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STMicroelectronics P6KE18ARL — Circuit Protection

STMicroelectronics P6KE18ARL Zener TVS, 600W, DO-15

MPNP6KE18ARL
Obsolete

STMicroelectronics P6KE, TRANSIL™ series, Zener TVS, 600W peak pulse, 15.3V standoff, 32.5V clamp, 123A (8/20µs), DO-204AC (DO-15) axial, through hole, obsolete.

STMicroelectronics P6KE18ARL datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

P6KE18ARL specifications
ParameterValue
TypeZener
SeriesP6KE, TRANSIL™
MountingThrough Hole
Voltage - breakdown17.1V
Voltage - clamping (Max) @ ipp32.5V
Voltage - reverse standoff15.3V
Current - peak pulse (10/1000μs)123A (8/20µs)
Power - peak pulse600W
Power line protectionNo
Capacitance @ frequency1600pF @ 1MHz
PackageTape & Reel (TR)
ApplicationsGeneral Purpose
CaseDO-204AC, DO-15, Axial
Unidirectional channels1

Product details

600W TRANSIL™ — what it protected and why it's gone

The STMicroelectronics P6KE18ARL is a 600W peak-pulse Zener TVS diode from the P6KE, TRANSIL™ series, designed to clamp transients on a 15.3V rail. Its 17.1V minimum breakdown and 32.5V maximum clamping define the protection window — any spike above 32.5V gets clipped, and the device absorbs 123A (8/20µs waveform) without failing. That 1600pF capacitance at 1MHz is typical for this power level, so it's not a candidate for high-speed data lines, but it's fine for DC power buses, relay coils, and general-purpose board-level transient suppression in industrial or telecom gear.

STMicroelectronics lists the P6KE18ARL as obsolete. The replacement search is the most common question we get on this part, and it's addressed in the FAQ below.

Frequently asked questions

What is the replacement for P6KE18ARL?

There is no official STMicroelectronics successor for the P6KE18ARL. The closest functional replacement is another P6KE-series part with the same standoff voltage and package — look for a P6KE18A variant in DO-15 (axial) with a 15.3V standoff and 600W rating. Verify the breakdown and clamping voltages match your design's protection window before substituting.