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Voltage Sensitive Relay (VSR) / Automatic Charging Relay 125A

Cat.No:  84394

Availability: In stock

our price $49.90
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Voltage Sensitive Relay (VSR) / Automatic Charging Relay.


  • Automatically combines two batteries when charging and isolates the two batteries when not charging.
  • No voltage drops comparing to battery isolator diodes (0.6V).
  • Dimensions fits Heavy Duty Modular Fuse Box Series (BF43x) and Battery Switch, matching mainstream products in market (BEP style)
  • Robust Glass Fiber reinforced Nylon enclosure
  • Built-in LED indication (ON when VSR engages)
  • Port for remote LED indicating VSR status (LED not included)
  • Surface or panel mount options provides flexibility when installing
  • Optional Storage Mode allows zero power consumption when engine is off.


  • Nominal Voltage: DC 12V
  • Combine / Open Voltage: DC 13.3V / 12.8V
  • Continuous Current Rating: 125A
  • Intermittent Current Rating: 140A
  • Power Consumption: 10mA (Standby) / 330mA (Engage) / 0mA (Storage Mode)
  • Certification:  IP67

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