Diodes Incorporated SMAJ78A-13-F Zener TVS diode, 78V reverse standoff, 126V clamp, 400W peak pulse, DO-214AC, Tape & Reel.
| Parameter | Value |
|---|---|
| Type | Zener |
| Mounting | Surface Mount |
| Voltage - breakdown | 86.7V |
| Voltage - clamping (Max) @ ipp | 126V |
| Voltage - reverse standoff | 78V |
| Current - peak pulse (10/1000μs) | 3.2A |
| Power - peak pulse | 400W |
| Power line protection | No |
| Operating temperature | -55°C~150°C(TJ) |
| Package | Tape & Reel (TR) |
| Applications | General Purpose |
| Case | DO-214AC, SMA |
| Unidirectional channels | 1 |
The SMAJ78A-13-F: The 126 V clamp at 3.2 A means the diode absorbs the surge and holds the line below that voltage — the downstream components see no more than 126 V during the event. Operating from -55°C to 150°C (TJ), it handles the full industrial temperature range and self-heating during repetitive surges without derating the junction.
No official cross-reference or pin-compatible alternative is recorded for the SMAJ78A-13-F. The same DO-214AC footprint is shared by other SMAJ-series TVS diodes from Diodes Incorporated, but voltage and power ratings differ per variant.