Song Chuan 801H has 1 recorded cross-reference match across 1 manufacturer. Compare the listed alternatives 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.
1recorded matches
1alternate manufacturers
1reference sources
1matches with technical notes
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801H series references
Two-way recorded relationships. Each source may carry conditions or differences.
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.
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.