Microchip Technology SMCJ12E3/TR13, Zener TVS diode, 12V reverse standoff, 22V clamping at 68.2A, 1500W peak pulse power, DO-214AB SMC package, Tape & Reel
| Parameter | Value |
|---|---|
| Type | Zener |
| Mounting | Surface Mount |
| Voltage - breakdown | 13.3V |
| Voltage - clamping (Max) @ ipp | 22V |
| Voltage - reverse standoff | 12V |
| Current - peak pulse (10/1000μs) | 68.2A |
| Power - peak pulse | 1500W (1.5kW) |
| Power line protection | No |
| Operating temperature | -65°C~150°C(TJ) |
| Package | Tape & Reel (TR) |
| Applications | General Purpose |
| Case | DO-214AB, SMC |
| Unidirectional channels | 1 |
Its 12V reverse standoff voltage means it will not conduct during normal operation on a 12V supply, but triggers at a minimum breakdown of 13.3V to shunt surge current away from sensitive downstream components. The clamping voltage is held to 22V at the peak pulse current of 68.2A, giving a 10V headroom above the standoff — a reasonable margin for most 12V logic and power supplies.
The SMCJ12A is a common alternative in the same SMCJ family, but confirm the specific breakdown and clamping voltage tolerances from its datasheet. The SMCJ12E3/TR13 has a minimum breakdown of 13.3V and clamping at 22V; the SMCJ12A may differ slightly. Both share the DO-214AB footprint, so a board-level swap is possible if the electrical specs align with your protection threshold.