STMicroelectronics SM15T33A, TRANSIL™ series, Zener TVS diode, unidirectional, 1500W peak pulse power, 28.2V reverse standoff, 31.4V breakdown, 59V clamping, 169A peak pulse current, DO-214AB SMC package, -55°C to 150°C.
| Parameter | Value |
|---|---|
| Type | Zener |
| Series | SM15T, TRANSIL™ |
| Mounting | Surface Mount |
| Voltage - breakdown | 31.4V |
| Voltage - clamping (Max) @ ipp | 59V |
| Voltage - reverse standoff | 28.2V |
| Current - peak pulse (10/1000μs) | 169A (8/20µs) |
| 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 |
Peak pulse power is 1500 W, peak pulse current 169 A under 8/20 µs. Minimum breakdown voltage is 31.4 V, maximum clamping voltage 59 V.
Housed in a DO-214AB (SMC) surface-mount package, the SM15T33A is a standard footprint. This is a unidirectional device for a single DC rail.
For BOM planning, that means no forced redesign or end-of-life scramble on this line.
The SM15T33A is a unidirectional Zener TVS diode with one channel.
Both are 1500 W TVS diodes in a DO-214AB package with similar standoff voltages around 28 V to 33 V, but the SM15T33A is from ST's TRANSIL series while the SMCJ33A is a generic JEDEC-registered part from multiple manufacturers. The key difference is in the clamping characteristics and breakdown tolerance — verify the specific Ipp and Vclamp curves from each datasheet for your surge waveform.