1.5SMC170CA-E3/9AT — 1500W bidirectional TVS in DO-214AB
The bidirectional configuration means a single device handles both positive and negative transients, simplifying BOM layout on AC or bipolar DC rails.
What the ratings mean for your protection design
For a 145V standoff rail, the 234V clamping ceiling means downstream components rated for 250V or higher have margin during a surge. Operating temperature spans -65°C to 150°C (junction), covering the full industrial and automotive ambient range. The DO-214AB (SMC) package is a standard surface-mount footprint shared with many SMCJ-series parts, so PCB layout reuse across multiple voltage variants is straightforward. No power line protection — the device is intended for secondary-side transient suppression on data, signal, or low-voltage power buses, not for direct mains AC line clamping.
Active lifecycle and sourcing posture
For BOM planning, the base product number is 1.5SMC170, and the full ordering code must include the suffix to match the reel and finish requirement.