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Taiwan Semiconductor Corporation 1.5KE9.1A R0G — Circuit Protection

1.5KE9.1A R0G TVS Diode, 1500W, 7.78V Standoff, DO-201

MPN1.5KE9.1A R0G
Active

Taiwan Semiconductor Corporation 1.5KE series Zener TVS diode, 1.5KE9.1A R0G, 1500W peak pulse power, 7.78V reverse standoff, 13.4V clamping, 117A Ipp, DO-201AA axial, unidirectional.

$0.2006Ref. price · indicative, final on quote
Taiwan Semiconductor Corporation 1.5KE9.1A R0G datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1.5KE9.1A R0G specifications
ParameterValue
TypeZener
Series1.5KE
MountingThrough Hole
Voltage - breakdown8.65V
Voltage - clamping (Max) @ ipp13.4V
Voltage - reverse standoff7.78V
Current - peak pulse (10/1000μs)117A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-55°C ~ 175°C (TJ)
PackageTape & Reel (TR)
ApplicationsGeneral Purpose
CaseDO-201AA, DO-27, Axial
Unidirectional channels1

Product details

1500W Zener TVS in a DO-201 axial package

The 1.5KE9.1A R0G: It clamps a transient at 13.4V maximum when the surge current hits 117A, which is the peak pulse current it can handle without failing. The reverse standoff voltage is 7.78V, meaning the diode stays out of the circuit below that rail voltage and only starts conducting when the transient exceeds the minimum breakdown voltage of 8.65V.

Power line protection is not supported — this is a unidirectional device intended for DC rail clamping, not AC mains.

Frequently asked questions

What is the peak pulse current rating of the 1.5KE9.1A R0G?

The peak pulse current (Ipp) is 117A for a 10/1000µs waveform, at which point the clamping voltage reaches 13.4V maximum. This is the surge the diode can absorb without damage under the standard test condition.

What package does the 1.5KE9.1A R0G use?

It comes in a DO-201AA axial-lead package (also referred to as DO-27), rated for through-hole mounting. The body is the same size as the standard 1.5KE series footprint.