TPSMC39HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMC39HE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for surface mount applications in the DO-214AB (SMC) package and provides transient overvoltage protection with a 31.6V reverse standoff voltage and 56.4V maximum clamping voltage. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support.

Substiute Parts

TPSMC39HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 963TPSMC39HE3_A/I Datasheet

Current PartRFQ

TPSMC39AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1051TPSMC39AHE3_B/I Datasheet

DirectRFQ

SMCJ33A

MDDIn Stock: 92350SMCJ33A Datasheet

MFR RecommendedRFQ

SMCJ33A

MDDIn Stock: 92350SMCJ33A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMC39HE3_A/I is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Unidirectional channel configuration (1 channel required)
• Reverse standoff voltage range: 31.6V to 33.3V
• Clamping voltage range: 53.3V to 56.4V
• Peak pulse current capability: minimum 26.6A
• Peak pulse power rating: 1500W
• Operating temperature range: minimum -65°C to 185°C

Mechanical Compatibility Criteria:

• Package type: DO-214AB / SMC surface mount
• Mounting type: Surface mount

Compliance Requirements:

• RoHS3 compliance
• MSL rating: 1 (Unlimited)

The substitute parts listed below meet these criteria and are qualified for direct replacement in applications requiring TVS protection in the specified voltage and current ranges.

Parameter Comparison

Engineering Selection Recommendations

TPSMC39AHE3_B/I (Vishay): This substitute is the primary recommendation for direct replacement. It maintains the same manufacturer lineage, automotive-grade qualification (AEC-Q101), and extended operating temperature range (-65°C to 185°C). The part is currently in active production status, ensuring long-term availability. Electrical parameters are within acceptable substitution tolerances, with slightly improved peak pulse current capability (27.8A vs. 26.6A) and lower clamping voltage (53.9V vs. 56.4V), both favorable for protection performance.

SMCJ33A (MDD): This substitute provides functional equivalence with comparable electrical characteristics and identical package configuration. The part is in active production status with high inventory availability. The operating temperature range is reduced to -50°C to 150°C, which may limit suitability for applications requiring the full -65°C to 185°C range of the original part. This option is suitable for general-purpose applications where the narrower temperature specification is acceptable.

Frequently Asked Questions (FAQ)

Q: Can TPSMC39AHE3_B/I be used as a direct replacement for TPSMC39HE3_A/I?

A: Yes. Both parts share the same manufacturer, automotive qualification (AEC-Q101), identical package type (DO-214AB/SMC), and equivalent operating temperature range (-65°C to 185°C). Electrical parameters are within acceptable substitution tolerances for TVS diode applications.

Q: What is the key difference between TPSMC39AHE3_B/I and SMCJ33A?

A: The primary difference is the operating temperature range. TPSMC39AHE3_B/I supports -65°C to 185°C, while SMCJ33A is rated -50°C to 150°C. Both parts meet the same package, power rating, and RoHS compliance requirements. Selection depends on the thermal requirements of the target application.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitutes use the DO-214AB (SMC) surface mount package, ensuring mechanical and footprint compatibility with the original TPSMC39HE3_A/I design.

Q: Why is the original part marked as obsolete?

A: The TPSMC39HE3_A/I is classified as obsolete by the manufacturer. The listed substitutes are active production parts that provide equivalent electrical and mechanical functionality for new designs and production continuity.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL rating 1 (Unlimited), matching the compliance profile of the original part.