Key TVS ratings and what they mean for circuit protection
The 1.5KE33C-B: The 28.2 V reverse standoff voltage means the device does not conduct at normal rail voltage up to that level; it clamps transients at 47.99 V max while shunting 33.3 A peak current. Bidirectional (single channel) — a single DO-201 package protects against both positive and negative surges, simplifying the BOM for AC lines or bipolar DC rails where polarity is not fixed.
Package and board-fit — DO-201 axial leaded
The 0.052-inch lead diameter fits standard 1.0 mm PCB holes; the body is 9.1 mm long, so axial lead forming or vertical mounting is required for dense layouts. Supplied in bulk (tube or bag) — not tape-and-reel, so hand-insertion or tube-fed auto-insertion is the assembly path. No power line protection (no internal filter); this is a pure transient clamp for signal or secondary DC rails.