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Taiwan Semiconductor Corporation 1.5KE51CAH — Circuit Protection

1.5KE51CAH TVS Diode, 1500W, AEC-Q101, DO-201

MPN1.5KE51CAH
Active

Taiwan Semiconductor Corporation 1.5KE series bidirectional Zener TVS diode, 1.5KE51CAH, 1500W peak pulse power, 43.6V reverse standoff, DO-201AA axial package, AEC-Q101 qualified.

$0.5792Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1.5KE51CAH specifications
ParameterValue
TypeZener
Series1.5KE
MountingThrough Hole
Voltage - breakdown48.5V
Voltage - clamping (Max) @ ipp70.1V
Voltage - reverse standoff43.6V
Current - peak pulse (10/1000μs)22A
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
Bidirectional channels1

Product details

Automotive-grade transient suppression for 43.6 V rails

The 1.5KE51CAH: Its 43.6 V reverse standoff voltage and 48.5 V minimum breakdown voltage clamp transients to 70.1 V at 22 A peak pulse current, protecting a nominal 43.6 V DC rail from load-dump and inductive kickback events.

Housed in a DO-201AA (DO-27) axial-lead through-hole package, the 1.5KE51CAH mounts with standard 0.042-inch diameter leads. The DO-201 footprint is shared across the 1.5KE series, so a single PCB layout serves multiple voltage variants. Tape-and-reel packaging supports automated insertion for high-volume assembly.