| PartNumber | HRDI421 | HRDI117S | HRDI422 |
| Description | Time Delay & Timing Relays INTERVALTIMER | Time Delay & Timing Relays INTERVALTIMER | Time Delay & Timing Relays INTERVALTIMER |
| Manufacturer | Littelfuse | Littelfuse | Littelfuse |
| Product Category | Time Delay & Timing Relays | Time Delay & Timing Relays | Time Delay & Timing Relays |
| RoHS | Y | Y | Y |
| Display Type | Hand Dial | - | - |
| Termination Style | Quick Connect Terminal | SMD/SMT | Quick Connect Terminal |
| Relay Contact Form | 1 Form C (SPDT-NO, NC) | 1 Form C (SPDT-NO, NC) | 1 Form C (SPDT-NO, NC) |
| Operating Supply Voltage | 120 VAC | 12 VDC | 120 VAC |
| Timing Range | 1 s to 100 s | - | 10 s to 100 s |
| Contact Rating | - | 30 A | 30 A, 15 A |
| Packaging | Bulk | Bulk | Bulk |
| Contact Form | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) |
| Type | Interval Timer | Interval Timer | Interval Timer |
| Brand | Littelfuse | Littelfuse | Littelfuse |
| Product Type | Timing Relays | Timing Relays | Timing Relays |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Relays | Relays | Relays |
| Unit Weight | 4 oz | - | - |
| Series | - | HRDI | - |