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Littelfuse Inc. 1.5KE510A-B — Circuit Protection

1.5KE510A-B Littelfuse TVS Diode, 1500W, DO-201

MPN1.5KE510A-B
Active

Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE510A-B, 1500W peak pulse power, 434V standoff, 698V clamp, DO-201AA axial, bulk.

$0.4451Ref. price · indicative, final on quote
Littelfuse Inc. 1.5KE510A-B datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1.5KE510A-B specifications
ParameterValue
TypeZener
Series1.5KE
MountingThrough Hole
Voltage - breakdown485V
Voltage - clamping (Max) @ ipp698V
Voltage - reverse standoff434V
Current - peak pulse (10/1000μs)2.1A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-55°C ~ 175°C (TJ)
PackageBulk
ApplicationsGeneral Purpose
CaseDO-201AA, DO-27, Axial
Unidirectional channels1

Product details

1500 W peak pulse — the surge rating that defines the protection

The 1.5KE510A-B is a 1500 W (1.5 kW) peak pulse power Zener TVS diode from Littelfuse's 1.5KE series, designed to clamp transients on AC or DC power rails. That 698 V clamp is the ceiling the downstream circuitry must survive — a power supply or MOV rated for 700 V+ gives you margin.

Through-hole DO-201 — board-fit and thermal path

Housed in a DO-201AA (DO-27) axial leaded package, the 1.5KE510A-B mounts through-hole, with the cathode band marking the unidirectional orientation.