P6SMBJ7.5C Equivalent & Substitute Parts

Part Overview

The P6SMBJ7.5C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional zener diode operates with a 6.4V reverse standoff voltage and provides 600W peak pulse power dissipation in a DO-214AA (SMB) package. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	P6SMBJ7.5C
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	6.4V
Voltage - Breakdown (Min)	6.75V
Voltage - Clamping (Max) @ Ipp	11.87V
Current - Peak Pulse (10/1000µs)	54A
Power - Peak Pulse	600W
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the P6SMBJ7.5C is determined by the following critical parameters that must remain consistent across equivalent parts:

Reverse standoff voltage: 6.4V (Typ)
Breakdown voltage range: 6.75V to 7.13V (Min)
Clamping voltage: 11.3V to 11.87V (Max @ Ipp)
Peak pulse current: 53A to 55A (10/1000µs)
Peak pulse power: 600W
Package type: DO-214AA (SMB)
Bidirectional configuration: Single channel
Operating temperature range: -55°C minimum to 150°C minimum
RoHS3 compliance
MSL rating: 1 (Unlimited)

All substitute parts listed maintain these electrical and mechanical specifications within acceptable engineering tolerances for direct replacement in the same circuit application.

Parameter Comparison

Parameter	P6SMBJ7.5C (Littelfuse)	P6SMB7.5CA (TSC)	SM6T7V5CA (STMicroelectronics)	SM6T7V5CA-E3/52 (Vishay)	SM6T7V5CA-E3/5B (Vishay)	SM6T7V5CAY (STMicroelectronics)	SMBJP6KE7.5CA-TP (MCC)
Voltage - Reverse Standoff (Typ)	6.4V	6.4V	6.4V	6.4V	6.4V	6.4V	6.4V
Voltage - Breakdown (Min)	6.75V	7.13V	7.13V	7.13V	7.13V	7.13V	7.13V
Voltage - Clamping (Max) @ Ipp	11.87V	11.3V	14.5V	11.3V	11.3V	14.5V	11.3V
Current - Peak Pulse (10/1000µs)	54A	55A	276A (8/20µs)	53A	53A	276A (8/20µs)	54A
Power - Peak Pulse	600W	600W	600W	600W	600W	600W	600W
Operating Temperature (Min)	-55°C	-55°C	-55°C	-65°C	-65°C	-55°C	-55°C
Operating Temperature (Max)	150°C	150°C	150°C	150°C	150°C	150°C	175°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMBJ	DO-214AA, SMBJ	DO-214AA, SMB	DO-214AA, SMBJ
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

All substitute parts listed are active products with ROHS3 compliance and MSL 1 (Unlimited) ratings, ensuring long-term availability and environmental regulatory compliance.

Primary substitutes (closest electrical match): P6SMB7.5CA (Taiwan Semiconductor Corporation), SM6T7V5CA-E3/52 (Vishay), SM6T7V5CA-E3/5B (Vishay), and SMBJP6KE7.5CA-TP (Micro Commercial Co) maintain clamping voltages between 11.3V and 11.87V, directly comparable to the original P6SMBJ7.5C specification.

Alternative substitutes (higher clamping voltage): SM6T7V5CA (STMicroelectronics) and SM6T7V5CAY (STMicroelectronics) feature 14.5V clamping voltage with significantly higher peak pulse current (276A at 8/20µs pulse width). These parts are suitable for applications requiring enhanced transient suppression capability within the same 6.4V standoff voltage class.

Extended temperature range option: SMBJP6KE7.5CA-TP supports operation to 175°C junction temperature, compared to 150°C for most alternatives, providing additional thermal margin in high-temperature environments.

Automotive-qualified option: SM6T7V5CAY carries AEC-Q101 qualification for automotive applications.

Frequently Asked Questions (FAQ)

Q: Can I use SM6T7V5CA or SM6T7V5CAY as direct replacements despite their higher clamping voltage?

A: Yes. Both parts maintain the same 6.4V reverse standoff voltage and 600W peak pulse power rating. The higher clamping voltage (14.5V vs. 11.87V) provides additional protection margin. Circuit validation is required to confirm the higher clamping voltage does not exceed downstream component voltage ratings.

Q: What is the difference between DO-214AA (SMB) and DO-214AA (SMBJ) package designations?

A: Both designations refer to the same physical DO-214AA package used for surface-mount diodes. The SMBJ designation is a variant marking used by some manufacturers. All parts listed are mechanically and electrically compatible in the same PCB footprint.

Q: Are the Vishay SM6T7V5CA-E3/52 and SM6T7V5CA-E3/5B parts interchangeable?

A: Yes. Both parts are electrically identical with 11.3V clamping voltage, 53A peak pulse current, and 600W power rating. The suffix difference (-E3/52 vs. -E3/5B) indicates different packaging tape configurations (Tape & Reel). Selection depends on assembly equipment compatibility.

Q: Which substitute offers the best long-term availability?

A: P6SMB7.5CA (Taiwan Semiconductor Corporation) and SM6T7V5CA-E3/52 (Vishay) show the highest inventory levels (23,750 and 30,300 units respectively) among active products, indicating strong market availability.

Q: Can I use these substitutes in automotive applications?

A: SM6T7V5CAY is AEC-Q101 qualified for automotive use. Other parts carry ROHS3 compliance but lack automotive qualification. Automotive applications require parts with explicit AEC-Q101 certification.

Q: What is the impact of different peak pulse current ratings (53A, 54A, 55A, 276A)?

A: All parts meet or exceed the original 54A specification at the 10/1000µs pulse width. The STMicroelectronics parts (SM6T7V5CA, SM6T7V5CAY) specify 276A at the 8/20µs pulse width, which is a different measurement standard. All parts provide adequate transient suppression for the same circuit application.

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