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

Part Overview

The P6SMB6.8CA-M3/5B is an active Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and provides bidirectional transient voltage suppression for general purpose applications. The part is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1) and is currently in active production status with 1046 units in stock.

Equivalent and substitute parts are identified based on matching electrical characteristics and mechanical compatibility within the TVS diode category. Substitution is necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when sourcing from multiple manufacturers is needed for supply chain resilience.

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
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
Operating Temperature Range	-65°C ~ 150°C	TJ
Type	Zener	-
Bidirectional Channels	1	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the P6SMB6.8CA-M3/5B are classified based on the following substitution criteria:

Primary Substitution 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
Type: Zener, Bidirectional
RoHS Status: ROHS3 Compliant

Grouping Logic:

Group 1 - Direct Manufacturer Equivalents (Vishay): Parts with identical electrical specifications and packaging from the same manufacturer, differing only in tape format (Tape & Reel vs. Tape & Box).

Group 2 - Cross-Manufacturer Equivalents (Littelfuse, Taiwan Semiconductor, Micro Commercial Co): Parts meeting all primary substitution parameters with identical or superior electrical performance characteristics and compatible packaging.

Group 3 - Enhanced Performance Alternatives (STMicroelectronics): Parts meeting voltage specifications with enhanced current handling capability and clamping voltage characteristics, suitable for applications requiring higher transient energy absorption.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package	Operating Temperature	RoHS Status	Inventory
P6SMB6.8CA-M3/5B	Vishay	5.8V	6.45V	10.5V	57.1A	600W	DO-214AA (SMBJ)	-65°C ~ 150°C	ROHS3	1046 Pcs
P6SMB6.8CA-E3/5B	Vishay	5.8V	6.45V	10.5V	57.1A	600W	DO-214AA (SMB)	-65°C ~ 150°C	ROHS3	1486 Pcs
1KSMB6.8CA	Littelfuse Inc.	5.8V	6.45V	10.5V	95.2A	1000W	DO-214AA (SMBJ)	-55°C ~ 150°C	ROHS3	10400 Pcs
P6SMB6.8CA	Taiwan Semiconductor Corporation	5.8V	6.46V	10.5V	60A	600W	DO-214AA (SMB)	-55°C ~ 150°C	ROHS3	428400 Pcs
SM6T6V8CA	STMicroelectronics	5.8V	6.45V	13.4V	298A (8/20µs)	600W	DO-214AA (SMB)	-55°C ~ 150°C	ROHS3	24928 Pcs
SM6T6V8CAY	STMicroelectronics	5.8V	6.45V	13.4V	298A (8/20µs)	600W	DO-214AA (SMB)	-55°C ~ 150°C	ROHS3	3400 Pcs
SMBJP6KE6.8CA-TP	Micro Commercial Co	5.8V	6.45V	10.5V	58.1A	600W	DO-214AA (SMBJ)	-55°C ~ 175°C	ROHS3	1405 Pcs

Engineering Selection Recommendations

Direct Replacement (Identical Specifications): The P6SMB6.8CA-E3/5B from Vishay is a direct equivalent differing only in packaging format (Tape & Reel vs. Tape & Box). Both parts maintain identical electrical characteristics and operating temperature range. Selection between these variants depends on procurement and assembly requirements.

Cross-Manufacturer Equivalents: The P6SMB6.8CA from Taiwan Semiconductor Corporation and SMBJP6KE6.8CA-TP from Micro Commercial Co meet all primary electrical specifications with peak pulse current ratings of 60A and 58.1A respectively, both within acceptable tolerance of the original 57.1A specification. The Taiwan Semiconductor part offers significantly higher inventory availability (428400 units). The Micro Commercial Co part extends the operating temperature range to -55°C ~ 175°C, providing additional thermal margin for high-temperature applications.

Enhanced Performance Alternative: The 1KSMB6.8CA from Littelfuse and SM6T6V8CA/SM6T6V8CAY from STMicroelectronics provide enhanced transient suppression capability. The Littelfuse part delivers 95.2A peak pulse current and 1000W peak pulse power, representing a 67% increase in energy handling capacity while maintaining the 10.5V clamping voltage. The STMicroelectronics parts (SM6T6V8CA and SM6T6V8CAY) deliver 298A peak pulse current with 13.4V clamping voltage, suitable for applications requiring superior transient energy absorption. The SM6T6V8CAY variant includes AEC-Q101 automotive qualification.

All substitute parts maintain ROHS3 compliance and MSL 1 rating. Selection should be based on application requirements for peak pulse current, clamping voltage tolerance, operating temperature range, and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can I use the P6SMB6.8CA-E3/5B as a direct replacement for P6SMB6.8CA-M3/5B?

A: Yes. Both parts are manufactured by Vishay with identical electrical specifications. The difference is packaging format: P6SMB6.8CA-M3/5B uses Tape & Box (TB) while P6SMB6.8CA-E3/5B uses Tape & Reel (TR). Electrical performance and PCB assembly compatibility are identical.

Q: What is the difference between the Littelfuse 1KSMB6.8CA and the original Vishay part?

A: The 1KSMB6.8CA maintains the same 5.8V reverse standoff voltage and 10.5V clamping voltage as the P6SMB6.8CA-M3/5B. However, it provides higher peak pulse current (95.2A vs. 57.1A) and peak pulse power (1000W vs. 600W). This makes it suitable for applications requiring greater transient energy suppression while maintaining the same voltage characteristics.

Q: Can I use SM6T6V8CA or SM6T6V8CAY from STMicroelectronics as substitutes?

A: These parts are compatible substitutes with the same 5.8V reverse standoff voltage and 6.45V breakdown voltage. However, they feature a higher clamping voltage of 13.4V compared to the original 10.5V, and significantly higher peak pulse current (298A). Use these parts only if your circuit design can accommodate the higher clamping voltage, or if enhanced transient suppression is required.

Q: What is the difference between SM6T6V8CA and SM6T6V8CAY?

A: Both parts have identical electrical specifications. The SM6T6V8CAY includes AEC-Q101 automotive qualification and is designated for automotive applications. Select SM6T6V8CAY for automotive or high-reliability applications requiring automotive-grade component certification.

Q: Does the operating temperature range affect substitution compatibility?

A: The original P6SMB6.8CA-M3/5B operates from -65°C to 150°C. Most substitute parts operate from -55°C to 150°C, which is acceptable for most general purpose applications. The SMBJP6KE6.8CA-TP extends to -55°C ~ 175°C, providing additional high-temperature margin. Verify your application's temperature requirements before selection.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity level, matching the original part's environmental and regulatory status.

Q: Which substitute offers the best inventory availability?

A: The P6SMB6.8CA from Taiwan Semiconductor Corporation offers the highest inventory with 428400 units in stock, compared to 1046 units for the original part. This part maintains identical electrical specifications and is suitable for high-volume procurement.

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