Transient suppression for 154 V rails
The 1.5SMC180CAHM3/H: Three voltage thresholds define its protection envelope: reverse standoff at 154 V (the maximum DC or AC peak voltage the protected line can carry without the diode conducting), breakdown at 171 V minimum (where clamping starts), and clamping at 246 V maximum (the voltage the load sees during a surge at the rated peak current).
Graded as Automotive and qualified to AEC-Q101, this part meets the stress and reliability requirements for under-hood and chassis-mounted electronics — the -65°C to 150°C operating range covers the full automotive thermal profile, from cold cranking to engine bay heat soak.
DO-214AB footprint and peak current
Packaged in DO-214AB (SMC) — a standard surface-mount footprint for TVS diodes rated at this power level. The single bidirectional channel protects a single line pair against both positive and negative transients, simplifying layout for DC rails or signal lines that swing both polarities. Peak pulse current is 6.1 A for the 10/1000 µs waveform at the clamping voltage — a significant margin above the normal line current in most 154 V applications, ensuring the diode handles the surge without exceeding its thermal limits.