T-Spec Circuit Breaker

Fits 1/0- to 4-gauge wire (140-amp)

  • T-Spec Circuit Breaker


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Item #: 120CBF140

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Our take on the T-Spec Circuit Breaker

by Buck Pomerantz

SPL lovers

Getting tired of replacing your power fuse every time you show off how loud your system can play? You should consider replacing the fuse holder with a circuit breaker. T-Spec's competition-grade circuit breaker protects your wiring and vehicle with reliable, fast-acting, spring-loaded disconnection when sensing a short circuit or over-current condition.

Valet stereo security

A circuit breaker also allows you to disable your expensive audio system, so no one can mess with it when you park in an attended garage, use valet parking, or leave your vehicle for detailing. The breaker accepts 1/0- to 4-gauge wire and features 24-karat gold-plated conductors for corrosion-free connections. You'll need Allen head wrenches to install this circuit breaker. Warranty: 1 year. 

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Hands-on research from the Crutchfield Labs (what are the Labs?)

Product Research
What's in the box?

  • 140A Circuit breaker with 1/0 AWG or 4 AWG input and output

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.


Overview: This package includes a T-Spec v12-series, 24K hard gold plated circuit breaker, housed in an impact-resistant polycarbonate cover. The circuit breaker has a rating of 140 amps, and protects your vehicle and electronics without the need for constantly changing blown fuses. If a short circuit occurs, the circuit breaker will safely and instantly disconnect your electronics. A red lever will indicate that the circuit breaker has activated. To reset the breaker, simply return the lever to the normal position. A manual disconnect button is also included to allow you to break the circuit whenever you want. The base has two holes to allow you to mount the circuit breaker with screws or wire ties.

Wire Connections: The circuit breaker will accept either 1/0 AWG or 4 AWG power wire. The wire is attached to the circuit breaker with Allen-head set screws, located below a snap-on removable cover. A 3mm Allen wrench (not included) is required to tighten/loosen the set screws.

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T-Spec Circuit Breaker Reviews

Average Customer Review:

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5 out of 5

Works great!!

Written By Anonymous, Elmira, NY on Friday, April 18, 2014
Crutchfield Customer Review (What's this?)
This circuit breaker works great. Accepts my 4 gauge power wires and if an upgrade is ever necessary, goes up to I/0 gauge. Much more compact than breakers I've used in the past.
Compact size
None as of yet.
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5 out of 5

hard to find

Written By Mark H, Cincinnati, OH on Tuesday, September 17, 2013
Crutchfield Customer Review (What's this?)
this is a hard to find item. i am using it for my power inverter on my work truck for the added safety and to shut down when not needed.
1 out of 1 people found this helpful
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Add accessories for the T-Spec Circuit Breaker

The right tools will make the installation easier. See all categories & accessories

Skewdriver Pro SPK4042 Ratcheting straight and offset screwdriver set with 40 bits (Skewdriver Pro with ratchet handle, pictured)
8 people say
Your Price: $49.99
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For a more in-depth review and enhanced detailed information on the T-Spec Circuit Breaker, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_120CBF140/T-Spec-Circuit-Breaker-140-amp.html ).

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