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| PartNumber | HRDS120 | HRDS313M | HRDS321 |
| Description | Time Delay & Timing Relays SINGLESHOTTIMER | Time Delay & Timing Relays SINGLESHOTTIMER | Time Delay & Timing Relays SINGLESHOTTIMER |
| Manufacturer | Littelfuse | Littelfuse | Littelfuse |
| Product Category | Time Delay & Timing Relays | Time Delay & Timing Relays | Time Delay & Timing Relays |
| RoHS | Y | Y | Y |
| Termination Style | Quick Connect Terminal | Quick Connect Terminal | 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 | 12 VDC | 24 VDC | 24 VDC |
| Timing Range | 0.1 s to 10 s | Fixed 3m | 1 s to 100 s |
| Contact Rating | 30 A | 30 A | 30 A |
| Series | HRDS | HRDS | HRDS |
| Packaging | Bulk | Bulk | Bulk |
| Contact Form | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) |
| Brand | Littelfuse | Littelfuse | Littelfuse |
| Product Type | Timing Relays | Timing Relays | Timing Relays |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Relays | Relays | Relays |
