The 1.5SMC12A-M3/9AT: It clamps transients at 16.7 V maximum while protecting a 10.2 V nominal rail, making it a fit for general-purpose DC bus and signal-line surge suppression in industrial control, telecom, and power supply applications.
Protection window and surge capacity
The single unidirectional channel is suited for positive-rail protection where reverse polarity is not a concern; for bipolar or AC lines, a bidirectional variant from the same 1.5SMC family would be the correct choice. Operating temperature spans -65°C to 150°C junction, covering the full industrial range and extending into under-hood automotive ambient conditions where the device must clamp reliably at high soak temperatures.
Package and board integration
Housed in the DO-214AB (SMC) surface-mount package, the 1.5SMC12A-M3/9AT uses the standard JEDEC footprint with a cathode band for polarity identification. The supplier device package reference DO-214AB (SMCJ) confirms the same mechanical outline, simplifying PCB layout across multiple Vishay TVS order codes. The base product number 1.5SMC12 allows cross-referencing to other package or reel options within the same voltage rating.