Transient protection for signal and low-power DC rails
The 1.5KE24A-B: The through-hole DO-201 axial package suits point-to-point wiring on terminal strips or PCB through-hole layouts where a replacement part must drop into an existing board without a layout change.
Clamping window and breakdown margin
The minimum breakdown voltage is 22.8 V, giving a 2.3 V margin above the 20.5 V standoff — enough to avoid false triggering from normal rail ripple while clamping before the protected device's absolute maximum rating is exceeded.
Obsolete — sourcing through independent channels
Sourcing is limited to independent distribution and surplus inventory, where each lot is verified for authenticity and tested to the original datasheet limits before shipment.