Battery Doctor 20243-7 Master Disconnect Switch Negative 12/24V 500A
A 500A key-style master disconnect switch for 12V and 24V systems with a mounting bracket
- Product colorSilver
- 500 A continuous current protects heavy-duty circuits
- 12 V and 24 V operation fits most vehicle systems
- Key-style actuation gives positive on/off control
- Included bracket simplifies mounting on battery post
- California Proposition 65 notice lists cancer and reproductive-harm chemicals
Master Disconnect Switch 12/24V 500A
This Battery Doctor 20243-7 is a key-style master disconnect switch rated for 500 amps at 12 or 24 volts. It mounts with the included bracket and interrupts the negative cable to isolate the battery. The silver finish suits automotive, marine and industrial electrical systems.
Vehicle owners needing reliable battery isolation
The switch serves owners who want a simple way to prevent parasitic drain during storage or to add a safety cutoff. It is not suited for installations that require a positive-side disconnect or remote solenoid operation. Buyers needing integrated fusing or multiple circuit control should look elsewhere.
500 amp continuous rating
The 500A rating at 12V and 24V is the figure that determines whether this switch can handle the loads in your system. Verify that your maximum draw stays within this limit before fitting the unit. California Proposition 65 warnings apply to this product.
How it compares
Measured against everything we stock in Jump Starters, Chargers & Power Packs, at today’s prices. Recalculated every night.
- Price $91.99
- Pricier than about 90% of the 1,744 comparable items (median $14.99).
Specifications
| Product | |
|---|---|
| Brand name | BATTERY DOCTOR |
| Product color | Silver |
Questions about this item
Does the 500 A rating cover both 12 V and 24 V systems?
Yes, the switch is rated for 500 A continuous current at both 12 V and 24 V, so it handles heavy starter loads on either voltage.
What does the 500 A figure mean when the switch is installed in a vehicle?
It means the contacts can carry up to 500 amps continuously without overheating, allowing full starter-motor current to pass when the key is turned.
How is the switch mounted and what terminals does it use?
It includes a mounting bracket and uses a key-style actuator with bolt-on terminals for secure cable connections.
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