SMBJ33A-TP Equivalent & Substitute Parts

Part Overview

The SMBJ33A-TP is a unidirectional transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 33V reverse standoff voltage and provides 600W peak pulse power dissipation in a DO-214AA (SMB) package. The part is active in production and RoHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

SMBJ33A-TP

Micro Commercial CoIn Stock: 1464SMBJ33A-TP Datasheet

Current PartRFQ

1SMB33A TR13 PBFREE

Central Semiconductor CorpIn Stock: 29681SMB33A TR13 PBFREE Datasheet

DirectRFQ

SMBJ33A

Good-Ark SemiconductorIn Stock: 17220SMBJ33A Datasheet

DirectRFQ

SMBJ33A

Good-Ark SemiconductorIn Stock: 17220SMBJ33A Datasheet

DirectRFQ

SMBJ33A

Good-Ark SemiconductorIn Stock: 17220SMBJ33A Datasheet

DirectRFQ

SMBJ33A-13-F

Diodes IncorporatedIn Stock: 1773SMBJ33A-13-F Datasheet

DirectRFQ

SMBJ33A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 10204SMBJ33A-E3/52 Datasheet

DirectRFQ

SMBJ33A-M3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 8671SMBJ33A-M3/52 Datasheet

DirectRFQ

SMBJ33A-TR

STMicroelectronicsIn Stock: 5301SMBJ33A-TR Datasheet

SimilarRFQ

SZ1SMB33AT3G

LittelfuseIn Stock: 16705SZ1SMB33AT3G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ33A-TP are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff: 33V
• Voltage - Breakdown (Min): 36.7V
• Voltage - Clamping (Max) @ Ipp: 53.3V
• Current - Peak Pulse (10/1000µs): 11.3A (±0.5A tolerance acceptable)
• Power - Peak Pulse: 600W
• Type: Zener, Unidirectional
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Acceptable Variations:

• Manufacturer: Different manufacturers with identical electrical specifications
• Operating Temperature Range: Minimum -55°C acceptable; maximum 150°C or higher acceptable
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® are interchangeable for component selection
• Series Designation: Different manufacturer series names (TransZorb®, TRANSIL™) do not affect substitution eligibility

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain identical electrical performance specifications for the critical parameters: 33V reverse standoff voltage, 36.7V minimum breakdown voltage, 53.3V maximum clamping voltage, 11.3A peak pulse current, and 600W peak pulse power. All parts are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating.

Direct Equivalents (Identical Specifications): 1SMB33A TR13 PBFREE, SMBJ33A (Good-Ark), SMBJ33A-13-F, SMBJ33A-E3/52, SMBJ33A-M3/52, and SZ1SMB33AT3G are direct functional equivalents with no electrical parameter deviations.

Near-Equivalent (Minor Peak Current Variation): SMBJ33A-TR (STMicroelectronics) specifies 11.8A peak pulse current versus the 11.3A baseline. This 0.5A increase remains within acceptable tolerance for general-purpose TVS applications and does not compromise circuit protection.

Temperature Range Consideration: The SMBJ33A-TP operates to 175°C maximum junction temperature. Substitute parts from Central Semiconductor Corp (1SMB33A TR13 PBFREE) and Littelfuse (SZ1SMB33AT3G) specify 150°C maximum. Selection should confirm application thermal requirements do not exceed 150°C junction temperature for these alternatives.

All parts are active in production status and available in standard packaging formats (Tape & Reel or Cut Tape).

Frequently Asked Questions (FAQ)

Q: Can I substitute SMBJ33A-TR for SMBJ33A-TP if the peak current specification differs? A: Yes. SMBJ33A-TR specifies 11.8A peak pulse current compared to 11.3A for SMBJ33A-TP. The 0.5A increase provides additional current handling margin and does not degrade circuit protection performance. Both parts maintain identical voltage specifications (33V standoff, 53.3V clamping).

Q: Are there temperature limitations when using substitute parts? A: The SMBJ33A-TP operates to -55°C ~ 175°C junction temperature. Substitute parts 1SMB33A TR13 PBFREE and SZ1SMB33AT3G are rated to -65°C ~ 150°C. If your application requires operation above 150°C junction temperature, use SMBJ33A (Good-Ark), SMBJ33A-13-F, SMBJ33A-E3/52, SMBJ33A-M3/52, or SMBJ33A-TR, which all support -55°C ~ 150°C or higher.

Q: Do packaging format differences (Tape & Reel vs. Cut Tape) affect electrical performance? A: No. Packaging format differences do not affect component electrical specifications or performance. Tape & Reel and Cut Tape & Digi-Reel® formats are interchangeable for circuit design purposes. Selection should be based on assembly equipment compatibility and procurement requirements.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts carry RoHS3 compliance certification and MSL 1 (Unlimited) moisture sensitivity rating, matching the SMBJ33A-TP specifications.

Q: Can I use SZ1SMB33AT3G (Littelfuse) as a direct replacement? A: Yes. SZ1SMB33AT3G is a direct electrical equivalent with identical voltage and current specifications. This part carries AEC-Q101 automotive qualification and is suitable for both commercial and automotive applications.

Q: What is the significance of manufacturer series names like TransZorb® or TRANSIL™? A: Series names are manufacturer branding designations and do not affect substitution eligibility. Parts designated as TransZorb® (Vishay) or TRANSIL™ (STMicroelectronics) meet identical electrical specifications and are fully interchangeable with parts from other manufacturers.