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SKU:
ZZ3F04455
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300A 12V Master Battery Disconnect Switch 75920 Heavy Duty High Capacity Amp
$54.89
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$54.89
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Compatible Models
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Compatible equipment / model
300A 12V Master Battery Disconnect Switch for Heavy Duty High Capacity Amp
This 300A 12V master battery disconnect switch handles high electrical loads, providing a reliable way to cut off battery power for maintenance or safety. It is designed for heavy-duty applications where a high-capacity amp rating is essential to manage current flow.
Overview
This master battery disconnect switch is a robust 300A 12V unit built to isolate a battery from an electrical system. It serves as a critical safety device, allowing operators to quickly halt power flow to prevent shorts, fires, or parasitic drain. This switch is suited for vehicles, boats, and industrial equipment requiring a high-capacity shutoff.
Built For Performance
- 300A continuous current rating for heavy-duty electrical systems
- 12V DC operation compatible with standard automotive and marine electronics
- Heavy-duty copper contacts ensure low resistance and reliable conductivity
- Compact housing with a manual on/off knob for clear visual status
- High-temperature resistant construction for under-hood durability
- Standard stud terminals accept common cable lugs for secure connections
On-The-Job Use
- Isolates battery power during vehicle storage to prevent drain
- Provides emergency shutoff in off-road or race vehicles
- Disconnects power for safe electrical system servicing
- Used in marine applications to cut power in emergencies
- Serves as an anti-theft deterrent by disabling start circuits
Specs At A Glance
| Current Rating | 300A |
| Voltage Rating | 12V DC |
| Model Number | 75920 |
| Terminal Type | Stud bolt |
| Part Number(s) | 75920 |
Good To Know
Q: What gauge wire should I use with this disconnect switch? A: For a 300A continuous load, use 4/0 AWG or larger pure copper cable to handle the current safely. Confirm your wire's ampacity matches the switch rating.
Q: Can this switch handle starting a diesel engine? A: Yes, the 300A rating covers the surge current of large starting motors, but you must ensure the battery cables and connections are equally rated. Proper torque on all studs is required to maintain full contact.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.