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

3G Electric
RFQ CartGet a QuoteSign inSign up
BATTERY DOCTOR Top Post Knife Blade Battery Disconnect Switch - Battery Disconnect Switches
BATTERY DOCTORBattery Disconnect Switches

BATTERY DOCTOR Top Post Knife Blade Battery Disconnect Switch

The BATTERY DOCTOR Battery Disconnect Switch is a top post knife blade switch with negative polarity and a maximum voltage of 12V. It features brass contacts and is identified by manufacturer part number 20208.

SKU 3G-OTH-497591

Brand
BATTERY DOCTOR
Item
Top Post Knife Blade Battery Disconnect Switch
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
20208
Type
Top Post, Negative, 12V
Polarity
Negative
Maximum Voltage
12V
Contact Material
Brass

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 Disconnect Switch is a top post knife blade switch with negative polarity and a maximum voltage of 12V. It features brass contacts and is identified by manufacturer part number 20208.

Frequently Asked Questions

What is a BATTERY DOCTOR Battery Disconnect Switch used for?

This top post knife blade switch disconnects the battery in vehicles or equipment to prevent parasitic drain, reduce fire risk during storage, and secure electrical systems during maintenance. It is suitable for 12V negative-ground applications.

What are the specifications of the BATTERY DOCTOR 20208 switch?

The BATTERY DOCTOR 20208 is a top post knife blade disconnect switch with negative polarity, a maximum voltage of 12V, and brass contacts. It is designed for top-post battery terminals and is identified by MPN 20208.

Where to buy a BATTERY DOCTOR 20208 battery disconnect switch worldwide?

3G Electric supplies the BATTERY DOCTOR 20208 battery disconnect switch to customers worldwide. We handle full logistics, customs clearance, and delivery, ensuring you receive the correct part for your application.

How to install a top post knife blade battery disconnect switch?

Disconnect the negative battery cable first. Remove the existing terminal nut, place the switch over the battery post, and tighten securely. Reattach the cable to the switch stud. Always verify polarity matches your system (negative in this case) before finalizing.

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 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 in-line rotary disconnect switch isolates the battery from the electrical system to prevent parasitic drain and allow safe maintenance. Rated for 12V maximum voltage and 2500A maximum surge current, it features copper contacts. Suitable for use in vehicles, marine, and industrial equipment requiring a negative polarity disconnect
BATTERY DOCTOR
This in-line rotary disconnect switch isolates the battery from the electrical system to prevent parasitic drain and allow safe maintenance. Rated for 12V maximum voltage and 2500A maximum surge current, it features copper contacts. Suitable for use in vehicles, marine, and industrial equipment requiring a negative polarity disconnect
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)