Device identity and key parametrics
The 1.5KE27CAHB0G is a bidirectional TVS diode from Taiwan Semiconductor's 1.5KE series, in a DO-201AA (DO-27) axial leaded package supplied in bulk. The device is qualified to AEC-Q101, the automotive-grade discrete semiconductor stress test qualification, covering temperature cycling, ESD sensitivity, and reliability screening for under-hood and chassis-mounted electronics.
Automotive-grade surge protection
The 1500 W peak pulse capability at 10/1000 µs means it can absorb load-dump and inductive-kick transients common on 24 V automotive power buses without external clamp circuitry. The 23.1 V reverse standoff voltage sits above the nominal 24 V battery rail, so the diode does not conduct during normal operation, yet the 25.7 V minimum breakdown ensures it fires before the downstream electronics see overvoltage damage. The bidirectional configuration (single channel) protects both polarities from a single device, simplifying layout on signal or power lines that see reverse-battery or AC-coupled transients.