SMCJ75A-M3/9AT Equivalent & Substitute Parts

Part Overview

The SMCJ75A-M3/9AT is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 75V reverse standoff category with a 121V maximum clamping voltage and 12.4A peak pulse current rating. The device is designed for general-purpose transient voltage suppression applications and is currently in active production status with ROHS3 compliance. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the DO-214AB (SMC) package family.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	75	V
Voltage - Breakdown (Min)	83.3	V
Voltage - Clamping (Max) @ Ipp	121	V
Current - Peak Pulse (10/1000µs)	12.4	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

Substitute parts for the SMCJ75A-M3/9AT are classified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Core Matching Parameters:

Voltage - Reverse Standoff (Typ): 75V
Voltage - Breakdown (Min): 83.3V
Voltage - Clamping (Max) @ Ipp: 121V
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Unidirectional Channels: 1
Type: Zener
RoHS Status: ROHS3 Compliant

Direct Equivalents maintain identical electrical specifications and packaging. These parts are interchangeable without circuit modification.

Higher Power Rated Alternatives share the same voltage parameters and package but feature increased peak pulse current and power dissipation ratings. These provide enhanced transient suppression capability within the same form factor.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Package	RoHS Status
SMCJ75A-M3/9AT	Vishay	75	83.3	121	12.4	1500	-55 to 150	DO-214AB, SMC	ROHS3
SMCJ75A-E3/57T	Vishay	75	83.3	121	12.4	1500	-55 to 150	DO-214AB, SMC	ROHS3
SMCJ75A	Meritek	75	83.3	121	12.4	1500	-55 to 150	DO-214AB, SMC	ROHS3
SMCJ75A-13-F	Diodes Incorporated	75	83.3	121	12.4	1500	-55 to 150	DO-214AB, SMC	ROHS3
5.0SMDJ75A	Taiwan Semiconductor Corporation	75	83.3	121	41.4	5000	-55 to 175	DO-214AB, SMC	ROHS3
SMDJ75A	Alpha & Omega Semiconductor Inc.	75	83.3	121	24.8	3000	-55 to 150	DO-214AB, SMC	ROHS3
SMLJ75A	Bourns Inc.	75	83.3	121	24.8	3000	-55 to 150	DO-214AB, SMC	ROHS3

Engineering Selection Recommendations

Direct Equivalents (Identical Specifications): SMCJ75A-E3/57T, SMCJ75A (Meritek), and SMCJ75A-13-F are direct functional equivalents to SMCJ75A-M3/9AT. All maintain 12.4A peak pulse current, 1500W peak pulse power, and identical voltage parameters. Selection among these parts is determined by packaging availability (Tape & Reel vs. Cut Tape) and inventory status. All are ROHS3 compliant and suitable for direct substitution.

Higher Power Rated Alternatives: SMDJ75A and SMLJ75A provide 3000W peak pulse power with 24.8A peak pulse current while maintaining identical voltage specifications and DO-214AB packaging. These are suitable for applications requiring enhanced transient suppression margin within the same footprint.

5.0SMDJ75A offers maximum power dissipation at 5000W with 41.4A peak pulse current and extended operating temperature range to 175°C. This part is appropriate for high-stress transient environments while maintaining voltage compatibility.

All substitute parts maintain ROHS3 compliance and unidirectional Zener diode topology, ensuring regulatory and functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can SMCJ75A-E3/57T be used as a direct replacement for SMCJ75A-M3/9AT? A: Yes. Both parts share identical electrical specifications (75V reverse standoff, 121V clamping, 12.4A peak pulse current, 1500W power rating) and DO-214AB SMC packaging. The difference is packaging format: SMCJ75A-E3/57T is supplied in Tape & Reel format while SMCJ75A-M3/9AT uses the M3/9AT reel specification. Electrical performance is equivalent.

Q: What is the difference between SMCJ75A and SMDJ75A? A: Both maintain identical voltage parameters (75V reverse standoff, 121V clamping). The primary difference is peak pulse current and power rating: SMCJ75A is rated at 12.4A / 1500W, while SMDJ75A is rated at 24.8A / 3000W. SMDJ75A provides higher transient suppression capability in the same package.

Q: Can higher power rated parts like SMDJ75A or SMLJ75A be substituted for SMCJ75A-M3/9AT? A: Yes, with consideration for application requirements. Higher power rated parts (SMDJ75A, SMLJ75A at 3000W, and 5.0SMDJ75A at 5000W) maintain identical voltage specifications and DO-214AB packaging. These are suitable substitutes when enhanced transient suppression capability is beneficial or required. No circuit modification is necessary.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, ensuring regulatory compatibility with SMCJ75A-M3/9AT in applications requiring RoHS certification.

Q: What is the significance of the packaging designation (M3/9AT vs. E3/57T)? A: These designations specify reel configuration and tape format for automated assembly. M3/9AT and E3/57T represent different supplier reel specifications but do not affect electrical performance or component functionality. Selection is based on assembly equipment compatibility and inventory availability.

Q: Can SMCJ75A-M3/9AT be used in applications requiring -55°C to 175°C operating range? A: The SMCJ75A-M3/9AT is rated for -55°C to 150°C. For applications requiring extended temperature range to 175°C, 5.0SMDJ75A is the appropriate substitute, as it maintains identical voltage specifications with extended temperature capability.

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