Low-Voltage DC Vehicle Accessory Circuits
Automotive Relays & Fuse Boxes
DAIER offers automotive relays, fuse and relay box kits, and pre-wired assemblies for low-voltage DC accessory circuits. The range mainly covers 12V products, with other voltage options available on specific models. Browse the models below or send your part number and quantity for a quotation.
- Product range Relays & fuse boxes
- Assembly options Enclosures, kits & pre-wired
- Relay connections 4-pin & 5-pin models
- System voltage Mainly 12V DC; model-specific
Relay & Fuse Box Models
WM686 12V 120A/200A 4Pin Remote Control Car Starter Relay Isolator Disconnect Battery Switch
12V 120A/200A 4Pin remote control car starter relay isolator disconnect Battery switch includes battery clip accessories with one or two locks.
WM686-250A 250A 12V Anti-Theft Disconnect Remote Battery Kill Switch Kit for Car
The 250A 12V anti-theft disconnect remote battery kill switch kit for cars boasts a heavy-duty design, negative installation for enhanced safety, and convenient remote control with two paired fobs.
KH180 Series 12V 120A/200A 4Pin Automotive Relay
The automotive relay is a 4-pin relay, Nominal Voltage(VDC): 12V, Max Applicable Voltage (VDC): 15.6V, and Switching Current: 120A / 200A.
9038 Fuel Pump Relay Bypass Master Kit – Diagnostic Tester Scan Tool & Switch – Replaces 9036, 9037
This 9038 fuel pump relay bypass master kit is an essential diagnostic tool for automotive workshops, providing six distinct switches (replacing types 9036, 9037) to bypass and test a wide array of relays with multiple amperage…
JD1912-FAN1 12V 40A Electric Cooling Fan Relay Wiring Harness Kit with Thermostat Switch 185 On 175 Off
This 12V 40A electric cooling fan relay kit features a 3/8" NPT temperature switch activating at 185°F (off at 175°F), a 20A fuse, and a 35" pre-wired harness with 14AWG power wires for robust performance.
WKQ-175-185 3/8″ NPT Fan Thermostat Temperature Switch 185 ON / 175 OFF Engine Coolant Fan Sensor for 10″ 12″ 14″ 16″ Fan
This 3/8" NPT fan thermostat temperature switch, activating cooling fans at 185°F and deactivating at 175°F, is compatible with various 10-16 inch fans and a wide range of popular engines.
JD1914-W12V Automotive Waterproof Heavy Duty 5Pin SPDT 30/40A 12V Pre-wired Car Relay with Built-in Diode
The waterproof 5Pin 30/40A pre-wired car relay is rated for normal open 40A, normal closed 30A in 12V DC, SPDT and 5 Pin with built-in diode
JD1914-2 12V 30A ON/OFF 4 Pin SPST Relay
The SPST relay is a 4Pin 12V 40A relay with a 30A fuse DC SPST fused relay normally open 1NO for car, motor and automobile.
JD1912-W12V Waterproof 30A/40A SPDT 4Pin 12V Relay with 14 AWG Harness Socket
This waterproof 4-pin SPDT 30A/40A 12V relay with harness socket offers easy wiring with color-coded, tinned wires, a secure interlocking design, and durable construction perfect for automotive, marine, and outdoor applications.
JD1213 12VDC 40A 4-Pin or 5-Pin Relay Kits with Wired Socket
The 12VDC 40A 4-Pin or 5-Pin relay kits feature a secure interlocking design with insulated label wires for safe and convenient accessory wiring.
CRT-707 Automotive Relay Tester for 12 Volt 4 and 5 Pin Relays with LED Indicator
This automotive relay tester is a diagnostic tool designed to provide a quick and reliable method for testing the functionality of common 12-volt, 4-pin and 5-pin automotive relays.
Product range
Relays, Box Kits & Pre-Wired Assemblies
This range brings together individual automotive relays, fuse and relay boxes, and wiring assemblies for low-voltage DC accessory circuits. The supply format varies by model, from a relay or enclosure kit to an assembly with relays, fuses and wiring.
Individual Relays & Socket Kits
Individual relays provide switching for a single circuit. Socket and wiring kits provide the connection components for installation. The range includes 4-pin and 5-pin models; check the terminal diagram, coil voltage and contact load rating for the exact part number.
Fuse & Relay Box Kits
Box kits group relay and fuse positions in one enclosure for organized accessory wiring. Some models include terminals only, while others also include relays and fuses. Check the included components, slot layout and mounting dimensions before ordering.
Pre-Wired Assemblies
Pre-wired versions include wiring for the stated configuration and reduce harness assembly work. Compare circuit functions, wire sizes, cable lengths and connectors against your project requirements. Included relays, fuses and other components vary by model.
Voltage & Order Requirements
Most products in this range are for 12V DC accessory circuits, while some controllers have other operating ranges. Coil voltage and contact load ratings are separate specifications. Check model-specific electrical ratings and enclosure protection rather than applying one rating to the whole range.
For a production enquiry, send the part number and required quantity. If you need a different wiring arrangement, include the DC system voltage, loads per circuit, circuit diagram, cable lengths and connectors so the sales team can review an existing model or an OEM configuration.
Applications
Typical Relay Applications
Relay assemblies support accessory switching and organized circuit wiring. Match each model to the electrical loads and installation conditions of the project.
Vehicle Accessories
Control lighting, fans and other auxiliary loads with individual relays or multi-circuit fuse relay boxes.
RV & Service Vehicles
Group accessory circuits in a compact assembly with a wiring layout that supports installation and maintenance.
OEM Harness Assemblies
Specify relay and fuse positions, cables and connectors for repeatable vehicle or equipment wiring.
Common questions
Relay FAQs
Answers about box configurations, wiring, ratings and quotation requirements.
For a project enquiry
Send a part number and quantity, or share your circuit layout and wiring requirements.
Send project detailsAn enclosure or terminal kit is intended for your own wiring assembly. A kit may also include relays and fuses. Pre-wired versions include an assembled harness; included components and wire specifications depend on the model.
No. Most products in this range are for 12V DC circuits, but some controllers have different operating ranges. Check each model. For individual relays, confirm both the coil voltage and the contact load rating. Fuse limits, wires and connectors also affect the complete assembly; one relay rating is not the total current rating of a box.
No. Protection depends on the enclosure, seals, connectors and installation. Use the stated specification for the exact model and tell us if the assembly will be exposed to water or dust.
Yes. Send a wiring diagram or describe the relay and fuse positions, cable lengths, connectors and required quantity. We can review whether an existing assembly or an OEM configuration fits your project.
A part number and quantity are a good starting point. For a new assembly, include the system voltage, loads per circuit, relay and fuse count, wiring requirements and installation conditions.
Request a Relay Quote
Send the part number and quantity for a quotation. For a new wiring assembly, include the DC system voltage, loads per circuit and wiring requirements. We can review a catalog model or discuss an OEM configuration.
Prefer email? sales1@chinadaier.com