ETD34 Horizontal Pin Type High Frequency Transformer

The ETD34 high frequency transformer is a horizontal pin-type (through-hole / PCB mounting) switching power transformer built on an ETD34 ferrite core. Designed for continuous operation in solar inverters, UPS systems, EV chargers and industrial SMPS, it delivers stable power conversion, low temperature rise and reliable insulation under long-duty and high-ambient conditions. Windings, turns ratio, inductance, pin-out and creepage design are fully customizable to your circuit schematic.

• ETD34 ferrite core -- large window area and good thermal path, suitable for medium-power converters at typical switching frequencies of 20 kHz-150 kHz.
• Horizontal pin type -- low profile after mounting, saving vertical PCB space; pin count and pitch made to drawing.
• Low loss & low temperature rise -- core material and wire gauge matched to your frequency and current for higher conversion efficiency.
• Reinforced insulation -- margin tape / triple insulated wire (TIW) options to meet primary-secondary isolation and creepage requirements.
• Vacuum varnish impregnation -- reduces audible noise, improves moisture resistance and mechanical strength.
• UL recognized insulation system -- UL file reference E332338; RoHS & REACH compliant materials.
• 100% tested -- inductance, turns ratio, DCR, leakage inductance and Hi-Pot tested before shipment.

• Solar / PV inverters and energy storage systems (ESS)
• Uninterruptible power supplies (UPS)
• EV chargers and on-board chargers (OBC)
• Industrial switching power supplies, LED drivers, servo and communication power
• Home appliance and medical power boards

Send us your drawing, schematic or a sample, and our engineering team will propose the core material, wire type, winding structure and safety spacing that best fit your efficiency, temperature-rise and cost targets. Customizable items include: core size and material, turns ratio, inductance and tolerance, leakage inductance, pin-out, insulation class, lead length and marking/logo.

• Incoming inspection of cores, bobbins, wire and tape
• In-process inspection at winding, soldering and assembly stations
• 100% electrical test: inductance, turns ratio, DCR, leakage inductance, Hi-Pot
• Temperature-rise and burn-in verification for sample and pilot runs
• Full traceability by production lot

Packing: anti-static bag / blister tray → inner carton → export carton (customized packing accepted)

Sample lead time: 7-10 working days after specification confirmation

Mass production lead time: 15-25 days, subject to quantity

Trade terms: EXW / FOB / CIF

Shipping: by express, air or sea

Tell us your input/output voltage, power, switching frequency, topology (flyback / forward / LLC / push-pull) and target dimensions, and we will recommend a suitable ETD34 solution and quote within 24 hours.