for customized samples against your specification.
Product Specification
| Item | Description |
|---|---|
| Product Name | ER28 High Frequency Pulse / Switching Transformer |
| Model No. | MTER2834-152-14492 (customizable) |
| Core Type | ER28 / ER28.34 Ferrite Core |
| Core Material | Mn-Zn Ferrite, PC40 / PC44 / DMR44 |
| Bobbin | Vertical Type, PBT / Phenolic, UL94 V-0 |
| Pin Configuration | Customized (e.g. 5+5 pins), PCB Through Hole |
| Wire Material | Enameled Copper Wire / TIW (Triple Insulated Wire) |
| Input Voltage | 85-265VAC / 220VAC / 400VAC (per design) |
| Output Voltage | 5V / 12V / 24V, multi-output available |
| Output Power | 20W - 60W (design dependent) |
| Operating Frequency | 50kHz - 150kHz |
| Primary Inductance | As per drawing, tolerance ±7% |
| Leakage Inductance | ≤ 2% of primary inductance |
| Topology | Flyback / Forward / Push-Pull |
| Insulation Class | Class B (130℃) / Class F (155℃) |
| Dielectric Strength | 3000VAC / 1 minute, Primary to Secondary |
| Insulation Resistance | ≥ 100MΩ @ 500VDC |
| Operating Temperature | -40℃ to +130℃ |
| Certification | UL Recognized Material (E332338), RoHS, REACH |
| Customization | OEM / ODM accepted, built to customer drawing or sample |
Applications
| Field | Typical Use |
|---|---|
| Power Adapter & Charger | AC-DC step down adapters, wall chargers, desktop power supplies |
| Smart Metering | Smart electricity / water / gas meter auxiliary power |
| Industrial Control | PLC power modules, instrument power, driver boards |
| LED Lighting | LED driver, constant voltage / constant current power supply |
| Home Appliance | Standby power supply, control board power conversion |
Quality Control
- IQC - incoming inspection on ferrite cores, bobbins, copper wire and insulation tape.
- IPQC - winding turns, tape layers and soldering checked in process.
- OQC - 100% inductance, turns ratio, DCR and Hi-pot test before shipment.
- Reliability - temperature rise test, aging test and vibration test on request.
Packaging & Shipping
- Inner Packing: anti-static tray / blister tray + PE bag
- Outer Packing: standard export carton, protected against moisture and impact
- Sample Lead Time: 5-7 working days
- Mass Production: 15-25 days after order confirmation
- Shipping: DHL / FedEx / UPS express, by air or by sea
- Trade Terms: EXW / FOB / CIF
FAQ
Q1: Are you a manufacturer or trading company?
A: We are a manufacturer specialized in transformers and inductors, with in-house winding, assembly and testing.
Q2: Can you make the transformer according to my drawing?
A: Yes. Send us your drawing or a sample with the required inductance, turns ratio, output voltage and pin layout, and we will build it exactly to your specification.
Q3: What is the MOQ?
A: Small trial orders are accepted. Please contact us with your target quantity for the best price.
Q4: Can I get a free sample?
A: Standard samples are available for evaluation; customized samples are quoted according to the design.
Q5: How do you guarantee quality?
A: Every piece is 100% electrically tested, and UL recognized insulation materials are used in production.
Send us your specification today - inductance, turns ratio, input/output voltage and pin configuration - and receive a technical proposal with quotation within 24 hours.
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