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Microchip Technology SMBJ33AE3/TR13 — Circuit Protection

SMBJ33AE3/TR13 – Microchip 33V Zener TVS Diode, 600W

MPNSMBJ33AE3/TR13
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Microchip Technology SMBJ33AE3/TR13, Zener TVS diode, 33V reverse standoff, 53.3V clamping, 600W peak pulse power, unidirectional, DO-214AA (SMB) surface-mount package, Tape & Reel.

$0.2850Ref. price · indicative, final on quote
Microchip Technology SMBJ33AE3/TR13 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMBJ33AE3/TR13 specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown36.7V
Voltage - clamping (Max) @ ipp53.3V
Voltage - reverse standoff33V
Current - peak pulse (10/1000μs)11.3A
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

Zener TVS for 33V rail protection

Breakdown and clamping window

Minimum breakdown voltage is 36.7V, and maximum clamping at peak pulse current is 53.3V. The 33V reverse standoff voltage means the diode does not conduct at the nominal rail voltage, only above the breakdown threshold. Peak pulse current is 11.3A under the 10/1000 µs test condition.

Housed in the DO-214AA (SMB) surface-mount package, the device operates over -65°C to 150°C junction temperature. The SMB footprint is common across many TVS families, easing layout reuse.

For BOM planning, this part carries no near-term obsolescence risk.

Frequently asked questions

Is SMBJ33AE3 the same as SMBJ33A?

The base product number is SMBJ33. The '' suffix typically indicates lead-free / RoHS-compliant finish. The 'TR13' suffix denotes Tape & Reel packaging. The electrical ratings (33V standoff, 36.7V breakdown, 53.3V clamping) are identical across the SMBJ33 family variants; confirm the specific suffix with the datasheet for environmental compliance.

What is the closest pin-compatible alternative to SMBJ33AE3/TR13?

Any unidirectional TVS in the DO-214AA (SMB) package with a 33V reverse standoff and similar breakdown/clamping window is a functional cross. The SMBJ33A (without suffix) from Microchip is electrically identical but may differ in lead finish. Other manufacturers' SMBJ33A-family parts in the same package are footprint-compatible; verify the clamping voltage and peak pulse current match your surge requirement.

Is SMBJ33AE3 bidirectional or unidirectional?

It is a unidirectional Zener TVS, with one channel. For bidirectional protection on AC or bipolar rails, use the SMBJ33CA family.