Hongfa HF21FF has 3 recorded cross-reference matches across 3 manufacturers. Research equivalent, alternate or similar parts using the listed candidates, and check their source notes before selecting a replacement.
Series reference — complete ordering code required. These entries identify relay families. Match input or coil voltage, contact form, pinout, footprint, ratings and operating conditions using current datasheets before choosing a product.
3recorded matches
3alternate manufacturers
1reference sources
3matches with technical notes
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HF21FF series references
Two-way recorded relationships. Each source may carry conditions or differences.
PDF page 1, row 11. Series designation only; complete ordering suffixes and operating options are not specified by this chart. Hongfa identifies the table as reference information and directs application questions to its representatives. Printed column: Omron; printed Hongfa label: HF21FF. Published research candidate, not a qualified drop-in replacement. Confirm current ordering codes, availability, coil/input voltage, contact form, load ratings and derating, switching mode, pinout, footprint, dimensions, isolation, approvals and application suitability. Reverse search preserves the source relationship, not reverse replacement suitability.
PDF page 2, row 11. Series designation only; complete ordering suffixes and operating options are not specified by this chart. Hongfa identifies the table as reference information and directs application questions to its representatives. Printed column: Song Chuan; printed Hongfa label: HF21FF. Published research candidate, not a qualified drop-in replacement. Confirm current ordering codes, availability, coil/input voltage, contact form, load ratings and derating, switching mode, pinout, footprint, dimensions, isolation, approvals and application suitability. Reverse search preserves the source relationship, not reverse replacement suitability.
PDF page 1, row 11. Series designation only; complete ordering suffixes and operating options are not specified by this chart. Hongfa identifies the table as reference information and directs application questions to its representatives. Printed column: TE Connectivity (P&B); printed Hongfa label: HF21FF. Published research candidate, not a qualified drop-in replacement. Confirm current ordering codes, availability, coil/input voltage, contact form, load ratings and derating, switching mode, pinout, footprint, dimensions, isolation, approvals and application suitability. Reverse search preserves the source relationship, not reverse replacement suitability.
These series references are starting points for comparing product families. Select and verify the complete ordering code.
A recorded cross reference does not establish a drop-in replacement. Compare current datasheets, package or mounting dimensions, pinout, electrical ratings and operating conditions for your application. Similar parts can differ in critical specifications.
Counts describe recorded relationships, not stock, sales, testing or independent qualification. Manufacturer-and-part identities remain separate. Indexing dates do not establish current specifications or availability.
Check current manufacturer documents and electrical, mechanical, environmental and application requirements before selecting a replacement.