BATTERY DOCTOR Battery Disconnect Switch: Knob, In-Line, Negative, 12V, 100 A Max Current
The BATTERY DOCTOR Battery Disconnect Switch (MPN 20304) is a knob-operated, in-line, negative-polarity switch rated for 12V with a maximum current of 100 A and a maximum surge current of 500 A, featuring copper…
SKU 3G-OTH-497583
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Product Description
The BATTERY DOCTOR Battery Disconnect Switch (MPN 20304) is a knob-operated, in-line, negative-polarity switch rated for 12V with a maximum current of 100 A and a maximum surge current of 500 A, featuring copper contacts. 3G Electric interprets this demand and delivers the genuine switch, sourcing it across our 14 industrial departments — with specialist depth in electrical controls as an authorised distributor for brands like Schneider, ABB, and Siemens — then quotes and supports your order.
Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.
Frequently Asked Questions
What is a BATTERY DOCTOR Battery Disconnect Switch used for?
This knob-operated, in-line switch disconnects the negative battery terminal on 12V systems, preventing parasitic drain during storage or servicing. It is commonly used in automotive, marine, and industrial equipment where a reliable, manual power cutoff is needed.
What are the specifications of the BATTERY DOCTOR Battery Disconnect Switch 20304?
The switch is rated for 12V with a maximum continuous current of 100 A and a surge capacity of 500 A. It features copper contacts, negative polarity, and an in-line knob design. The manufacturer part number is 20304 from BATTERY DOCTOR.
Where to buy a BATTERY DOCTOR Battery Disconnect Switch worldwide?
3G Electric supplies the genuine BATTERY DOCTOR switch (MPN 20304) to customers worldwide. We handle full logistics, customs clearance, and delivery, sourcing across 14 industrial departments including electrical controls, where we carry brands like Schneider, ABB, and Siemens.
How to install a BATTERY DOCTOR Battery Disconnect Switch?
Install the switch in-line on the negative battery cable. Ensure the battery is disconnected before wiring. Tighten the copper contact terminals securely to handle up to 100 A continuous. Always follow the manufacturer's instructions for safe operation and surge protection.
Used in
Common applications for BATTERY DOCTORBATTERY DOCTOR Products
3G Electric supplies BATTERY DOCTOR battery disconnect switches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.









