1500 W bidirectional Zener TVS — DO-201 axial, 1.5KE family
The 1.5KE22C-B: Packaged in a DO-201AA (DO-27) axial-lead through-hole case, it suits legacy board layouts where surface-mount TVS arrays are not an option. The single bidirectional channel protects against both positive and negative transients without polarity concerns on the signal or power rail.
Clamping parameters and thermal envelope for protection design
The 32.13 V maximum clamping voltage at 49.7 A peak pulse current defines the voltage the protected circuit must survive during a transient event. The 1500 W rating assumes a 25°C ambient; derate above that per the standard TVS power-temperature curve. Power line protection is not specified — this is a general-purpose TVS for signal, data, or low-voltage DC bus clamping, not for AC mains or high-energy industrial supply lines.
Obsolete — sourcing through independent distribution
Littelfuse has marked the 1.5KE22C-B as obsolete. No official successor order code is recorded in the lifecycle data. The 1.5KE series remains a widely stocked TVS family across the aftermarket, so cross-reference to a functionally equivalent bidirectional 1500 W DO-201 device from the same or a compatible series is possible — confirm the breakdown and clamping window against the original design's protection threshold before substituting.