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Keep service personnel safe and protect the battery and electrical systems in your emergency vehicle, tractor, heavy-duty truck, or boat with the 75920 Series 36V Master Battery Disconnect Switch.
The heavy-duty battery disconnect switch ensures the safety of service professionals by disconnecting the battery from the vehicle electrical system, safeguards against battery drain from parasitic loads, and features built-in lock-out/tag-out for tampering and theft prevention.
As an IPX8-rated waterproof battery disconnect switch, it is ideal for a wide range of vehicles, including construction equipment, heavy-duty trucks, boats, and vehicles operating in harsh conditions, such as snowplows and snow removal equipment. Fitting a standard master disconnect mounting pattern, the 75920 series can be used as a drop-in replacement.
With a large knob that makes manual operation simple, plus clear switch position markings and 90° switch travel, the high-amp battery disconnect can effectively be used as a manual emergency power cutoff switch.
- High amperage continuous current capacity of 400A with a single 4/0 cable at 12V dc, 300A at 24V dc, or 200A at 36V dc
- IPX8-rated waterproof battery disconnect switch for external mounting on vehicles as well as installation on boats and marine equipment
- Can be used in high-side or low-side applications
- Black or gray thermoplastic housing with a UL 94 V-0 rating
- Tested per SAE J1455 for salt, calcium chloride, and magnesium chloride, delivering a rust- and corrosion-free high-amp battery disconnect
- Large red, yellow, or black knob makes the master battery disconnect switch easy to operate while wearing gloves
- Built-in lock-out/tag-out (LOTO) satisfies OSHA requirements for an energy isolation device
- Large divider on the base prevents accidental shorting of high energy cables
75920 Parts
Filters
Part Number | Actions | Current Rating (Continuous) in Amps | Current Rating (inrush) in Amps | Voltage Rating (V) | Circuitry | Ingress Protection | Actuator | Contacts | Housing | Agency Approval - Shock |
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Part Number | Actions | Current Rating (Continuous) in Amps | Current Rating (inrush) in Amps | Voltage Rating (V) | Circuitry | Ingress Protection | Actuator | Contacts | Housing | Agency Approval - Shock | |
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400 | 3000 | 36 | SPST | IP68 | Red Knob | Copper | Engineering Thermoplastic | ||||
400 | 3000 | 36 | SPST | IP68 | Yellow Knob | Copper | Engineering Thermoplastic | Tested to SAE J1455 | |||
400 | 3000 | 36 | SPST | IP68 | Red Knob | Copper | Plated Steel | ||||
400 | 3000 | 36 | SPST | IP68 | Red Knob | Copper | Engineering Thermoplastic | Tested to SAE J1455 | |||
400 | 3000 | 36 | SPST | IP68 | Red Knob | Copper | Engineering Thermoplastic | ||||
400 | 3000 | 36 | SPST | IP68 | Red Knob | Copper | Engineering Thermoplastic | ||||
400 | 3000 | 36 | SPST | IP68 | Red Knob | Copper | Engineering Thermoplastic | ||||
400 | 3000 | 36 | SPST | IP68 | Red Knob | Copper | Engineering Thermoplastic | ||||
400 | 3000 | 36 | SPST | IP68 | Black Knob | Copper | Engineering Thermoplastic | ||||
400 | 3000 | 36 | SPST | IP68 | Red Knob | Copper | Engineering Thermoplastic | Tested to SAE J1455 | |||
400 | 3000 | 36 | SPST | IP68 | Red Knob | Copper | Engineering Thermoplastic | ||||
75920 Applications


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Rely on Littelfuse to deliver circuit protection and power management solutions designed to boost the performance of electric forklifts and other
Highlights Section
- Heavy-Duty Trucks
- Construction & Agricultural Equipment
- Material Handling & Mining
- Off-Road Vehicles & Emergency Vehicles
- Marine
Series: 75920 Resources

Littelfuse-Commercial Vehicle Catalog
Find electronic components for trucks, buses, and construction, agricultural, marine, material handling, recreational, and marine vehicles.

75920 Instruction Sheet
Instructions for installing and operating a 75920 manual battery disconnect switch are provided in English, French, and Spanish.