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onsemi 1N6281A — Circuit Protection

1N6281A Zener TVS Diode – 1500W, 23.1V Standoff, DO-201AD

MPN1N6281A
Obsolete

onsemi Mosorb™ series, 1N6281A Zener TVS diode, 1500W peak pulse power, 23.1V reverse standoff, DO-201AD axial package, through-hole mount.

$0.8100Ref. price · indicative, final on quote
onsemi 1N6281A datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1N6281A specifications
ParameterValue
TypeZener
SeriesMosorb™
MountingThrough Hole
Voltage - breakdown25.7V
Voltage - clamping (Max) @ ipp37.5V
Voltage - reverse standoff23.1V
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-65°C~175°C(TJ)
PackageBulk
ApplicationsGeneral Purpose
CaseDO-201AD, Axial
Unidirectional channels1

Product details

Transient protection for 24V rails – 1500W peak pulse power

That 1500W rating is the energy-handling ceiling for an 8/20 µs surge waveform – enough to clamp transients on a 24V DC bus without exceeding the 37.5V clamping voltage. The 23.1V standoff sits comfortably below a 24V nominal rail, so the diode stays off during normal operation and only conducts when a surge pushes the line above the breakdown threshold.

onsemi lists the 1N6281A as Obsolete. No power line protection feature – this is a standard Zener TVS, not a crowbar or a filtered suppressor. The application is general-purpose transient clamping on signal or low-power DC lines.

Package and mounting – DO-201AD axial checklist

The DO-201AD axial package is a through-hole, leaded form factor. The body diameter and lead spacing are standard for this JEDEC outline – the hole diameter on the PCB should match the lead diameter from the datasheet drawing to avoid solder-joint cracking under thermal cycling. Hand-solder or wave-solder only.

Frequently asked questions

How can I order the 1N6281A or check availability?

We source it through our independent supply network – submit an RFQ with your target quantity and we will confirm availability and current pricing at quote time. No stock-holding claim is made here.

What is the replacement for the 1N6281A?

onsemi has not published an official successor for the 1N6281A. For a 23.1V standoff, 1500W Zener TVS in a DO-201AD package, common cross-shopped alternatives include the 1.5KE24A series from various manufacturers – but verify the breakdown voltage window and clamping spec against your surge requirement before substituting.