The HQA series has been qualified using methods consistent with MIL-STD-883, and offers two screening and operating temperature options. The HQA120 M-Grade has functional testing in cold, hot and room ambient temperatures, and an extended 96 hour burn-in with ten-cycle temperature testing. The S-Grade (HQA85 and HQA120) has functional testing in hot and room ambient temperatures and the standard burn-in period. The full load operating temperature for the M-Grade is -55 to 115°C, and -40 to 115°C for the S-Grade.
A constant switching frequency enables easier EMC system compliance and, without the use of optocouplers in the control loops, high temperature long-term reliability is increased. All models feature auto-recovery protection for both input under voltage and output overload. The outputs can be adjusted using the trim function by ±10%, and turned on or off remotely.
Two baseplate mounting versions are available. The flanged format measures 60.6×55.9×12.7mm, with the non-flanged following the standard quarter brick format and measuring 60.6x39x12.7mm.
Safety certification includes IEC/EN 60950-1, UL/CSA 60950-1 with CE marking for the Low Voltage and RoHS2 Directives. Input to output and input to baseplate isolation is 2250VDC.