TPSMB91A Equivalent & Substitute Parts

Part Overview

The TPSMB91A is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for surface mount applications in the DO-214AA (SMB) package. This component provides transient voltage protection with a 77.8V reverse standoff voltage and 125V maximum clamping voltage. The part is actively produced and carries AEC-Q101 automotive qualification with ROHS3 compliance. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

TPSMB91A

Littelfuse Inc.In Stock: 994TPSMB91A Datasheet

Current PartRFQ

P6SMB91A

Eaton - Electronics DivisionIn Stock: 30307P6SMB91A Datasheet

DirectRFQ

SMBJP6KE91A-TP

Micro Commercial CoIn Stock: 2484SMBJP6KE91A-TP Datasheet

DirectRFQ

P6SMB91A_R1_00001

Panjit International Inc.In Stock: 1824P6SMB91A_R1_00001 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPSMB91A are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 77.8V
• Voltage - Breakdown (Min): 86.5V
• Voltage - Clamping (Max) @ Ipp: 125V
• Current - Peak Pulse (10/1000µs): 4.9A (or equivalent within tolerance)
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional

All identified substitute parts maintain these core electrical specifications and physical package compatibility, ensuring functional equivalence in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain active product status and comply with RoHS requirements. The TPSMB91A (Littelfuse) and SMBJP6KE91A-TP (Micro Commercial Co) both carry ROHS3 compliance. The TPSMB91A holds AEC-Q101 automotive qualification, which is the highest qualification level among the listed parts.

Operating temperature ranges vary: the TPSMB91A supports -65°C to 175°C, while P6SMB91A (Eaton) and P6SMB91A_R1_00001 (Panjit) are rated to -55°C to 150°C. SMBJP6KE91A-TP (Micro Commercial Co) supports -55°C to 175°C. Selection should account for application temperature requirements.

Peak pulse current specification shows P6SMB91A_R1_00001 (Panjit) at 4.8A versus 4.9A for other parts. This minor variance remains within functional equivalence for the specified 600W power rating and voltage protection parameters.

Frequently Asked Questions (FAQ)

Q: Can P6SMB91A (Eaton) be used as a direct replacement for TPSMB91A (Littelfuse)?

A: Yes. Both parts share identical voltage specifications (77.8V standoff, 86.5V breakdown, 125V clamping), current rating (4.9A), power rating (600W), and package (DO-214AA, SMB). Operating temperature range differs: Eaton is rated -55°C to 150°C versus Littelfuse -65°C to 175°C. Selection depends on application temperature requirements.

Q: What is the difference between SMBJP6KE91A-TP and TPSMB91A?

A: Electrical specifications are identical. Both support -55°C to 175°C operating temperature. TPSMB91A carries AEC-Q101 automotive qualification; SMBJP6KE91A-TP does not. Both are ROHS3 compliant. Package and mounting type are equivalent (DO-214AA, SMB, surface mount).

Q: Is P6SMB91A_R1_00001 (Panjit) suitable for high-reliability applications?

A: P6SMB91A_R1_00001 maintains all critical voltage and power specifications. Operating temperature is limited to -55°C to 150°C. The part does not carry AEC-Q101 qualification. Selection for high-reliability applications should consider specific qualification requirements.

Q: Are all substitute parts available in the same packaging format?

A: All parts use DO-214AA (SMB) surface mount package. Packaging options differ: TPSMB91A, P6SMB91A, and SMBJP6KE91A-TP are supplied in Tape & Reel (TR). P6SMB91A_R1_00001 is available in Cut Tape (CT) and Digi-Reel format. Verify packaging compatibility with assembly equipment.

Q: What determines functional equivalence for TVS diode substitution?

A: Functional equivalence is determined by matching reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, power rating, and package type. All listed substitutes meet these criteria for the TPSMB91A application.