DO-201 axial TVS — 1500 W clamp for 70 V rails
The 1.5KE82CA/B: The DO-201AA (DO-27) axial-lead package suits through-hole assembly on power supply boards, motor-drive terminals, or battery-charger outputs where the TVS sits across the DC bus. The bidirectional channel means a single device clamps both polarities — no need to series a pair for AC-coupled lines or reverse-battery events.
Clamping voltage and peak current — what the ratings mean for the rail
The 113 V clamping voltage at 13.5 A peak pulse current (10/1000 µs) sets the maximum voltage the downstream components see during a transient. For a 70 V nominal bus, the 43 V headroom between standoff and clamp gives the TVS room to absorb energy without the rail exceeding the breakdown of 100 V-rated MOSFETs or electrolytics — provided the PCB trace inductance does not add another 10-15 V of L di/dt overshoot. Breakdown voltage min is 77.9 V, so the TVS starts conducting before the rail reaches 80 V. The 1500 W peak pulse rating means it can handle a single high-energy surge — a 24 V battery system hit with a load-dump transient — without failing short. For repetitive surges, derate the peak power per the pulse-train curve in the datasheet.
The DO-201 axial package is a mature, widely stocked form factor. Reels and box quantities are available; the box packaging suits low-volume assembly or MRO kitting where tape-and-reel is not required. Store the devices in a dry environment — the axial leads are solderable without special bake-out, but the epoxy body absorbs moisture over long shelf storage.