Equivalent & Substitute Parts for P6SMB12C

Part Overview

The P6SMB12C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression with a reverse standoff voltage of 10.2V and peak pulse power rating of 600W. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	P6SMB12C
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	10.2V
Voltage - Breakdown (Min)	10.8V
Voltage - Clamping (Max) @ Ipp	17.54V
Current - Peak Pulse (10/1000µs)	36.5A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-214AA, SMB
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the P6SMB12C is determined by the following critical parameters:

Reverse standoff voltage: 10.2V (Typ)
Breakdown voltage minimum: 10.8V or higher
Clamping voltage maximum @ Ipp: Must accommodate circuit protection requirements
Peak pulse current rating: 36.5A or higher
Peak pulse power rating: 600W
Package type: DO-214AA / SMB surface mount
Bidirectional operation: Single channel
Operating temperature range: -55°C to 150°C minimum
RoHS3 compliance and MSL 1 rating

Substitute parts must maintain electrical compatibility within these parameters while offering active product status for long-term availability.

Parameter Comparison

Parameter	P6SMB12C (Main)	P6SMB12CA	SZP6SMB12CAT3G	SM6T12CA-E3/52	SMBJP6KE12CA-TP
Manufacturer	Littelfuse Inc.	Good-Ark Semiconductor	Littelfuse Inc.	Vishay General Semiconductor	Micro Commercial Co
Product Status	Obsolete	Active	Active	Active	Active
Voltage - Reverse Standoff (Typ)	10.2V	10.2V	10.2V	10.2V	10.2V
Voltage - Breakdown (Min)	10.8V	11.4V	11.4V	11.4V	11.4V
Voltage - Clamping (Max) @ Ipp	17.54V	16.7V	16.7V	16.7V	16.7V
Current - Peak Pulse (10/1000µs)	36.5A	35.9A	36A	36A	36.5A
Power - Peak Pulse	600W	600W	600W	600W	600W
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 175°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts maintain active product status, ensuring long-term availability and supply chain continuity compared to the obsolete P6SMB12C.

P6SMB12CA (Good-Ark Semiconductor): Active status with identical reverse standoff voltage and matching power rating. Clamping voltage reduced to 16.7V provides tighter voltage regulation. Peak pulse current of 35.9A meets the original specification. Suitable for direct replacement in general-purpose applications.

SZP6SMB12CAT3G (Littelfuse Inc.): Active status with automotive-grade qualification (AEC-Q101) and extended temperature range to -65°C. Clamping voltage of 16.7V and peak pulse current of 36A provide equivalent performance. Recommended for applications requiring automotive compliance or extended low-temperature operation.

SM6T12CA-E3/52 (Vishay General Semiconductor): Active status with extended temperature range to -65°C. Clamping voltage of 16.7V and peak pulse current of 36A maintain electrical compatibility. Suitable for applications requiring wider temperature operating margins.

SMBJP6KE12CA-TP (Micro Commercial Co): Active status with extended temperature range to 175°C. Peak pulse current of 36.5A matches the original specification exactly. Clamping voltage of 16.7V provides equivalent protection. Recommended for high-temperature applications.

All substitute parts are ROHS3 compliant with MSL 1 rating, maintaining environmental and handling compatibility with the original component.

Frequently Asked Questions (FAQ)

Q: Can P6SMB12CA be used as a direct replacement for P6SMB12C?

A: Yes. Both parts share identical reverse standoff voltage (10.2V), peak pulse power rating (600W), and DO-214AA SMB package. The clamping voltage difference (16.7V vs 17.54V) represents tighter voltage regulation, which is acceptable for most general-purpose transient suppression circuits. Verify circuit requirements before substitution.

Q: What is the difference between the clamping voltages in the substitute parts?

A: The P6SMB12C specifies 17.54V maximum clamping voltage. Substitute parts P6SMB12CA, SZP6SMB12CAT3G, SM6T12CA-E3/52, and SMBJP6KE12CA-TP all specify 16.7V maximum clamping voltage. Lower clamping voltage provides more aggressive transient suppression. Circuit design must accommodate this parameter variation.

Q: Which substitute part is recommended for automotive applications?

A: SZP6SMB12CAT3G is qualified to AEC-Q101 automotive standard and carries automotive-grade designation. This part is the appropriate selection for automotive circuit protection requirements.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use DO-214AA SMB surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts designed for P6SMB12C.

Q: What is the temperature operating range difference between substitute parts?

A: P6SMB12CA operates -55°C to 150°C. SZP6SMB12CAT3G and SM6T12CA-E3/52 extend to -65°C minimum. SMBJP6KE12CA-TP extends to 175°C maximum. Select based on application temperature requirements.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating, maintaining environmental and handling compatibility with the original P6SMB12C specification.

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