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| Part Number | W51-A121B1-15 | W51-A152A1-10 | W51-A152A1-20 | W51-A152A1-15 | W51-A122B1-15 |
| Manufacturer | TE Connectivity Potter & Brumfield Relays | TE Connectivity Potter & Brumfield Relays | TE Connectivity Potter & Brumfield Relays | TE Connectivity Potter & Brumfield Relays | TE Connectivity Potter & Brumfield Relays |
| Series | W51 | W51 | W51 | W51 | W51 |
| Packaging | Tray | Tray | Tray | Tray | Tray |
| Product Status | Active | Active | Active | Active | Active |
| Mounting Type | Panel Mount | Panel Mount | Panel Mount | Panel Mount | Panel Mount |
| Breaker Type | Thermal | Thermal | Thermal | Thermal | Thermal |
| Current Rating (Amps) | 15A | 10A | 20A | 15A | 15A |
| Voltage Rating - AC | 125 V | 250 V | 250 V | 250 V | 250 V |
| Voltage Rating - DC | 50 V | 50 V | 50 V | 50 V | 50 V |
| Actuator Type | Rocker | Rocker | Rocker | Rocker | Rocker |
| Number of Poles | 1 | 1 | 1 | 1 | 1 |
| Illumination | Red | - | - | - | Red |
| Illumination Voltage (Nominal) | - | - | - | - | - |
| Approval Agency | - | - | - | - | - |
The following parts include "W51-A121B1-15" in Silicon Labs W51-A121B1-15.
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