SM15T33A-M3/9AT Equivalent & Substitute Parts

Part Overview

The SM15T33A-M3/9AT is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 28.2V reverse standoff voltage class and provides 1500W peak pulse power dissipation for general-purpose transient protection applications. The part is active in production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the DO-214AB (SMC) package class.

Substiute Parts

SM15T33A-M3/9AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 746SM15T33A-M3/9AT Datasheet

Current PartRFQ

1.5SMC33A

Good-Ark SemiconductorIn Stock: 3001481.5SMC33A Datasheet

MFR RecommendedRFQ

1.5SMC33A

Good-Ark SemiconductorIn Stock: 3001481.5SMC33A Datasheet

MFR RecommendedRFQ

SMCJ1.5KE33A-TP

Micro Commercial CoIn Stock: 1880SMCJ1.5KE33A-TP Datasheet

MFR RecommendedRFQ

TPSMC33A

Littelfuse Inc.In Stock: 1706TPSMC33A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SM15T33A-M3/9AT are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 28.2V
• Voltage - Breakdown (Min): 31.4V
• Voltage - Clamping (Max) @ Ipp: 45.7V
• Current - Peak Pulse (10/1000µs): 32.8A to 33.3A (within tolerance)
• Power - Peak Pulse: 1500W
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener

All identified substitutes maintain these core electrical specifications and physical package compatibility, enabling direct replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

All four parts maintain active production status and ROHS3 compliance. Selection among these equivalents should be based on:

Vishay SM15T33A-M3/9AT: Original specification part with extended low-temperature operating range (-65°C minimum). Suitable for applications requiring full military or extended temperature performance.

Good-Ark 1.5SMC33A: Functionally equivalent with standard industrial temperature range (-55°C minimum). Highest inventory availability (300,100 pcs). Suitable for standard commercial applications.

Micro Commercial Co SMCJ1.5KE33A-TP: Extended high-temperature rating (-55°C to 175°C maximum). Available in Cut Tape and Digi-Reel packaging options. Suitable for elevated ambient temperature environments.

Littelfuse TPSMC33A: Automotive-grade component with AEC-Q101 qualification. REACH Affected status. Suitable for automotive and mission-critical applications requiring automotive-level reliability certification.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SM15T33A-M3/9AT with any of these parts directly?

A: Yes. All substitute parts maintain identical voltage specifications (28.2V standoff, 31.4V breakdown, 45.7V clamping) and peak pulse current ratings within tolerance (32.8A to 33.3A). All are packaged in DO-214AB (SMC) surface mount format and are electrically interchangeable.

Q: What is the difference in operating temperature ranges?

A: The SM15T33A-M3/9AT operates from -65°C to 150°C. Substitute parts operate from -55°C to 150°C (Good-Ark and Littelfuse) or -55°C to 175°C (Micro Commercial Co). Select based on your application's minimum and maximum operating temperatures.

Q: Are there packaging differences between these parts?

A: The SM15T33A-M3/9AT and Good-Ark 1.5SMC33A are supplied in Tape & Reel (TR) format. The Micro Commercial Co SMCJ1.5KE33A-TP is available in Cut Tape (CT) and Digi-Reel format. The Littelfuse TPSMC33A is supplied in Tape & Reel format. Verify packaging compatibility with your assembly process.

Q: Which substitute has the best availability?

A: Good-Ark 1.5SMC33A has the highest inventory (300,100 pcs). Littelfuse TPSMC33A has 1,607 pcs, and Micro Commercial Co SMCJ1.5KE33A-TP has 1,789 pcs available.

Q: Is the Littelfuse TPSMC33A suitable for automotive applications?

A: Yes. The Littelfuse TPSMC33A carries AEC-Q101 automotive qualification and is designated as automotive-grade, making it suitable for automotive and mission-critical applications.

Q: What does REACH Affected status mean for the Littelfuse part?

A: REACH Affected indicates the part is subject to REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) regulations. The other parts are REACH Unaffected. Verify compliance requirements for your specific application and region.