20-150A Circuit Breaker Dual Battery IP67 Waterproof Fuse Manual Reset 12V 24V

A blown fuse on a dual battery circuit always seems to happen a long way from the nearest servo, and finding the right replacement in a dark toolbox is nobody's idea of fun. This manual-reset breaker does the same protective job, then goes back to work with a press of a button instead of a spare fuse.

Reset it instead of replacing it

The breaker opens the circuit when current climbs past its rating, protecting whatever sits downstream. Once the fault is cleared, the red button resets the circuit and you are back in business. That same button doubles as a manual isolator: press it and the circuit is dead, which is genuinely useful when you want to work on wiring, or park the vehicle for a month without the auxiliary side quietly draining. The supplier describes the housing as an alloy chosen for conductivity and for resistance to heat and pressure.

Ratings - read this before you order

Three different current ratings appear across this listing and they do not agree, so all three are published here rather than one being chosen for you. The product title gives a 20-150 A range. The Amperage options you can actually buy are 20 A, 30 A, 40 A, 50 A, 60 A and 150 A. The supplier's own description lists 20/30/40/50/60/80/100/150 A, which includes 80 A and 100 A - neither of which is available on this listing. Order by the option you select, and check that figure against your cable and your load.

Key features

• Manual reset: the red button restores the circuit after a trip, so there are no spare fuses to carry or lose.
• Doubles as an isolator: press to break the circuit for maintenance or long-term parking.
• Six ratings stocked: 20 A through to 150 A, covering everything from a light accessory feed to a heavy auxiliary run.
• Alloy housing: the supplier specifies an alloy body for conductivity and heat resistance.
• Named applications: the supplier lists car audio and large vehicle electrical circuits as its intended uses.

Specifications

• Current rating, per product title: 20-150 A
• Current rating, per purchasable options: 20 A, 30 A, 40 A, 50 A, 60 A, 150 A
• Current rating, per supplier description: 20 / 30 / 40 / 50 / 60 / 80 / 100 / 150 A
• Voltage (stated in product title only): 12 V and 24 V
• Ingress protection (stated in product title only): IP67
• Reset type: manual push button
• Material: alloy (supplier's wording)
• Stud / terminal size: not stated by the supplier
• Approvals or standards: none named by the supplier

What's in the box

• 1 x circuit breaker

Before you wire this in

• The breaker must be sized to the cable and to the load it protects, not to the battery. A breaker rated above what the cable can carry will let that cable overheat before it ever trips.
• The 80 A and 100 A ratings named in the supplier's text cannot be ordered here. Choose from the six Amperage options listed above.
• The 12 V / 24 V and IP67 figures appear in the product title only. The supplier's description does not repeat them, so treat both as unconfirmed.
• No standard, approval or certification is named by the supplier for this breaker, and nothing on this page should be read as a compliance claim.
• Stud and terminal dimensions are not published. Check the photographs against your cable lugs before ordering.
• Installation into a dual battery or other high-current circuit should be carried out by a qualified auto electrician.

Pick the rating that matches the circuit you are protecting - and if you are not certain what that is, ask your auto electrician before you order.