Transient suppressor with 1500 W peak pulse rating
The 1.5SMC150CA-E3/57T: The reverse standoff voltage is 128 V, so the part stays transparent on a nominal 120 V rail and only conducts when the line exceeds the breakdown threshold of 143 V.
Clamping voltage and breakdown thresholds
Breakdown voltage is specified at 143 V minimum, with the reverse standoff at 128 V. The 15 V margin between standoff and breakdown ensures the diode does not clip normal line ripple or steady-state overvoltage within the rated tolerance. The bidirectional channel means the same clamping characteristic applies for positive and negative transients — no polarity concern when installing on an AC line or a floating DC bus.
Package and temperature range for board integration
Housed in a DO-214AB (SMC) surface-mount package, the part is reflow-solderable and occupies a standard footprint shared with other SMC-packaged TVS diodes. Operating junction temperature spans -65°C to 150°C, covering automotive under-hood and industrial enclosure ambient extremes. The wide range means no derating concern for most indoor or outdoor installations.
Active lifecycle and sourcing posture
The product status is Active — Vishay continues to manufacture this part.