| PartNumber | HE721C1210 | HE721C1200 | HE721C1220 |
| Description | Reed Relays REED RELAY | Reed Relays REED RELAY | Reed Relays Relays |
| Manufacturer | Littelfuse | Littelfuse | Littelfuse |
| Product Category | Reed Relays | Reed Relays | Reed Relays |
| RoHS | Y | Y | Y |
| Coil Voltage | 12 VDC | 12 VDC | 12 VDC |
| Relay Contact Form | 1 Form C (SPDT-NO, NC) | 1 Form C (SPDT-NO, NC) | 1 Form C (SPDT-NO, NC) |
| Maximum Switched Current | 250 mA | 250 mA | 250 mA |
| Switching Voltage | 175 VDC | 175 VDC | 175 VDC |
| Maximum Switched Power | 5 W | 5 W | 5 W |
| Coil Suppression Diode | Yes | No | - |
| Coil Resistance | 500 Ohms | 500 Ohms | 500 Ohms |
| Termination Style | Through Hole | Through Hole | Through Hole |
| Series | HE700 | HE700 | HE700 |
| Packaging | Bulk | Tube | Tube |
| Contact Form | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) |
| Form Factor, or Case Style | DIP | DIP | - |
| Brand | Hamlin / Littelfuse | Hamlin / Littelfuse | Hamlin / Littelfuse |
| Product Type | Reed Relays | Reed Relays | Reed Relays |
| Factory Pack Quantity | 500 | 500 | 25 |
| Subcategory | Relays | Relays | Relays |