OEX ACX1844 Type III Heavy Duty Manual Reset Circuit Breaker 60A

OEX ACX1844 Type III Heavy Duty Manual Reset Circuit Breaker 60A

Safeguard high-current electrical circuits with the OEX ACX1844 Type III 60A heavy duty manual reset circuit breaker featuring IP67 waterproof and dustproof housing for the most demanding installation environments, stainless steel 9.5mm terminal studs for robust high-current cable terminations, switchable manual reset operation for controlled fault recovery and circuit isolation, 72VDC maximum voltage rating for compatibility across 12V, 24V, and 48V systems, rubber stud caps for terminal protection, and OEX ISO 9001 certified manufacturing quality tested in Brisbane for harsh Australian automotive, marine, and industrial conditions.

Product Overview

The OEX ACX1844 is a professional-grade Type III heavy duty 60-amp manual reset circuit breaker purpose-built to protect high-current circuits in automotive, marine, caravan, 4WD, and industrial applications where a standard fuse or lighter-duty breaker would be insufficient. The 60 amp continuous current rating positions the ACX1844 as the ideal protection device for demanding loads including winches, high-draw compressors, inverters, refrigeration units, electric anchor systems, and multi-circuit distribution feeds requiring robust overcurrent protection without the recurring cost of fuse replacement. Rated to 72VDC, the ACX1844 delivers genuine multi-voltage system compatibility — covering 12V passenger and light commercial vehicles, 24V trucks and heavy equipment, and 48V specialist and lithium battery systems — making it one of the most versatile circuit breakers in the OEX range. The IP67 waterproof and dustproof housing rating means the ACX1844 is certified for complete protection against dust ingress and temporary submersion up to one metre, enabling confident installation in bilge areas, under-bonnet locations, exposed deck mounts, and outdoor equipment panels subject to high-pressure wash-down or immersion. The switchable function adds an important operational advantage over standard manual reset breakers — the ACX1844 can be toggled off to isolate a circuit without requiring a fault event, effectively functioning as both a circuit breaker and an on/off isolation switch for the protected circuit. Larger 9.5mm stainless steel terminal studs accommodate heavier cable gauges appropriate to the 60A rating, providing secure, low-resistance, corrosion-resistant terminations suitable for long-term service in marine, coastal, and high-vibration environments.

Features & Benefits

60A Type III Heavy Duty Manual Reset — Handles demanding high-current loads including winches, compressors, and inverters with manual reset recovery after fault resolution, eliminating the need for fuse replacement in the field.

Switchable Operation — Doubles as a circuit isolation switch, allowing the protected circuit to be manually turned on or off independently of fault events — ideal for auxiliary systems requiring deliberate operator control.

IP67 Waterproof & Dustproof Housing — Certified protection against complete dust ingress and temporary submersion up to 1 metre, enabling installation in bilges, exposed deck positions, engine bays, and equipment subject to wash-down.

Stainless Steel 9.5mm Terminal Studs — Heavy-gauge stainless studs accommodate large cable terminal lugs appropriate for 60A circuits, providing corrosion-resistant, high-strength termination points for long-term reliability in harsh environments.

Up to 72VDC Voltage Rating — Genuine multi-system compatibility covering 12V, 24V, and 48V DC installations without requiring a voltage-specific variant — ideal for lithium battery systems and specialist equipment operating above standard automotive voltages.

Rubber Stud Caps — Protect exposed terminal studs from accidental contact, moisture, and corrosion when not connected, maintaining terminal integrity and electrical safety throughout the product's service life.

Technical Specs

Compatible With / Goes Well With

The OEX ACX1844 is compatible with 12V, 24V, and 48V DC electrical systems across passenger vehicles, 4WD and off-road vehicles, light and heavy commercial vehicles, caravans, motorhomes, marine vessels, and industrial mobile equipment. Well suited to protecting winch circuits, high-draw air compressors, inverters up to approximately 720W (12V) or 1440W (24V), electric anchor windlasses, refrigeration compressors, and high-current accessory feeds. Pairs well with OEX distribution blocks (ACX3210, ACX3212, ACX3215), OEX ANL fuse holders and inline fuse assemblies, OEX busbars and terminal studs, OEX Anderson plug assemblies, and OEX wiring and cable accessories for complete circuit protection and power distribution system builds.

Frequently Asked Questions

What does "switchable" mean on the ACX1844 and how does it differ from a standard manual reset breaker?

A switchable circuit breaker like the ACX1844 can be manually toggled between on and off positions independently of any fault event — functioning as both a circuit breaker and an isolation switch for the protected circuit. A standard manual reset breaker can only be reset after tripping due to an overcurrent condition and cannot be deliberately switched off under normal operating conditions. The switchable function on the ACX1844 makes it ideal for auxiliary systems such as winches, compressors, or refrigerators where the operator may need to deliberately isolate the circuit without requiring a fault to occur.

What is an IP67 rating and why does it matter for circuit breaker installation?

IP67 is an Ingress Protection rating certifying that the ACX1844's housing is completely dust-tight and protected against temporary immersion in water up to 1 metre depth for up to 30 minutes. For circuit breaker installations, this means the ACX1844 can be mounted in bilge areas, exposed marine deck positions, under-bonnet engine bays, and outdoor equipment panels subject to high-pressure wash-down, heavy rain, or temporary flooding without risk of water ingress compromising the internal mechanism or causing electrical faults.

What cable size should I use with the ACX1844 for a 60A circuit?

For a 60A circuit using the ACX1844, a minimum cable size of 10mm² (approximately 8 AWG) is recommended for short cable runs, with 16mm² (approximately 6 AWG) recommended for runs exceeding 3 metres or where voltage drop minimisation is critical — such as winch or compressor circuits. The 9.5mm stainless steel studs accommodate large cable terminal lugs suitable for these heavier gauges. Always size the cable to the actual current draw of the connected load and the run length, and use correctly crimped or soldered cable lugs for a secure, low-resistance termination.

Can I use the ACX1844 on a 48V lithium battery system?

Yes. The 72VDC maximum voltage rating of the ACX1844 makes it fully compatible with 48V lithium battery systems, including lithium iron phosphate (LiFePO4) banks which can reach charge voltages of up to 58.4V at full charge. This 72V rating provides a comfortable safety margin above the maximum operating voltage of 48V lithium systems, making the ACX1844 one of the few circuit breakers in the OEX range genuinely suitable for modern high-voltage lithium energy storage installations in caravans, motorhomes, and off-grid setups.

How does the ACX1844 Type III compare to the OEX ACX1842 Manual Reset Circuit Breaker?

The ACX1844 is a heavier-duty product in every respect compared to the ACX1842. The ACX1844 is rated at 60A versus 30A, features larger 9.5mm terminal studs versus 8mm, is rated to 72VDC versus standard 12V/24V systems, carries a full IP67 waterproof certification, and includes switchable isolation functionality not present on the ACX1842. The ACX1842 suits medium-current auxiliary circuits up to 30A, while the ACX1844 is designed for high-current applications including winches, compressors, inverters, and multi-circuit feeds in demanding automotive, marine, and industrial environments.