QOB120 Circuit Breaker

Product Details
Manufacturer:Square D
Voltage:120 VAC 240 VAC 48 VDC

Purchase Options

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Additional Product Details
kAIC Ratings:10 KAIC at 120 VAC
10 KAIC at 240 VAC
5 KAIC at 48 VDC
Lug Kits:1 standard wire connections on load side

Mounting Hardware:Most panels include all required hardware

Dimensions:.75 w x 3 h x 2.25 d
Common Accessories:add 1021 to end of part for Shunt Trip = QOB1201021 factory-installed option only
add 1200 or 1201 to end of part for auxillary switch factory-installed option only = QOB1201200 or QOB1201201
add 2100 to the end of part for alarm switch = QOB1202100
Catalogue Data Sheet:   Click to download or view PDF

Product Description

Din-rail mounted thermal magnetic circuit breakers, like the QOB120 are commonly found in many light commercial and light industrial Square D panels. The electromagnet characteristics of the QOB120 allow it to trip instantaneously under large surges in current (e.g., short circuits). A bimetallic strip within the QOB120 will respond to less extreme but longer-term over-current conditions. These breakers are very commonly used in commercial and light industrial applications across the United States. The QOB120 breakers are used to small motors, lights and other small equipment.

The QOB120 can be purchased from www.LiveWireSupply.com. Itís always best to consult local utility requirements and code prior to installing this breaker.

Square D Molded Case Circuit Breakers, like the QOB120 are designed to provide circuit protection for low voltage distribution protection for low voltage distribution systems. They are described by NEMA as, "a device for closing and interrupting a circuit between separable contacts under both normal and abnormal conditions," and furthermore as, ". . . a breaker assembled as an integral unit in a supporting and enclosing housing of insulating material." The NEC describes them as, "A device designed to open and close a circuit by non-automatic means, and to open the circuit automatically on a predetermined overload of current, without injury to itself when properly applied within its rating."

This photo is for reference purposes.

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