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Littelfuse Inc. 1.5SMC6.8AT3G — Circuit Protection

Littelfuse 1.5SMC6.8AT3G TVS Diode, 1500W Peak, DO-214AB

MPN1.5SMC6.8AT3G
Obsolete

Littelfuse 1.5SMC series Zener TVS diode, 1.5SMC6.8AT3G, unidirectional, 5.8V standoff, 6.45V breakdown, 10.5V clamping, 143A peak pulse, 1500W, -65°C to 150°C junction, DO-214AB SMC, surface mount.

$0.6500Ref. price · indicative, final on quote
Littelfuse Inc. 1.5SMC6.8AT3G datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5SMC6.8AT3G specifications
ParameterValue
TypeZener
Series1.5SMC
MountingSurface 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

DO-214AB SMC TVS — what the voltage window means on the board

The 1.5SMC6.8AT3G is a unidirectional Zener-type TVS in the DO-214AB (SMC) package — a standard SMB-footprint device that lands on a 3.5 mm × 2.9 mm pad pattern familiar to any power-supply layout. The 1500 W peak pulse power rating is the defining number for this series — it tells you the diode survives a single 10/1000 µs surge event without degradation at the rated current.

Junction temperature grade and mounting

The supplier device package is SMC; the part mounts surface mount, so reflow profile and MSL sensitivity follow the standard moisture sensitivity level for this form factor.

Frequently asked questions

What series does the 1.5SMC6.8AT3G belong to?

It is part of Littelfuse's 1.5SMC series — a 1500 W peak pulse power TVS diode family in the DO-214AB SMC package. The series covers a range of standoff and breakdown voltages, all sharing the same footprint and peak pulse rating.

What is the difference between standoff, breakdown, and clamping voltage on this part?

The 5.8 V standoff is the continuous reverse voltage the diode blocks in normal operation. The 6.45 V minimum breakdown is where it begins conducting in the Zener region. The 10.5 V maximum clamping voltage is what appears across the diode terminals when the 143 A peak pulse current is flowing — that is the let-through spike the protected circuit sees during a transient event.