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| Part Number | 50R400 | 50R4002 | 50R40029 | 50R4003 |
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. |
| Series | 50R | 50R | 50R | 50R |
| Packaging | Bulk | Bulk | Bulk | Bulk |
| Product Status | Active | Active | Active | Active |
| Type | Voltage Sensing AC | Voltage Sensing AC | Voltage Sensing AC | Voltage Sensing AC |
| Trip Status | Energized Low | Energized Low | Energized Low | Energized Low |
| Trip Range | 380 ~ 480V AC | 380 ~ 480V AC | 380 ~ 480V AC | 380 ~ 480V AC |
| Delay Time | No Delay | 2 Sec ~ 300 Sec | 2 Sec ~ 300 Sec | 2 Sec ~ 300 Sec |
| Voltage - Supply | 380 ~ 480VAC | 380 ~ 480VAC | 380 ~ 480VAC | 380 ~ 480VAC |
| Output Type | Relay | Relay | Relay | Relay |
| Circuit | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) |
| Contact Rating @ Voltage | 10A @ 240VAC | 10A @ 240VAC | 10A @ 240VAC | 10A @ 240VAC |
| Mounting Type | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount |
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