P6SMB6.8A-M3/52 Equivalent & Substitute Parts

Part Overview

The P6SMB6.8A-M3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and is designed for general-purpose transient voltage suppression applications. The part is Active status and RoHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and packaging format options while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	5.8	V
Voltage - Breakdown (Min)	6.45	V
Voltage - Clamping (Max) @ Ipp	10.5	V
Current - Peak Pulse (10/1000µs)	57.1	A
Power - Peak Pulse	600	W
Operating Temperature Range	-65°C to 150°C	TJ
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the P6SMB6.8A-M3/52 are qualified based on the following electrical and mechanical criteria:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 5.8V
Voltage - Breakdown (Min): 6.45V minimum
Voltage - Clamping (Max) @ Ipp: 10.5V maximum
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Operating Temperature: -55°C to 150°C minimum range
RoHS3 Compliance
MSL 1 (Unlimited)

Allowable Variations:

Current - Peak Pulse (10/1000µs): 57.1A to 95.2A (higher current capability acceptable)
Power - Peak Pulse: 600W to 1000W (higher power rating acceptable)
Packaging Format: Tape & Box (TB), Tape & Reel (TR), or Cut Tape (CT) & Digi-Reel®
Manufacturer: Vishay, Littelfuse, Taiwan Semiconductor Corporation, STMicroelectronics, or Micro Commercial Co

Substitutes meeting these criteria maintain functional equivalence while accommodating supply availability and packaging preferences.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	Packaging Format
P6SMB6.8A-M3/52	Vishay	5.8V	6.45V	10.5V	57.1A	600W	-65°C to 150°C	DO-214AA, SMB	Tape & Box (TB)
P6SMB6.8A-E3/52	Vishay	5.8V	6.45V	10.5V	57.1A	600W	-65°C to 150°C	DO-214AA, SMB	Tape & Reel (TR)
1KSMB6.8A	Littelfuse Inc.	5.8V	6.45V	10.5V	95.2A	1000W	-55°C to 150°C	DO-214AA, SMB	Tape & Reel (TR)
P6SMB6.8A	Taiwan Semiconductor Corporation	5.8V	6.46V	10.5V	60A	600W	-55°C to 150°C	DO-214AA, SMB	Cut Tape (CT) & Digi-Reel®
SM6T6V8A	STMicroelectronics	5.8V	6.45V	13.4V	298A (8/20µs)	600W	-55°C to 150°C	DO-214AA, SMB	Cut Tape (CT) & Digi-Reel®
SM6T6V8AY	STMicroelectronics	5.8V	6.45V	13.4V	298A (8/20µs)	600W	-55°C to 150°C	DO-214AA, SMB	Cut Tape (CT) & Digi-Reel®
SMBJP6KE6.8A-TP	Micro Commercial Co	5.8V	6.45V	10.5V	58.1A	600W	-55°C to 175°C	DO-214AA, SMB	Tape & Reel (TR)
SZP6SMB6.8AT3G	Littelfuse Inc.	5.8V	6.45V	10.5V	57A	600W	-65°C to 150°C	DO-214AA, SMB	Tape & Reel (TR)

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical Performance):

P6SMB6.8A-E3/52 (Vishay): Identical to the main part with Tape & Reel packaging. Recommended for high-volume procurement requiring reel format.
SMBJP6KE6.8A-TP (Micro Commercial Co): Matches all critical parameters with extended operating temperature range (-55°C to 175°C). Suitable for applications requiring higher temperature margin.
SZP6SMB6.8AT3G (Littelfuse Inc.): Matches all critical parameters with AEC-Q101 automotive qualification. Recommended for automotive-grade applications.

Higher Performance Substitutes (Enhanced Capability):

1KSMB6.8A (Littelfuse Inc.): Provides 95.2A peak pulse current and 1000W power rating versus 57.1A and 600W. Acceptable for designs tolerating higher surge capacity. Operating temperature minimum is -55°C.
SM6T6V8A and SM6T6V8AY (STMicroelectronics): Provide 298A peak pulse current (8/20µs pulse) with 13.4V clamping voltage. SM6T6V8AY includes AEC-Q101 automotive qualification. These are suitable only if circuit design permits higher clamping voltage.

Packaging Considerations:

Tape & Box (TB): Original format, suitable for smaller quantities.
Tape & Reel (TR): Standard production format for automated assembly.
Cut Tape (CT) & Digi-Reel®: Flexible format supporting both manual and automated processes.

All substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can I substitute P6SMB6.8A-E3/52 for P6SMB6.8A-M3/52? A: Yes. Both parts are identical in electrical specifications and package. The difference is packaging format: P6SMB6.8A-M3/52 uses Tape & Box (TB) while P6SMB6.8A-E3/52 uses Tape & Reel (TR). Selection depends on procurement volume and assembly process requirements.

Q: What is the difference between the Littelfuse 1KSMB6.8A and the Vishay P6SMB6.8A-M3/52? A: The 1KSMB6.8A provides higher peak pulse current (95.2A versus 57.1A) and higher power rating (1000W versus 600W). Both maintain the same voltage specifications (5.8V standoff, 10.5V clamping). The 1KSMB6.8A is suitable for applications requiring enhanced transient suppression capability. Operating temperature minimum is -55°C versus -65°C for the original part.

Q: Are the STMicroelectronics SM6T6V8A and SM6T6V8AY direct substitutes? A: These parts share the same voltage standoff (5.8V) and breakdown characteristics but feature a higher clamping voltage (13.4V versus 10.5V) and significantly higher peak pulse current (298A). They are functionally equivalent only if circuit design accommodates the higher clamping voltage. SM6T6V8AY includes AEC-Q101 automotive qualification; SM6T6V8A does not.

Q: What does AEC-Q101 qualification mean? A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. Parts bearing this qualification (SM6T6V8AY and SZP6SMB6.8AT3G) have undergone additional reliability testing and are approved for automotive applications. Use these parts when automotive-grade components are specified.

Q: Can I use these parts interchangeably in my design? A: Parts with identical voltage specifications (5.8V standoff, 6.45V breakdown, 10.5V clamping) are directly interchangeable. Parts with different clamping voltages (SM6T6V8A, SM6T6V8AY at 13.4V) require circuit validation before substitution. Always verify packaging format compatibility with your assembly process.

Q: What is the significance of MSL 1 (Unlimited)? A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity limitations. These parts can be stored indefinitely without special moisture control measures and do not require baking before reflow soldering, simplifying inventory and assembly logistics.

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