Automotive-grade 1.5 kW TVS in a through-hole package
The 1.5KE51CAHB0G: It clamps a transient at 70.1 V max while conducting 22 A peak pulse current, protecting a 43.6 V nominal rail from surges that exceed the breakdown threshold of 48.5 V min. Qualified to AEC-Q101, this part is intended for automotive electronics where the under-hood or chassis-mounted ECU sees repetitive load-dump and inductive-switching transients.
What the clamping and standoff ratings mean for the BOM
A 48 V nominal bus that sees 44 V during normal operation stays below this threshold; the TVS remains transparent until a surge drives the line above 48.5 V breakdown. At the 22 A peak pulse current (10/1000 µs), the clamping voltage is 70.1 V max. For a downstream device rated at 60 V abs-max, this clamp leaves 10 V of margin—enough to survive a single high-energy pulse without secondary protection. The 1500 W rating is the product of clamp voltage and peak current, so a shorter pulse (e.g. 8/20 µs) allows higher peak current before the die reaches its thermal limit.
Through-hole DO-201 and board integration
The DO-201AA (DO-27) axial-lead package is a standard through-hole form factor. It mounts into a 1.0 mm (0.040 inch) diameter plated-through hole on a PCB or terminal block; the lead bend radius should stay above 1.5 mm to avoid cracking the glass passivation at the body exit. The bulk packaging means the parts ship loose in a tube or bag—no reel, so pick-and-place requires manual or tube-fed insertion.