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400v 220v AC DC Step Down ER28 High Frequency Pulse Transformer For Adapter Smart Meter

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400v 220v AC DC Step Down ER28 High Frequency Pulse Transformer For Adapter Smart Meter

Certification : ISO9001:2015, ISO14001:2015, IATF16949, UL/cUL, ROHS, REACH, CQC

Output Power : 20W–60W (Customizable)

Model Number : ER28

Core Material : PC40 / PC44 / DMR44 Mn-Zn Ferrite

MOQ : 100pcs

Packaging Details : Carton 1: 25.5 X 21.5 X 21cm. Carton 2: 43.5 x 24.5 x 21 cm

Primary Inductance (Lp) : 400uH–800uH ±7%

Output Voltage : 5V / 12V / 24V (Multi-output available)

Supply Ability : 10,000,000pcs/month

Turns Ratio : Customized as per drawing

Payment Terms : T/T

Leakage Inductance : ≤2% of Lp

Delivery Time : 3~4 Weeks

Input Voltage : 85–265VAC / 12–60VDC

Place of Origin : China

Operating Frequency : 50kHz–150kHz

Brand Name : Chipsen

Core Type : ER28 / ER28.4 Ferrite Core

DC Resistance (DCR) : Per specification

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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.
400v 220v AC DC Step Down ER28 High Frequency Pulse Transformer For Adapter Smart Meter

Product Tags:

400v High Frequency Pulse Transformer

      

220v High Frequency Pulse Transformer

      

ER28 frequency transformer

      
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