| Type | HF21FF | |
| Coil voltage form | DC | |
| Coil voltage | 5, 12, 24, 48, 18, 6, 9 | |
| Contact arrangement | 1 Form B, 1 Form C, 1 Form A | |
| Contact version | single contact | |
| Terminal type | PCB | |
| Mounting | PCB-THT | |
| Construction | Flux proofed, Plastic sealed | |
| Coil power | Standard | |
| Sort | Single side stable | |
| Contact capacity | AgSnO2, AgSnO2 | |
| Insulation standard | Class B, Class F | |
| Contact plating | Without plating | |
| Packing method | Tube packing | |
| Rated voltage(V) | 250V.a.c | |
| Coil power | Approx 0.36 | |
| Dielectric strength (between coil & contacts) (VAC 1min) | 1500VAC 1min | |
| Operate time(ms) | ≤10 | |
| Release time(ms) | ≤5 | |
| Creepage Distance(mm) | 3.2 | |
| Electrical Distance(mm) | 1.6 | |
| Insulation resistance(MΩ) | 1000 | |
| Max. switching Current(AC) | 15 | |
| Max. switching voltage(DC) | 6 | |
| Max. switching voltage(VAC) | 277VAC | |
| Max. switching voltage(VDC) | 24VDC | |
| Ambient temperature (max)(℃) | -40 | |
| Ambient temperature (min)(℃) | 70 | |
| Length(mm) | 20.2 | |
| Width(mm) | 16.5 | |
| Heigh(mm) | 20.2 | |
| Mechanical endurance min | 10000000 | |
| Electrial eddurance min | 100000 | |
| IEC60335-1 | NO | |
| Product Description | Clapper Type Electromagnetic Relay | |
| Application | appliances,Street light control,etc | |
| Weight(g) | Aporox. 13 | |
| Volume(mm3) | 20.2×16.5×20.2 | |
| Product approval | UL | |
| File No. | UL E133481 |