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Square D B-25 Thermal Overload Relay Heater Element
Square D B-25 Thermal Overload Relay Heater Element
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Description:
The Square D B25.0 Thermal Unit is a melting-alloy heater element designed to fit Square D thermal overload relays and drive the protective bimetal mechanism during overload events. Intended for use in 600 VAC systems, it carries a 40°C ambient rating and is described as a plug-in mounting thermal unit compatible with standard Square D overload relays and Schneider Electric Standard Trip Class 60 configurations. Available in identifiers such as B25, B25.0, and the part-number reference 58755, this heater element is typically specified for amperage ranges around 14.1–19.2 A depending on the relay model and is used wherever melting-alloy overload protection is required.
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