Battery Terminal Master Switch, 12-24V Negative, 500A Crank Rating
Professional-grade battery disconnect switch for vehicles and marine applications. Green rotary knob control, 17.5mm terminal diameter, prevents discharge and theft.
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Battery Terminal Master Switch – Negative Polarity
Brief Overview
This battery terminal master switch provides a reliable, tool-free disconnect solution for service work and long-term storage across automotive, marine, and industrial applications. The rotating green knob mechanism allows operators to instantly isolate the battery circuit without specialized equipment—essential for preventing unwanted discharge, protecting against theft, and improving shop workflow efficiency. When paired with quality copper battery terminal connectors, this switch creates a complete, professional battery management system your customers will value.
Key Features
- Rotary On/Off Control: Green plastic knob with scalloped edges and directional markings for intuitive operation
- Tool-Free Operation: No wrenches or keys required for battery disconnection
- Dual-Voltage Compatibility: Operates across 12V and 24V systems
- Heavy-Duty Contacts: Brass body with plated metal finish ensures corrosion resistance
- Crank-Rated Capacity: 500A crank rating handles high-current engine start scenarios
- Continuous Rating: 125A sustained load capacity
- Compact Design: 85mm overall length; 35mm knob diameter fits standard engine bays
- Negative Polarity Configuration: Pre-wired for negative terminal installation (diameter 17.5mm)
- Wide Temperature Range: Operates reliably from -40°C to +90°C
Technical Specifications
| Specification | Value |
|---|---|
| Polarity | Negative |
| Voltage Rating | 12–24V DC |
| Continuous Current | 125A |
| Crank Current | 500A |
| Terminal Diameter | 17.5mm |
| Cable Size | 4–6 AWG |
| Operating Temperature | -40°C to +90°C |
| Overall Length | 85mm |
| Knob Diameter | 35mm |
| Material | Brass body, plated metal clamp, green plastic control knob |
Business Advantages for Resellers
- High-Frequency Demand: Battery disconnects are regularly stocked by automotive shops, marine dealers, and RV service centers
- Theft Prevention Appeal: Resellers can position this as a security upgrade for customer vehicles stored for extended periods
- Service-Essential: Technicians appreciate tool-free operation for routine maintenance and battery isolation during electrical diagnostics
- Broad Application Base: Suitable for passenger vehicles, commercial trucks, campers, yachts, and industrial equipment—expanding your addressable market
- Durable Design: Brass construction and solid contacts minimize warranty returns, protecting your margin
- Stock Flexibility: Compact size allows efficient shelf management; high turnover typical in this category
Ideal Applications
- Vehicle battery service and storage
- Marine and RV battery isolation
- Anti-theft battery protection
- Electrical system diagnostics (safe isolation during work)
- Industrial equipment battery management
- Extended-storage vehicles (seasonal or long-term parking)
Reseller Tip
Bundle this master switch with zinc or aluminium battery terminal connectors to create a complete battery management package. This cross-sell opportunity increases transaction value while meeting customer needs for both disconnect and connection solutions.
Ready to stock a professional-grade battery control solution? Order in bulk and establish yourself as the go-to source for reliable vehicle battery management tools.