TMR 3WIR and TMR 6WIR Series


World smallest certified 6 Watt SIP8 DC/DC converter for railway applications

The TMR 3WIR and the TMR 6WIR series are a set of 3/6 Watt DC/DC converters in a SIP-8 metal case. The design purpose of these series was to miniaturized low power DC/DC converters for railway application to the maximum without sacrificing highest efficiency. They operate up to 78°C environment temperature at full load and up to 90°C with a 50% load derating.

With EN 50155 and UL 60950-1 certification, 3'000 VDC I/O-isolation voltage, external On/Off, current limitation and short current protection they cover a wide range of application when space is limited.

The input of the converters is designed for a wide voltage range (4:1) and a minimum load is not required


Ultra wide 4:1 Input: 9–36, 18–75, 43–160 VDC

Miniaturized to the maximum

EN 50155 railway approval

I/O-isolation 3‘000 VDC

High efficiency for low thermal loss

Operating temperature range: -40°C to +90°C

Remote On/Off

Short circuit protection

3-year product warranty

EN 50155 railway approval

UL 60950-1 certified


Models and Datasheet:

TMR 3WIR Series

TMR 6WIR Series