P6SMB39CA-M3/5B Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The P6SMB39CA-M3/5B is a bidirectional Zener transient voltage suppressor 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 device is Active product status and RoHS3 compliant. Substitute parts are necessary to address supply chain availability, packaging preferences, temperature range requirements, or performance specifications that may vary across manufacturers while maintaining electrical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	33.3	V
Voltage - Breakdown (Min)	37.1	V
Voltage - Clamping (Max) @ Ipp	53.9	V
Current - Peak Pulse (10/1000µs)	11.1	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

Substitution eligibility for the P6SMB39CA-M3/5B is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 33.3V
Voltage - Breakdown (Min): 37.1V (minimum tolerance)
Voltage - Clamping (Max) @ Ipp: 53.9V (maximum tolerance)
Current - Peak Pulse (10/1000µs): minimum 11.1A
Power - Peak Pulse: minimum 600W
Package / Case: DO-214AA, SMB (surface mount)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts must maintain electrical equivalence within these parameters. Operating temperature range, packaging format (Tape & Reel vs. Cut Tape), and manufacturer-specific certifications (such as AEC-Q101 for automotive applications) may vary without affecting functional substitution for general-purpose applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temperature (°C)	Package	RoHS Status
P6SMB39CA-M3/5B	Vishay General Semiconductor	33.3	37.1	53.9	11.1	600	-65 to 150	DO-214AA, SMB	ROHS3
1KSMB39CA	Taiwan Semiconductor Corporation	33.3	37.1	53.9	18.6	1000	-55 to 175	DO-214AA, SMB	ROHS3
P6SMB39CA	Meritek	33.3	37.05	53.9	11.13	600	-55 to 150	DO-214AA, SMB	ROHS3
SM6T39CA	STMicroelectronics	33.3	37.1	69.7	57	600	-55 to 150	DO-214AA, SMB	ROHS3
SM6T39CAY	STMicroelectronics	33.3	37.1	69.7	57	600	-55 to 150	DO-214AA, SMB	ROHS3
SMBJP6KE39CA-TP	Micro Commercial Co	33.3	37.1	53.9	11.3	600	-55 to 175	DO-214AA, SMB	ROHS3
SZP6SMB39CAT3G	Littelfuse Inc.	33.3	37.1	53.9	11.2	600	-65 to 150	DO-214AA, SMB	ROHS3
TPSMB39CA	Littelfuse Inc.	33.3	37.1	53.9	11.3	600	-65 to 175	DO-214AA, SMB	ROHS3

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, meeting the core electrical requirements for general-purpose transient voltage suppression applications.

Direct Electrical Equivalents (Voltage and Power Matching): The 1KSMB39CA, P6SMB39CA (Meritek), SMBJP6KE39CA-TP, SZP6SMB39CAT3G, and TPSMB39CA all maintain the 33.3V reverse standoff voltage, 53.9V clamping voltage, and 600W peak pulse power specifications. These parts differ primarily in peak pulse current ratings (11.1A to 18.6A) and operating temperature ranges. The 1KSMB39CA offers enhanced current handling (18.6A) and extended temperature range (-55°C to 175°C), making it suitable for applications requiring higher transient energy absorption.

Higher Performance Alternative: The SM6T39CA and SM6T39CAY (STMicroelectronics TRANSIL™ series) maintain voltage equivalence but feature significantly higher peak pulse current (57A at 8/20µs) and clamping voltage (69.7V). These are suitable for applications requiring enhanced transient suppression capability. The SM6T39CAY variant includes AEC-Q101 automotive qualification.

Automotive-Grade Options: The SM6T39CAY and SZP6SMB39CAT3G both carry AEC-Q101 qualification for automotive applications, while maintaining electrical compatibility with the base P6SMB39CA-M3/5B specification.

Temperature Range Considerations: The TPSMB39CA and 1KSMB39CA extend the upper operating temperature to 175°C, compared to the 150°C maximum of the original part. The P6SMB39CA-M3/5B and SZP6SMB39CAT3G maintain the -65°C lower temperature limit, while other substitutes operate from -55°C minimum.

Frequently Asked Questions (FAQ)

Q: Can I use the 1KSMB39CA as a direct replacement for the P6SMB39CA-M3/5B?

A: Yes. The 1KSMB39CA maintains the critical voltage parameters (33.3V reverse standoff, 53.9V clamping) and package specification (DO-214AA, SMB). The higher peak pulse current (18.6A vs. 11.1A) and peak pulse power (1000W vs. 600W) provide enhanced transient suppression capability without compromising compatibility. The extended operating temperature range (-55°C to 175°C) may be beneficial for certain applications.

Q: What is the difference between the SM6T39CA and the P6SMB39CA-M3/5B?

A: Both maintain the same reverse standoff voltage (33.3V) and package (DO-214AA, SMB). The SM6T39CA features a higher clamping voltage (69.7V vs. 53.9V) and significantly higher peak pulse current (57A vs. 11.1A). This makes the SM6T39CA suitable for applications requiring greater transient energy absorption, but it is not a direct one-to-one replacement if the 53.9V clamping voltage is a design requirement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status, meeting environmental and regulatory requirements equivalent to the original P6SMB39CA-M3/5B.

Q: What packaging formats are available?

A: Substitute parts are available in Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats. The original P6SMB39CA-M3/5B is supplied in Tape & Box (TB) format. All maintain the same DO-214AA (SMB) component package for surface mount assembly.

Q: Can I use the SM6T39CAY in place of the P6SMB39CA-M3/5B in a non-automotive application?

A: Yes. The SM6T39CAY is AEC-Q101 qualified for automotive use, but this certification does not restrict its use in general-purpose applications. The higher peak pulse current and clamping voltage provide enhanced performance characteristics suitable for general transient voltage suppression.

Q: What is the Moisture Sensitivity Level (MSL) for all substitute parts?

A: All substitute parts, including the original P6SMB39CA-M3/5B, carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

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