Eaton 285120F 120 Amp Thermal Circuit Breaker, Surface Mount

This 120 amp Eaton thermal circuit breaker is a resettable alternative to a fuse, ideal for protecting batteries and high-power charge controllers. Every positive line between a component and your battery bank should have a fuse or breaker on it to stop a short circuit before it causes damage — a resettable breaker means you're not stuck without a spare on hand when it trips, which matters most in off-grid installations where replacement fuses aren't around the corner.

Key Specs:

• Rating: 120 Amps
• Type: Thermal circuit breaker, surface mount
• Dimensions: 3.2 x 1.9 x 1.22 in.
• Weight: 0.5 lb

Size the breaker to match your cable's ampacity and the component it's protecting, and mount it as close to the battery as practical.