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Taiwan Semiconductor Corporation 1.5KE39A A0G — Circuit Protection

1.5KE39A A0G TVS Diode, 1500W, 33.3V Standoff, DO-201

MPN1.5KE39A A0G
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Taiwan Semiconductor 1.5KE39A A0G Zener TVS diode, 1.5KE series, 1500W peak pulse power, 33.3V reverse standoff, 53.9V clamping, unidirectional, DO-201 axial, through hole.

Taiwan Semiconductor Corporation 1.5KE39A A0G datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1.5KE39A A0G specifications
ParameterValue
TypeZener
Series1.5KE
MountingThrough Hole
Voltage - breakdown37.1V
Voltage - clamping (Max) @ ipp53.9V
Voltage - reverse standoff33.3V
Current - peak pulse (10/1000μs)29A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-55°C ~ 175°C (TJ)
PackageTape & Box (TB)
ApplicationsGeneral Purpose
CaseDO-201AA, DO-27, Axial
Unidirectional channels1

Product details

1500 W surge clamp for a 33.3 V rail

The 1.5KE39A A0G: With a 33.3 V reverse standoff voltage, it protects a 24 V or 28 V DC bus from transients without conducting at the nominal rail. Breakdown occurs at 37.1 V minimum, and the diode clamps at 53.9 V maximum while shunting 29 A of peak pulse current. This window keeps the protected circuit below its absolute-maximum rating during a surge event.

DO-201 axial — board-level transient protection

Operating from -55 °C to 175 °C, the diode suits both industrial control cabinets and under-hood automotive environments where ambient temperatures can reach 125 °C. The wide junction range means derating is minimal until the case temperature exceeds 100 °C.

No power line protection — the diode is intended for DC bus or signal-line clamping, not AC mains surge suppression. Confirm the 33.3 V standoff matches your rail voltage before committing the BOM line.

Frequently asked questions

What is the peak pulse power rating of the 1.5KE39A A0G?

The 1.5KE39A A0G is rated for 1500 W (1.5 kW) peak pulse power on a 10/1000 µs exponential waveform. This means it can clamp a 29 A surge at 53.9 V for that pulse duration without exceeding the junction temperature limit.

What voltage rail does the 1.5KE39A A0G protect?

With a 33.3 V reverse standoff voltage, the diode is designed to protect a 24 V or 28 V DC bus. It does not conduct at the nominal rail voltage, starts breaking down at 37.1 V, and clamps transients at 53.9 V maximum.

What package does the 1.5KE39A A0G come in?

The diode is supplied in a DO-201AA (DO-27) axial-lead through-hole package. The supplier device package is DO-201. It ships in Tape & Box (TB) format.