TPSMB43A Equivalent & Substitute Parts

Part Overview

The TPSMB43A is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AA (SMB) surface mount package. This component is designed for transient voltage protection applications with a reverse standoff voltage of 36.8V and clamping voltage of 59.3V at peak pulse current. The part maintains Active product status and carries AEC-Q101 automotive qualification with ROHS3 compliance. Substitute parts are identified when electrical characteristics and mechanical compatibility align with the original specification.

Substiute Parts

TPSMB43A

Littelfuse Inc.In Stock: 3334TPSMB43A Datasheet

Current PartRFQ

P6SMB43A

Eaton - Electronics DivisionIn Stock: 148264P6SMB43A Datasheet

MFR RecommendedRFQ

P6SMB43A

Eaton - Electronics DivisionIn Stock: 148264P6SMB43A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMB43A is determined by strict equivalence of the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 36.8V
• Voltage - Breakdown (Min): 40.9V
• Voltage - Clamping (Max) @ Ipp: 59.3V
• Current - Peak Pulse (10/1000µs): 10.3A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB (surface mount)
• Unidirectional Channels: 1

The P6SMB43A from Eaton - Electronics Division meets all electrical specifications and package requirements for direct substitution. Both parts are Zener-type unidirectional TVS diodes with identical voltage and current ratings, enabling functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The P6SMB43A qualifies as a direct substitute for the TPSMB43A based on identical electrical performance specifications and compatible surface mount packaging. Both parts maintain Active product status and carry compliance certifications appropriate for their respective applications. The TPSMB43A includes AEC-Q101 automotive qualification, while the P6SMB43A carries RoHS compliance suitable for general industrial and telecom applications. Selection between these parts should be based on application-specific qualification requirements and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the P6SMB43A replace the TPSMB43A in automotive applications?

A: The P6SMB43A meets all electrical and mechanical specifications for functional equivalence. However, the TPSMB43A carries AEC-Q101 automotive qualification. Application of the P6SMB43A in automotive circuits requires verification against specific automotive qualification requirements.

Q: Are the package dimensions identical between TPSMB43A and P6SMB43A?

A: Both parts use the DO-214AA (SMB) surface mount package with identical mechanical footprints, enabling direct PCB layout compatibility.

Q: What is the difference in operating temperature range?

A: The TPSMB43A operates from -65°C to 175°C (TJ), while the P6SMB43A operates from -55°C to 150°C (TJ). Application environments requiring the extended lower temperature range of -65°C require the TPSMB43A.

Q: Are both parts RoHS compliant?

A: The TPSMB43A is ROHS3 compliant. The P6SMB43A is RoHS compliant. Both meet lead-free and hazardous substance restrictions for their respective regulatory frameworks.

Q: What are the key electrical parameters that define substitution?

A: Substitution is determined by matching reverse standoff voltage (36.8V), breakdown voltage (40.9V), clamping voltage (59.3V), peak pulse current (10.3A), and peak pulse power (600W). All these parameters are identical between the TPSMB43A and P6SMB43A.