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Microchip Technology SMBJ28AE3/TR13 — Circuit Protection

SMBJ28AE3/TR13 – Microchip 600W Zener TVS Diode

MPNSMBJ28AE3/TR13
Active

Microchip Technology SMBJ28AE3/TR13, Zener TVS diode, 600W peak pulse power, 28V reverse standoff, 45.4V clamping, DO-214AA (SMB) surface-mount package, Tape & Reel.

$0.2850Ref. price · indicative, final on quote
Microchip Technology SMBJ28AE3/TR13 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMBJ28AE3/TR13 specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown31.1V
Voltage - clamping (Max) @ ipp45.4V
Voltage - reverse standoff28V
Current - peak pulse (10/1000μs)13.2A
Power - peak pulse600W
Power line protectionNo
Operating temperature-65°C~150°C(TJ)
PackageTape & Reel (TR)
ApplicationsGeneral Purpose
CaseDO-214AA, SMB
Unidirectional channels1

Product details

28V rail protection – breakdown and clamping window

This is a Zener-type TVS diode designed to protect a single unidirectional channel on a 28V nominal rail. The reverse standoff voltage is 28V – the rail can run at 28V without the diode conducting. Breakdown starts at 31.1V min, and clamping is specified at 45.4V max at the peak pulse current of 13.2A (10/1000µs waveform). That 45.4V ceiling is the voltage the protected circuitry must survive during a surge event.

600W peak pulse – sizing the protection budget

That 600W is the product of the clamping voltage and the peak current – it tells you the diode can absorb a 13.2A surge without failing. For a 28V rail in industrial or telecom gear, this is a common protection tier. If your transient energy exceeds 600W for the given pulse shape, you need a larger device.

DO-214AA SMB – surface-mount assembly

Housed in a DO-214AA (SMB) package, surface-mount. The SMB footprint is larger than the smaller SMA but still compact enough for dense boards. The tape-and-reel delivery suits automated pick-and-place.

Frequently asked questions

Where can I buy SMBJ28AE3/TR13 and how do I get a price?

The SMBJ28AE3/TR13 is an active Microchip part available through our distribution channel. Submit an RFQ with your target quantity – we source against the BOM line and confirm current pricing and lead time at quote time. No stock-holding claim is made here; availability is confirmed per order.

What is the difference between SMBJ28A and SMBJ28AE3?

The '' suffix on SMBJ28AE3/TR13 typically indicates a lead-free / RoHS-compliant finish. The base electrical specs – 28V standoff, 31.1V breakdown, 45.4V clamping, 600W peak pulse – are identical between the two variants. The SMBJ28A (non-) may use a tin-lead plating. Confirm the specific datasheet for your exact suffix to verify RoHS status and plating material.

Does SMBJ28AE3/TR13 work for a 24V DC rail?

Yes. The 28V reverse standoff is above 24V, so the diode will not conduct during normal operation. The 31.1V minimum breakdown gives margin before the diode starts clamping. For a 24V rail, this is a standard TVS selection – the clamp triggers only during overvoltage events.