P6SMB7.5 Equivalent & Substitute Parts

Part Overview

The P6SMB7.5 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. The device features a 6.4V reverse standoff voltage, 11.87V maximum clamping voltage, and 54A peak pulse current capability in a DO-214AA (SMB) package. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	6.4	V
Voltage - Breakdown (Min)	6.75	V
Voltage - Clamping (Max) @ Ipp	11.87	V
Current - Peak Pulse (10/1000µs)	54	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the P6SMB7.5 is determined by strict equivalence across the following electrical and mechanical parameters:

Reverse standoff voltage: 6.4V (Typ)
Breakdown voltage minimum: 6.75V to 7.13V range
Clamping voltage maximum: 11.3V to 11.87V range
Peak pulse current: 53A to 55A (10/1000µs pulse)
Peak pulse power: 600W
Package: DO-214AA (SMB)
Mounting: Surface Mount
Temperature range: -55°C to 150°C minimum
RoHS3 compliance

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

Group A (Clamping 11.3V): P6SMB7.5A, SM6T7V5A-E3/52, SM6T7V5A-E3/5B, SMBJP6KE7.5A-TP, TVP06B7V5A-G. These devices operate at the lower end of the clamping voltage specification with peak pulse currents of 53A to 55A.

Group B (Clamping 14.5V): SM6T7V5A, SM6T7V5AY. These devices exhibit higher clamping voltage performance (14.5V) with significantly elevated peak pulse current capability (276A at 8/20µs pulse), suitable for applications requiring enhanced transient suppression.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (Max) @ Ipp (V)	Current - Peak Pulse (A)	Operating Temperature (°C)	Product Status	Package
P6SMB7.5	Littelfuse Inc.	6.4	11.87	54	-55 to 150	Obsolete	DO-214AA (SMBJ)
P6SMB7.5A	Taiwan Semiconductor Corporation	6.4	11.3	55	-55 to 150	Active	DO-214AA (SMB)
SM6T7V5A	STMicroelectronics	6.4	14.5	276 (8/20µs)	-55 to 150	Active	DO-214AA (SMB)
SM6T7V5A-E3/52	Vishay General Semiconductor - Diodes Division	6.4	11.3	53	-65 to 150	Active	DO-214AA (SMBJ)
SM6T7V5A-E3/5B	Vishay General Semiconductor - Diodes Division	6.4	11.3	53	-65 to 150	Active	DO-214AA (SMBJ)
SM6T7V5AY	STMicroelectronics	6.4	14.5	276 (8/20µs)	-55 to 150	Active	DO-214AA (SMB)
SMBJP6KE7.5A-TP	Micro Commercial Co	6.4	11.3	54	-55 to 175	Active	DO-214AA (SMBJ)
TVP06B7V5A-G	Comchip Technology	6.4	11.3	53.1	-55 to 150	Active	DO-214AA (SMB)

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and RoHS/REACH compliance status, ensuring regulatory alignment for current manufacturing standards.

For direct electrical equivalence: P6SMB7.5A (Taiwan Semiconductor Corporation), SM6T7V5A-E3/52 (Vishay), SM6T7V5A-E3/5B (Vishay), SMBJP6KE7.5A-TP (Micro Commercial Co), and TVP06B7V5A-G (Comchip Technology) provide clamping voltages within 11.3V, matching the original specification within acceptable tolerance. These parts maintain 53A to 55A peak pulse current ratings and are suitable for direct replacement in existing designs.

For enhanced performance: SM6T7V5A (STMicroelectronics) and SM6T7V5AY (STMicroelectronics) offer 14.5V clamping voltage with 276A peak pulse current capability (8/20µs pulse), providing superior transient suppression for applications requiring higher energy absorption. SM6T7V5AY includes AEC-Q101 automotive qualification.

Temperature considerations: SM6T7V5A-E3/52 and SM6T7V5A-E3/5B extend the lower operating temperature to -65°C, suitable for applications requiring enhanced cold-temperature performance. SMBJP6KE7.5A-TP extends the upper operating temperature to 175°C for high-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can SM6T7V5A or SM6T7V5AY be used as direct replacements for P6SMB7.5?

A: These parts share identical reverse standoff voltage (6.4V) and package (DO-214AA SMB), but exhibit higher clamping voltage (14.5V vs. 11.87V) and significantly higher peak pulse current (276A vs. 54A). They are electrically compatible for overvoltage protection but provide enhanced suppression performance. Circuit validation is required to confirm suitability for the specific application.

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

A: Group A substitutes (P6SMB7.5A, SM6T7V5A-E3/52, SM6T7V5A-E3/5B, SMBJP6KE7.5A-TP, TVP06B7V5A-G) maintain clamping voltage near the original specification (11.3V) with comparable peak pulse current (53A–55A). Group B substitutes (SM6T7V5A, SM6T7V5AY) provide higher clamping voltage (14.5V) and substantially higher peak pulse current (276A), suitable for applications requiring enhanced transient energy absorption.

Q: Are all substitute parts available in the same package?

A: All substitute parts are available in DO-214AA (SMB) surface-mount package. Packaging variants include Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel®. Verify packaging format (SMBJ vs. SMB designation) with your supplier for PCB assembly compatibility.

Q: Which substitute offers the widest operating temperature range?

A: SM6T7V5A-E3/52 and SM6T7V5A-E3/5B (Vishay) extend the lower operating temperature to -65°C, compared to -55°C for most alternatives. SMBJP6KE7.5A-TP (Micro Commercial Co) extends the upper operating temperature to 175°C.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and carry REACH Unaffected or REACH Compliant status, meeting current environmental and regulatory requirements for electronic component manufacturing.

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