TPSMC82A Equivalent & Substitute Parts

Part Overview

The TPSMC82A is an active Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for surface mount applications in DO-214AB (SMCJ) packaging. This unidirectional Zener-type device provides transient voltage protection with a 70.1V reverse standoff voltage and 113V maximum clamping voltage at peak pulse current. The part is AEC-Q101 qualified for automotive applications and maintains ROHS3 compliance. Substitute parts are identified when electrical parameters, mechanical compatibility, and regulatory certifications align within acceptable tolerances for the intended protection circuit.

Substiute Parts

TPSMC82A

Littelfuse Inc.In Stock: 2389TPSMC82A Datasheet

Current PartRFQ

1.5SMC82A

Taiwan Semiconductor CorporationIn Stock: 123561.5SMC82A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMC82A is permissible with the 1.5SMC82A based on the following alignment of critical electrical and mechanical parameters:

Voltage Parameters: Both parts maintain identical reverse standoff voltage (70.1V), breakdown voltage minimum (77.9V), and maximum clamping voltage (113V). These parameters define the protection threshold and response characteristics of the TVS diode.

Current Handling: The 1.5SMC82A provides 13.9A peak pulse current compared to the TPSMC82A's 14.6A. This represents a 2.9% increase within acceptable tolerance for the same power dissipation class (1500W peak pulse).

Package and Mounting: Both devices use DO-214AB surface mount packaging with identical mechanical footprint and soldering requirements.

Electrical Type and Configuration: Both are unidirectional Zener-type TVS diodes with single channel configuration.

Regulatory Compliance: Both parts are ROHS3 compliant, REACH unaffected, and classified under identical ECCN and HTSUS codes.

Operating Temperature: Identical operating temperature range of -55°C to 150°C (TJ).

Parameter Comparison

Engineering Selection Recommendations

TPSMC82A (Littelfuse Inc.): Primary selection for applications requiring AEC-Q101 automotive qualification. Active product status with 2350 units in stock. Suitable for automotive transient voltage protection circuits where manufacturer qualification is a specification requirement.

1.5SMC82A (Taiwan Semiconductor Corporation): Direct substitute with active product status and higher inventory availability (12300 units in stock). Electrical parameters align within acceptable tolerance. ROHS3 and REACH compliance maintained. Suitable for applications where automotive qualification is not mandatory and cost optimization or supply chain diversification is a consideration. Peak pulse current specification (13.9A) provides marginal performance advantage over the primary part.

Both parts satisfy identical electrical protection requirements, mechanical compatibility, and regulatory compliance frameworks. Selection between them depends on qualification requirements and supply chain strategy rather than technical performance differentiation.

Frequently Asked Questions (FAQ)

Q: Can the 1.5SMC82A directly replace the TPSMC82A in automotive applications?

A: The 1.5SMC82A provides electrical and mechanical compatibility. However, the TPSMC82A carries AEC-Q101 automotive qualification while the 1.5SMC82A does not. Substitution in automotive applications requires confirmation that AEC-Q101 qualification is not a design or procurement specification.

Q: What is the significance of the 0.4A difference in peak pulse current?

A: The 1.5SMC82A specifies 13.9A versus the TPSMC82A's 14.6A peak pulse current. Both maintain identical 1500W peak pulse power dissipation. The current difference represents approximately 2.9% variance and does not alter the protection characteristics or clamping voltage response.

Q: Are the DO-214AB packages identical between manufacturers?

A: Yes. Both the TPSMC82A (SMCJ variant) and 1.5SMC82A (SMC variant) use DO-214AB surface mount packaging with identical mechanical footprint, lead spacing, and PCB soldering requirements.

Q: Do both parts meet the same environmental and compliance standards?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified under identical ECCN (EAR99) and HTSUS (8541.10.0080) codes. Operating temperature range is identical at -55°C to 150°C (TJ). Moisture sensitivity level is 1 (Unlimited) for both.

Q: Which part should be selected for new designs?

A: Selection depends on design requirements. If AEC-Q101 automotive qualification is specified, use TPSMC82A. If automotive qualification is not required and supply chain flexibility is beneficial, 1.5SMC82A is electrically and mechanically equivalent.