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onsemi 1.5SMC6.8AT3 — Circuit Protection
onsemi

1.5SMC6.8AT3 onsemi Zener TVS Diode – 1500W, Obsolete

MPN1.5SMC6.8AT3
Obsolete

onsemi 1.5SMC6.8AT3, Zener TVS diode, 1500W peak pulse power, 5.8V reverse standoff, unidirectional, DO-214AB SMC package

$0.5800Ref. price · indicative, final on quote
1.5SMC6.8AT3 datasheet
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

1.5SMC6.8AT3 Technical Specifications
ParameterValue
TypeZener
Mounting typeSurface Mount
Voltage - breakdown6.45V
Voltage - clamping (Max) @ ipp10.5V
Voltage - reverse standoff5.8V
Current - peak pulse (10/1000μs)143A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-65°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsGeneral Purpose
CaseDO-214AB, SMC
Unidirectional channels1

Product details

Zener TVS diode for 5.8V rail protection

The 1.5SMC6.8AT3 is a unidirectional Zener TVS diode from onsemi, rated for 1500W peak pulse power per the 10/1000µs waveform. It clamps transients on a 5.8V nominal rail to 10.5V maximum, handling a peak pulse current of 143A. This part sits in the 1.5SMC series, a common choice for general-purpose surge protection in telecom, industrial, and consumer power supplies.

Clamping voltage and breakdown margin

The minimum breakdown voltage is 6.45V, which gives a 0.65V margin above the 5.8V standoff — tight enough to avoid nuisance triggering on a regulated 5V rail, but the designer should verify the rail's tolerance against the 10.5V clamp. Operating temperature spans -65°C to 150°C junction, suiting outdoor or under-hood environments where the ambient may exceed 85°C.

Obsolete — sourcing reality for the 1.5SMC6.8AT3

onsemi lists the 1.5SMC6.8AT3 as Obsolete. For a stalled BOM line, the practical path is a last-time buy from remaining distributor stock or a cross-reference to an active 1.5SMC-series part with the same voltage rating. The DO-214AB SMC package is a standard footprint shared across many 1.5kW TVS diodes from multiple manufacturers, which opens up pin-compatible replacement options.

Frequently asked questions

Is the 1.5SMC6.8AT3 obsolete?

Yes, onsemi lists the 1.5SMC6.8AT3 as Obsolete. There is no recorded successor, so a last-time buy or a cross-reference to an active 1.5SMC-series part with the same voltage rating is the typical next step.

What is the closest pin-compatible alternative to the 1.5SMC6.8AT3?

Any active 1.5SMC-series Zener TVS diode from onsemi in the DO-214AB package with the same 5.8V standoff (e.g., 1.5SMC6.8AT3G if active) would be a direct fit. Other manufacturers like Littelfuse or Vishay offer 1.5kW SMC-package TVS diodes with matching voltage ratings — confirm the breakdown and clamping specs against your rail.