300A Battery Disconnect Switch for 12–48V Vehicles and Boats
A high-current battery disconnect switch for compatible 12–48 V DC systems. Its single-circuit ON/OFF design is rated for 300 A continuous current, 500 A intermittent current for 5 minutes and 900 A cranking current for 30 seconds, supporting manual battery isolation in vehicles, RVs, boats and other low-voltage DC equipment.
Share to:
1. High-Current Battery Isolation
This single-circuit battery disconnect switch provides manual ON/OFF control between one battery and one connected load group. It allows the battery circuit to be isolated during vehicle storage, electrical maintenance or emergency shutdown without removing the battery cables.
2. High-Current Electrical Ratings
• 300 A Continuous Rating: Supports continuous current loads up to 300 A within the specified operating conditions.
• 500 A Intermittent Rating: Supports intermittent current loads up to 500 A for a maximum of 5 minutes.
• 900 A Cranking Rating: Supports cranking current up to 900 A for a maximum of 30 seconds.
• 48 V DC Maximum Operating Voltage: Suitable for compatible low-voltage DC systems within the rated voltage limit.
• Single-Circuit Configuration: Connects or disconnects one battery from one load group.
3. Manual ON/OFF Operation
• Two Switch Positions: Provides clear ON and OFF operating positions.
• Rotary Knob Control: Allows the battery circuit to be connected or isolated manually.
• M10 Copper Studs: Tinned copper terminal studs support high-current cable connections.
• Multiple Mounting Options: The housing design supports surface, front-panel or rear-panel installation, subject to the available mounting space.
4. Vehicle and Marine Applications
The switch can be used in compatible cars, trucks, RVs, camper vans, off-road vehicles, ATVs, UTVs, boats and other low-voltage DC equipment. It is suitable for automotive accessory distributors, marine electrical suppliers, vehicle conversion companies, repair workshops and battery-system equipment manufacturers.
Compatibility must be determined by system voltage, current requirements, cable size, terminal dimensions and installation space rather than vehicle make or model alone.
Key Features
• Single-circuit ON/OFF battery isolation
• 300 A continuous current rating
• 500 A intermittent rating for 5 minutes
• 900 A cranking rating for 30 seconds
• Maximum operating voltage of 48 V DC
• Two-position rotary control
• M10 tinned copper terminal studs
• Surface, front-panel or rear-panel mounting options
• Suitable for vehicle, RV, off-road and marine electrical systems
| Parameter | Specification |
|---|---|
| Product Type | Master battery disconnect switch |
| Switch Type | Single-circuit ON/OFF rotary switch |
| Switch Function | Connects or disconnects one battery from one load group |
| Number of Battery Inputs | 1 |
| Number of Switch Positions | 2 |
| Supported System Voltage | 12–48 V DC |
| Maximum Operating Voltage | 48 V DC |
| Continuous Current Rating | 300 A |
| Intermittent Current Rating | 500 A for 5 minutes |
| Cranking Current Rating | 900 A for 30 seconds |
| Housing Material | ABS plastic |
| Terminal Material | Tinned copper |
| Terminal Stud Size | 3/8″-16 × 7/8″ |
| Metric Terminal Stud Size | M10 × 22 mm |
| Control Type | Rotary knob |
| Mounting Options | Surface, front-panel or rear-panel mounting |
| Color | Black |
| Warranty | 12 months |
| Single Package Size | 18 × 12 × 12 cm |
| Single Gross Weight | 0.500 kg |
Compatibility and Selection Guidance
This battery disconnect switch is intended for compatible low-voltage DC battery systems and is not limited to a specific vehicle make or model.
Before ordering or installation, confirm:
• The system voltage does not exceed 48 V DC.
• Continuous current does not exceed 300 A.
• Intermittent current does not exceed 500 A for 5 minutes.
• Cranking current does not exceed 900 A for 30 seconds.
• Battery cables and cable terminals are suitable for the required current.
• Cable terminals are compatible with the M10 × 22 mm studs.
• The available installation space supports the selected mounting method.
• Appropriate fuses or circuit protection are installed where required.
• Installation is completed by a person familiar with high-current DC electrical systems.
Applications
• Cars and light vehicles
• Trucks and commercial vehicles
• RVs and camper vans
• Off-road vehicles
• ATVs and UTVs
• Boats and marine equipment
• Battery storage systems
• Vehicle conversion projects
• Low-voltage DC equipment
Package
Included Item
• 300 A battery disconnect switch: 1 pc
