P6SMB9.1A-E3/52 Equivalent & Substitute Parts

Part Overview

The P6SMB9.1A-E3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and provides transient overvoltage protection for general-purpose applications. With a reverse standoff voltage of 7.78V and clamping voltage of 13.4V at peak pulse current, this active product is widely used in circuit protection designs. Equivalent and substitute parts are identified based on matching electrical characteristics and package compatibility to support procurement flexibility and supply chain continuity.

Substiute Parts

P6SMB9.1A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 1068P6SMB9.1A-E3/52 Datasheet

Current PartRFQ

SM6T10A

STMicroelectronicsIn Stock: 15265SM6T10A Datasheet

DirectRFQ

1KSMB9.1A

Littelfuse Inc.In Stock: 303071KSMB9.1A Datasheet

MFR RecommendedRFQ

P6SMB9.1A

Taiwan Semiconductor CorporationIn Stock: 23875P6SMB9.1A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P6SMB9.1A-E3/52 are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Reverse Standoff Voltage (Typ): 7.78V
• Voltage - Clamping (Max) @ Ipp: 13.4V
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional

Secondary Compatibility Factors:

• Voltage - Breakdown (Min): 8.65V
• Operating Temperature Range: Minimum -55°C to 150°C
• RoHS3 Compliance
• Product Status: Active

Substitute parts maintain the same voltage protection characteristics and package footprint, ensuring direct replacement capability in circuit designs. Peak pulse current and power dissipation may vary within acceptable ranges for the application category.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Substitutes):

The 1KSMB9.1A (Littelfuse Inc.) and P6SMB9.1A (Taiwan Semiconductor Corporation) are direct functional equivalents to the P6SMB9.1A-E3/52. Both parts maintain identical voltage specifications (7.78V reverse standoff, 8.65V breakdown minimum, 13.4V clamping maximum), identical package configuration (DO-214AA, SMB), and active product status with ROHS3 compliance. The 1KSMB9.1A offers higher peak pulse power dissipation (1000W versus 600W), providing additional design margin. Both substitutes operate across the required temperature range and are suitable for direct PCB replacement.

Alternative Substitute (Limited Application):

The SM6T10A (STMicroelectronics) shares the same DO-214AA package and surface mount configuration but exhibits different voltage characteristics. With an 8.55V reverse standoff and 18.6V clamping voltage, this part operates at a higher voltage threshold and may not provide equivalent protection in circuits designed for the 7.78V / 13.4V specification. This substitute is applicable only in applications where the higher voltage rating is acceptable and does not compromise circuit protection requirements. All substitute parts maintain ROHS3 compliance and active product status.

Frequently Asked Questions (FAQ)

Q: Can SM6T10A be used as a direct replacement for P6SMB9.1A-E3/52?

A: SM6T10A is not a direct replacement. While both parts share the DO-214AA SMB package and surface mount configuration, the SM6T10A operates at different voltage specifications (8.55V reverse standoff, 18.6V clamping) compared to the P6SMB9.1A-E3/52 (7.78V reverse standoff, 13.4V clamping). Use SM6T10A only if your circuit design permits the higher voltage threshold.

Q: Are 1KSMB9.1A and P6SMB9.1A (Taiwan Semiconductor) true equivalents?

A: Yes. Both parts match the P6SMB9.1A-E3/52 across all critical parameters: 7.78V reverse standoff voltage, 8.65V minimum breakdown voltage, 13.4V clamping voltage, DO-214AA SMB package, surface mount configuration, and operating temperature range of -55°C to 150°C minimum. Both are ROHS3 compliant and active products.

Q: What is the difference between the 1KSMB9.1A and P6SMB9.1A-E3/52 in terms of power handling?

A: The 1KSMB9.1A is rated for 1000W peak pulse power, while the P6SMB9.1A-E3/52 is rated for 600W. This higher power rating in the Littelfuse part provides additional thermal margin and may be beneficial in high-energy transient environments.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts—SM6T10A, 1KSMB9.1A, and P6SMB9.1A (Taiwan Semiconductor)—are ROHS3 compliant, matching the compliance status of the P6SMB9.1A-E3/52.

Q: Can I use these substitutes interchangeably on the same PCB?

A: The 1KSMB9.1A and P6SMB9.1A (Taiwan Semiconductor) are mechanically and electrically interchangeable with the P6SMB9.1A-E3/52 due to identical package specifications and voltage ratings. The SM6T10A shares the same package but operates at different voltage levels; use only if your circuit design accommodates the higher voltage threshold.

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

A: The P6SMB9.1A-E3/52 operates from -65°C to 150°C. The SM6T10A, 1KSMB9.1A, and P6SMB9.1A (Taiwan Semiconductor) all operate from -55°C to 150°C, which covers most industrial and commercial applications but may not meet designs requiring the extended -65°C lower limit.