3 Way Waterproof Pre-Wired Fuse Relay Box
Product Overview
The 3 Way Waterproof Pre-Wired Fuse Relay Box is a compact automotive power distribution and circuit control solution designed for auxiliary DC electrical systems that require reliable protection in demanding environments.
It integrates 3 ATC/ATO blade fuse positions and 3 automotive relay positions into one protective enclosure, allowing each circuit to be independently protected and relay-controlled.
The pre-wired harness reduces terminal crimping, relay socket assembly, and repetitive manual wiring, helping installers simplify installation and create a cleaner, more organized electrical system.
The waterproof housing provides enhanced protection against water, dust, dirt, and debris, making the product suitable for off-road vehicles, trucks, SUVs, RVs, utility vehicles, and other outdoor or exposed electrical applications.
Relay configurations are available for 12V and 24V systems, with relay current ratings from approximately 30A to 60A, depending on relay model, wire specification, electrical load, and project requirements.
The wiring and terminal structure can support wire sizes up to approximately 12 AWG, depending on terminal selection and final electrical configuration.
FUZTRAX can supply this product as a complete pre-wired assembly or provide housing, terminals, relays, fuses, and related components separately according to customer requirements.
Key Features
3 Fuse Positions + 3 Relay Positions
The integrated design combines three ATC/ATO blade fuse positions and three automotive relay positions in one compact enclosure.
Each fused circuit can be paired with an independent relay-controlled output, making this configuration suitable for applications where three electrical accessories require individual switching and circuit protection.
This provides a compact alternative to installing separate relays, fuse holders, and wiring throughout the vehicle.
Waterproof Protective Housing
The enclosure is designed to provide improved protection against water, dust, dirt, mud, and other contaminants commonly encountered in automotive and outdoor environments.
This makes the product suitable for installations where additional environmental protection is required.
Typical applications include:
For projects requiring a specific certified IP rating, please confirm the required protection standard and product configuration before ordering.
Pre-Wired for Faster Installation
The pre-installed wiring harness helps reduce repetitive terminal crimping, relay socket wiring, and manual assembly.
Color-coded wiring can make circuit identification easier and help reduce wiring errors during installation.
For OEM and ODM projects, wiring specifications can be customized according to customer requirements, including:
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Wire gauge
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Wire length
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Wire color
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Terminal configuration
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Relay wiring layout
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Fuse configuration
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Power input arrangement
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Circuit layout
Supports Up to 12 AWG Wire
The product can support wire sizes up to approximately 12 AWG, depending on terminal selection, wiring layout, and project requirements.
This provides greater flexibility for higher-current automotive accessories when the wire, fuse, relay, terminals, and connectors are properly matched to the electrical load.
Actual allowable current should always be determined according to the complete electrical system rather than wire size alone.
3 Independent Relay-Controlled Circuits
Three relay positions provide independent switching control for up to three electrical accessories.
Typical applications include:
The three independent relay circuits make the product particularly suitable for compact electrical systems requiring multiple controlled outputs.
12V / 24V Relay Options
Relay configurations are available for common automotive and equipment electrical systems.
Available voltage options include:
Available relay current ratings may include:
Relay models and contact configurations can be selected according to customer requirements.
Final relay selection should be based on:
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System voltage
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Continuous operating current
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Starting or inrush current
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Wire gauge
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Fuse rating
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Terminal capacity
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Connector capacity
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Installation environment
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Electrical load characteristics
ATC / ATO Blade Fuse Compatible
The fuse block is compatible with commonly used ATC/ATO automotive blade fuses.
Different fuse ratings can be selected for each circuit according to the actual operating current of the connected equipment.
The standardized blade fuse format makes fuse inspection, replacement, and maintenance convenient for automotive aftermarket and custom wiring applications.
Compact Integrated Design
Instead of installing three separate relays, three fuse holders, and multiple loose wiring connections, this fuse relay box integrates the main switching and protection components into one compact enclosure.
The centralized layout helps reduce wiring clutter and creates a cleaner, more professional electrical installation.
Multiple Supply Options
FUZTRAX can supply this product in different configurations according to customer requirements.
Complete Pre-Wired Assembly
Includes housing, terminals, relays, fuses, and pre-installed wiring.
Suitable for customers who require a ready-to-install electrical assembly.
Unwired Fuse Relay Box
The product can also be supplied without pre-installed wiring.
This option is suitable for:
Customers can create their own wiring layout according to specific project requirements.
Housing + Terminal Kit
The waterproof housing and terminals can be supplied separately for customers who prefer local assembly or independent wiring production.
Relay Supply
12V and 24V automotive relays can be supplied according to customer requirements.
Available relay current ratings may range from approximately 30A to 60A depending on the selected relay model.
Individual Components
Housing, terminals, relays, fuses, and related electrical components can also be ordered separately according to customer requirements.
Applications
The 3 Way Waterproof Pre-Wired Fuse Relay Box is suitable for a wide range of automotive and auxiliary electrical applications, including:
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Off-road vehicles
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Pickup trucks
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SUVs
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RVs
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Utility vehicles
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Special-purpose vehicles
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Custom vehicles
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LED light bars
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Fog lights
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Driving lights
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Work lights
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Auxiliary lighting
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Air horns
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Cooling fans
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Fuel pumps
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Auxiliary pumps
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Outdoor electrical equipment
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Automotive aftermarket wiring
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OEM wiring harness assemblies
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Custom power distribution systems
Product Specifications
Product Name:
3 Way Waterproof Pre-Wired Fuse Relay Box
Fuse Positions:
3
Relay Positions:
3
Fuse Type:
ATC / ATO Blade Fuse
Wiring Type:
Pre-Wired or Unwired
Relay Voltage Options:
12V / 24V
Relay Current Options:
Approximately 30A–60A
Maximum Supported Wire Size:
Up to approximately 12 AWG
Relay Model:
Customizable
Housing Protection:
Waterproof protective enclosure
Fuse Rating:
Customizable according to circuit requirements
Wire Gauge:
Customizable up to approximately 12 AWG
Wire Length:
Customizable
Wire Color:
Customizable
Terminal Configuration:
Customizable
Connector Type:
Customizable
Wiring Configuration:
Customizable
Supply Options:
Complete pre-wired assembly / Unwired box / Housing + terminals / Relays / Fuses / Individual components
Why Choose the 3 Way 3-Relay Waterproof Configuration?
The 3 Way 3-Relay configuration is designed for compact electrical systems where three accessories require independent relay switching and individual fuse protection.
Each circuit can be protected by its own fuse and controlled through a dedicated relay, helping simplify system design and reduce the need for separate relay sockets and inline fuse holders.
The waterproof enclosure provides additional protection compared with standard non-waterproof fuse relay boxes, making it more suitable for off-road, outdoor, utility, and exposed automotive applications.
Support for wiring up to approximately 12 AWG also provides greater flexibility when configuring higher-current auxiliary circuits.
OEM & ODM Customization
FUZTRAX provides OEM and ODM manufacturing services for automotive fuse boxes, relay boxes, wiring harnesses, terminals, and related electrical assemblies.
Customization options include:
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Relay voltage
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Relay current rating
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Relay model
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Relay contact configuration
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Wire gauge up to approximately 12 AWG
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Wire length
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Wire color
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Fuse rating
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Fuse configuration
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Terminal type
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Connector type
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Wiring layout
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Circuit configuration
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Power input arrangement
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Housing configuration
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Product labeling
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Customer logo
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Packaging
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Complete or semi-finished assembly
Customers can order a complete pre-wired product or purchase the waterproof housing, terminals, relays, fuses, and other related components separately according to their own production and assembly requirements.
Important Electrical Notice
The current rating printed on a relay represents the relay contact specification and does not automatically represent the safe continuous current capacity of the complete fuse relay box or wiring harness.
The use of 12 AWG wire does not automatically mean that every circuit can safely carry the same current under all operating conditions.
Actual allowable circuit current depends on multiple factors, including:
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Wire cross-sectional area
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Wire length
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Fuse rating
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Relay contact rating
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Terminal capacity
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Connector capacity
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Continuous operating current
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Starting or inrush current
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Ambient temperature
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Installation method
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Electrical load characteristics
Always select the correct relay, fuse, wire gauge, terminals, and connectors according to the actual electrical requirements of the connected equipment.
For high-current, motor-driven, or specialized electrical applications, confirm the complete electrical specifications before ordering.
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