OEX ACX3213 300A Distribution Block 4 Terminals Red

300A Single-Rail Distribution Block for Centralised Positive Supply Distribution

Product Overview

The OEX ACX3213 is a 300A single-rail distribution block in red, featuring four M10 stainless steel stud terminals on a tin plated copper bus bar, with a nylon base and clear protective cover. It is the direct red positive counterpart to the black ACX3212 using the two together gives a clean, colour-coded positive and negative distribution pair for a professional installation.

As a single-rail block, all four terminals share a common positive bus, making it suited to distributing a main positive supply feed out to multiple circuits driving lights, compressors, inverters, DC-DC chargers, and other high-current accessories from a central point. The tin plated copper bus bar ensures low-resistance distribution, while stainless steel terminals and nuts provide long-term corrosion resistance. The clear cover protects the connections and allows visual inspection without disassembly. Rated at 300A continuous and up to 48V DC, it suits 12V, 24V, and 48V DC systems.

Features & Benefits

• 300A maximum continuous rating — high-current single-rail distribution for main positive supply circuits
• 4 x M10 stainless steel stud terminals — accepts M10-compatible ring terminals; corrosion-resistant studs and nuts for long-term reliability
• Tin plated copper bus bar — low-resistance current distribution across all four terminals for efficient power transfer
• Nylon base with clear cover — electrically insulating base, clear cover protects terminals while allowing visual inspection without disassembly
• 48V DC maximum operating voltage — compatible with 12V, 24V, and 48V DC systems including lithium and solar storage installations
• Red — standard colour for positive/supply distribution per automotive convention
• Pairs with ACX3212 — use the black ACX3212 as the matching negative/earth distribution block for a complete colour-coded pair

Technical Specs

Compatible With

Suitable for single-rail positive supply distribution in:

• 12V, 24V, and 48V DC automotive, marine, and caravan electrical systems
• Dedicated positive supply distribution rails in dual battery and auxiliary power installations
• Solar, inverter, and lithium battery system positive distribution panels
• Multi-circuit accessory wiring systems requiring organised positive supply consolidation

Goes Well With

• OEX ACX3212 — 300A Distribution Block Black (matching negative/earth counterpart)
• OEX ACX3057 — Ring Crimp Terminal 10.5mm ID Blue (suits M10 stud)
• OEX ACX3057BL — Ring Crimp Terminal 10.5mm ID Blue Pack of 14
• OEX ACX3160 — 400A Combined Red/Black Bus Bar Box (for combined positive and negative in one unit)

Weight

Confirm with supplier.

Frequently Asked Questions

What is this distribution block used for?

The ACX3213 is a single-rail positive supply distribution block. It accepts one or more incoming positive supply feeds and distributes the current across up to four output circuits via the M10 studs. This consolidates multiple positive connections into one neat, organised point rather than running individual cables back to the battery or isolator.

What is the difference between this and the bus bar boxes (ACX3160, ACX3162)?

The ACX3213 is a single-polarity block — all four terminals are on the same positive bus. The ACX3160 and ACX3162 are combined units with both a red positive rail and a black negative rail in one enclosure. Choose the ACX3213 (paired with ACX3212) when you want separate, dedicated positive and negative blocks; choose the bus bar boxes when you want both rails combined in one unit.

What ring terminal size suits the M10 studs?

The M10 studs are 10mm in nominal diameter and require ring terminals with a 10.5mm or larger ID hole. The OEX ACX3057 (10.5mm ID, blue) and ACX3057BL (pack of 14) are suitable options. Always confirm the ring terminal ID matches the stud diameter before purchasing.

What does the clear cover do?

The clear cover protects the bus bar and terminal connections from accidental contact, dust, and moisture while allowing visual inspection of the connection quality without needing to remove it — particularly useful in enclosed panel installations where periodic checks are needed.

Is a matching black earth distribution block available?

Yes. The OEX ACX3212 is the black negative/earth counterpart to this red positive block — identical in specification and designed to be used as a matched pair for a professional, colour-coded positive and negative distribution installation.