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GE | 12HFA51A42H | HFA Multicontact Auxiliary Relay

Original price was: ¥99,999.00.Current price is: ¥5,652.00.

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Detailed content

The GE 12HFA51A42H is an HFA Series multicontact auxiliary relay designed for industrial power protection, switchgear control, and electrical interlocking applications. It is an electromechanical hinged-armature relay that provides multiple independent contact circuits for simultaneous control, signaling, and trip-related operations.

The HFA51A42H model is commonly used in GE protection and control panels, including utility substations, generator systems, and industrial power distribution equipment. It features a 125 VDC coil configuration and multiple electrically isolated contacts for flexible control circuit applications.

Product Datasheet

Parameter Description
Brand GE (General Electric)
Model 12HFA51A42H
Series HFA Series Multicontact Relay
Product Name High-Speed Multicontact Auxiliary Relay
Origin / Place of Origin USA
Product Status New Surplus / Original Replacement
Relay Type Electromechanical Hinged-Armature Auxiliary Relay
Dimensions Approx. 15 x 13 x 12 inches including shipping package
Weight Approx. 10 lb (4.5 kg)
Coil Voltage 125 VDC
Contact Configuration Multi-contact independent circuits
Discontinued Yes, legacy product line

Common Questions & Answers

Q: What is the function of GE 12HFA51A42H?
A: The relay provides auxiliary switching functions in protection and control circuits, allowing multiple electrical operations to occur simultaneously through separate contact outputs.

Q: Where is the HFA51A42H commonly installed?
A: It is used in electrical substations, generator protection systems, switchgear cabinets, and industrial control panels requiring reliable relay logic.

Q: What voltage does this relay use?
A: The 12HFA51A42H uses a 125 VDC operating coil configuration.

Q: What are common failure symptoms?
A: Typical problems include contact wear, coil failure, slow operation, incorrect switching signals, oxidation of terminals, and mechanical wear caused by long service periods.

Q: What should be checked before replacement?
A: Verify the complete GE part number, coil voltage, contact arrangement, mounting style, terminal wiring, and protection system drawings before installation.

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