GCB-70 Manual Reset Circuit Breaker 70 Amp DC

Description

GCB-70. Manual Reset. 70 Amp. 42V DC Maximum. Type 3 Thermal Circuit Breaker. Surface Mount. Sold Individually.

The GCB-70 is a 70 Amp Type 3 manual reset circuit breaker rated to 42V DC maximum (30V DC UL approved) — suited to 12V and 24V DC automotive, marine, caravan, and 12V DC installations. Type 3 manual reset: when a fault trips the breaker, it stays open until the reset button is manually pressed — requiring deliberate operator action to restore power after a fault, rather than automatically retrying. Stud terminal connections. Surface mount bracket. Sold individually.

• GCB-70 — 70 Amp Manual Reset Circuit Breaker DC
• Current rating: 70 Amp
• Voltage rating: 42V DC maximum (30V DC UL approved) — suits 12V and 24V DC systems
• Type 3 manual reset — stays tripped until reset button is manually pressed
• Thermal trip mechanism — trips on overcurrent or short circuit
• Stud terminal connections — suits ring terminals and cable lugs
• Surface mount bracket — panel or chassis mount
• Thermoset plastic housing
• Suits: automotive, marine, caravan, RV, 4WD, solar, dual battery, winch circuits
• Sold individually

Available now — fast dispatch Australia-wide.

About the GCB-70 — Manual Reset vs Auto Reset Circuit Breakers

A circuit breaker provides resettable overcurrent protection — unlike a fuse which must be replaced after it blows, a circuit breaker can be reset and returned to service after the overcurrent condition is cleared. The GCB-70 is a Type 3 manual reset breaker — after tripping on an overcurrent condition, the breaker stays open and power remains off until the reset button on the breaker body is deliberately pressed. This requires the operator to physically attend the breaker, investigate the cause of the trip, and make a conscious decision to restore power.

Manual reset (Type 3) is the preferred choice for high-current circuits where automatic power restoration after a fault could cause damage or a safety hazard — winch circuits, battery main feeds, inverter inputs, solar charge controller outputs, and high-draw motor circuits where a repeated auto-reset cycle could cause overheating or fire. At 70 Amp, the GCB-70 is suited to the heavy circuits in Australian automotive, marine, and caravan installations where a resettable high-current protection device is required without the risk of automatic retry.

Q: What is the difference between Type 1, Type 2, and Type 3 circuit breakers?
A: Type 1 (auto reset) automatically resets and retries after tripping. Type 2 (modified reset) trips and stays open until power is cycled off and on. Type 3 (manual reset) trips and stays open until the reset button is manually pressed — the GCB-70 is Type 3. Select the type appropriate for the circuit application.

Q: Why use a manual reset breaker instead of a fuse at 70A?
A: A manual reset breaker can be reset without replacing any component — after identifying and correcting the fault, the breaker is reset with a button press and the circuit is restored immediately. A 70A fuse must be physically replaced after it blows, requiring a spare fuse to be on hand. In remote or off-road applications, a resettable breaker provides faster fault recovery.

Q: Is the GCB-70 sold individually?
A: Yes — the GCB-70 is sold individually.