1500 W peak pulse — what that clamping voltage means for the line you are protecting
The 1.5KE75CA/B: When the transient hits, it clamps at 103 V maximum — that is the voltage the protected node actually sees, not the standoff level. For a 64.1 V reverse standoff (the DC bus or signal voltage it sits across without conducting), the 103 V clamp gives roughly 60 % headroom above the normal rail.
Breakdown window and peak current — the protection envelope
Breakdown occurs between 71.3 V minimum and the clamp voltage, with a peak pulse current rating of 14.8 A into that 103 V clamp. That current number is the 10/1000 µs surge it absorbs without failing short — stack it against the expected transient energy in your application.
DO-201 axial through-hole — board-fit and temperature range
Housed in a DO-201AA (DO-27) axial leaded package, the 1.5KE75CA/B mounts through-hole and is supplied in bulk box packaging. The -55 °C to +150 °C junction temperature range covers industrial enclosures and under-hood automotive ambient without derating the peak pulse power at the high end — the 1500 W rating holds across the full temperature band.
YAGEO lists the 1.5KE75CA/B as Active, so there is no last-time-buy clock or obsolescence risk for current or new designs. No power line protection (it is intended for signal and DC rail clamping, not mains) — confirm the 64.1 V standoff matches your rail voltage before specifying.