The 1.5SMC170AS_R1_00001 is a 1500W peak-pulse Zener TVS diode in the standard DO-214AB (SMC) surface-mount package. When the surge hits, it clamps at 234V maximum while shunting 6.4A of peak pulse current (10/1000µs waveform). That 1500W rating means it can absorb a single 1ms surge at the rated power without failing, but the actual energy handling depends on pulse width and duty cycle — derate for repetitive events.
Housed in a DO-214AB (SMC) package, the part is a surface-mount unidirectional TVS with one channel. The cathode is banded on the body. Standard reflow profile for an SMC package applies — 260°C peak, J-STD-020 compliant.
The operating junction temperature range is -55°C to 150°C, which covers industrial control cabinets, automotive under-hood zones, and outdoor telecom gear. The power line protection flag is set to 'No' — this is a DC rail clamp, not an AC mains protector. For a 145V rail (common in 120VAC rectified supplies or 144V battery banks), the standoff margin is tight but within the 10% derating rule of thumb.