Siemens SMFH48 Class Smf Heater

Product Description

The SIEMENS SMFH48 is a Class SMF heater element used in motor starter and overload relay assemblies. These heater elements are sized to match specific full-load ampere ratings and work in conjunction with thermal overload relays to provide overcurrent protection for three-phase and single-phase motor circuits. The SMFH48 is a precision-matched component that triggers the overload relay at the correct thermal threshold, protecting motor windings from sustained overload conditions. Installation is performed by licensed electricians and industrial maintenance technicians working on motor control centers and combination starters.

The SMFH48 is suited for use in industrial and commercial motor control applications where thermal overload protection is required. It fits into SIEMENS Class SMF overload relay heater sockets and is selected based on the full-load ampere rating of the motor being protected. These heater elements are commonly installed in motor control centers, panel-mounted starters, and combination motor controllers in light manufacturing, HVAC mechanical rooms, and process equipment panels.

Key Features

• Class SMF heater element designed for SIEMENS thermal overload relay assemblies
• Sized for precise thermal overcurrent protection matched to motor full-load ampere rating
• Compact form factor for direct installation into compatible heater sockets
• Provides thermal trip response to protect motor windings from overload damage

Compatibility

Designed as an OEM-style replacement heater element for SIEMENS Class SMF thermal overload relay assemblies. Verify the correct heater element selection table for the target motor full-load ampere rating before installation.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC Article 430 governing motor branch circuit and overload protection requirements. De-energize and lockout/tagout the motor control circuit before removing or installing heater elements. Heater element selection must be verified against the motor nameplate full-load ampere rating and the manufacturer heater selection table. Do not substitute heater elements of a different class or designation, as incorrect sizing will compromise overload protection.

Technical Specifications

• Class: SMF
• Length: 0.311 inches
• Width: 0.154 inches
• Height: 0.154 inches
• Weight: 0.066 pounds
• UPC: 75455425967

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: SMFH48