12HFC21B1A
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New Sealed — New and unused, supplied in original manufacturer packaging.
New — New and unused. Original manufacturer packaging may be opened, missing or replaced.
Refurbished — Professionally inspected, tested and restored to full working condition.
Used — Previously used, inspected and tested as fully operational.
Condition: New
Priced on Request
Est. shipping: October 05 2026
Product Overview:
The 12HFC21B1A is an instantaneous overcurrent relay designed for industrial electrical and automation applications. It functions as an electromechanical current protection device, specifically providing instantaneous differential protection (IEEE Device 87). The relay operates within a current range of 0.5 to 4 amps and is suitable for operation at 50/60Hz frequencies. It is part of the HFC family of relays and is used to detect and respond to overcurrent conditions in electrical systems.
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