TPSMC75A Equivalent & Substitute Parts

Part Overview

The TPSMC75A is an automotive-grade Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse, designed for surface mount applications in DO-214AB packaging. This unidirectional Zener diode provides transient voltage protection with a 64.1V reverse standoff voltage and 103V maximum clamping voltage. The part is currently in active production status with AEC-Q101 automotive qualification and ROHS3 compliance. Equivalent and substitute parts are identified to support supply chain continuity, design flexibility, and inventory optimization while maintaining electrical and mechanical compatibility.

Substiute Parts

TPSMC75A

LittelfuseIn Stock: 2414TPSMC75A Datasheet

Current PartRFQ

1.5SMC75A

Taiwan Semiconductor CorporationIn Stock: 76501.5SMC75A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPSMC75A is determined by strict electrical and mechanical parameter matching within the TVS diode category. The following parameters establish substitution compatibility:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 64.1V
• Voltage - Breakdown (Min): 71.3V
• Voltage - Clamping (Max) @ Ipp: 103V
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Type: Zener, Unidirectional

Allowable Variation Parameter:

• Current - Peak Pulse (10/1000µs): ±0.2A tolerance (14.8A nominal)

The 1.5SMC75A from Taiwan Semiconductor Corporation meets all critical electrical parameters and package specifications. The peak pulse current specification of 15A represents a 0.2A increase from the TPSMC75A baseline of 14.8A, which falls within acceptable tolerance for this component category and does not compromise circuit protection performance.

Parameter Comparison

Engineering Selection Recommendations

TPSMC75A (Littelfuse) is the primary specification part with active product status, AEC-Q101 automotive qualification, and established supply chain presence. This part is suitable for applications requiring automotive-grade certification and long-term supply assurance.

1.5SMC75A (Taiwan Semiconductor Corporation) is a qualified substitute with active product status and ROHS3 compliance. This part maintains electrical equivalence across all critical parameters and is suitable for applications where supply diversification or alternative sourcing is required. The part is not AEC-Q101 qualified; therefore, its use in automotive applications requiring explicit AEC-Q101 certification must be evaluated against specific design and regulatory requirements.

Both parts are surface mount components in DO-214AB packaging with identical thermal operating ranges and moisture sensitivity classifications, ensuring direct PCB-level compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 1.5SMC75A directly replace the TPSMC75A in production?

A: Electrical and mechanical compatibility is confirmed. The 1.5SMC75A matches all critical voltage parameters, clamping characteristics, and package specifications. However, the 1.5SMC75A lacks AEC-Q101 automotive qualification. Substitution in automotive applications must comply with design qualification and regulatory requirements specific to the end application.

Q: What is the significance of the 0.2A difference in peak pulse current?

A: The 1.5SMC75A specifies 15A peak pulse current compared to the TPSMC75A baseline of 14.8A. This 0.2A increase represents enhanced transient handling capability and does not compromise circuit protection. Both parts deliver identical 1500W peak pulse power dissipation.

Q: Are the packages physically identical?

A: Both parts use DO-214AB (SMC) surface mount packaging. PCB footprints, solder pad dimensions, and component placement are identical, enabling direct substitution without layout modifications.

Q: What compliance differences exist between these parts?

A: The TPSMC75A carries AEC-Q101 automotive qualification and REACH Affected status. The 1.5SMC75A is ROHS3 compliant and REACH Unaffected. Both parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity classification.

Q: Can these parts be used interchangeably in the same circuit?

A: Yes, from an electrical standpoint. Both parts provide identical voltage protection characteristics and thermal performance across the -55°C to 150°C operating range. Selection between them should be based on supply availability, cost considerations, and specific qualification requirements of the application.