P6SMB6.8CA TVS Diode Equivalent & Substitute Parts

Part Overview

The P6SMB6.8CA is a transient voltage suppressor (TVS) diode manufactured by Central Semiconductor Corp, designed for general-purpose overvoltage protection in surface mount applications. This bidirectional Zener diode operates with a reverse standoff voltage of 5.8V and provides clamping at 10.5V with peak pulse current handling of 57A. The component is ROHS3 compliant and maintains unlimited moisture sensitivity rating (MSL 1). As an active product with 906 units in stock, equivalent alternatives are available from multiple manufacturers offering identical or comparable electrical performance in the DO-214AA (SMB) package format.

Key Parameters

Parameter	Value
Manufacturer Part Number	P6SMB6.8CA
Manufacturer	Central Semiconductor Corp
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Voltage - Reverse Standoff (Typ)	5.8V
Voltage - Breakdown (Min)	6.45V
Voltage - Clamping (Max) @ Ipp	10.5V
Current - Peak Pulse (10/1000µs)	57A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature	-65°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the P6SMB6.8CA are grouped based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - Reverse Standoff (Typ): 5.8V
Voltage - Clamping (Max) @ Ipp: 10.5V
Voltage - Breakdown (Min): 6.45V
Current - Peak Pulse (10/1000µs): 57A ±1A tolerance
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Operating Temperature Range: -65°C to 150°C minimum

Group 1 - Direct Electrical Equivalents (Identical Specifications): Parts meeting all critical parameters with identical clamping voltage and peak pulse current specifications within 1A tolerance.

Group 2 - Voltage-Compatible Alternatives (Different Peak Pulse Current): Parts with identical voltage specifications but different peak pulse current ratings, suitable for applications with lower transient current requirements.

Group 3 - Automotive-Grade Variants: Parts with identical electrical specifications but automotive qualification (AEC-Q101) for applications requiring automotive-grade components.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	RoHS Status
P6SMB6.8CA	Central Semiconductor Corp	5.8V	10.5V	57A	600W	-65°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
P6SMB6.8CA-E3/52	Vishay General Semiconductor - Diodes Division	5.8V	10.5V	57.1A	600W	-65°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
P6SMB6.8CA-E3/5B	Vishay General Semiconductor - Diodes Division	5.8V	10.5V	57.1A	600W	-65°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
SM6T6V8CA-E3/52	Vishay General Semiconductor - Diodes Division	5.8V	10.5V	57A	600W	-65°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
SM6T6V8CA-E3/5B	Vishay General Semiconductor - Diodes Division	5.8V	10.5V	57A	600W	-65°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJP6KE6.8CA-TP	Micro Commercial Co	5.8V	10.5V	58.1A	600W	-55°C ~ 175°C	DO-214AA, SMB	ROHS3 Compliant
SM6T6V8CA	STMicroelectronics	5.8V	13.4V	298A (8/20µs)	600W	-55°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
SM6T6V8CAY	STMicroelectronics	5.8V	13.4V	298A (8/20µs)	600W	-55°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
P6SMB62CA	Eaton - Electronics Division	53V	85V	7.2A	600W	-55°C ~ 150°C	DO-214AA, SMB	RoHS Compliant

Engineering Selection Recommendations

Direct Substitutes (Group 1 - Recommended for Pin-Compatible Replacement):

P6SMB6.8CA-E3/52, P6SMB6.8CA-E3/5B, SM6T6V8CA-E3/52, and SM6T6V8CA-E3/5B are direct electrical equivalents with identical voltage specifications (5.8V standoff, 10.5V clamping) and peak pulse current within 1A of the original part. All are ROHS3 compliant with -65°C to 150°C operating temperature range. These parts are suitable for direct substitution in existing designs without circuit modification. Vishay parts offer higher inventory availability (15,800 and 1,486 units respectively).

Alternative Substitutes (Group 2 - Higher Current Capability):

SMBJP6KE6.8CA-TP from Micro Commercial Co maintains identical voltage specifications with 58.1A peak pulse current and extended operating temperature range (-55°C to 175°C). This part is suitable for applications requiring enhanced thermal performance or higher transient current margins.

Non-Equivalent Alternatives (Group 3 - Different Electrical Characteristics):

SM6T6V8CA and SM6T6V8CAY from STMicroelectronics share the same 5.8V standoff voltage but feature higher clamping voltage (13.4V) and significantly higher peak pulse current (298A at 8/20µs pulse). These parts are not direct substitutes due to different clamping characteristics. SM6T6V8CAY includes automotive-grade qualification (AEC-Q101) for applications requiring automotive certification.

Non-Suitable Alternative:

P6SMB62CA from Eaton operates at 53V standoff with 85V clamping voltage and 7.2A peak pulse current. This part is designed for telecom applications and is not electrically compatible with the P6SMB6.8CA due to fundamentally different voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can I use P6SMB6.8CA-E3/52 as a direct replacement for P6SMB6.8CA?

A: Yes. Both parts have identical voltage specifications (5.8V standoff, 10.5V clamping), equivalent peak pulse current (57.1A vs 57A), and the same DO-214AA SMB package. Both are ROHS3 compliant with -65°C to 150°C operating temperature range. The primary difference is packaging format (Tape & Reel vs standard packaging) and manufacturer (Vishay vs Central Semiconductor).

Q: What is the difference between SM6T6V8CA and P6SMB6.8CA?

A: While both have 5.8V reverse standoff voltage, SM6T6V8CA has a higher clamping voltage (13.4V vs 10.5V) and significantly higher peak pulse current (298A vs 57A). These are not direct substitutes. SM6T6V8CA is suitable only for applications where higher clamping voltage is acceptable and greater transient current handling is required.

Q: Is SM6T6V8CAY suitable for automotive applications?

A: SM6T6V8CAY includes AEC-Q101 automotive qualification. However, it has different electrical characteristics than P6SMB6.8CA (13.4V clamping vs 10.5V, 298A vs 57A peak pulse current). It is suitable for automotive applications only if the circuit design accommodates these different specifications.

Q: Can I use SMBJP6KE6.8CA-TP in place of P6SMB6.8CA?

A: Yes, for most applications. SMBJP6KE6.8CA-TP maintains identical voltage specifications (5.8V standoff, 10.5V clamping) with slightly higher peak pulse current (58.1A vs 57A) and extended operating temperature range (-55°C to 175°C). The part is electrically compatible and suitable for direct substitution.

Q: Why is P6SMB62CA listed as a substitute if it has different voltage ratings?

A: P6SMB62CA is not a suitable substitute for P6SMB6.8CA. It operates at 53V standoff with 85V clamping voltage, designed for telecom applications. It is listed only because it was referenced in the original part's substitute list, but it is not electrically compatible due to fundamentally different voltage specifications.

Q: What packaging formats are available for equivalent parts?

A: All equivalent parts use DO-214AA (SMB) surface mount package. Packaging variations include Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats, which affect handling and ordering but do not change electrical performance or PCB footprint compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitutes (P6SMB6.8CA-E3/52, P6SMB6.8CA-E3/5B, SM6T6V8CA-E3/52, SM6T6V8CA-E3/5B, SMBJP6KE6.8CA-TP, SM6T6V8CA, and SM6T6V8CAY) are ROHS3 compliant. P6SMB62CA is RoHS compliant but not specifically ROHS3 certified.

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