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![1- SQUARE D QO120HM High Magnetic Breaker 120/240-Volt 20-Amp 1-POLE: Amazon.com: Industrial & Scientific 1- SQUARE D QO120HM High Magnetic Breaker 120/240-Volt 20-Amp 1-POLE: Amazon.com: Industrial & Scientific](https://images-na.ssl-images-amazon.com/images/I/61DWFyt5pRL._AC_UL600_SR600,600_.jpg)
1- SQUARE D QO120HM High Magnetic Breaker 120/240-Volt 20-Amp 1-POLE: Amazon.com: Industrial & Scientific
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What is a QO, QOB, QOU, HOM or CHOM high magnetic breaker (suffix HM), and is it marked anywhere on the breaker? | Schneider Electric USA
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