1500 W surge clamp for 8.55 V rails
The 1.5SMC10CA-E3/9AT: It clamps transients on an 8.55 V nominal rail, with breakdown starting at 9.5 V minimum and clamping held to 14.5 V maximum at the rated 103 A peak pulse current.
Clamping voltage and standoff margin
Reverse standoff voltage of 8.55 V means the device does not conduct appreciably below that level, so it sits across a 5 V or 8 V supply rail without leakage. The 14.5 V clamping ceiling ensures the protected circuit sees no more than that during a surge — critical for downstream ICs with absolute-max ratings near 16 V. Peak pulse current of 103 A (10/1000 µs) is the current the diode can shunt during the surge event; the 1500 W rating is the product of clamp voltage and this current. For shorter pulses (8/20 µs waveform), the peak current capability is higher — the 10/1000 µs figure is the conservative benchmark used in telecom and industrial standards.
Package and board integration
Housed in a DO-214AB (SMC) surface-mount package, also designated as SMCJ. The footprint is standard — two terminals with a large cathode tab for heat sinking. The -65°C to 150°C junction temperature range covers automotive under-hood and industrial enclosure ambient without derating.