Equivalent & Substitute Parts for P6SMBJ7.5A

Part Overview

The P6SMBJ7.5A is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., housed in a DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 6.4V reverse standoff voltage and 11.3V maximum clamping voltage. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

P6SMBJ7.5A

Littelfuse Inc.In Stock: 30302P6SMBJ7.5A Datasheet

Current PartRFQ

P6SMB7.5A

Taiwan Semiconductor CorporationIn Stock: 300116P6SMB7.5A Datasheet

MFR RecommendedRFQ

SMBJP6KE7.5A-TP

Micro Commercial CoIn Stock: 827SMBJP6KE7.5A-TP Datasheet

DirectRFQ

P6SMB7.5A

Taiwan Semiconductor CorporationIn Stock: 300116P6SMB7.5A Datasheet

MFR RecommendedRFQ

SM6T7V5A

STMicroelectronicsIn Stock: 9706SM6T7V5A Datasheet

MFR RecommendedRFQ

SM6T7V5A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1172SM6T7V5A-E3/5B Datasheet

MFR RecommendedRFQ

SM6T7V5AY

STMicroelectronicsIn Stock: 1581SM6T7V5AY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P6SMBJ7.5A are qualified based on the following critical parameters:

• Voltage - Reverse Standoff (Typ): 6.4V
• Voltage - Breakdown (Min): 7.13V
• Voltage - Clamping (Max) @ Ipp: 11.3V (with tolerance for minor variations)
• Current - Peak Pulse (10/1000µs): 54A minimum
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents: Parts with matching voltage parameters (6.4V standoff, 7.13V breakdown, 11.3V clamping) and comparable peak pulse current ratings (53A–55A). These parts are pin-compatible and functionally interchangeable in the same circuit application.

Category B - Functional Alternatives: Parts with the same standoff and breakdown voltages but higher clamping voltages (14.5V) and significantly higher peak pulse current ratings (276A). These parts provide enhanced transient suppression capability and are suitable for applications requiring greater surge handling capacity, though they introduce a higher clamping voltage that must be verified against circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents):

P6SMB7.5A (Taiwan Semiconductor Corporation), SMBJP6KE7.5A-TP (Micro Commercial Co), and SM6T7V5A-E3/5B (Vishay General Semiconductor) are the recommended direct substitutes. These parts maintain identical voltage parameters (6.4V standoff, 7.13V breakdown, 11.3V clamping) and comparable peak pulse current ratings (53A–55A). All three are active products with ROHS3 compliance and MSL 1 rating. The P6SMB7.5A offers the highest inventory availability (300,100 pcs) and is manufactured by an established semiconductor supplier. The SMBJP6KE7.5A-TP supports an extended operating temperature range to 175°C, providing additional thermal margin. The SM6T7V5A-E3/5B extends the lower operating temperature to -65°C, suitable for extreme cold environments.

Alternative Substitutes (Enhanced Capability):

SM6T7V5A and SM6T7V5AY (both STMicroelectronics) feature higher clamping voltages (14.5V) and significantly higher peak pulse current ratings (276A at 8/20µs pulse). These parts are suitable only when the circuit design can tolerate the higher clamping voltage and when enhanced transient suppression capability is required. The SM6T7V5AY carries AEC-Q101 automotive qualification, making it appropriate for automotive applications.

Selection Criteria:

• For standard general-purpose applications requiring direct replacement: select P6SMB7.5A, SMBJP6KE7.5A-TP, or SM6T7V5A-E3/5B.
• For applications requiring extended temperature range: SMBJP6KE7.5A-TP (-55°C to 175°C) or SM6T7V5A-E3/5B (-65°C to 150°C).
• For automotive applications: SM6T7V5AY with AEC-Q101 qualification.
• For enhanced surge handling: SM6T7V5A or SM6T7V5AY, provided circuit design accommodates 14.5V clamping voltage.

All recommended substitutes maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with modern manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can P6SMB7.5A be used as a direct replacement for P6SMBJ7.5A?

A: Yes. The P6SMB7.5A maintains identical voltage parameters (6.4V standoff, 7.13V breakdown, 11.3V clamping) and comparable peak pulse current (55A vs. 54A). Both are housed in DO-214AA SMB packages and are pin-compatible. The primary difference is manufacturer (Taiwan Semiconductor Corporation vs. Littelfuse Inc.) and packaging format (SMB vs. SMBJ variant).

Q: What is the difference between the 11.3V clamping voltage parts and the 14.5V clamping voltage parts?

A: Parts with 11.3V clamping (P6SMB7.5A, SMBJP6KE7.5A-TP, SM6T7V5A-E3/5B) provide tighter voltage suppression and are direct replacements for the original P6SMBJ7.5A. Parts with 14.5V clamping (SM6T7V5A, SM6T7V5AY) allow higher transient voltages to pass through before clamping, but offer significantly higher peak pulse current handling (276A vs. 54A). Selection depends on whether the circuit can tolerate the higher clamping voltage.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, meeting modern environmental and manufacturing standards.

Q: What is the difference between SM6T7V5A and SM6T7V5AY?

A: Both parts are manufactured by STMicroelectronics with identical electrical parameters (6.4V standoff, 14.5V clamping, 276A peak pulse current). The SM6T7V5AY carries AEC-Q101 automotive qualification and is designated for automotive applications. The SM6T7V5A is suitable for general-purpose applications.

Q: Can I use SMBJP6KE7.5A-TP in place of P6SMBJ7.5A if my circuit operates at temperatures above 150°C?

A: Yes. The SMBJP6KE7.5A-TP supports an extended operating temperature range of -55°C to 175°C, providing 25°C additional thermal margin compared to the original part's -55°C to 150°C range. All other electrical parameters remain compatible.

Q: What does MSL 1 (Unlimited) mean for component storage?

A: MSL 1 indicates the component has unlimited shelf life and does not require special moisture-controlled storage conditions. The part can be stored at standard ambient conditions without degradation, simplifying inventory management and procurement logistics.

Q: Are the DO-214AA and SMB package designations interchangeable?

A: Yes. DO-214AA and SMB refer to the same physical package format. The designations are used interchangeably by different manufacturers. SMBJ is a variant designation used by some manufacturers but refers to the same package footprint and pin configuration.