P6SMB36A-M3/5B Equivalent & Substitute Parts

Part Overview

The P6SMB36A-M3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 30.8V reverse standoff voltage class with a 49.9V maximum clamping voltage and 12A peak pulse current rating. The device is classified as Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified when electrical parameters and mechanical compatibility align within the specified tolerances for this voltage and current class.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	30.8	V
Voltage - Breakdown (Min)	34.2	V
Voltage - Clamping (Max) @ Ipp	49.9	V
Current - Peak Pulse (10/1000µs)	12	A
Power - Peak Pulse	600	W
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
Operating Temperature Range	-65°C ~ 150°C	TJ
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the P6SMB36A-M3/5B are grouped based on strict electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 30.8V
Voltage - Breakdown (Min): 34.2V
Voltage - Clamping (Max) @ Ipp: 49.9V
Package / Case: DO-214AA, SMB (surface mount)
Unidirectional Channels: 1
Type: Zener

Group 1: Direct Electrical Equivalents (Identical Clamping Voltage) Parts meeting all primary criteria with matching 49.9V clamping voltage and compatible current ratings (12A to 12.2A range).

Group 2: Enhanced Performance Variants (Higher Current Rating) Parts with identical voltage parameters but increased peak pulse current capability (20A), providing superior transient protection margin while maintaining electrical compatibility.

Group 3: Alternative Clamping Voltage (64.3V) Parts with identical reverse standoff and breakdown voltages but higher clamping voltage (64.3V) and significantly higher peak pulse current (62A). These are not direct substitutes but represent alternative protection levels within the same voltage class.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Package	Operating Temperature	RoHS Status
P6SMB36A-M3/5B	Vishay	30.8V	34.2V	49.9V	12A (10/1000µs)	600W	DO-214AA, SMB	-65°C ~ 150°C	ROHS3
P6SMB36A-E3/52	Vishay	30.8V	34.2V	49.9V	12A (10/1000µs)	600W	DO-214AA, SMB	-65°C ~ 150°C	ROHS3
1KSMB36A	Taiwan Semiconductor Corporation	30.8V	34.2V	49.9V	20A (10/1000µs)	1000W	DO-214AA, SMB	-55°C ~ 175°C	ROHS3
P6SMB36A	Eaton - Electronics Division	30.8V	34.2V	49.9V	12.2A (10/1000µs)	600W	DO-214AA, SMB	-55°C ~ 150°C	RoHS
SM6T36A	STMicroelectronics	30.8V	34.2V	64.3V	62A (8/20µs)	600W	DO-214AA, SMB	-55°C ~ 150°C	ROHS3
SM6T36AY	STMicroelectronics	30.8V	34.2V	64.3V	62A (8/20µs)	600W	DO-214AA, SMB	-55°C ~ 150°C	ROHS3
SMBJP6KE36A-TP	Micro Commercial Co	30.8V	34.2V	49.9V	12.2A (10/1000µs)	600W	DO-214AA, SMB	-55°C ~ 175°C	ROHS3
SZP6SMB36AT3G	Littelfuse Inc.	30.8V	34.2V	49.9V	12A (10/1000µs)	600W	DO-214AA, SMB	-65°C ~ 150°C	ROHS3

Engineering Selection Recommendations

Direct Substitutes (Group 1): P6SMB36A-E3/52, SMBJP6KE36A-TP, and SZP6SMB36AT3G are direct electrical equivalents with identical clamping voltage (49.9V) and compatible current ratings. These parts maintain full compatibility with the original P6SMB36A-M3/5B specification. P6SMB36A-E3/52 shares identical manufacturer (Vishay) and operating temperature range. SZP6SMB36AT3G (Littelfuse) matches the original temperature range (-65°C ~ 150°C) and includes AEC-Q101 automotive qualification. SMBJP6KE36A-TP (Micro Commercial Co) extends the upper operating temperature to 175°C.

Enhanced Performance Substitute (Group 2): 1KSMB36A (Taiwan Semiconductor Corporation) provides identical voltage parameters with doubled peak pulse current (20A) and increased power dissipation (1000W). This part is suitable for applications requiring higher transient protection margin. Operating temperature range extends to 175°C.

Alternative Protection Level (Group 3): SM6T36A and SM6T36AY (STMicroelectronics) maintain identical reverse standoff and breakdown voltages but feature higher clamping voltage (64.3V) and significantly higher peak pulse current (62A with 8/20µs pulse). SM6T36AY includes AEC-Q101 automotive qualification. These parts are not direct substitutes but represent enhanced protection for the same voltage class.

Compliance Considerations: All listed parts are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. Parts with AEC-Q101 qualification (SZP6SMB36AT3G, SM6T36AY) are suitable for automotive applications.

Frequently Asked Questions (FAQ)

Q: Can P6SMB36A-E3/52 replace P6SMB36A-M3/5B directly? A: Yes. Both parts are manufactured by Vishay with identical electrical parameters (30.8V standoff, 49.9V clamping, 12A peak pulse). The difference is packaging format: P6SMB36A-M3/5B uses Tape & Box (TB) while P6SMB36A-E3/52 uses Tape & Reel (TR). Electrical performance and PCB footprint are identical.

Q: What is the difference between the 49.9V clamping parts and SM6T36A/SM6T36AY? A: SM6T36A and SM6T36AY have higher clamping voltage (64.3V) and significantly higher peak pulse current (62A). These are not direct substitutes but alternative protection levels. Use these only if your circuit design specifically requires higher clamping voltage or greater transient current handling.

Q: Is 1KSMB36A a suitable replacement? A: 1KSMB36A maintains identical voltage parameters (30.8V standoff, 49.9V clamping) but provides enhanced current handling (20A vs. 12A) and power dissipation (1000W vs. 600W). It is electrically compatible and offers superior protection margin. Verify PCB layout accommodates the Taiwan Semiconductor Corporation part if switching manufacturers.

Q: Which substitute has automotive qualification? A: SZP6SMB36AT3G (Littelfuse) and SM6T36AY (STMicroelectronics) both carry AEC-Q101 automotive qualification. SZP6SMB36AT3G is a direct electrical equivalent with automotive grade. SM6T36AY has higher clamping voltage and current rating.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitute parts are RoHS3 compliant. The Eaton P6SMB36A part carries RoHS compliance (not specifically ROHS3). All parts have MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the impact of different operating temperature ranges? A: The original P6SMB36A-M3/5B operates -65°C ~ 150°C. SZP6SMB36AT3G matches this range. 1KSMB36A, SMBJP6KE36A-TP, and the Eaton/STMicroelectronics parts extend to -55°C minimum and/or 175°C maximum. Verify your application's temperature requirements before substitution.

Q: Can I use SM6T36AY in place of P6SMB36A-M3/5B? A: SM6T36AY is not a direct substitute due to higher clamping voltage (64.3V vs. 49.9V) and different peak pulse current specification (62A at 8/20µs vs. 12A at 10/1000µs). Use only if your circuit design accommodates higher clamping voltage and you require the enhanced current handling capability.

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