Obsolete 1500W Zener TVS — what the ratings mean for a replacement search
The 1.5KE210A: It is now listed as Obsolete by the manufacturer, so the primary sourcing channel is independent surplus or broker inventory — not the factory catalog.
Package, temperature grade, and fit for a through-hole board
Housed in a DO-201AA / DO-27 axial leaded package (supplier device package DO-201), the 1.5KE210A mounts through-hole. It is a single unidirectional channel — the cathode band marks the anode-to-ground orientation. Power line protection is not supported (the device is not rated for continuous AC mains clamping).
Sourcing an obsolete TVS — what to expect
With an Obsolete lifecycle status, the 1.5KE210A is no longer manufactured by Littelfuse. Availability is limited to existing surplus stock held by independent distributors — each lot is date-code specific and confirmed at RFQ. For a BOM line that requires this exact clamp voltage and package, the procurement path is a broker or surplus channel. If a board spin is acceptable, a parametric match (1500W, DO-201, 210 V standoff) from a current-production series is the longer-term alternative — but no pin-compatible second-source is documented here.