We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

BATTERY DOCTOR In-Line Battery Disconnect Switch, Negative, 12V, 2500A - Battery Disconnect Switches
BATTERY DOCTORBattery Disconnect Switches

BATTERY DOCTOR In-Line Battery Disconnect Switch, Negative, 12V, 2500A

The BATTERY DOCTOR Battery Isolator Disconnect Switch is an in-line rotary switch with negative polarity, rated for 12V maximum voltage and 2,500 A maximum surge current, featuring copper contacts (MPN 20256).

SKU 3G-OTH-497592

Brand
BATTERY DOCTOR
Item
In-Line Battery Disconnect Switch, Negative, 12V, 2500A
Category
Battery Disconnect Switches
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

BATTERY DOCTOR
Manufacturer Part Number
20256
Type
In-Line, Negative, 12V, 2,500 A
Polarity
Negative
Maximum Voltage
12V
Contact Material
Copper
Maximum Surge Current
2,500 A

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

BATTERY DOCTOR Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The BATTERY DOCTOR Battery Isolator Disconnect Switch is an in-line rotary switch with negative polarity, rated for 12V maximum voltage and 2,500 A maximum surge current, featuring copper contacts (MPN 20256).

Frequently Asked Questions

What is a BATTERY DOCTOR Battery Isolator Disconnect Switch used for?

This in-line rotary switch isolates the battery from the electrical system, preventing parasitic drain and enabling safe maintenance. It is commonly used in vehicles, marine, and industrial equipment where a reliable 12V disconnect is needed.

What are the specifications of the BATTERY DOCTOR 20256 battery disconnect switch?

The BATTERY DOCTOR 20256 is a negative-polarity, in-line rotary switch rated for 12V maximum voltage and 2,500 A maximum surge current. It features copper contacts for high conductivity and durability.

Where to buy a BATTERY DOCTOR battery disconnect switch worldwide?

3G Electric supplies the BATTERY DOCTOR 20256 battery disconnect switch worldwide. We handle full logistics, customs clearance, and delivery to your location, ensuring you receive the correct part for your application.

How to install a BATTERY DOCTOR in-line battery disconnect switch?

Install the switch in the negative battery cable, ensuring the cable is disconnected from the battery first. Secure the copper terminals tightly, and verify the switch operates smoothly before reconnecting power. Always follow manufacturer guidelines.

Used in

Common applications for BATTERY DOCTOR
Fleet maintenance — BATTERY DOCTOR 31200 Series circuit breakers for overcurrent protection in truck electrical systems
Automotive wiring harness repair — BATTERY DOCTOR GPT primary wires (20 AWG, 22 AWG) for replacing damaged low-voltage cables
Industrial control panels — BATTERY DOCTOR primary wires for internal wiring of 60 V control circuits
Marine battery systems — BATTERY DOCTOR circuit breakers for protecting DC circuits on boats
Off-road equipment — BATTERY DOCTOR 31200 Series breakers for resettable protection in ATVs and utility vehicles
Battery charger connections — BATTERY DOCTOR primary wires for extending charger leads in workshop environments

BATTERY 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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from BATTERY DOCTOR

View all BATTERY DOCTOR parts
This top post knife blade battery disconnect switch is designed for 12V negative-ground systems. It features brass contacts and is suitable for disconnecting the battery in vehicles or equipment to prevent parasitic drain and enhance safety during storage or maintenance
BATTERY DOCTOR
This top post knife blade battery disconnect switch is designed for 12V negative-ground systems. It features brass contacts and is suitable for disconnecting the battery in vehicles or equipment to prevent parasitic drain and enhance safety during storage or maintenance
This knob-operated, in-line battery disconnect switch is designed for negative polarity 12V systems. It features copper contacts and is rated for 100 A continuous current with a 500 A surge capacity. Commonly used to prevent parasitic battery drain during storage or servicing in automotive, marine, and industrial equipment
BATTERY DOCTOR
This knob-operated, in-line battery disconnect switch is designed for negative polarity 12V systems. It features copper contacts and is rated for 100 A continuous current with a 500 A surge capacity. Commonly used to prevent parasitic battery drain during storage or servicing in automotive, marine, and industrial equipment
In-line rotary disconnect switch for negative-side battery disconnection. Rated for 12V and 300 A max current with copper contacts. Used to isolate battery power in vehicles or equipment to prevent parasitic drain, secure storage, or enable maintenance
BATTERY DOCTOR
In-line rotary disconnect switch for negative-side battery disconnection. Rated for 12V and 300 A max current with copper contacts. Used to isolate battery power in vehicles or equipment to prevent parasitic drain, secure storage, or enable maintenance
This in-line rotary disconnect switch isolates negative polarity 24V battery systems. Rated for 100 A continuous current with a 500 A surge capacity, it features copper contacts. Commonly used to prevent parasitic drain, enable maintenance, or serve as an emergency cutoff in vehicle and equipment electrical systems
BATTERY DOCTOR
This in-line rotary disconnect switch isolates negative polarity 24V battery systems. Rated for 100 A continuous current with a 500 A surge capacity, it features copper contacts. Commonly used to prevent parasitic drain, enable maintenance, or serve as an emergency cutoff in vehicle and equipment electrical systems
This top-post rotary disconnect switch is designed for negative polarity applications at 12V with a maximum surge current of 500 A. The zinc contacts provide electrical conductivity. Commonly used to isolate battery power for vehicle maintenance, storage, or safety, helping to prevent parasitic drain and reduce fire risk
BATTERY DOCTOR
This top-post rotary disconnect switch is designed for negative polarity applications at 12V with a maximum surge current of 500 A. The zinc contacts provide electrical conductivity. Commonly used to isolate battery power for vehicle maintenance, storage, or safety, helping to prevent parasitic drain and reduce fire risk
In-line rotary disconnect switch for negative battery terminals. Rated for 12V maximum voltage and 5000A surge current. Silver plated copper contacts ensure low resistance. Used to isolate battery from electrical system for maintenance or to prevent parasitic drain
BATTERY DOCTOR
In-line rotary disconnect switch for negative battery terminals. Rated for 12V maximum voltage and 5000A surge current. Silver plated copper contacts ensure low resistance. Used to isolate battery from electrical system for maintenance or to prevent parasitic drain
This in-line knife blade switch disconnects the battery from a 12V electrical system, preventing parasitic drain during storage or servicing. It is commonly used on vehicles, boats, and industrial equipment where a quick, manual battery isolation is needed. The switch features brass contacts and is rated for 12V maximum voltage
BATTERY DOCTOR
This in-line knife blade switch disconnects the battery from a 12V electrical system, preventing parasitic drain during storage or servicing. It is commonly used on vehicles, boats, and industrial equipment where a quick, manual battery isolation is needed. The switch features brass contacts and is rated for 12V maximum voltage
BATTERY DOCTOR Battery Disconnect Switch: In-Line Rotary, In-Line, Negative, 12V, 300 A Max Current (MPN 20387)
BATTERY DOCTOR
BATTERY DOCTOR Battery Disconnect Switch: In-Line Rotary, In-Line, Negative, 12V, 300 A Max Current (MPN 20387)