OEX ACX3220 600V 50A Modular Bus Block 6 Row

OEX ACX3220 600V 50A Modular Bus Block 6 Row

Simplify and organise complex electrical wiring with the OEX ACX3220 Modular Bus Block — featuring 6 rows of tinned copper terminals rated to 600V and 50A per row, 16mm pitch spacing for clear wire separation, modular and connectable design enabling side-by-side expansion to any circuit count required, steel/nickel-plated screws for reliable long-term connections, and heat-resistant plastic housing built for automotive, marine, RV, industrial, and mining electrical installations. Compact 124 x 45 x 30mm footprint fits neatly into junction boxes, control panels, and electrical enclosures.

Product Overview

The OEX ACX3220 is a professional-grade 6-row modular bus block designed for organising and distributing multiple individual circuits in automotive, marine, caravan, RV, mining, industrial, and commercial vehicle electrical systems. Unlike distribution blocks that share a common bus bar across all terminals, the ACX3220 provides six electrically independent terminal rows — each rated to 600V and 50A — allowing multiple separate circuits to be neatly terminated, joined, or distributed from a single organised panel-mount component. This makes the ACX3220 ideal for junction boxes, fuse panel feeds, multi-circuit control panels, switchboard wiring, trailer junction points, auxiliary circuit organisation, and any application where individual circuits need clean, accessible termination points rather than a shared power distribution arrangement. The 16mm pitch between each terminal row provides adequate spacing for clear cable identification, labelling, and maintenance access — preventing accidental cross-connection and simplifying fault-finding in complex multi-circuit installations. Tinned copper terminals ensure excellent conductivity with long-term corrosion resistance, while the steel/nickel-plated screws provide reliable clamping force that resists loosening from vibration common in mobile applications. The heat-resistant plastic housing withstands elevated temperatures generated by sustained current loads and ambient heat in engine bays, underbody enclosures, and industrial equipment environments. The modular and connectable design is the ACX3220's key advantage for scalable installations — multiple units can be connected side by side to create a custom bus block of any width, allowing the electrical system to grow alongside the application without replacing existing hardware. ISO 9001-certified manufacturing and in-house product testing at OEX's Brisbane facility ensures consistent quality across every unit.

Features & Benefits

600V / 50A Rating Per Row for Versatile Applications: Each of the six terminal rows is independently rated to 600V and 50A, providing substantial capacity for automotive 12V/24V circuits, marine electrical systems, caravan power management, industrial control wiring, and commercial vehicle auxiliary circuits — well within the voltage and current demands of typical multi-circuit electrical installations.

Modular and Connectable Design for Scalable Installations: The ACX3220 connects side by side with additional units of the same series, allowing the bus block to be expanded to any number of rows required for the application. Start with a 6-row block and add more as the system grows — no need to replace existing wiring or hardware when expanding an electrical installation.

6 Independent Terminal Rows for Circuit Separation: Each of the six rows is electrically independent, making the ACX3220 suitable for applications requiring individual circuit termination rather than shared power distribution — junction boxes, multi-circuit panels, trailer wiring centres, and switchboard feeds where circuit isolation is essential.

16mm Pitch Spacing for Clear Identification and Access: Generous 16mm spacing between terminal rows allows for clear cable routing, individual circuit labelling, and easy maintenance access — reducing errors during installation and simplifying fault-finding in multi-circuit systems where circuit identification is critical.

Tinned Copper Terminals for Conductivity and Corrosion Resistance: Tinned copper terminal construction provides excellent electrical conductivity combined with long-term resistance to oxidation and corrosion in humid, marine, and outdoor environments — maintaining reliable low-resistance connections over years of service.

Steel/Nickel-Plated Screws for Reliable Long-Term Clamping: Heavy-duty steel/nickel-plated terminal screws provide strong, vibration-resistant clamping force that maintains secure wire connections in mobile applications subject to road vibration, mechanical shock, and thermal cycling.

Heat-Resistant Plastic Housing for Demanding Environments: The heat-resistant plastic housing withstands elevated operating temperatures from sustained current loads and high-temperature installation environments including engine bays, equipment enclosures, and industrial control panels — maintaining structural integrity and electrical isolation under demanding thermal conditions.

Compact 124 x 45 x 30mm Footprint: The compact form factor fits neatly into standard junction boxes, DIN rail enclosures, equipment cabinets, and custom control panels — maximising the use of available space while accommodating up to 6 independent circuit terminations in a single organised component.

Technical Specs

Compatible With / Goes Well With

The OEX ACX3220 is suited to 12V, 24V, and 48V automotive, marine, caravan, RV, mining, industrial, and commercial vehicle electrical systems requiring organised multi-circuit termination. Ideal for junction boxes, auxiliary fuse panel feeds, trailer wiring centres, multi-circuit control panels, switchboard builds, caravan power management panels, and commercial vehicle electrical enclosures. Connectable with additional ACX3220 units for expandable bus block configurations. Compatible with standard automotive, marine, and industrial wire gauges suitable for circuits up to 50A per row. Pairs well with OEX distribution blocks, fuse holders, and circuit protection products for complete electrical system organisation.

Frequently Asked Questions

Are the six terminal rows on the ACX3220 electrically independent or connected to a shared bus?

Each of the six terminal rows on the ACX3220 is electrically independent — this is a terminal block for individual circuit termination, not a shared power distribution block. Each row provides an isolated termination point for a separate circuit, making it suitable for junction boxes, multi-circuit panels, and wiring centres where circuit separation is required.

Can multiple ACX3220 units be connected together to create a larger bus block?

Yes. The ACX3220 features a modular and connectable design allowing multiple units to be joined side by side to create a bus block with any number of rows required. This makes the ACX3220 ideal for scalable installations where the circuit count may grow over time without requiring replacement of existing hardware.

What wire gauges are compatible with the ACX3220 terminal screws?

The ACX3220 accommodates wire gauges suitable for circuits up to 50A — typically 6mm² to 10mm² (approximately 10AWG to 8AWG) for near maximum-rated circuits, with smaller gauges suitable for lower-current applications. Always match wire gauge to the actual current draw of each individual circuit for safe and reliable operation.

Is the ACX3220 suitable for 12V and 24V automotive and marine applications?

Yes. With a 600V rating, the ACX3220 is suitable for all standard automotive (12V), marine (12V/24V), caravan (12V), and commercial vehicle (24V) electrical systems — the 600V rating provides a substantial safety margin above the operating voltages common in these applications, making it equally suitable for industrial and mining mobile equipment.

Can the ACX3220 be mounted on a DIN rail or in a standard junction box?

The compact 124 x 45 x 30mm dimensions make the ACX3220 compatible with standard automotive and industrial junction boxes and electrical enclosures. Many modular terminal blocks of this pitch and style are also compatible with standard DIN rail mounting clips — check fitment with your specific enclosure or DIN rail hardware to confirm compatibility for your installation.