HM42 Series Transformers

TT Electronics
Part Number Information
Part #: Price/Availability:
HM42-1 Buy Now
HM42-2 Buy Now
HM42-3 Buy Now
HM42-4 Buy Now

"The gate drive transformers were designed to meet the needs of high power, high-frequency power electronics circuit designers,” said Donna Schaefer, application engineering manager for TT electronics’ BI Technologies. “Along with the 1500Vdc isolation, the transformers are operational up to 1MHz, making them ideal for power circuits in switchmode power supplies, along with any power electronics circuit where a power MOSFET is required.


  • Operating frequency range from 50kHz to 1MHz
  • DCRs range from 0.6Ω to 2.0Ω for the primary winding and 0.3 to 2.0Ω for the secondary winding
  • Turns ratios, depending on model configuration, include 1:1, 1:1:1 and 2:1:1
  • Minimum primary inductance ranges from 1200µH to 300µH
  • [RoHS Compliant] transformers are offered in package sizes ranging from 3mm to 7.8mm
  • Operating temperature ranges from -40° to +125°C


  • Power circuits in switchmode power supplies
  • Power electronics circuit where a power MOSFET is required