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4 Pin 12v Heavy Duty 100a Relay
4 Pin 12v Heavy Duty 100a Relay
SKU:CVB-RELAY-HD-100A
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4 Pin 12v Heavy Duty 100a Relay
📝 4 Pin 12v Heavy Duty 100A Relay
This 12v heavy duty 100A relay is designed for high-current switching in campervan, caravan, automotive, and off-grid electrical systems. Built in Germany for reliability, it’s ideal for controlling power-hungry circuits like battery feeds, inverters, lighting systems, and auxiliary loads.
Featuring a 4-pin normally open configuration, this relay uses M6 threaded posts for high-current connections and 6.3mm spade terminals for the trigger circuit, ensuring strong, stable connections where it matters most.
⭐ Essential Benefits
• 100A switching capacity – ideal for high-current 12v applications.
• Heavy duty construction – designed for reliable performance under load.
• M6 power terminals – secure connection for large cables and high current flow.
• Standard 4-pin layout – simple integration into common relay circuits.
• Made in Germany – trusted manufacturing quality and durability.
⚙️ Functionality
This relay operates as a normally open (NO) switch, meaning power flows only when the relay is activated.
When 12v is applied across terminals 85 and 86, the internal coil energises, closing the circuit between 30 and 87. This allows high-current devices to be safely controlled by a low-current trigger circuit such as a switch, ignition source, or control module.
🔌 Compatibility
• Suitable for 12v DC systems.
• Ideal for campervans, caravans, 4WDs, and off-grid setups.
• Works with battery systems, inverters, lighting, compressors, and auxiliary circuits.
• Compatible with standard automotive relay wiring setups.
🧰 Installation Difficulty
🟡 3/5 (Moderate)
Requires correct wiring of both high-current and trigger circuits. Ensure proper cable sizing and secure mounting.
🔍 Features
• 4 pin relay (normally open).
• 2 × M6 threaded terminals (pins 30 & 87).
• 2 × 6.3mm male spade terminals (pins 85 & 86).
• Heavy duty 100A rating.
• Compact cube-style housing.
• Black casing.
• Manufactured in Germany.
📊 Specifications
| Specification | Value |
|---|---|
| Relay Type | Normally Open (NO) |
| Voltage | 12v |
| Current Rating | 100A |
| Pin Configuration | 4 Pin |
| Terminal Type (Power) | M6 threaded posts (30, 87) |
| Terminal Type (Trigger) | 6.3mm spade (85, 86) |
| Body Size | Approx 45mm × 45mm × 45mm |
| Overall Height | Approx 77mm (including mount and terminals) |
| Color | Black |
| Country of Manufacture | Germany |
📦 What’s Included
• 1 × 4 pin 12v 100A heavy duty relay
🙌 Why Choose This Product?
This relay is built for serious current handling, making it ideal for demanding 12v systems where reliability matters. The combination of high current capacity and solid terminal connections makes it a dependable choice for both DIY builds and professional installs.
🚀 Our Promise
Order today for same-day dispatch and explore our full range of off-grid electrical accessories.
Our Commitment
At Campervan Builders, our commitment is simple: we only supply quality campervan, caravan, motorhome, and RV parts that we’ve personally tested in real off-grid conditions. From interior LED lighting to Starlink 12V conversion kits, every product is chosen for reliability, durability, and ease of installation. We back this with fast shipping Australia-wide, friendly support, and honest advice to help DIY builders and professionals alike. When you shop with us, you’re choosing proven gear that keeps you connected and comfortable on every adventure.