High Temperature


IR offers high reliability, hermetic, hybrid DC-DC converters designed for extreme temperature and high shock applications: these products are used in down-hole drilling and seismic and natural resource exploration equipment.

High Temperature DC-DC Converters up to +185°C


IR HiRel high temperature DC-DC converters are designed for high power subsurface applications up to 185°C including down-hole drilling, seismic and natural resource exploration equipment.
IR HiRel high temperature DC-DC converters are well suited as building blocks and intermediate bus converters for power systems. Available as commercial off-the-shelf (COTS), the high temperature converters significantly reduce design cycles and design costs associated with high temperature engineering.
IR HiRel high temperature DC-DC converters use a conservative design approach inspired from HiRel space and military expertise and hermetic, hybrid package construction and process to deliver functionality up to high continuous operating case temperature and to survive high shock environment. Hybrid converters can provide the same power in a smaller size than typical PCB designs, allowing more functionality in the same tool size. Hermetic converters offer higher reliability in a high temperature and high shock environment.


  • Internal EMI filter
  • Magnetic coupled feedback
  • 100MOhms @ 500VDC isolation
  • Under-voltage lockout
  • Frequency synchronization
  • Short circuit and overload protection
  • External Inhibit
  • Trimmable output voltage (single output)
  • Stackable to achieve higher output power

High Temperature Converters Key Benefits:

  • Well characterized performances under the temperature extremes without power de-rating
  • Designed for high voltage applications
  • Thermal management using proprietary package design
  • Low noise design to facilitate system integration
  • Qualified high temperature processes for long term mechanical integrity and reliability
  • Designed to operate through severe shock and vibration environments


Part Number Case
(not including pins)
Nominal Input Voltage Output Voltage Number of Output Output Current Output Power Weight Operating Case Temperature
HTA200XXS 2.5”x1.5”x0.43”
With or without flanges
200V 15V
Single 1.33A
6.1 A
20W 70g -35ºC to +185 ºC
HTA200XXD 2.5”x1.5”x0.43”
With or without flanges
200V +15V
Double 1.06A
20W 70g -35ºC to +185 ºC
HTH27022S 3.5” x 2.15” x 0.4” 270V 22V Single 2.5A 55W 70g -20ºC to +165 ºC
HTM27092S 4.0” x 2.15” x 0.4” 270V 92V Single 1.0A 92W 80g -20ºC to +165 ºC
HT Family Selector Guide