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SIEMENS Manual Motor Control: 20 Trip Class, SMFH21 - Electrical
SiemensElectrical

SIEMENS Manual Motor Control: 20 Trip Class, SMFH21

SKU 3G-OTH-39859

Brand
Siemens
Item
Manual Motor Control: 20 Trip Class, SMFH21
Category
Electrical
UNSPSC
39121029 — Isolation transformer
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Technical Specifications

Siemens
Manufacturer Part Number
SMFH21
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

What is the Siemens SMFH21 manual motor control used for?

The Siemens SMFH21 is a manual motor control used for switching and protecting motors in industrial applications. It provides overload protection with a 20 Trip Class rating, making it suitable for conveyors, pumps, and fans in manufacturing and process industries.

What are the specifications of the Siemens SMFH21?

The Siemens SMFH21 manual motor control has a 20 Trip Class rating and is designed for motor protection. Its manufacturer part number is SMFH21. It is a compact device for manual switching and overload protection in electrical control panels.

Where to buy Siemens SMFH21 worldwide?

You can source the Siemens SMFH21 manual motor control through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide locations, ensuring reliable supply for your operations.

How to install the Siemens SMFH21 manual motor control?

Install the Siemens SMFH21 by mounting it on a DIN rail or panel, connecting the motor leads to the output terminals, and setting the trip class according to motor specifications. Always follow Siemens guidelines and local electrical codes for safe operation.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens electrical. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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