Vishay General Semiconductor, 1.5SMC series, Zener TVS diode, 1.5SMC22AHE3/57T, 1500W peak pulse, 18.8V reverse standoff, DO-214AB (SMC) package, AEC-Q101 qualified.
| Parameter | Value |
|---|---|
| Type | Zener |
| Series | Automotive, AEC-Q101, 1.5SMC, TransZorb® |
| Mounting | Surface Mount |
| Voltage - breakdown | 20.9V |
| Voltage - clamping (Max) @ ipp | 30.6V |
| Voltage - reverse standoff | 18.8V |
| Current - peak pulse (10/1000μs) | 49A |
| Power - peak pulse | 1500W (1.5kW) |
| Power line protection | No |
| Operating temperature | -65°C~150°C(TJ) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Applications | Automotive |
| Case | DO-214AB, SMC |
| Unidirectional channels | 1 |
The 1.5SMC22AHE3/57T is marked Obsolete by Vishay. This means the manufacturer has ceased production — no last-time-buy window remains open. A functional replacement would require a board-level review of the clamping voltage (30.6V at 49A) and the DO-214AB footprint.
Breakdown occurs at 20.9V minimum, clamping the surge to 30.6V maximum at 49A peak pulse current. For a 24V nominal system, this clamping margin leaves headroom for the downstream DC-DC converter's abs-max rating.