TPSMC27A Equivalent & Substitute Parts

Part Overview

The TPSMC27A 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 overvoltage protection with a 23.1V reverse standoff voltage and 37.5V maximum clamping voltage. The part is actively produced, AEC-Q101 qualified for automotive applications, and ROHS3 compliant. Substitute parts are identified to provide equivalent electrical performance and mechanical compatibility for procurement flexibility and supply chain continuity.

Substiute Parts

TPSMC27A

Littelfuse Inc.In Stock: 3234TPSMC27A Datasheet

Current PartRFQ

1.5SMC27A

Taiwan Semiconductor CorporationIn Stock: 203661.5SMC27A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPSMC27A is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 23.1V
• Voltage - Clamping (Max) @ Ipp: 37.5V
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional

The 1.5SMC27A meets all substitution criteria. Both parts share identical reverse standoff voltage (23.1V), breakdown voltage (25.7V minimum), clamping voltage (37.5V maximum), and package configuration (DO-214AB, SMC surface mount). Peak pulse current differs marginally (42A versus 40.5A), with both parts rated for 1500W peak pulse power. Operating temperature range and compliance certifications are equivalent.

Parameter Comparison

Engineering Selection Recommendations

The 1.5SMC27A qualifies as a direct substitute for the TPSMC27A based on electrical parameter equivalence and mechanical compatibility. Both parts maintain identical voltage specifications (23.1V reverse standoff, 37.5V clamping), identical power rating (1500W peak pulse), and identical package configuration (DO-214AB, SMC surface mount). The 1.5SMC27A demonstrates a marginal increase in peak pulse current capability (42A versus 40.5A), which provides additional design margin without introducing incompatibility.

Both parts are active products with ROHS3 compliance and REACH unaffected status. The TPSMC27A carries AEC-Q101 automotive qualification; the 1.5SMC27A does not list this qualification in the provided data. Selection between these parts should consider application-specific automotive qualification requirements.

Frequently Asked Questions (FAQ)

Q: Can the 1.5SMC27A replace the TPSMC27A in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (23.1V), breakdown voltage (25.7V), clamping voltage (37.5V), and package configuration (DO-214AB, SMC). The 1.5SMC27A provides equivalent electrical performance with slightly higher peak pulse current capability (42A versus 40.5A).

Q: Are there differences in automotive qualification between these parts?

A: The TPSMC27A is AEC-Q101 qualified. The 1.5SMC27A qualification status is not specified in the provided data. Applications requiring automotive qualification should verify the 1.5SMC27A against specific qualification requirements.

Q: Do both parts use the same package and mounting method?

A: Yes. Both the TPSMC27A and 1.5SMC27A use the DO-214AB (SMC) package and are configured for surface mount assembly. PCB footprints and reflow profiles are compatible.

Q: What is the significance of the peak pulse current difference (40.5A versus 42A)?

A: The 1.5SMC27A provides 3.7% higher peak pulse current capability. Both parts maintain the same 1500W peak pulse power rating and identical voltage specifications. This difference does not affect substitution compatibility.

Q: Are compliance certifications equivalent?

A: Both parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is identical (MSL 1, Unlimited). ECCN and HTSUS classifications match. Verify AEC-Q101 automotive qualification requirements for your specific application.