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Taiwan Semiconductor Corporation 1.5SMC9.1A R7G — Circuit Protection

1.5SMC9.1A R7G TVS Diode, 1500W, 7.78V Standoff

MPN1.5SMC9.1A R7G
Active

Taiwan Semiconductor 1.5SMC9.1A R7G unidirectional TVS Zener, DO-214AB (SMC), 1500W peak pulse (10/1000µs), 7.78V reverse standoff, 13.4V clamping @ 117A, -55°C to 150°C junction, Tape & Reel.

Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1.5SMC9.1A R7G specifications
ParameterValue
TypeZener
Series1.5SMC
MountingSurface Mount
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 ~ 150°C (TJ)
PackageTape & Reel (TR)
ApplicationsGeneral Purpose
CaseDO-214AB, SMC
Unidirectional channels1

Product details

1500W peak pulse at 10/1000µs — what the headline rating means

The 1.5SMC9.1A R7G ships on Tape & Reel, rated for surface-mount assembly.

Standoff, clamping, and peak pulse current — the three numbers that govern TVS selection

Reverse standoff of 7.78 V defines the maximum voltage the TVS sees during normal operation without conducting. Clamping voltage of 13.4 V at peak pulse current of 117 A is what the downstream circuit is protected to during a fault event — the TVS absorbs the surge energy and clamps the voltage at that level, so the protected rail sees 13.4 V, not the raw transient. These two numbers — standoff and clamping — define the protection window and drive the selection decision for any sensitive rail at this voltage band.

Where a 1.5 kW TVS in this voltage band protects the rail

General-purpose applications across industrial control, consumer electronics, and telecom hardware all use sensitive rails in the 5–12 V band that need a TVS to clamp transients. Minimum breakdown of 8.65 V gives a tight 8% window between breakdown floor and nominal standoff (7.78 V), which is expected for a Zener-based TVS in this series.

Frequently asked questions

What series does the 1.5SMC9.1A R7G belong to and what does that mean for pin-compatible alternatives?

The 1.5SMC series is Taiwan Semiconductor's general-purpose unidirectional TVS Zener line in the DO-214AB (SMC) package. Pin-compatible alternatives within the same series share the same footprint and pinout — the choice comes down to standoff voltage and peak pulse rating matching the protected rail. Confirm the standoff voltage, clamping level, and peak pulse current against your circuit before substituting.