1.5KE11ARL4 – Obsolete Zener TVS, Sourcing Reality
The 1.5KE11ARL4 is an onsemi Mosorb™ Zener TVS diode in a DO-201AD axial package, rated for 1500W peak pulse power at 10/1000µs waveform. It provides unidirectional transient suppression with a 9.4V reverse standoff voltage, a minimum breakdown of 10.5V, and a maximum clamping voltage of 15.6V at 96A peak pulse current. This part is now listed as Obsolete by onsemi, meaning onsemi no longer manufactures it. Any procurement must come from existing distributor or broker inventory, and the BOM line should be evaluated for a form-fit-function replacement.
Key Ratings for Replacement Matching
The 1500W peak pulse power is the energy-handling ceiling — a substitute must meet or exceed this rating to maintain the same surge protection level. The 9.4V reverse standoff voltage sets the maximum continuous DC voltage the TVS can block without conducting. The 10.5V minimum breakdown and 15.6V maximum clamping define the voltage window where the device activates and clamps the transient. The 96A peak pulse current is the current the device can handle during a surge event — a replacement must match or exceed this value for equivalent protection.
onsemi has classified the 1.5KE11ARL4 as Obsolete. No new production runs are planned. Buyers must source from remaining stock or identify a suitable replacement. The axial package is through-hole and widely used in general-purpose transient protection applications. Submit an RFQ for your target quantity to check inventory across our supply network.