TPSMC11AHE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMC11AHE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AB (SMC) package. This component provides transient overvoltage protection with a 9.4V reverse standoff voltage and 15.6V maximum clamping voltage at peak pulse current of 96.2A. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

TPSMC11AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 841TPSMC11AHE3_A/I Datasheet

Current PartRFQ

1.5SMC11A-E3/9AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 7651.5SMC11A-E3/9AT Datasheet

DirectRFQ

1.5SMC11A-M3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 10191.5SMC11A-M3/57T Datasheet

DirectRFQ

TPSMC11AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 741TPSMC11AHE3_B/I Datasheet

DirectRFQ

SM15T12AY

STMicroelectronicsIn Stock: 1167SM15T12AY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPSMC11AHE3_A/I is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Voltage - Reverse Standoff (Typ): 9.4V
• Voltage - Breakdown (Min): 10.5V
• Voltage - Clamping (Max) @ Ipp: 15.6V
• Current - Peak Pulse (10/1000µs): 96.2A
• Power - Peak Pulse: 1500W

Mechanical Compatibility Requirements:

• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Moisture Sensitivity Level: 1 (Unlimited)

Compliance Requirements:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

Substitute parts are grouped into two categories based on operational status and thermal performance:

Group 1 - Direct Electrical & Mechanical Equivalents (Active Status): Parts that maintain identical electrical specifications, package configuration, and compliance certifications. These include TPSMC11AHE3_B/I, 1.5SMC11A-E3/9AT, and 1.5SMC11A-M3/57T. All three parts share the same voltage ratings, peak pulse current, and power dissipation characteristics as the main part.

Group 2 - Manufacturer-Recommended Alternative (Different Electrical Specifications): The SM15T12AY from STMicroelectronics is listed as a manufacturer-recommended substitute despite differing electrical parameters. This part maintains the same package configuration and power rating but operates with different voltage and current specifications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

TPSMC11AHE3_B/I is the primary direct substitute. This part maintains all electrical specifications of the obsolete TPSMC11AHE3_A/I while offering active product status. Both parts carry automotive grade classification and AEC-Q101 qualification, ensuring equivalent reliability and compliance for automotive applications. The operating temperature range extends to 185°C, matching the original part's thermal capability.

1.5SMC11A-E3/9AT and 1.5SMC11A-M3/57T are functionally equivalent alternatives from Vishay's TransZorb® series. These parts deliver identical electrical performance across all critical parameters: 9.4V reverse standoff voltage, 15.6V clamping voltage, and 96.2A peak pulse current. Both are active products with ROHS3 compliance. The primary distinction is the reduced operating temperature range (-65 to 150°C versus -65 to 185°C), which may be limiting for applications requiring extended thermal performance.

For Alternative Applications (Different Electrical Specifications):

SM15T12AY from STMicroelectronics is designated as a manufacturer-recommended substitute but operates with different electrical characteristics. This part exhibits a higher reverse standoff voltage (10.2V), higher clamping voltage (21.7V), and significantly higher peak pulse current (461A at 8/20µs pulse width). The SM15T12AY maintains automotive grade and AEC-Q101 qualification. Selection of this part requires circuit-level analysis to confirm compatibility with the higher voltage and current ratings.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component. Automotive-grade parts (TPSMC11AHE3_B/I and SM15T12AY) carry AEC-Q101 qualification, suitable for automotive applications requiring enhanced reliability standards.

Frequently Asked Questions (FAQ)

Q: Can TPSMC11AHE3_B/I be used as a direct replacement for TPSMC11AHE3_A/I?

A: Yes. TPSMC11AHE3_B/I is a direct electrical and mechanical equivalent. Both parts share identical voltage ratings (9.4V standoff, 15.6V clamping), peak pulse current (96.2A), power dissipation (1500W), and package configuration (DO-214AB, SMC). The primary advantage of TPSMC11AHE3_B/I is its active product status, ensuring ongoing availability and supply chain support.

Q: What is the difference between 1.5SMC11A-E3/9AT and 1.5SMC11A-M3/57T?

A: Both parts are electrically identical with matching voltage and current specifications. The difference lies in packaging: 1.5SMC11A-E3/9AT is supplied in Tape & Reel format with the -E3/9AT designation, while 1.5SMC11A-M3/57T uses the -M3/57T packaging variant. Both maintain identical electrical performance and ROHS3 compliance. Selection depends on procurement and assembly requirements.

Q: Why does SM15T12AY have different electrical specifications?

A: SM15T12AY is a manufacturer-recommended alternative from STMicroelectronics designed for applications requiring higher transient current handling (461A versus 96.2A) and higher clamping voltage (21.7V versus 15.6V). This part is suitable for circuits with more severe transient conditions. Direct substitution requires circuit validation to confirm the higher voltage and current ratings are compatible with the protected circuit.

Q: Are all substitute parts automotive-qualified?

A: TPSMC11AHE3_B/I and SM15T12AY carry automotive grade classification with AEC-Q101 qualification. The 1.5SMC11A series parts (1.5SMC11A-E3/9AT and 1.5SMC11A-M3/57T) do not list automotive grade or AEC-Q101 qualification in their specifications. For automotive applications requiring AEC-Q101 compliance, TPSMC11AHE3_B/I or SM15T12AY are the appropriate selections.

Q: What is the operating temperature limitation for 1.5SMC11A series parts?

A: The 1.5SMC11A-E3/9AT and 1.5SMC11A-M3/57T parts operate within -65°C to 150°C (TJ), compared to the original TPSMC11AHE3_A/I range of -65°C to 185°C. Applications requiring operation above 150°C must use TPSMC11AHE3_B/I or SM15T12AY, both rated to 150°C or higher.

Q: Are all parts RoHS compliant?

A: Yes. All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with environmental and hazardous substance restrictions.