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Automatic Power Selector



The Bocatech Automatic Power Selectors (APS) provides a simple, solid state solution for redundant DC power for vital electronic equipment while maintaining isolation of the DC power sources.

The independent batteries are wired to higher torque-accepting terminals and internal diodes maintain total isolation between them. They are combined in a single output which is wired to the load. Current is automatically drawn from the battery with the higher voltage. Isolation prevents the higher-charged battery from “dumping” into the lower charged or failed battery.

The unit is ruggedly constructed with heavy-duty wiring studs and epoxy potted components in an anodized aluminum case. Wiring nuts, washers and mounting screws are provided.



  • Maintains isolation of the DC power sources

  • Solid state

  • Rated for systems up to 48VDC

  • Higher torque-accepting stainless steel fixtures

  • Rugged anodized aluminum case

  • Designed with low voltage drop Schottky diode


Input Voltage Range6-50VDC, negative ground
Maximum Load Current160amps
Operating Temperature-40° to +80°
Derate linearlyfrom 100% @ 50%C° to 70%@80°C
Voltage Drop0.3VDC @ full load
Dimensions - inches/mm L x W x H      8­­­.0 x 4.5 x 2.5/ 203.2 x 114.3 x63.5


BTAPS1-4B Automatic Power Selector

  • We strive to ship items as soon as posssible. Occassionally an item might not be in stock that day. We will ship it as soon as it becomes aviailable and will notify you of it's shipping.

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