LITTELFUSE ATD300BP Anti Theft Battery Master Switch 12-24V 135A

( Brand: Littelfuse ), ( Part Type: Switch Battery ), ( Manufacturer Part Number: ATD300BP ), ( Performance Part: Yes ), ( Vintage Part: No ), ( Universal Fitment: Direct Replacement ), ( Country Of Origin: China ), ( Is To Send Compatibility: False )

Review LITTELFUSE Anti theft Battery Master Switch 135a Protection

Introducing the Littelfuse ATD300BP Anti-Theft Battery Master Switch, a high-performance accessory designed for vehicles requiring superior battery protection against theft. This master switch, compatible with 12-24V battery systems and capable of handling up to 135A of current, is an essential addition for those looking to enhance the security of their vehicles.

The ATD300BP is engineered with a robust design to ensure reliable operation under various conditions. It features a weather-resistant, automotive-grade housing, ensuring that it can withstand the rigors of outdoor use and the harsh elements. The switch is designed to be tamper-resistant, making it a formidable deterrent against theft attempts.

This master switch includes a built-in ignition output, enabling it to control the vehicle's ignition system. This feature ensures that the engine cannot be started unless the master switch is in the "ON" position. Additionally, it comes equipped with a "START" button that can be used to start the engine manually, providing added convenience.

The ATD300BP is easy to install, with clear and concise instructions provided in the included documentation. It can be wired in parallel with the original battery switch, making the installation process straightforward. The switch also includes a conveniently located LED indicator, which illuminates when the switch is in the "ON" position, ensuring that the user is always aware of the status of their battery system.

In summary, the Littelfuse ATD300BP Anti-Theft Battery Master Switch is an essential accessory for anyone looking to enhance the security of their vehicle's battery system. Its robust design, tamper-resistant features, and ease of installation make it a top choice for those seeking peace of mind and protection against theft.

The Littelfuse ATD300BP Anti-Theft Battery Master Switch is designed to prevent the theft of batteries in 12-24V applications. Below are some pros and cons that may help you make an informed decision about purchasing this product.

1. Effective theft deterrent: The ATD300BP features a patented design that makes it difficult for thieves to bypass, providing excellent protection against battery theft.

2. High current handling capacity: With a 135A continuous current rating, this switch can handle heavy loads, making it suitable for various applications where high power consumption is required.

3. Convenient mounting design: The switch comes with a compact, weatherproof housing that can be easily mounted on the vehicle's dashboard or elsewhere, providing easy access to the on/off function.

4. Keyed ignition: The switch requires a key to be turned to the "on" position, ensuring that only authorized individuals can start the vehicle or access the battery power.

5. Suitable for various vehicle types: The 12-24V voltage range makes this switch suitable for a wide range of vehicles, from cars and trucks to boats and industrial equipment.

1. Additional cost: Installing an anti-theft battery master switch like the Littelfuse ATD300BP involves an additional cost, which may not be justified for some users who don't see battery theft as a significant concern.

2. Complex installation: The installation process may require professional assistance, especially if the vehicle's electrical system is complex or if the user is not familiar with the process.

3. Potential compatibility issues: It's essential to ensure that the switch is compatible with the specific application, as some vehicles or equipment may require different wiring configurations or voltage requirements.

The Littelfuse ATD300BP Anti-Theft Battery Master Switch is a reliable and effective solution for those concerned about battery theft in their 12-24V applications. Its high current handling capacity, convenient mounting design, and keyed ignition make it an excellent theft deterrent. However, the additional cost and complex installation process may not be suitable for everyone. Ultimately, the decision to purchase this switch depends on the user's specific needs and priorities. If battery theft is a significant concern, the benefits of this switch may outweigh the costs. If not, it may be more cost-effective to consider other security measures or forgo the investment altogether.

If you operate a fleet of vehicles or equipment where battery theft is a concern, or if you frequently leave your vehicle unattended in high-risk areas, the Littelfuse ATD300BP Anti-Theft Battery Master Switch is a worthwhile investment. Its patented design and high current handling capacity make it an effective theft deterrent, while its convenient mounting design and keyed ignition provide added security and ease of use. However, if you're unsure about the installation process or if the additional cost outweighs the benefits for your specific application, it may be worth consulting with a professional electrician or seeking alternative solutions to address your battery security needs.

part # atd300bp prices

• $16.88-$59.95

specifications wiringwench:

• brand: Littelfuse
• part type: Switch Battery
• manufacturer part number: ATD300BP
• performance part: Yes
• vintage part: No
• universal fitment: Direct Replacement
• country of origin: China
• is to send compatibility: False

shipping wiringwench:

• cost: $8.99
• class: Standard
• transit: 3-6 Days
• type: Fixed
• service: UPS Ground
• carrier: UPS

general wiringwench:

• condition: New
• Car Truck Parts Accessories > Starters, Alternators, ECUs Wiring > Other Starters, Alternators, ECUs Wiring

offer wiringwench:

• options: Ship-to-home
• sold: 0
• availability: In Stock
• quantity: 1
• started: February 20, 2026

seller wiringwench:

• rating: 99.5%
• # reviews: 238207

payments wiringwench:

• wallet: Paypal
• other
• credit card: Diners-club

returns wiringwench:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller

Littelfuse ATD300BP Is Similar To:

• Menbers 08010100 Littelfuse 8010100 300a Battery Switch With Fixed T-handle (42.7% similar) $17.92–$322.56. (June 6th, 2025)
• Littelfuse 75908 Littlefuse Battery Disconnect Switch (54.7% similar) $7.95–$49.95. (February 28th, 2026)