P6SMBJ7.5CA Equivalent & Substitute Parts

Part Overview

The P6SMBJ7.5CA is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This part operates with a 6.4V reverse standoff voltage, 11.3V maximum clamping voltage, and 600W peak pulse power rating in a DO-214AA (SMB) package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component sourcing.

Key Parameters

Parameter	Value
Manufacturer Part Number	P6SMBJ7.5CA
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Voltage - Reverse Standoff (Typ)	6.4V
Voltage - Breakdown (Min)	7.13V
Voltage - Clamping (Max) @ Ipp	11.3V
Current - Peak Pulse (10/1000µs)	54A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the P6SMBJ7.5CA is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 6.4V
Voltage - Breakdown (Min): 7.13V
Voltage - Clamping (Max) @ Ipp: 11.3V
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

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

Group 1 - Matched Clamping Voltage (11.3V): Parts with identical 11.3V maximum clamping voltage, maintaining exact electrical equivalence for voltage regulation characteristics.

Group 2 - Higher Clamping Voltage (14.5V): Parts with elevated clamping voltage, suitable for applications with higher transient tolerance but requiring circuit-level validation.

Parameter Comparison

Parameter	P6SMBJ7.5CA (Main)	P6SMB7.5CA (TSC)	SMBJP6KE7.5CA-TP (MCC)	SM6T7V5CA-E3/52 (Vishay)	SM6T7V5CA-E3/5B (Vishay)	SM6T7V5CA (STM)	SM6T7V5CAY (STM)
Voltage - Reverse Standoff (Typ)	6.4V	6.4V	6.4V	6.4V	6.4V	6.4V	6.4V
Voltage - Breakdown (Min)	7.13V	7.13V	7.13V	7.13V	7.13V	7.13V	7.13V
Voltage - Clamping (Max) @ Ipp	11.3V	11.3V	11.3V	11.3V	11.3V	14.5V	14.5V
Current - Peak Pulse (10/1000µs)	54A	55A	54A	53A	53A	276A (8/20µs)	276A (8/20µs)
Power - Peak Pulse	600W	600W	600W	600W	600W	600W	600W
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMBJ	DO-214AA, SMBJ	DO-214AA, SMBJ	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 175°C	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Matched Electrical Performance):

P6SMB7.5CA (Taiwan Semiconductor Corporation) and SMBJP6KE7.5CA-TP (Micro Commercial Co) provide direct electrical equivalence with identical clamping voltage (11.3V) and power rating (600W). Both are active products with ROHS3 compliance. P6SMB7.5CA offers higher inventory availability (23,750 pcs). SMBJP6KE7.5CA-TP supports extended operating temperature to 175°C.

SM6T7V5CA-E3/52 and SM6T7V5CA-E3/5B (Vishay General Semiconductor) are functionally equivalent with 11.3V clamping voltage and extended lower temperature rating (-65°C). Both are active products with ROHS3 compliance and REACH unaffected status.

Secondary Substitutes (Higher Clamping Voltage):

SM6T7V5CA and SM6T7V5CAY (STMicroelectronics) feature 14.5V maximum clamping voltage with significantly higher peak pulse current (276A at 8/20µs). These parts are suitable only for applications where higher transient voltage tolerance is acceptable. SM6T7V5CAY includes AEC-Q101 automotive qualification.

All substitute parts maintain the DO-214AA (SMB/SMBJ) package footprint, surface-mount configuration, and 600W power rating required for direct PCB replacement.

Frequently Asked Questions (FAQ)

Q: Can P6SMB7.5CA directly replace P6SMBJ7.5CA?

A: Yes. P6SMB7.5CA matches all critical electrical parameters: 6.4V reverse standoff, 7.13V breakdown minimum, 11.3V clamping maximum, and 600W power rating. Both use DO-214AA package. The primary difference is product status (active vs. obsolete) and manufacturer (Taiwan Semiconductor Corporation vs. Littelfuse Inc.).

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

A: The 11.3V clamping parts (P6SMB7.5CA, SMBJP6KE7.5CA-TP, SM6T7V5CA-E3/52, SM6T7V5CA-E3/5B) provide identical voltage regulation to the original P6SMBJ7.5CA. The 14.5V clamping parts (SM6T7V5CA, SM6T7V5CAY) allow higher transient voltages before clamping, resulting in different circuit behavior. Selection depends on application overvoltage tolerance specifications.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the original P6SMBJ7.5CA compliance status.

Q: Does package designation (SMB vs. SMBJ) affect compatibility?

A: No. Both SMB and SMBJ designations refer to the DO-214AA package with identical footprint and pin configuration. The designations reflect manufacturer nomenclature variations but do not affect PCB placement or electrical performance.

Q: Which substitute offers the best inventory availability?

A: P6SMB7.5CA (Taiwan Semiconductor Corporation) provides the highest inventory level at 23,750 pcs, followed by SM6T7V5CA-E3/52 (Vishay) at 30,300 pcs.

Q: Can SM6T7V5CAY be used in non-automotive applications?

A: Yes. SM6T7V5CAY is AEC-Q101 qualified for automotive use but is not restricted to automotive applications. It functions as a general-purpose TVS diode in any application requiring its electrical specifications.

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