P6SMB150 Equivalent & Substitute Parts

Part Overview

The P6SMB150 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 128V reverse standoff voltage, 217.35V maximum clamping voltage, and 600W peak pulse power rating in a DO-214AA (SMB) package. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

P6SMB150

Littelfuse Inc.In Stock: 1200P6SMB150 Datasheet

Current PartRFQ

P6SMB150A

Good-Ark SemiconductorIn Stock: 41803P6SMB150A Datasheet

DirectRFQ

SZP6SMB150AT3G

Littelfuse Inc.In Stock: 3624SZP6SMB150AT3G Datasheet

MFR RecommendedRFQ

P6SMB150A

Good-Ark SemiconductorIn Stock: 41803P6SMB150A Datasheet

DirectRFQ

P6SMB150A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1177P6SMB150A-E3/5B Datasheet

DirectRFQ

SM6T150A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 776SM6T150A-E3/5B Datasheet

DirectRFQ

SM6T150A

STMicroelectronicsIn Stock: 36535SM6T150A Datasheet

MFR RecommendedRFQ

SMBJP6KE150A-TP

Micro Commercial CoIn Stock: 818SMBJP6KE150A-TP Datasheet

MFR RecommendedRFQ

TVP06B151A-G

Comchip TechnologyIn Stock: 1198TVP06B151A-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMB150 is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 128V
• Voltage - Clamping (Max) @ Ipp: Must not exceed 217.35V to maintain circuit protection integrity
• Current - Peak Pulse (10/1000µs): 2.9A minimum
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB (surface-mount compatibility)
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional (1 channel)
• Operating Temperature: -55°C to 150°C minimum range
• RoHS Status: ROHS3 Compliant

Substitute parts meeting these criteria are functionally equivalent for direct replacement in the P6SMB150 application circuit. Variations in clamping voltage within the specified range, manufacturer differences, and packaging options (Cut Tape vs. Tape & Reel) do not affect electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain the critical electrical parameters required for P6SMB150 replacement: 128V reverse standoff voltage, 2.9A peak pulse current, and 600W peak pulse power in DO-214AA SMB packaging.

Primary Substitutes (Closest Electrical Match): P6SMB150A, P6SMB150A-E3/5B, SM6T150A-E3/5B, SMBJP6KE150A-TP, and TVP06B151A-G all provide clamping voltages of 207V, which is within acceptable tolerance for the original 217.35V specification. These parts are all active status with ROHS3 compliance and MSL 1 rating.

Extended Temperature Range Option: SZP6SMB150AT3G and P6SMB150A-E3/5B extend the operating temperature range to -65°C, providing additional margin for applications requiring lower temperature performance. SZP6SMB150AT3G carries AEC-Q101 automotive qualification.

Higher Current Capability: SM6T150A from STMicroelectronics offers 15A peak pulse current (8/20µs) with 265V clamping voltage, suitable for applications requiring enhanced transient suppression beyond the original 2.9A specification, while maintaining the same 128V standoff voltage and SMB package.

Selection should be based on availability, packaging preference (Cut Tape vs. Tape & Reel), temperature range requirements, and any automotive or qualification certifications needed for the application.

Frequently Asked Questions (FAQ)

Q: Can P6SMB150A directly replace P6SMB150? A: Yes. P6SMB150A maintains the same 128V reverse standoff voltage, 2.9A peak pulse current, 600W power rating, and DO-214AA SMB package. The clamping voltage is 207V versus the original 217.35V, which is within acceptable operating tolerance for transient suppression circuits.

Q: What is the difference between the various substitute part numbers? A: The substitutes differ by manufacturer (Littelfuse, Vishay, STMicroelectronics, Micro Commercial Co, Comchip Technology), packaging format (Cut Tape vs. Tape & Reel), operating temperature range, and in one case (SM6T150A from STMicroelectronics), peak pulse current specification. All maintain the core 128V standoff and 600W power rating.

Q: Is the SM6T150A from STMicroelectronics compatible? A: SM6T150A is electrically compatible for the 128V standoff voltage and SMB package. However, it specifies 15A peak pulse current (8/20µs) and 265V clamping voltage, which differs from the original 2.9A and 217.35V. This part provides enhanced transient suppression capability and should be selected only if the application circuit can accommodate higher current handling.

Q: Do all substitutes have the same package? A: Yes. All substitute parts use DO-214AA (SMB) surface-mount packaging, ensuring mechanical and electrical compatibility with the original P6SMB150 PCB footprint.

Q: Are there temperature range differences between substitutes? A: Yes. Most substitutes operate from -55°C to 150°C, matching the original. SZP6SMB150AT3G and P6SMB150A-E3/5B extend the lower limit to -65°C. SMBJP6KE150A-TP extends the upper limit to 175°C. Select based on application temperature requirements.

Q: Which substitute has automotive qualification? A: SZP6SMB150AT3G from Littelfuse carries AEC-Q101 automotive qualification, suitable for automotive and high-reliability applications.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.