TPSMB20CA Equivalent & Substitute Parts

Part Overview

The TPSMB20CA is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for surface mount applications in the DO-214AA (SMB) package. This component is classified as Active product status and carries AEC-Q101 automotive qualification. The TPSMB20CA is specified for transient voltage suppression with a 17.1V reverse standoff voltage and 27.7V maximum clamping voltage at peak pulse current. Equivalent and substitute parts are identified based on matching electrical characteristics and mechanical compatibility within the TVS diode category.

Substiute Parts

TPSMB20CA

Littelfuse Inc.In Stock: 1137TPSMB20CA Datasheet

Current PartRFQ

P6SMB20CA

Eaton - Electronics DivisionIn Stock: 35475P6SMB20CA Datasheet

MFR RecommendedRFQ

SMBJP6KE20CA-TP

Micro Commercial CoIn Stock: 1454SMBJP6KE20CA-TP Datasheet

DirectRFQ

P6SMB20CA

Eaton - Electronics DivisionIn Stock: 35475P6SMB20CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPSMB20CA are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 17.1V
• Voltage - Breakdown (Min): 19V
• Voltage - Clamping (Max) @ Ipp: 27.7V
• Current - Peak Pulse (10/1000µs): 21.7A to 22A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Type: Zener, Bidirectional

Identified Substitutes:

1. P6SMB20CA (Eaton - Electronics Division) — MFR Recommended substitute with matching voltage specifications and power rating. Peak pulse current rated at 21.7A. Operating temperature range -55°C ~ 150°C.

2. SMBJP6KE20CA-TP (Micro Commercial Co) — Direct manufacturer substitute with identical electrical specifications. Peak pulse current rated at 22A. Operating temperature range -55°C ~ 175°C.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain Active product status and ROHS3 compliance. The TPSMB20CA and SMBJP6KE20CA-TP are functionally equivalent with identical peak pulse current ratings (22A) and matching operating temperature ranges (-55°C to 175°C minimum). The P6SMB20CA operates within a narrower temperature range (-55°C to 150°C) and carries a marginally lower peak pulse current specification (21.7A versus 22A), though both remain within the 600W power dissipation envelope. All three parts are qualified for surface mount assembly in DO-214AA (SMB) packages and meet moisture sensitivity and regulatory requirements. Selection between these parts depends on application-specific temperature operating conditions and current margin requirements.

Frequently Asked Questions (FAQ)

Q: Can P6SMB20CA replace TPSMB20CA in all applications?

A: P6SMB20CA matches the critical voltage specifications (17.1V standoff, 27.7V clamping) and power rating (600W). The peak pulse current is rated at 21.7A compared to 22A for the TPSMB20CA. The operating temperature range is -55°C to 150°C, which is narrower than the TPSMB20CA range of -65°C to 175°C. Substitution is valid for applications operating within -55°C to 150°C and where the 21.7A current specification meets design requirements.

Q: What is the difference between SMBJP6KE20CA-TP and TPSMB20CA?

A: Both parts are electrically identical with matching voltage specifications, peak pulse current (22A), and power rating (600W). Both operate across -55°C to 175°C. The primary difference is manufacturer: SMBJP6KE20CA-TP is manufactured by Micro Commercial Co, while TPSMB20CA is manufactured by Littelfuse Inc. Both are packaged in DO-214AA (SMB) for surface mount applications.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts use the DO-214AA (SMB) package and are specified for surface mount mounting. PCB footprints are mechanically identical.

Q: Which substitute offers the widest operating temperature range?

A: Both TPSMB20CA and SMBJP6KE20CA-TP operate across -55°C to 175°C. The P6SMB20CA operates across -55°C to 150°C, which is narrower.

Q: Do all substitutes meet the same compliance standards?

A: All three parts are ROHS3 compliant with MSL rating of 1 (Unlimited). The TPSMB20CA carries AEC-Q101 automotive qualification. Compliance certifications for P6SMB20CA and SMBJP6KE20CA-TP are based on the provided specifications.