TVS selection triad for 154 V rails
The 1.5SMC180CA-E3/57T: The three voltages that govern fit are the reverse standoff of 154 V (the DC or peak AC rail it protects without conducting), the minimum breakdown of 171 V (where clamping begins), and the maximum clamp of 246 V at the rated pulse current of 6.1 A.
Bidirectional protection for AC or bipolar buses
A single bidirectional channel means one device clamps both polarities — useful on AC signal lines, bipolar supplies, or data pairs where the common-mode voltage swings positive and negative. The 1500 W peak pulse rating at 10/1000 µs gives the surge-handling margin for industrial 24 VAC or ±48 V telecom rails that see repetitive transients.
Package and reflow fit
Housed in the DO-214AB (SMC) surface-mount package, the part shares the same footprint as the SMCJ industry standard. The -65°C to 150°C junction temperature range covers both cold-start and under-hood automotive ambient conditions without derating concerns.
Active lifecycle — standard procurement channel
No last-time-buy pressure, no EOL clock — it moves through standard authorized distribution.