P6SMBJ36 Equivalent & Substitute Parts

Part Overview

The P6SMBJ36 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features a 30.8V reverse standoff voltage, 52.4V maximum clamping voltage, and 600W peak pulse power rating in a surface-mount DO-214AA (SMB) package. The P6SMBJ36 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, power dissipation, and thermal operating ranges while conforming to the same package specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	30.8	V
Voltage - Breakdown (Min)	32.4	V
Voltage - Clamping (Max) @ Ipp	52.4	V
Current - Peak Pulse (10/1000µs)	12.2	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitute parts for the P6SMBJ36 are qualified based on the following critical parameters:

Voltage - Reverse Standoff (Typ): Must be 30.8V to ensure proper circuit protection threshold
Package / Case: Must be DO-214AA (SMB) for mechanical and thermal compatibility
Mounting Type: Must be Surface Mount
Type: Must be Zener diode
Unidirectional Channels: Must be 1 channel
Power - Peak Pulse: Must be 600W minimum
Operating Temperature Range: Must support -55°C to 150°C minimum

Substitute parts are grouped into two categories based on clamping voltage performance:

Group A (Tighter Clamping Voltage): Parts with 49.9V maximum clamping voltage, including P6SMB36A (Eaton), SZP6SMB36AT3G (Littelfuse), SMBJP6KE36A-TP (Micro Commercial Co), and SM6T36A-E3/52 (Vishay). These provide lower transient voltage peaks.

Group B (Higher Clamping Voltage): Parts with 64.3V maximum clamping voltage, including SM6T36A (STMicroelectronics) and SM6T36AY (STMicroelectronics). These allow higher transient voltages before clamping.

Parameter Comparison

Parameter	P6SMBJ36 (Main)	P6SMB36A	SZP6SMB36AT3G	SMBJP6KE36A-TP	SM6T36A-E3/52	SM6T36A	SM6T36AY
Manufacturer	Littelfuse	Eaton	Littelfuse Inc.	Micro Commercial Co	Vishay	STMicroelectronics	STMicroelectronics
Voltage - Reverse Standoff (Typ)	30.8V	30.8V	30.8V	30.8V	30.8V	30.8V	30.8V
Voltage - Breakdown (Min)	32.4V	34.2V	34.2V	34.2V	34.2V	34.2V	34.2V
Voltage - Clamping (Max) @ Ipp	52.4V	49.9V	49.9V	49.9V	49.9V	64.3V	64.3V
Current - Peak Pulse (10/1000µs)	12.2A	12.2A	12A	12.2A	12A	62A (8/20µs)	62A (8/20µs)
Power - Peak Pulse	600W	600W	600W	600W	600W	600W	600W
Operating Temperature Range	-55 to 150°C	-55 to 150°C	-65 to 150°C	-55 to 175°C	-65 to 150°C	-55 to 150°C	-55 to 150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All substitute parts listed maintain the core electrical specifications required for P6SMBJ36 replacement: 30.8V reverse standoff voltage, DO-214AA (SMB) package, surface-mount configuration, and 600W peak pulse power rating. All substitute parts carry Active product status, ensuring long-term availability and supply chain stability compared to the obsolete P6SMBJ36.

For Group A substitutes (49.9V clamping voltage): P6SMB36A, SZP6SMB36AT3G, SMBJP6KE36A-TP, and SM6T36A-E3/52 provide tighter voltage clamping characteristics. P6SMB36A (Eaton) and SMBJP6KE36A-TP (Micro Commercial Co) maintain the 12.2A peak pulse current specification. SZP6SMB36AT3G (Littelfuse) includes AEC-Q101 automotive qualification and extended temperature range (-65 to 150°C). SM6T36A-E3/52 (Vishay) offers extended lower temperature operation (-65°C) with 12A peak pulse current.

For Group B substitutes (64.3V clamping voltage): SM6T36A and SM6T36AY (both STMicroelectronics) feature significantly higher peak pulse current (62A at 8/20µs pulse) and higher clamping voltage. SM6T36AY includes AEC-Q101 automotive qualification. These parts are suitable for applications requiring higher transient energy absorption.

All substitute parts comply with RoHS3 and maintain MSL 1 (Unlimited) moisture sensitivity ratings. Selection between groups depends on circuit protection requirements: Group A for applications requiring lower clamping voltage peaks, Group B for higher energy transient environments.

Frequently Asked Questions (FAQ)

Q: Can I directly replace P6SMBJ36 with any of these substitute parts?

A: Yes, all listed substitute parts maintain the critical electrical parameters: 30.8V reverse standoff voltage, DO-214AA (SMB) package, and 600W peak pulse power rating. However, clamping voltage differs between groups. Group A (49.9V) provides tighter clamping than the original P6SMBJ36 (52.4V), while Group B (64.3V) allows higher transient peaks. Verify your circuit's transient voltage tolerance before selection.

Q: What is the difference between Group A and Group B substitutes?

A: Group A substitutes (P6SMB36A, SZP6SMB36AT3G, SMBJP6KE36A-TP, SM6T36A-E3/52) clamp at 49.9V maximum, providing lower transient voltage peaks. Group B substitutes (SM6T36A, SM6T36AY) clamp at 64.3V maximum and feature 62A peak pulse current (8/20µs), suitable for higher-energy transient environments. Choose based on your circuit's overvoltage protection requirements.

Q: Are all substitute parts in Active product status?

A: Yes. All substitute parts carry Active product status, ensuring ongoing manufacturing and supply availability. The original P6SMBJ36 is classified as Obsolete, making these Active alternatives necessary for new designs and production continuity.

Q: Do all substitute parts meet RoHS compliance?

A: Yes. All substitute parts are RoHS3 Compliant or RoHS Compliant, meeting environmental and regulatory requirements. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating.

Q: Which substitute offers automotive qualification?

A: SZP6SMB36AT3G (Littelfuse) and SM6T36AY (STMicroelectronics) both carry AEC-Q101 automotive qualification. SZP6SMB36AT3G also provides extended lower temperature operation (-65°C minimum).

Q: Can I use SM6T36A or SM6T36AY if my circuit only requires 12A peak pulse current?

A: Yes. SM6T36A and SM6T36AY are rated for 62A peak pulse current (8/20µs), which exceeds the 12.2A requirement of the original P6SMBJ36. These parts provide additional margin for transient energy absorption. However, verify that the higher clamping voltage (64.3V) is acceptable for your circuit design.

Q: What is the temperature operating range for each substitute?

A: Most substitutes support -55°C to 150°C. SZP6SMB36AT3G and SM6T36A-E3/52 extend to -65°C minimum. SMBJP6KE36A-TP extends to 175°C maximum. Verify your application's thermal requirements before selection.

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