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Taiwan Semiconductor Corporation 1.5KE91AH — Circuit Protection
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Taiwan Semiconductor Corporation / Circuit Protection

1.5KE91AH Taiwan Semiconductor Zener TVS, 1500W, DO-201

MPN 1.5KE91AH
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Taiwan Semiconductor 1.5KE series Zener TVS diode, 1.5KE91AH, 1500W peak pulse power, 77.8V reverse standoff, 86.5V breakdown, 125V clamping, DO-201AA axial through-hole, AEC-Q101 automotive grade.

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Full Technical Specifications

15 Parameters
1.5KE91AH specifications
Parameter / AttributeSpecification / Value
TypeZener
Series1.5KE
MountingThrough Hole
Voltage - breakdown86.5V
Voltage - clamping (Max) @ ipp125V
Voltage - reverse standoff77.8V
Current - peak pulse (10/1000μs)12.6A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-55°C ~ 175°C (TJ)
GradeAutomotive
PackageTape & Reel (TR)
QualificationAEC-Q101
CaseDO-201AA, DO-27, Axial
Unidirectional channels1
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Technical Details & Description

Zener TVS for automotive 77.8V rail protection

The 1.5KE91AH: Its 86.5V minimum breakdown voltage and 125V maximum clamping at 12.6A peak pulse current (10/1000µs waveform) define the protection envelope for 12V, 24V, and 48V automotive systems where the steady-state voltage stays below 77.8V. AEC-Q101 qualification confirms the part meets automotive-grade stress tests: temperature cycling, high-temperature reverse bias, and ESD robustness.

Package and board-fit for DO-201 axial mounting

The 1.5KE91AH ships in tape and reel, suitable for automated insertion or hand-solder rework. The axial leads require a 0.036-inch (0.9 mm) diameter hole on a 0.400-inch (10.16 mm) lead spacing — confirm the PCB layout matches before committing the BOM line.

Frequently asked questions

What are the key clamping specifications for 1.5KE91AH?

Peak pulse power is 1500W. These ratings define the protection window for a 77.8V nominal rail.

1.5KE91AH
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