Clamping window and pulse current
The 1.5KE7.5AHB0G: The breakdown voltage range starts at 7.13 V minimum, ensuring the device triggers before the protected circuitry sees a damaging overvoltage. The clamping voltage of 11.3 V at 139 A peak pulse current sets the maximum voltage the load experiences during a surge — this is the figure to compare against the downstream component's absolute maximum ratings. With no power-line protection feature, this TVS is intended for signal lines, low-power supply rails, or I/O ports — not for mains or high-energy AC inputs. The single unidirectional channel protects one polarity; for bidirectional or AC-coupled lines, two devices in series-opposed configuration are needed.
DO-201AA axial through-hole package
The DO-201AA (also known as DO-27) axial leaded package allows through-hole mounting with the body standing off the board. The large copper lead frame and body geometry dissipate the heat from repetitive pulse events better than a surface-mount equivalent — important for applications where the TVS absorbs multiple transients over the product life. Supplied in bulk packaging, this variant is suited for hand-assembly or low-volume production runs where tape-and-reel is not required. The through-hole form factor also simplifies rework and field replacement compared to a soldered SMD part.
Active production — no obsolescence risk
The AEC-Q101 certification means each device has passed the reliability stress tests (temperature cycling, HAST, autoclave, solder heat resistance) required for automotive tier-1 approval.