OEX ACX3215 4 Way Distribution Block

OEX ACX3215 4 Way Distribution Block

Distribute high-current power from a single heavy-gauge source to multiple outputs with the OEX ACX3215 4 Way Distribution Block — featuring 1 x 0 B&S (AWG) gauge input, 3 x 4 B&S (AWG) gauge outputs, 300A continuous amperage rating, and durable zinc alloy nickel-plated construction for reliable, long-term performance in automotive, marine, 4WD, caravan, RV, and industrial high-current power distribution applications.

Product Overview

The OEX ACX3215 is a purpose-built 4-way power distribution block designed to split a single large-gauge cable feed into three smaller-gauge outputs — a common requirement in high-current automotive and marine electrical installations where a single heavy-gauge cable from a battery, busbar, or fuse block needs to be distributed cleanly to multiple devices or circuits. The fixed input/output configuration of 1 x 0 B&S input and 3 x 4 B&S outputs mirrors real-world installation scenarios where a 0 B&S main feed cable — commonly used for large inverters, dual battery systems, high-powered amplifier main feeds, or heavy accessory circuits — needs to be split to three separate 4 B&S output runs serving individual amplifiers, DC-DC chargers, accessory circuits, or sub-distribution points. Rated to 300A continuous, the ACX3215 comfortably handles the combined current draw of the three output circuits without thermal stress or voltage drop concerns at the distribution point. Zinc alloy construction with nickel plating provides a robust, corrosion-resistant housing that withstands the vibration, temperature cycling, and environmental exposure common in automotive, marine, and off-road applications. ISO 9001-certified manufacturing and in-house product testing at OEX's Brisbane facility ensures consistent quality and reliability across every unit, backed by OEX's reputation for durability since 1997.

Features & Benefits

1 x 0 B&S Input / 3 x 4 B&S Output Configuration: Dedicated input and output sizing eliminates guesswork during installation — the single 0 B&S input accommodates the heavy-gauge main feed cable while the three 4 B&S outputs connect directly to individual device or circuit cables without requiring additional adaptors or reducers.

300A Continuous Amperage Rating: Rated to 300A continuous current, the ACX3215 handles the combined load of three 4 B&S output circuits simultaneously without thermal stress at the distribution point — suitable for high-powered car audio systems, large inverter feeds, dual battery auxiliary circuits, and heavy-duty 4WD and marine electrical setups.

Zinc Alloy with Nickel Plating: Zinc alloy construction provides a rigid, vibration-resistant housing while nickel plating delivers excellent corrosion resistance and long-term surface durability — maintaining appearance and electrical integrity in humid, marine, and harsh outdoor environments common in Australian automotive and off-road applications.

Clean Power Distribution Without a Busbar: The ACX3215 provides a compact, self-contained distribution point that avoids the need for a separate busbar in simpler three-output installations — reducing component count, simplifying wiring, and keeping the electrical installation neat and organised in tight spaces.

ISO 9001 Certified Manufacturing: Produced under ISO 9001 quality management certification with in-house product testing at OEX's Brisbane facility, ensuring every unit meets stringent engineering and quality control procedures for reliability in automotive, marine, mining, RV, and industrial applications.

Technical Specs

Compatible With / Goes Well With

The OEX ACX3215 suits 12V and 24V automotive, marine, caravan, RV, 4WD, and commercial vehicle electrical systems requiring 300A-rated power distribution from a 0 B&S main feed to three 4 B&S output circuits. Ideal for high-powered car audio amplifier installations distributing power from a single main run, dual battery auxiliary systems, large inverter sub-distribution, 4WD accessory circuit splits, and marine high-current distribution panels. Compatible with 0 B&S cable lugs on the input and 4 B&S cable lugs on each output. Pairs well with OEX ANL fuse holders, distribution blocks, and battery terminals for a complete high-current power management solution.

Frequently Asked Questions

What does the 1 x 0 B&S input and 3 x 4 B&S output configuration mean?

The ACX3215 accepts a single heavy-gauge 0 B&S (approximately 53mm²) input cable — typically the main power feed from a battery, busbar, or fuse block — and splits it into three separate 4 B&S (approximately 21mm²) output cables. Each output then runs to an individual device or circuit. This configuration is common in high-powered car audio installations, dual battery systems, and 4WD accessory setups where one main feed needs to service multiple high-current devices.

What is the maximum continuous current the ACX3215 can handle?

The ACX3215 is rated to 300A continuous amperage — representing the combined total current across all three output circuits simultaneously. Individual circuit current draws should be matched to appropriate wire gauges and fusing on each 4 B&S output run to ensure safe operation and circuit protection.

Does the ACX3215 include fusing or circuit protection?

No — the ACX3215 is a passive distribution block only and does not include built-in fusing or circuit protection. Each output circuit should be individually fused as close to the distribution block as practical, and the main input feed should be protected with an appropriately rated fuse or ANL fuse holder close to the battery or power source.

What is the difference between the ACX3215 and the OEX ACX3210/ACX3212 distribution blocks?

The ACX3215 features a fixed input/output gauge configuration (0 B&S input, 4 B&S outputs) designed for specific cable size combinations common in high-current installations, while the ACX3210 and ACX3212 use stud-type terminals (M8 and M10 respectively) that accept any cable lug size within their current rating. Choose the ACX3215 when your installation specifically uses 0 B&S input and 4 B&S output cables; choose the ACX3210 or ACX3212 when you need flexibility in cable gauge or require different output combinations.

Is the ACX3215 suitable for marine and outdoor use?

The nickel-plated zinc alloy construction provides good corrosion resistance for marine, outdoor, and under-bonnet applications. For direct marine deck installations or prolonged submersion environments, install in a protected location and ensure connections are properly sealed and terminated with tinned copper cable lugs for maximum corrosion resistance at the connection points.