50A Battery Disconnect Switch for 12–48V Vehicles and Boats
A compact master battery disconnect switch for compatible 12–48 V DC systems. It is rated for 50 A continuous current, 75 A intermittent current and 300 A cranking current for up to 5 seconds, supporting manual battery isolation in vehicles, boats and low-voltage equipment.
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1. Manual Battery Isolation
This master battery disconnect switch provides manual ON/OFF control for compatible low-voltage DC electrical systems. It allows the battery circuit to be isolated during vehicle storage, electrical maintenance or emergency shutdown without repeatedly removing the battery cables.
2. Defined Current Ratings
• 50 A Continuous Rating: Supports continuous current loads up to 50 A within the specified operating conditions.
• 75 A Intermittent Rating: Accommodates temporary current loads up to 75 A.
• 300 A Cranking Rating: Supports cranking current up to 300 A for a maximum of 5 seconds.
• 50 V DC Maximum Voltage: Suitable for compatible 12 V, 24 V, 36 V and 48 V DC electrical systems within the rated limits.
• 50 mΩ Maximum Contact Resistance: Defines the supplier-stated maximum resistance across the switch contacts.
3. Rotary ON/OFF Control
• Manual Rotary Operation: Provides clear connection and isolation of the battery circuit.
• Master Disconnect Function: Helps prevent unintended battery drain when connected electrical equipment is not in use.
• Compact Housing: Supports installation in compatible vehicle, marine and equipment electrical systems.
• Wide Operating Temperature Range: Specified for operation from −30°C to +60°C.
4. Vehicle and Marine Applications
The switch can be considered for compatible cars, trucks, motorcycles, off-road vehicles, boats and other low-voltage DC equipment. It is suitable for automotive accessory distributors, marine electrical suppliers, vehicle conversion companies, repair workshops and battery-equipment manufacturers.
Compatibility is determined by system voltage, current requirements, installation space, cable size and terminal configuration rather than vehicle make, model or engine alone.
Key Features
• Manual ON/OFF battery isolation
• Supports compatible 12–48 V DC systems
• 50 A continuous current rating
• 75 A intermittent current rating
• 300 A cranking rating for 5 seconds
• Maximum system voltage of 50 V DC
• Operating temperature from −30°C to +60°C
• Compact ABS and metal construction
• Suitable for vehicle, marine and low-voltage DC applications
| Parameter | Specification |
|---|---|
| Product Type | Master battery disconnect switch |
| Switch Function | ON/OFF battery isolation |
| Fitment Type | Universal installation; electrical and dimensional verification required |
| Compatible Systems | Suitable 12–48 V DC vehicle and marine electrical systems |
| Maximum Voltage | 50 V DC |
| Continuous Current Rating | 50 A |
| Intermittent Current Rating | 75 A |
| Cranking Current Rating | 300 A for 5 seconds |
| Maximum Contact Resistance | 50 mΩ |
| Housing Material | ABS |
| Internal and Contact Material | Metal |
| Operating Temperature | −30°C to +60°C |
| Color | Black, red and white |
| Product Condition | New |
| Warranty | 12 months |
| Declared Certifications | CE and RoHS |
| Single Package Size | 4.6 × 4.3 × 5.9 cm |
| Single Gross Weight | 0.030 kg |
Compatibility and Selection Guidance
This battery disconnect switch is designed for compatible 12–48 V DC electrical systems and is not limited to a specific vehicle make or model.
Before ordering or installation, confirm:
• The electrical system voltage does not exceed 50 V DC.
• Continuous current does not exceed 50 A.
• Intermittent current does not exceed 75 A.
• Cranking current does not exceed 300 A for 5 seconds.
• The available installation space is suitable for the switch.
• Cable size and terminal connections are suitable for the intended current.
• Appropriate circuit protection is provided for the electrical system.
• Installation is completed by a person familiar with vehicle or marine DC electrical systems.
The product may be used in different vehicle and equipment types, but compatibility cannot be confirmed from vehicle make, model, year or engine information alone.
Applications
- Cars and light vehicles
- Trucks and commercial vehicles
- Off-road vehicles
- Motorcycles
- Boats and marine equipment
- Vehicle storage systems
- Battery-powered equipment
- Low-voltage DC electrical systems
Package
- Battery disconnect switch: 1 pc
