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Littelfuse Inc. 1.5KE170-B — Circuit Protection

Littelfuse 1.5KE170-B TVS Diode, 1500W, Unidirectional

MPN1.5KE170-B
Obsolete

Littelfuse Inc. 1.5KE series TVS Zener diode, 1.5KE170-B, unidirectional, 1500W peak pulse power, 145V reverse standoff, DO-201AA axial-lead package, bulk.

$0.6700Ref. price · indicative, final on quote
Littelfuse Inc. 1.5KE170-B datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5KE170-B specifications
ParameterValue
TypeZener
Series1.5KE
MountingThrough Hole
Voltage - breakdown153.45V
Voltage - clamping (Max) @ ipp245.7V
Voltage - reverse standoff145V
Current - peak pulse (10/1000μs)6.5A
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 axial-lead TVS — what the ratings mean for your rail

The 1.5KE170-B: With a 145 V reverse standoff voltage, it sits across a 120 VAC or 145 VDC bus and stays transparent until a transient drives the voltage past the 153.45 V breakdown threshold. The 245.7 V clamping voltage limits the peak to 6.5 A of pulse current, protecting downstream semiconductors from avalanche failure. The DO-201AA axial-lead package (also known as DO-27) is a through-hole form factor that handles the thermal pulse of a 1500 W surge without derating.

Obsolete — sourcing through independent channels

Littelfuse lists the 1.5KE170-B as obsolete. No official successor part number is published.

Frequently asked questions

How can I order the 1.5KE170-B or check stock?

The 1.5KE170-B is obsolete but available through independent distribution. Submit an RFQ with your target quantity and preferred date-code range; we confirm availability, pricing, and packaging condition (sealed reel, bulk, or cut tape) at quote time.