TPSMC20A Equivalent & Substitute Parts

Part Overview

The TPSMC20A 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 17.1V reverse standoff voltage and 27.7V maximum clamping voltage at peak pulse current. The part is active in production, AEC-Q101 qualified for automotive applications, and ROHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

TPSMC20A

Littelfuse Inc.In Stock: 4072TPSMC20A Datasheet

Current PartRFQ

1.5SMC20A

Taiwan Semiconductor CorporationIn Stock: 8881.5SMC20A Datasheet

DirectRFQ

SMCJ1.5KE20A-TP

Micro Commercial CoIn Stock: 7602SMCJ1.5KE20A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPSMC20A are qualified based on the following electrical and mechanical parameters:

Critical Parameters for Substitution:

• Voltage - Reverse Standoff (Typ): 17.1V
• Voltage - Clamping (Max) @ Ipp: 27.7V
• Voltage - Breakdown (Min): 19V
• Current - Peak Pulse (10/1000µs): 54.9A or higher
• Power - Peak Pulse: 1500W
• Package / Case: DO-214AB (SMC)
• Type: Zener, Unidirectional (1 channel)

The identified substitute parts meet these core electrical specifications and are compatible with the same PCB footprint and mounting process. Variations in peak pulse current (within the 54.9A specification or above) and operating temperature range do not affect functional substitution for this application category.

Parameter Comparison

Engineering Selection Recommendations

All three parts are active in production status and ROHS3 compliant, meeting current regulatory requirements. The TPSMC20A (Littelfuse Inc.) carries AEC-Q101 automotive qualification, which is the highest qualification level among the three options. The 1.5SMC20A (Taiwan Semiconductor Corporation) and SMCJ1.5KE20A-TP (Micro Commercial Co) are suitable for general-purpose and telecom applications respectively, with equivalent electrical performance.

Selection should be based on application requirements: automotive-grade applications require the TPSMC20A or equivalent parts with matching AEC-Q101 qualification. For non-automotive applications, all three parts are functionally equivalent. The SMCJ1.5KE20A-TP offers an extended operating temperature range to 175°C, which may be advantageous in high-temperature environments within the -55 to 175°C specification.

Frequently Asked Questions (FAQ)

Q: Can the 1.5SMC20A replace the TPSMC20A in automotive applications? A: The 1.5SMC20A meets all electrical and mechanical specifications for direct substitution. However, it does not carry AEC-Q101 automotive qualification. Use in automotive applications should be evaluated against specific design and qualification requirements.

Q: What is the difference between the three parts? A: All three parts share identical voltage ratings (17.1V standoff, 27.7V clamping) and power dissipation (1500W). The primary differences are manufacturer, peak pulse current (54.9A vs 56A), operating temperature range, and qualification status. The TPSMC20A is AEC-Q101 qualified; the SMCJ1.5KE20A-TP has an extended temperature range to 175°C.

Q: Are all three parts in the same package? A: Yes, all three parts use the DO-214AB (SMC) surface mount package, ensuring identical PCB footprint and mounting compatibility.

Q: Does the 56A peak pulse current of the 1.5SMC20A affect compatibility? A: No. The 56A specification exceeds the 54.9A requirement and provides equivalent or improved performance for transient suppression. This does not affect functional substitution.

Q: What compliance certifications apply to these parts? A: All three parts are ROHS3 compliant and REACH unaffected. The TPSMC20A additionally carries AEC-Q101 automotive qualification. Moisture sensitivity level is 1 (Unlimited) for all parts.