P6SMB6.8A-M3/5B Equivalent & Substitute Parts

Part Overview

The P6SMB6.8A-M3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 5.8V reverse standoff voltage class and provides transient protection for general-purpose applications. The part is Active status and RoHS3 compliant. Equivalent and substitute parts are identified when electrical parameters and mechanical compatibility align within specified tolerances, enabling procurement flexibility and supply chain continuity.

Substiute Parts

P6SMB6.8A-M3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1099P6SMB6.8A-M3/5B Datasheet

Current PartRFQ

P6SMB6.8A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 3313P6SMB6.8A-E3/52 Datasheet

DirectRFQ

1KSMB6.8A

Littelfuse Inc.In Stock: 14581KSMB6.8A Datasheet

MFR RecommendedRFQ

P6SMB6.8A

Taiwan Semiconductor CorporationIn Stock: 39620P6SMB6.8A Datasheet

MFR RecommendedRFQ

P6SMB6.8A

Taiwan Semiconductor CorporationIn Stock: 39620P6SMB6.8A Datasheet

MFR RecommendedRFQ

SM6T6V8A

STMicroelectronicsIn Stock: 20198SM6T6V8A Datasheet

MFR RecommendedRFQ

SM6T6V8AY

STMicroelectronicsIn Stock: 19012SM6T6V8AY Datasheet

MFR RecommendedRFQ

SMBJP6KE6.8A-TP

Micro Commercial CoIn Stock: 210418SMBJP6KE6.8A-TP Datasheet

MFR RecommendedRFQ

SZP6SMB6.8AT3G

Littelfuse Inc.In Stock: 2448SZP6SMB6.8AT3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment of the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 5.8V
• Voltage - Breakdown (Min): 6.45V or 6.46V
• Voltage - Clamping (Max) @ Ipp: 10.5V
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories based on peak pulse current and power dissipation characteristics:

Group A (Direct Equivalents): Parts with Current - Peak Pulse between 57A and 60A and Power - Peak Pulse of 600W. These maintain electrical performance within the original specification envelope.

Group B (Enhanced Performance): Parts with Current - Peak Pulse exceeding 60A or Power - Peak Pulse of 1000W. These provide superior transient handling capability while maintaining voltage parameters and package compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Group A): P6SMB6.8A-E3/52, P6SMB6.8A (Taiwan Semiconductor Corporation), SMBJP6KE6.8A-TP, and SZP6SMB6.8AT3G are direct functional equivalents. All maintain identical voltage parameters (5.8V standoff, 10.5V clamping) and 600W power dissipation. These parts are suitable for one-to-one replacement in existing designs. P6SMB6.8A-E3/52 is the same manufacturer variant with Tape & Reel packaging. SZP6SMB6.8AT3G carries AEC-Q101 automotive qualification and extended temperature range (-65°C ~ 150°C), making it suitable for automotive applications.

Enhanced Performance (Group B): 1KSMB6.8A (Littelfuse) provides 95.2A peak pulse current and 1000W power dissipation, offering superior transient suppression capability. This part is suitable for applications requiring higher energy absorption. Operating temperature range is -55°C ~ 150°C.

Non-Equivalent Alternatives: SM6T6V8A and SM6T6V8AY (STMicroelectronics) exhibit higher clamping voltage (13.4V) and significantly higher peak pulse current (298A at 8/20µs pulse). These parts do not meet the 10.5V clamping specification and are not direct substitutes. SM6T6V8AY includes AEC-Q101 automotive qualification.

All listed parts are Active status, RoHS3 compliant, and MSL 1 rated.

Frequently Asked Questions (FAQ)

Q: Can P6SMB6.8A-E3/52 replace P6SMB6.8A-M3/5B?

A: Yes. Both parts are manufactured by Vishay, share identical electrical specifications (5.8V standoff, 10.5V clamping, 57.1A peak pulse, 600W power), and use DO-214AA SMB packaging. The difference is packaging format: M3/5B uses Tape & Box while E3/52 uses Tape & Reel. Electrical performance is equivalent.

Q: What is the difference between 1KSMB6.8A and the original part?

A: 1KSMB6.8A maintains identical voltage parameters but provides higher peak pulse current (95.2A versus 57.1A) and power dissipation (1000W versus 600W). This enables handling of larger transient events. Operating temperature minimum is -55°C instead of -65°C. Use this part when enhanced transient protection is required.

Q: Why are SM6T6V8A and SM6T6V8AY listed as substitutes if they have different clamping voltage?

A: These parts are listed in the original substitute reference but do not meet the electrical specification for direct substitution. The clamping voltage of 13.4V exceeds the 10.5V maximum requirement. These parts should not be used as replacements without circuit redesign verification.

Q: Is SZP6SMB6.8AT3G suitable for automotive applications?

A: Yes. SZP6SMB6.8AT3G carries AEC-Q101 automotive qualification and maintains the full operating temperature range (-65°C ~ 150°C). It is electrically equivalent to the original part and suitable for automotive-grade designs.

Q: What is the significance of the packaging designation (SMBJ versus SMB)?

A: Both SMBJ and SMB refer to the DO-214AA package form factor used for surface mount TVS diodes. The designations are manufacturer-specific nomenclature for the same physical package. Electrical performance and PCB footprint compatibility are identical.

Q: Can I use SMBJP6KE6.8A-TP in place of P6SMB6.8A-M3/5B?

A: Yes. SMBJP6KE6.8A-TP is electrically equivalent with 5.8V standoff, 10.5V clamping, and 58.1A peak pulse current. It offers extended operating temperature range (-55°C ~ 175°C). Mechanical compatibility is confirmed through DO-214AA SMB packaging.