SMBJ7.5C-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ7.5C-E3/5B is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 7.5V reverse standoff voltage, 14.3V maximum clamping voltage, and 42A peak pulse current capability in a DO-214AA (SMB) package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	7.5	V
Voltage - Breakdown (Min)	8.33	V
Voltage - Clamping (Max) @ Ipp	14.3	V
Current - Peak Pulse (10/1000µs)	42	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 for the SMBJ7.5C-E3/5B is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 7.5V
Voltage - Breakdown (Min): 8.33V
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:

Category A (Matched Clamping Voltage - 14.3V): Parts with identical 14.3V maximum clamping voltage and 42A peak pulse current, providing direct functional equivalence.

Category B (Lower Clamping Voltage - 12.9V): Parts with 12.9V maximum clamping voltage and higher peak pulse current (46.5A or 46.6A), offering alternative protection characteristics within the same voltage class and package.

All substitute parts maintain the same reverse standoff voltage (7.5V), breakdown voltage (8.33V), power rating (600W), and surface-mount DO-214AA package configuration.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (Max) @ Ipp (V)	Current - Peak Pulse (A)	Operating Temperature (°C)	Product Status	Packaging
SMBJ7.5C-E3/5B	Vishay General Semiconductor	7.5	14.3	42	-55 to 150	Obsolete	DO-214AA
SMBJ7.5CA-E3/5B	Vishay General Semiconductor	7.5	12.9	46.5	-55 to 150	Active	DO-214AA (TR)
SMBJ7.5CE3/TR13	Microchip Technology	7.5	14.3	42	-65 to 150	Active	SMBJ (TR)
SMBJ7.5CA	MDD	7.5	12.9	46.6	-50 to 150	Active	SMB/DO-214AA
SMBJ7.5CA-13-F	Diodes Incorporated	7.5	12.9	46.5	-55 to 150	Active	SMB (TR)
SMBJ7.5CA-TP	Micro Commercial Co	7.5	12.9	46.5	-55 to 175	Active	DO-214AA (TR)
SMBJ7.5CAE3/TR13	Microchip Technology	7.5	12.9	46.5	-65 to 150	Active	SMBJ (TR)
SMBJ7V5CA	Taiwan Semiconductor Corporation	7.5	12.9	46.5	-55 to 150	Active	DO-214AA (SMB)

Engineering Selection Recommendations

Primary Selection (Matched Performance): SMBJ7.5CE3/TR13 (Microchip Technology) is the recommended primary substitute. This part provides identical clamping voltage (14.3V) and peak pulse current (42A) to the original SMBJ7.5C-E3/5B, ensuring equivalent transient suppression performance. The part is active in production, ROHS3 compliant, and extends the operating temperature range to -65°C, providing enhanced thermal margin.

Secondary Selection (Alternative Performance): SMBJ7.5CA-E3/5B (Vishay General Semiconductor), SMBJ7.5CA-13-F (Diodes Incorporated), SMBJ7.5CA-TP (Micro Commercial Co), SMBJ7.5CAE3/TR13 (Microchip Technology), SMBJ7V5CA (Taiwan Semiconductor Corporation), and SMBJ7.5CA (MDD) are active alternatives with 12.9V clamping voltage and higher peak pulse current (46.5A or 46.6A). These parts maintain the same reverse standoff voltage and package configuration but offer different clamping characteristics. Selection among these alternatives depends on circuit-specific clamping voltage requirements and thermal operating range constraints.

All substitute parts are ROHS3 compliant and maintain the DO-214AA surface-mount package standard.

Frequently Asked Questions (FAQ)

Q: Can SMBJ7.5CA-E3/5B be used as a direct replacement for SMBJ7.5C-E3/5B? A: SMBJ7.5CA-E3/5B shares the same reverse standoff voltage (7.5V), breakdown voltage (8.33V), and package (DO-214AA), but features a lower clamping voltage (12.9V vs. 14.3V) and higher peak pulse current (46.5A vs. 42A). It is functionally compatible if the circuit design accommodates the lower clamping voltage specification.

Q: What is the difference between Category A and Category B substitutes? A: Category A substitutes (SMBJ7.5CE3/TR13) maintain the original 14.3V clamping voltage and 42A peak pulse current for direct functional equivalence. Category B substitutes feature 12.9V clamping voltage with 46.5A or 46.6A peak pulse current, offering alternative protection characteristics within the same voltage class. Selection depends on whether the circuit requires matched clamping voltage or can tolerate the lower clamping specification.

Q: Are all substitute parts available in the same package? A: All substitute parts use the DO-214AA (SMB) surface-mount package. Packaging configurations vary (Tape & Reel, Cut Tape, or standard), but the physical package footprint and pinout remain identical, ensuring PCB compatibility.

Q: What is the impact of operating temperature range differences? A: Substitute parts offer varying operating temperature ranges. SMBJ7.5CE3/TR13 and SMBJ7.5CAE3/TR13 extend to -65°C, while SMBJ7.5CA-TP extends to 175°C. Selection should align with the application's thermal requirements. The original part specification (-55°C to 150°C) is covered by all alternatives.

Q: Are all substitute parts RoHS3 compliant? A: Yes, all substitute parts listed are ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the original SMBJ7.5C-E3/5B.

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