Diodes Incorporated SMCJ45A-13 Zener TVS diode, 1500W peak pulse power, 45V reverse standoff, 72.7V clamping, unidirectional, DO-214AB SMC package, Tape & Reel.
| Parameter | Value |
|---|---|
| Type | Zener |
| Mounting | Surface Mount |
| Voltage - breakdown | 50V |
| Voltage - clamping (Max) @ ipp | 72.7V |
| Voltage - reverse standoff | 45V |
| Current - peak pulse (10/1000μs) | 20.6A |
| Power - peak pulse | 1500W (1.5kW) |
| Power line protection | No |
| Operating temperature | -55°C~150°C(TJ) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Applications | General Purpose |
| Case | DO-214AB, SMC |
| Unidirectional channels | 1 |
The SMCJ45A-13: The minimum breakdown voltage is 50 V, giving a 5 V guard band above the 45 V standoff — the diode stays off during normal operation but triggers before the protected circuitry sees damaging overvoltage. The 72.7 V clamp ceiling means a 45 V rail sees its transient limited to roughly 1.6× the nominal, which is within the safe operating area of most downstream 60 V or 75 V-rated components.