OEX ACX1842 Circuit Breaker Manual Reset 30A

OEX ACX1842 30A Manual Reset Circuit Breaker IP67 Waterproof Stainless Steel 8mm Studs 12V and 24V

The OEX ACX1842 is a 30A manual reset circuit breaker designed for reliable, resettable overcurrent protection on individual circuits in automotive, marine, caravan, 4WD, agricultural and commercial vehicle applications. Unlike blade fuses that must be replaced after a single overcurrent event, the ACX1842 trips and resets repeatedly, eliminating the need to carry spare fuses for protected circuits. IP67 waterproof and dust-resistant. Stainless steel 8mm studs with rubber protective caps. ISO 9001 certified. Covered by a one year warranty.

Product overview

A manual reset circuit breaker trips when current exceeds the rated threshold and holds the circuit open until the operator deliberately resets it. This is the preferred approach for winch, compressor, pump and motor circuits where automatic re-energisation after a fault could cause equipment damage or a safety hazard the manual reset ensures the fault is identified and resolved before the circuit is restored. For circuits where a blown fuse would be inconvenient or difficult to replace in the field, a resettable circuit breaker eliminates the need to carry spare fuses entirely.

The IP67 housing provides complete dust exclusion and protection against temporary water immersion, suited to external, underbonnet, deck-mounted and exposed off-road installations. The stainless steel 8mm studs with rubber protective caps provide corrosion-resistant, high-current connection points compatible with standard cable lugs across a range of wire gauges. At 75x40x50mm the ACX1842 suits tight installations including engine bays, chassis rails and compact electrical enclosures. ISO 9001 certified manufacturing at OEX's Brisbane facility ensures consistent quality.

Features and benefits

Manual reset: Requires deliberate operator action to restore the circuit after a trip, ensuring the fault is identified before re-energising. Preferred for winch, compressor, pump and motor circuits where automatic re-energisation could cause damage or a safety hazard.

Resettable no consumables: Trips and resets repeatedly without replacement, eliminating the need to carry spare fuses for protected circuits.

IP67 waterproof and dust-resistant: Complete dust exclusion and temporary water immersion rated, suited to external, underbonnet, deck-mounted and off-road installations.

Stainless steel 8mm studs: Corrosion-resistant high-current connection points compatible with standard cable lugs across a range of wire gauges.

Rubber stud caps: Protect terminal connections from moisture, contamination and accidental short circuit.

Compact 75x40x50mm: Suits tight installations including engine bays, chassis rails, underbonnet panels and compact electrical enclosures.

12V and 24V compatible: Suits both 12V and 24V vehicle electrical systems.

ISO 9001 certified: Manufactured under ISO 9001 quality management with in-house testing at OEX's Brisbane facility.

One year warranty: Covered by a one year OEX warranty.

Technical specs

Frequently asked questions

What is the difference between manual reset and automatic reset? A manual reset circuit breaker requires a deliberate operator action to restore the circuit after a trip. An automatic reset breaker re-energises automatically once it cools. Manual reset is preferred for winch, compressor, pump and motor circuits where automatic re-energisation after a fault could cause equipment damage or a safety hazard.

What wire gauge suits a 30A circuit breaker? A minimum of 4mm² (approximately 11AWG or 12 B&S) automotive grade cable is typically recommended for runs up to approximately 5 metres at 30A continuous. For longer runs or high-duty-cycle applications, upsize to 6mm² to reduce voltage drop.

Is this suitable for marine deck installation? Yes. IP67 rated for complete dust exclusion and temporary immersion. For permanent marine deck installations, apply marine-grade sealant around the mounting surface and seal cable entry points.

Where should this be installed in the circuit? As close as practical to the power source ideally within 300mm of the battery terminal or distribution point to minimise the length of unprotected cable between the battery and the breaker.

Can this circuit breaker be used in both 12V and 24V systems? Yes. The ACX1842 is compatible with both 12V and 24V vehicle electrical systems, suited to light vehicles, heavy commercial vehicles and marine applications across both voltage platforms.