Eaton / Cutler-Hammer QBHW2015V Miniature Circuit Breaker

This breaker is specifically designed for Eaton Pow-R-Line 1a and Pow-R-Line 2a lighting and appliance panelboards. Because it is a bolt-on breaker, it will not fit in standard residential load centers that require plug-on designs like the CH or BR series.

The V suffix indicates that the breaker features a special 50 degree Celsius ambient temperature calibration, rather than the standard 40 degree Celsius calibration. This is typically required for marine, naval, or other high-temperature industrial environments.

While QBHW and BAB breakers share the same physical Quicklag bolt-on footprint and fit the same Pow-R-Line panelboards, they have different short-circuit interrupting ratings. The QBHW2015V is rated for 22kAIC at 240V, whereas standard BAB breakers are rated at 10kAIC. Always verify the required fault current rating of your panel before substituting.

It utilizes a bolt-on connection, which provides a secure, vibration-resistant mechanical and electrical termination directly to the panelboard bus. This is required in many commercial and industrial specifications compared to plug-on alternatives.

The breaker uses fixed long-time and instantaneous (LI) trip functions. The thermal bimetal element provides delayed tripping for sustained overloads, preventing nuisance trips from temporary surges. The magnetic element provides immediate tripping when it detects high-level short-circuit currents.

The breaker is equipped with standard box lugs that accept 14 AWG to 4 AWG copper or aluminum conductors. When installing aluminum wire, an approved joint compound should be applied to the conductors to prevent oxidation.

Yes, in addition to its standard AC ratings, this breaker is UL listed for direct current applications with an interrupting capacity of 5kA at 48VDC. This makes it suitable for low-voltage DC control or distribution circuits.