Siemens SMFH09 Class Smf Heater Thermal Unit

Product Description

The SIEMENS SMFH09 is a Class SMF replacement heater element designed for use in bimetallic overload relays. Thermal heater units like the SMFH09 protect motors and other electrical loads from sustained overcurrent conditions by generating a calibrated thermal response that trips the overload relay. Licensed electricians and industrial maintenance technicians install these elements as direct replacement components inside compatible Siemens overload relay assemblies. The part weighs approximately 0.419 pounds and is a compact unit suited for panel and motor control center installations.

Class SMF heater elements are used in motor control applications across light commercial and industrial settings. They are installed inside bimetallic overload relays mounted in motor starters and combination starter units. The heater element is matched to the full-load amperage of the motor being protected, so selecting the correct heater class and suffix is critical to proper overload protection. This element is appropriate for new installations as well as field replacement of worn or failed thermal units in existing assemblies.

Key Features

• Class SMF designation for use in compatible Siemens bimetallic overload relay assemblies
• Provides calibrated thermal overload protection for motor circuits
• Compact form factor suitable for motor control center and enclosed starter installations
• Direct replacement heater element for field service and maintenance
• Lightweight construction at 0.419 pounds

Compatibility

Designed as an OEM-style replacement heater element for Class SMF bimetallic overload relay assemblies. Consult the overload relay heater selection table to confirm correct amperage range match for the protected motor circuit.

Installation Notes

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 that the replacement heater suffix corresponds to the full-load amperage of the motor being protected before inserting the element. Do not modify the heater element or use it outside of its rated relay assembly.

Technical Specifications

• Weight: 0.419 pounds
• Dimensions (L x W x H): 0.154 x 0.154 x 0.154 inches
• UPC: 75455425927
• Heater Class: SMF

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: SMFH09