TBS Electronics 5074410 DCM 12V 500A Battery Protect Relay

TBS Electronics DCM Smart Battery Protect Relay — 12V / 500A

The TBS Electronics 5074410 is a commercial-grade 12V 500A smart battery protection relay designed to automatically disconnect battery banks from non-essential loads before complete discharge occurs, or isolate charging sources during over-voltage events. Engineered for heavy-duty marine and commercial vessel DC distribution networks, it uses a bi-stable magnetic latching contact system to achieve near-zero power consumption in both the "ON" and "OFF" operational states.

The DCM unit constantly monitors battery health via internal microprocessors, providing automated low-voltage disconnect (LVD), high-voltage disconnect (HVD), and manual override features via remote switches or CAN bus control modules. Its high continuous amperage handling (500A) and massive surge capacity make it ideal for protecting lithium (LiFePO₄) and lead-acid house battery banks from catastrophic over-discharge or cell damage.

Key Features

• Bi-Stable Magnetic Latching: Uses energy only during contact state transitions, drawing near-zero control current (< 0.1 mA) in steady "ON" or "OFF" positions.

• Smart Voltage Monitoring: Integrated microprocessor triggers automated disconnects based on customizable low-voltage and high-voltage thresholds.

• 500A Continuous Rating: Heavy-duty copper busbars and internal contacts sustain 500A continuous load current and 1500A peak surges.

• Lithium (LiFePO4) Ready: Acts as a rapid-response primary safety disconnect relay for Lithium Battery Management Systems (BMS).

• Manual Override Capability: Features an integrated mechanical control knob on top of the relay for emergency manual force-on or force-off operation.

Specifications