Microchip Technology SMCJ11E3/TR13, Zener TVS diode, 1500W peak pulse power, 11V reverse standoff, 20.1V clamping, DO-214AB surface mount, Tape & Reel
| Parameter | Value |
|---|---|
| Type | Zener |
| Mounting | Surface Mount |
| Voltage - breakdown | 12.2V |
| Voltage - clamping (Max) @ ipp | 20.1V |
| Voltage - reverse standoff | 11V |
| Current - peak pulse (10/1000μs) | 74.6A |
| 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 11V reverse standoff voltage means the diode does not conduct at the normal 12V bus voltage, but triggers when the line exceeds the 12.2V minimum breakdown.
Rated at 1500W peak pulse power, this diode absorbs a single 10/1000µs transient up to that level without failing. In a 12V system, that translates to clamping a 74.6A surge — enough for most automotive load-dump and inductive kickback events.
Yes. The 11V reverse standoff voltage sits below the 12V nominal rail, so the diode is non-conducting during normal operation. This keeps the protected circuitry within typical 12V-system abs-max limits during a surge.
For a 12V DC rail with a defined ground reference, the unidirectional part is the correct choice — it clamps only the positive transient and does not add capacitance from a second Zener junction. The breakdown and clamping voltages are the same between the two variants.