12V 40A Relays with Spade Terminals, Plastic Cover, 4-Pin, 12-Way Fuse Holder

Meet the 12V 40A Relays with Spade Terminals, Plastic Cover, 4-Pin, 12-Way Fuse Holder — a compact, rugged power distribution hub designed to simplify wiring for marine, caravan, RV, and automotive projects. Built with flame-retardant PC material and a waterproof connector, it keeps critical circuits organized and protected in harsh environments. The unit includes 4x 12V 40A relays, 12 fuses, and a sturdy 12-way fuse box that can be mounted quickly via two pre-moulded side holes, making installation clean and secure.

Benefits & Tips

• Consolidates multiple circuits into a single, organized fuse box with reliable relay protection for accessories like lighting, pumps, and infotainment systems.
• Ideal for demanding environments—marine, off-road, or RV setups—where moisture and vibration are common. The waterproof connector and flame-retardant housing help safeguard your electrical system.
• Practical tips: use the included 5A/10A/15A/20A fuses to tailor protection per circuit, monitor the red LED indicator to spot blown fuses quickly, and ensure total draw per circuit stays within 30A to avoid overload.

Product specifications

• Product name: 12-way fuse holder with relay, multi-way fuse box, automobile 4-way relay with fuse
• Type: Fuse holder / fuse box with 4x 12V 40A relays
• Purpose: To protect the safety of vehicle equipment
• Material: Flame-retardant PC (with waterproof connector)
• Dimensions (12-way): 138.25 × 85 × 36.5 mm
• Weight (12-way): 299 g
• Input rated voltage: 32V
Maximum voltage: 12–24V
• Maximum rated current: 100A total; 30A per circuit
• Fuse ratings included: 5A, 10A, 15A, 20A (3 pcs each)
• Relays included: 4 × 12V 40A relays with spade terminals
• Main terminals: M5 threaded stud; single terminals M4
• Indicator: Red LED indicates fuse/disconnection status
• Scope of installation: Suitable for cars, boats, RVs, buses, yachts, etc.
• Mounting: 2 pre-moulded holes on the side for easy securing
• Additional notes: 12-way version includes a full set of fuses and relays for immediate use

Package includes

• 1 × Relay Fuse Box
• 12 × fuses
• 4 × 4-pin 12V 40A relays

Warnings / Reminders

• Operate within 12–24V DC. Do not exceed the specified circuit current (30A per circuit) to prevent overheating.
• Ensure proper wiring and secure mounting before powering on. Use correct fuse ratings for each circuit.
• Keep the unit away from direct moisture and corrosive environments beyond its rated IP protection.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

At intercyprus.com since 2002 — trusted for quality and reliability.