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The SIEMENS SMFH16 is a Class SMF overload heater element designed for use in thermal overload relays and motor starters. These heater elements provide overcurrent protection by responding to heat generated during overload conditions, interrupting the circuit before motor windings sustain damage. The SMFH16 is a small-form factor component installed by licensed electricians and industrial maintenance technicians as part of motor control center (MCC) assemblies or standalone starter units. Its compact dimensions make it suitable for panel space-constrained installations.
Class SMF heater elements are used in commercial and industrial motor control applications where thermal overload protection is required. The SMFH16 fits into compatible Siemens overload relay blocks and is typically installed in motor starters protecting fractional to small integral horsepower motors. This heater element is a direct replacement component used during scheduled maintenance or after an overload event has caused the original element to fail.
Designed as an OEM-style replacement heater element for use in Siemens Class SMF thermal overload relays and compatible motor starter assemblies.
Installation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the motor control circuit before removing or installing heater elements. Verify the heater element selection matches the motor full-load amperage and service factor per the overload relay manufacturer sizing chart. Do not energize the starter until the enclosure is fully closed and all components are properly seated.
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