P6SMB91A-M3/5B Equivalent & Substitute Parts

Part Overview

The P6SMB91A-M3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 77.8V reverse standoff voltage range with a 125V maximum clamping voltage and 4.8A peak pulse current rating. The device is designed for general-purpose transient voltage suppression applications and is currently in active production status. Equivalent and substitute parts are identified when component availability is limited or when design requirements permit selection from alternative manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

P6SMB91A-M3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1184P6SMB91A-M3/5B Datasheet

Current PartRFQ

SZP6SMB91AT3G

Littelfuse Inc.In Stock: 3862SZP6SMB91AT3G Datasheet

DirectRFQ

SMBJP6KE91A-TP

Micro Commercial CoIn Stock: 2484SMBJP6KE91A-TP Datasheet

UpgradeRFQ

P6SMB91A

Eaton - Electronics DivisionIn Stock: 30307P6SMB91A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P6SMB91A-M3/5B are qualified based on 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): 4.8A minimum
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA or SMB equivalent
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener

All identified substitutes maintain these core electrical specifications and surface mount packaging compatibility. Variations in peak pulse current (4.9A vs 4.8A) and operating temperature ranges represent acceptable engineering tolerances within the TVS diode category.

Parameter Comparison

Engineering Selection Recommendations

All four parts maintain active production status and meet RoHS compliance requirements. Selection among these TVS diodes should be based on:

SZP6SMB91AT3G (Littelfuse): Carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade component certification. Identical electrical specifications and operating temperature range to the primary part.

SMBJP6KE91A-TP (Micro Commercial Co): Offers extended upper operating temperature limit of 175°C compared to 150°C on the primary part, with marginally higher peak pulse current (4.9A vs 4.8A). Suitable for high-temperature environments.

P6SMB91A (Eaton): Manufacturer-recommended equivalent with highest inventory availability (30,200 pcs). Maintains core electrical specifications with extended upper operating temperature of 150°C. Designated for telecom applications.

All substitutes are electrically and mechanically compatible with the P6SMB91A-M3/5B within the specified parameter tolerances.

Frequently Asked Questions (FAQ)

Q: Can SZP6SMB91AT3G replace P6SMB91A-M3/5B in all applications?

A: Yes, within the specified electrical and mechanical parameters. The SZP6SMB91AT3G maintains identical voltage ratings, clamping characteristics, and operating temperature range. The addition of AEC-Q101 automotive qualification does not restrict use in non-automotive applications.

Q: What is the difference between the packaging designations TB and TR?

A: TB (Tape & Box) and TR (Tape & Reel) refer to supply packaging formats. TB packages components in tape wound on a reel and boxed for shipment. TR packages components directly on tape and reel. Both formats contain identical components; the difference is in handling and storage logistics.

Q: Is the 0.1A difference in peak pulse current (4.8A vs 4.9A) significant?

A: The 0.1A difference represents a 2% variance within normal manufacturing tolerances for TVS diodes in this category. Both ratings satisfy the 600W peak pulse power specification and are electrically equivalent for circuit protection purposes.

Q: Can SMBJP6KE91A-TP be used in applications with lower temperature requirements?

A: Yes. The extended operating temperature range (-55°C to 175°C) of SMBJP6KE91A-TP is a superset of the primary part's range (-65°C to 150°C). The component functions within the narrower temperature window without performance degradation.

Q: Are all substitutes compatible with the same PCB footprint?

A: Yes. All parts use DO-214AA or SMB package designations with identical surface mount footprints. Direct PCB layout substitution is possible without redesign.

Q: What compliance certifications apply to all substitute parts?

A: All parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8541.10.0080. Moisture sensitivity level is 1 (Unlimited) for all variants.