P6SMB91A-E3/52 Equivalent & Substitute Parts

Part Overview

The P6SMB91A-E3/52 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 housed in a DO-214AA (SMB) package and is actively produced with RoHS3 compliance. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring TVS protection in the 77.8V to 86.5V breakdown voltage range.

Substiute Parts

P6SMB91A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 1105P6SMB91A-E3/52 Datasheet

Current PartRFQ

SM6T100A

STMicroelectronicsIn Stock: 22616SM6T100A Datasheet

DirectRFQ

SZP6SMB91AT3G

Littelfuse Inc.In Stock: 3862SZP6SMB91AT3G Datasheet

DirectRFQ

P6SMB91A

Eaton - Electronics DivisionIn Stock: 30307P6SMB91A Datasheet

MFR RecommendedRFQ

SMBJP6KE91A-TP

Micro Commercial CoIn Stock: 2484SMBJP6KE91A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P6SMB91A-E3/52 are classified based on electrical parameter compatibility within the TVS diode category. The primary substitution criteria are:

• Voltage - Reverse Standoff (Typ): 77.8V ± tolerance
• Voltage - Breakdown (Min): 86.5V minimum
• Voltage - Clamping (Max) @ Ipp: 125V maximum
• Current - Peak Pulse (10/1000µs): 4.8A minimum
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA or SMB equivalent
• Mounting Type: Surface Mount

Parts meeting these electrical and mechanical parameters are considered direct substitutes. Parts with different electrical characteristics (such as higher clamping voltages or different peak pulse current ratings) are classified as alternative solutions for different application requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Electrical and Mechanical Equivalence):

SZP6SMB91AT3G (Littelfuse), P6SMB91A (Eaton), and SMBJP6KE91A-TP (Micro Commercial Co) are direct electrical and mechanical substitutes for the P6SMB91A-E3/52. All three parts share identical reverse standoff voltage (77.8V), breakdown voltage (86.5V), clamping voltage (125V), and power rating (600W). Peak pulse current ratings are 4.8A to 4.9A, within acceptable tolerance. All parts are housed in DO-214AA or equivalent SMB packages and are RoHS3 compliant.

The SZP6SMB91AT3G carries AEC-Q101 automotive qualification, making it suitable for automotive applications requiring enhanced reliability standards. The P6SMB91A (Eaton) supports telecom applications and maintains the widest operating temperature range (-65 to 150°C). The SMBJP6KE91A-TP (MCC) extends the upper operating temperature to 175°C.

Alternative Solution (Different Electrical Characteristics):

SM6T100A (STMicroelectronics) operates at a higher reverse standoff voltage (85.5V) with a higher breakdown voltage (95V) and significantly higher clamping voltage (178V). Peak pulse current is 22.5A with an 8/20µs pulse profile, differing from the 10/1000µs standard. This part is suitable for applications requiring higher transient energy absorption but is not a direct substitute due to different voltage and current characteristics.

Frequently Asked Questions (FAQ)

Q: Can SM6T100A be used as a direct replacement for P6SMB91A-E3/52?

A: No. While both are TVS diodes in DO-214AA packages, SM6T100A has different electrical characteristics: higher reverse standoff voltage (85.5V vs. 77.8V), higher clamping voltage (178V vs. 125V), and significantly higher peak pulse current (22.5A vs. 4.8A). SM6T100A is an alternative solution for applications requiring higher transient suppression capability, not a direct substitute.

Q: Are SZP6SMB91AT3G, P6SMB91A, and SMBJP6KE91A-TP interchangeable with P6SMB91A-E3/52?

A: Yes, these three parts are direct electrical and mechanical substitutes. All share the same reverse standoff voltage (77.8V), breakdown voltage (86.5V), clamping voltage (125V), and power rating (600W). Peak pulse current ratings are 4.8A to 4.9A. All are housed in DO-214AA or SMB packages and are RoHS3 compliant. Selection among these substitutes depends on application-specific requirements such as automotive qualification (SZP6SMB91AT3G), operating temperature range, or packaging format.

Q: What is the difference between DO-214AA and SMBJ packaging?

A: Both DO-214AA and SMBJ are surface mount package designations for TVS diodes. DO-214AA is the standard IEC designation, while SMBJ is a variant designation used by some manufacturers. Both packages are mechanically and electrically compatible for the same footprint and are considered equivalent for PCB assembly purposes.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range does not prevent substitution if the application operates within the overlapping temperature range of both parts. P6SMB91A-E3/52 operates from -65 to 150°C. SZP6SMB91AT3G and P6SMB91A also support -65 to 150°C or -55 to 150°C ranges. SMBJP6KE91A-TP extends to 175°C. Select the substitute based on your application's actual operating temperature requirements.

Q: What does RoHS3 compliance mean for substitution?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements. All listed substitutes are RoHS3 compliant, ensuring environmental and regulatory compatibility. This compliance status does not affect electrical substitution but is important for applications subject to RoHS regulations.

Q: Is AEC-Q101 qualification required for all applications?

A: AEC-Q101 qualification is required only for automotive applications. SZP6SMB91AT3G carries this qualification, making it the appropriate choice for automotive use. For non-automotive applications, AEC-Q101 qualification is not necessary, and other direct substitutes may be selected based on availability and cost.