MIL-COTS filters protect DC/DC converters against surges

The filters have high differential and common mode noise attenuation, simplifying system level compliance to the MIL-STD-461(F, G) standard. The module’s surge and spike protection also assists qualification to MIL-STD-1275(D, E) and RTCA/DO-160G (Sec 16-18). Qualifying testing is consistent with MIL-STD-883F and MIL-STD-202G.

The FQB has an operating input voltage range of 8.5Vdc to 40Vdc, and can withstand transients of up to -50 to +210V. Additionally it provides reverse input, under/over voltage and over current protection. A remote on/off function and an open collector DC Good / Fault signal is fitted as standard. Vehicle battery drain is minimised by a no-load current consumption of typically 3mA, which is reduced to just 1.5mA when the remote on/off function is initiated. The total DC resistance of the filter is typically 30mΩ, further minimising power losses.

The FQB filters have standard production screening (-S suffix) and a baseplate temperature rating of -40 to +115°C, or enhanced screening (-M suffix) and an extended temperature rating of -55°C to +115°C. Enhanced screening includes functional testing at high and low temperatures and a 96 hour burn-in period with temperature cycling.

The PCB mount FQB is cooled using either an industry standard ¼ brick heatsink, or conduction cooled via a cold plate. The non-flanged package measures 60.6x39x12.7mm and the flanged version 60.6x55.9x12.7mm. All models have been safety certified to IEC/UL/CSA 60950-1, IEC/UL/CSA 62368-1 (pending) and carry the CE mark.