Calex obtains UL approval on 250W Quarter Brick

CalEx LogoCalex Mfg. Co., Inc. of Concord CA announces that the Calex QMW quarter brick now is UL60950 approved.  The QMW has an ultra wide 9 to 36V input range making the unit ideal for 12V and 24V battery powered applications.  The QMW features remote ON/OFF for battery conservation.  The QMW is isolated input to output and provides a fully regulated 12V output with 20.5A of output current max.  The QMW has a peak efficiency of 93% with a fixed switching frequency of 275kHz.

The QMW measures 1.54″ x 2.39″ x 0.50″ and is designed to meet MIL-STD-810G for functional shock and vibration.  The unit features over-current protection, over-voltage protection, short circuit protection as well as over-temperature protection and is backed by Calex’s Five Year Warranty.  The operating temperature range of the QMW is -40C to +105C.  The storage temperature is -55C to +125C.

The line and load regulation of the QMW is 0.2%.  The temperature coefficient is 0.02%/C.  Output ripple is 50mV peak to peak.  The QMW does not require a minimum load for proper operation.  The MTBF is 8.6M hours.  The unit is RoHS compliant.