What 7.02V standoff and 12.1V clamping mean for your ECU
The 1.5SMC8.2AHR7G is an automotive unidirectional TVS (Transient Voltage Suppressor) diode — the type field lists "Zener" because TVS devices are Zener-based, but the function here is transient clamping, not voltage regulation. The 1500W peak pulse rating sets the absorbed energy ceiling — above that, the diode goes into thermal runaway rather than clamping, so the circuit upstream must clear the fault faster than the device thermal time constant.
Automotive grade — what AEC-Q101 means in practice
AEC-Q101 qualification is the automotive stress-screen standard for discrete semiconductors — it covers temperature cycling, humidity bias, ESDA (HBM) ESD immunity, and mechanical integrity of the die-attach and wire-bond. A 150°C Tj max is tight — derate peak pulse current if the steady-state ambient pushes junction temperature toward that limit; the thermal resistance junction-to-ambient of the DO-214AB package sets the boundary.
DO-214AB SMC footprint and reel packaging
The DO-214AB (SMC) is a standard 2-pin SMA-size package with a 3.84 mm body width and Gull Wing leads. Surface mount — the cathode band marks the strikethrough direction for unidirectional polarity. Ships on Tape & Reel; confirm reel quantity and orientation before placing on the pick-and-place feeder. No exposed thermal pad on this package — thermal management is through the leads into the PCB copper plane, not a bottom-side pad.
The 1.5SMC8.2AHR7G is listed Active by Taiwan Semiconductor Corporation. Sourced to order through independent distribution; pricing and availability confirmed at RFQ. Because this is an automotive-grade part, check the date-code policy — automotive customers typically require fresh date codes and AEC-Q101 CoC traceability from the distributor.