TPSMC22AHE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMC22AHE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the PAR® series. This surface mount component in DO-214AB (SMCJ) packaging is designed for transient voltage protection applications. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

TPSMC22AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1145TPSMC22AHE3_A/I Datasheet

Current PartRFQ

1.5SMC22A-E3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 26731.5SMC22A-E3/57T Datasheet

DirectRFQ

1.5SMC22A-M3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 7121.5SMC22A-M3/57T Datasheet

DirectRFQ

SM15T22A-M3/9AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 753SM15T22A-M3/9AT Datasheet

DirectRFQ

TPSMC22AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 898TPSMC22AHE3_B/I Datasheet

DirectRFQ

SM15T22A

STMicroelectronicsIn Stock: 20214SM15T22A Datasheet

MFR RecommendedRFQ

SM15T22AY

STMicroelectronicsIn Stock: 57934SM15T22AY Datasheet

MFR RecommendedRFQ

SZ1.5SMC22AT3G

Littelfuse Inc.In Stock: 30180SZ1.5SMC22AT3G Datasheet

MFR RecommendedRFQ

TPSMC22A

Littelfuse Inc.In Stock: 1316TPSMC22A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TPSMC22AHE3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 18.8V
• Voltage - Breakdown (Min): 20.9V
• Voltage - Clamping (Max) @ Ipp: 30.6V
• Current - Peak Pulse (10/1000µs): 49A
• Power - Peak Pulse: 1500W (1.5kW)
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Unidirectional Channels: 1

Substitute parts are grouped into two categories:

Category A: Direct Electrical & Mechanical Equivalents (Vishay & Littelfuse) These parts maintain identical electrical specifications and package form factor. They differ only in product status (active vs. obsolete) or packaging format (bulk vs. tape & reel).

Category B: Functionally Compatible Alternatives (STMicroelectronics) These parts maintain the same reverse standoff voltage, breakdown voltage, and package form factor. However, they exhibit different clamping voltage and peak pulse current specifications due to different device architecture (8/20µs pulse vs. 10/1000µs pulse definition).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

TPSMC22AHE3_B/I is the primary direct replacement. It maintains automotive grade qualification (AEC-Q101), identical operating temperature range (-65°C ~ 185°C), and all electrical specifications. Product status is active, ensuring long-term availability.

SZ1.5SMC22AT3G (Littelfuse) and TPSMC22A (Littelfuse) provide equivalent electrical performance with automotive qualification. Operating temperature range is reduced to -55°C or -65°C respectively, which may be acceptable depending on application requirements.

The Vishay 1.5SMC series (1.5SMC22A-E3/57T, 1.5SMC22A-M3/57T) and SM15T22A-M3/9AT offer identical electrical specifications but lack automotive grade designation. These are suitable for non-automotive applications or where automotive qualification is not required.

For Applications Tolerating Different Clamping Characteristics:

SM15T22A and SM15T22AY (STMicroelectronics) maintain the same reverse standoff and breakdown voltages but exhibit higher clamping voltage (39.3V vs. 30.6V) and significantly higher peak pulse current (254A vs. 49A) due to different pulse definition standards (8/20µs vs. 10/1000µs). SM15T22AY includes automotive qualification (AEC-Q101). These parts are suitable only when circuit design accommodates the higher clamping voltage specification.

Frequently Asked Questions (FAQ)

Q: Can I use 1.5SMC22A-E3/57T as a direct replacement for TPSMC22AHE3_A/I?

A: Electrically, yes. The 1.5SMC22A-E3/57T maintains identical voltage and current specifications. However, it lacks automotive grade qualification and has a reduced operating temperature range (-65°C ~ 150°C vs. -65°C ~ 185°C). Use this part only if your application does not require automotive qualification and operates within the reduced temperature range.

Q: What is the difference between TPSMC22AHE3_B/I and TPSMC22AHE3_A/I?

A: The primary difference is product status: TPSMC22AHE3_A/I is obsolete, while TPSMC22AHE3_B/I is active. All electrical specifications, operating temperature range, and automotive qualifications are identical. TPSMC22AHE3_B/I is the recommended replacement for the obsolete part.

Q: Why do SM15T22A and SM15T22AY have different clamping voltages?

A: These STMicroelectronics parts use different pulse test conditions (8/20µs) compared to the Vishay and Littelfuse parts (10/1000µs). This results in measured clamping voltage of 39.3V versus 30.6V. The parts are not electrically equivalent for applications sensitive to clamping voltage specification.

Q: Can I use SZ1.5SMC22AT3G in an automotive application?

A: Yes. SZ1.5SMC22AT3G carries automotive grade qualification (AEC-Q101) and maintains all electrical specifications of the original part. Operating temperature range is -65°C ~ 150°C, which is acceptable for most automotive applications. Verify that your specific application does not require the extended upper temperature range of the original part (-65°C ~ 185°C).

Q: What does "DO-214AB (SMCJ)" packaging mean?

A: DO-214AB is the industry standard package designation for surface mount diodes in this power class. SMCJ is the supplier-specific package code used by Vishay. SMC is the equivalent designation used by other manufacturers. All these designations refer to the same physical package form factor and are mechanically and electrically interchangeable.

Q: Is TPSMC22A from Littelfuse a suitable replacement?

A: Yes, with minor considerations. TPSMC22A maintains identical electrical specifications and automotive qualification (AEC-Q101). Peak pulse current is specified as 49.7A versus 49A, which is within normal manufacturing tolerance. Operating temperature range is -55°C ~ 150°C, which is narrower than the original part. Use this part if your application operates within this temperature range.