SMCJ7.5A-M3/9AT Equivalent & Substitute Parts

Part Overview

The SMCJ7.5A-M3/9AT is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 7.5V reverse standoff voltage class and provides transient protection for general-purpose applications. The part is actively produced and RoHS3 compliant. Equivalent and substitute parts are identified based on matching electrical characteristics and mechanical compatibility within the DO-214AB (SMC) package family.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	7.5	V
Voltage - Breakdown (Min)	8.33	V
Voltage - Clamping (Max) @ Ipp	12.9	V
Current - Peak Pulse (10/1000µs)	116.3	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AB, SMC	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution for the SMCJ7.5A-M3/9AT is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 7.5V
Voltage - Clamping (Max) @ Ipp: 12.9V
Current - Peak Pulse (10/1000µs): 116.3A minimum
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C
RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories:

Direct Equivalents maintain identical electrical specifications and package compatibility. These parts are interchangeable without circuit redesign.

Manufacturer-Recommended Alternatives differ in voltage class or peak pulse current but remain within the same product family and package type. These require circuit evaluation before substitution.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Package	RoHS Status	Product Status
SMCJ7.5A-M3/9AT	Vishay General Semiconductor	7.5	12.9	116.3	1500	DO-214AB, SMC	ROHS3 Compliant	Active
SMCJ7.5A-E3/57T	Vishay General Semiconductor	7.5	12.9	116.3	1500	DO-214AB, SMC	ROHS3 Compliant	Active
SMCJ7.5A	Taiwan Semiconductor Corporation	7.5	12.9	122	1500	DO-214AB, SMC	ROHS3 Compliant	Active
SMCJ7.5A-13-F	Diodes Incorporated	7.5	12.9	116.3	1500	DO-214AB, SMC	ROHS3 Compliant	Active
SMCJ8.5A-13-F	Diodes Incorporated	8.5	14.4	104.2	1500	DO-214AB, SMC	ROHS3 Compliant	Active

Engineering Selection Recommendations

Direct Substitutes (Electrically and Mechanically Identical):

SMCJ7.5A-E3/57T, SMCJ7.5A-13-F, and SMCJ7.5A from Taiwan Semiconductor Corporation are direct equivalents to the SMCJ7.5A-M3/9AT. All maintain the 7.5V reverse standoff voltage, 12.9V clamping voltage, and 1500W peak pulse power rating. These parts are actively produced, RoHS3 compliant, and packaged in DO-214AB (SMC) surface mount format. Selection among these equivalents may be based on packaging availability (Tape & Reel versus bulk) and supplier inventory levels.

Manufacturer-Recommended Alternative:

The SMCJ8.5A-13-F represents a higher voltage class option with an 8.5V reverse standoff and 14.4V clamping voltage. This part is suitable only for applications requiring higher voltage protection thresholds. The peak pulse current is reduced to 104.2A. This part is actively produced and RoHS3 compliant but requires circuit validation before substitution.

All listed parts maintain the -55°C to 150°C operating temperature range and are RoHS3 compliant, meeting standard environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can SMCJ7.5A-E3/57T be used as a direct replacement for SMCJ7.5A-M3/9AT?

A: Yes. Both parts share identical electrical specifications (7.5V reverse standoff, 12.9V clamping voltage, 116.3A peak pulse current) and are packaged in DO-214AB (SMC) surface mount format. The difference is packaging configuration (Tape & Reel versus bulk).

Q: What is the difference between SMCJ7.5A from Taiwan Semiconductor Corporation and the Vishay part?

A: The Taiwan Semiconductor SMCJ7.5A maintains the same voltage ratings and package type but specifies a slightly higher peak pulse current of 122A compared to 116.3A. This represents improved performance within the same electrical class and is a direct substitute.

Q: Can SMCJ8.5A-13-F replace SMCJ7.5A-M3/9AT in any application?

A: SMCJ8.5A-13-F operates at a higher voltage class (8.5V reverse standoff, 14.4V clamping) and lower peak pulse current (104.2A). This part is suitable only for circuits designed for 8.5V protection thresholds. Direct substitution without circuit redesign is not recommended.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and meet the same environmental and regulatory standards as the SMCJ7.5A-M3/9AT.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) and bulk packaging formats do not affect electrical performance. Selection is based on assembly process requirements and inventory management.

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