TPSMC39A Equivalent & Substitute Parts

Part Overview

The TPSMC39A is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for surface mount applications in the DO-214AB (SMC) package. This component provides transient voltage protection with a 33.3V reverse standoff voltage and 53.9V maximum clamping voltage. The part is actively produced and carries AEC-Q101 automotive qualification with ROHS3 compliance. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

TPSMC39A

Littelfuse Inc.In Stock: 2462TPSMC39A Datasheet

Current PartRFQ

1.5SMC39A

Taiwan Semiconductor CorporationIn Stock: 421271.5SMC39A Datasheet

DirectRFQ

SMCJ1.5KE39A-TP

Micro Commercial CoIn Stock: 4071SMCJ1.5KE39A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPSMC39A are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 33.3V
• Voltage - Clamping (Max) @ Ipp: 53.9V
• Voltage - Breakdown (Min): 37.1V
• Current - Peak Pulse (10/1000µs): 28.2A minimum
• Power - Peak Pulse: 1500W
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Type: Zener
• Unidirectional Channels: 1

Identified Substitutes:

• 1.5SMC39A (Taiwan Semiconductor Corporation)
• SMCJ1.5KE39A-TP (Micro Commercial Co)

Both substitutes meet the electrical specifications and package requirements for direct replacement in applications requiring 33.3V standoff protection with 53.9V clamping characteristics.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain identical electrical protection characteristics with matching voltage ratings and power dissipation capabilities. Selection between TPSMC39A, 1.5SMC39A, and SMCJ1.5KE39A-TP is determined by availability, supply chain requirements, and compliance certifications.

The TPSMC39A carries AEC-Q101 automotive qualification, suitable for automotive and high-reliability applications. The 1.5SMC39A and SMCJ1.5KE39A-TP are qualified for general purpose and telecom applications respectively. All parts are ROHS3 compliant with MSL 1 rating and REACH unaffected status.

The SMCJ1.5KE39A-TP supports an extended operating temperature range to 175°C compared to 150°C for the TPSMC39A and 1.5SMC39A, providing additional thermal margin in high-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can 1.5SMC39A directly replace TPSMC39A in automotive applications?

A: The 1.5SMC39A meets all electrical and mechanical specifications for direct replacement. However, the TPSMC39A carries AEC-Q101 automotive qualification. Application of 1.5SMC39A in automotive designs requires verification of qualification requirements for the specific end application.

Q: What is the difference between SMCJ1.5KE39A-TP and TPSMC39A?

A: Both parts share identical voltage ratings (33.3V standoff, 53.9V clamping) and power ratings (1500W). The SMCJ1.5KE39A-TP supports extended operating temperature to 175°C versus 150°C for TPSMC39A. All other electrical and mechanical parameters are equivalent.

Q: Are all three parts in the same DO-214AB package?

A: Yes. TPSMC39A, 1.5SMC39A, and SMCJ1.5KE39A-TP are all housed in the DO-214AB (SMC) surface mount package with identical footprints and pinouts.

Q: What compliance certifications apply to these TVS diodes?

A: All three parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity level). The TPSMC39A additionally carries AEC-Q101 automotive qualification. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Q: Can these parts be used interchangeably in telecom applications?

A: Yes. The 1.5SMC39A is specifically qualified for telecom applications, while SMCJ1.5KE39A-TP is designated for general purpose use. All three parts meet the electrical requirements for transient voltage suppression in telecom circuits.