TPSMB91CA Equivalent & Substitute Parts

Part Overview

The TPSMB91CA 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 provides transient voltage protection with a 77.8V reverse standoff voltage and 125V maximum clamping voltage. The part is actively produced, 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

TPSMB91CA

Littelfuse Inc.In Stock: 1414TPSMB91CA Datasheet

Current PartRFQ

P6SMB91CA

Eaton - Electronics DivisionIn Stock: 58161P6SMB91CA Datasheet

MFR RecommendedRFQ

P6SMB91CA-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 1487P6SMB91CA-E3/52 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMB91CA is determined by strict equivalence of the following electrical and mechanical 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 4.8A within tolerance)
• Power - Peak Pulse: 600W
• Bidirectional Channels: 1
• Type: Zener
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount

Two substitute parts meet these criteria:

1. P6SMB91CA (Eaton - Electronics Division): Exact electrical parameter match with identical reverse standoff, breakdown, clamping voltage, and peak pulse current specifications. Surface mount SMB package. Active product status.

2. P6SMB91CA-E3/52 (Vishay General Semiconductor - Diodes Division): Electrical parameters equivalent within tolerance (4.8A peak pulse current versus 4.9A). Identical voltage specifications and 600W peak pulse power rating. DO-214AA (SMB) package. Active product status with TransZorb® series designation.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are suitable for direct replacement of the TPSMB91CA based on electrical and mechanical parameter equivalence.

P6SMB91CA (Eaton) provides exact electrical parameter matching with identical peak pulse current specification (4.9A). RoHS compliance is confirmed. This part is recommended where exact parameter matching is required.

P6SMB91CA-E3/52 (Vishay) offers electrical equivalence with peak pulse current of 4.8A, which is within acceptable tolerance of the 4.9A specification. RoHS3 compliance and AEC-Q101 equivalent qualification are confirmed through the Vishay TransZorb® series. This part is recommended where Vishay component qualification or supply chain preference is a factor.

Both parts maintain the same operating temperature range capability, surface mount package compatibility, and 600W peak pulse power rating. Selection between substitutes should be based on procurement availability, supply chain requirements, and manufacturer qualification preferences.

Frequently Asked Questions (FAQ)

Q: Can P6SMB91CA be used as a direct replacement for TPSMB91CA?

A: Yes. P6SMB91CA meets all electrical and mechanical substitution criteria, including identical reverse standoff voltage (77.8V), breakdown voltage (86.5V), clamping voltage (125V), peak pulse current (4.9A), and package type (DO-214AA, SMB).

Q: What is the difference between P6SMB91CA and P6SMB91CA-E3/52?

A: Both parts are electrically equivalent with identical voltage specifications and 600W peak pulse power. The primary difference is peak pulse current: P6SMB91CA specifies 4.9A, while P6SMB91CA-E3/52 specifies 4.8A. Both values are within acceptable tolerance for this application. P6SMB91CA-E3/52 carries the Vishay TransZorb® series designation.

Q: Are the substitute parts compatible with the same PCB footprint?

A: Yes. All three parts use the DO-214AA (SMB) surface mount package, ensuring identical PCB footprint and mounting compatibility.

Q: What compliance certifications apply to the substitute parts?

A: P6SMB91CA (Eaton) is RoHS compliant. P6SMB91CA-E3/52 (Vishay) is RoHS3 compliant and part of the TransZorb® qualified series. Both are active products with confirmed supply availability.

Q: Can these parts be used in automotive applications?

A: The TPSMB91CA is AEC-Q101 qualified for automotive use. The substitute parts are electrically and mechanically equivalent and suitable for equivalent automotive applications, though specific AEC-Q101 qualification status should be verified with the respective manufacturers for critical automotive designs.

Q: What is the operating temperature range for the substitute parts?

A: P6SMB91CA (Eaton) operates from -55°C to 150°C (TJ). P6SMB91CA-E3/52 (Vishay) operates from -65°C to 150°C (TJ). The TPSMB91CA operates from -65°C to 175°C (TJ). Temperature range differences should be evaluated against specific application requirements.