SMCJ26A-M3/9AT Equivalent & Substitute Parts

Part Overview

The SMCJ26A-M3/9AT is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 26V reverse standoff voltage class and is designed for general-purpose transient protection applications. The part is Active status and widely available in inventory (820 pcs). Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when different performance characteristics better suit specific circuit requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	26	V
Voltage - Breakdown (Min)	28.9	V
Voltage - Clamping (Max) @ Ipp	42.1	V
Current - Peak Pulse (10/1000µs)	35.6	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	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the SMCJ26A-M3/9AT are classified based on strict electrical and mechanical parameter matching:

Direct Electrical Equivalents (Identical Performance Parameters): Parts that maintain the same voltage ratings (26V reverse standoff, 28.9V breakdown minimum, 42.1V clamping maximum), current handling (35.6A peak pulse), and power dissipation (1500W peak pulse) are considered direct equivalents. These parts differ only in manufacturer, packaging format, or tape/reel configuration.

Key Substitution Parameters:

Voltage - Reverse Standoff: 26V (fixed)
Voltage - Breakdown (Min): 28.9V (fixed)
Voltage - Clamping (Max) @ Ipp: 42.1V (fixed)
Current - Peak Pulse (10/1000µs): 35.6A (±0.1A tolerance acceptable)
Power - Peak Pulse: 1500W (fixed)
Package / Case: DO-214AB, SMC (required)
Mounting Type: Surface Mount (required)

Higher Performance Alternatives: Parts with identical voltage characteristics but higher current handling or power dissipation ratings can substitute in applications where the original part's specifications are met or exceeded. These provide additional design margin.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Package	Status
SMCJ26A-M3/9AT	Vishay	26	28.9	42.1	35.6	1500	-55 to 150	DO-214AB, SMC	Active
SMCJ26A-E3/57T	Vishay	26	28.9	42.1	35.6	1500	-55 to 150	DO-214AB, SMC	Active
SMCJ26A-E3/9AT	Vishay	26	28.9	42.1	35.6	1500	-55 to 150	DO-214AB, SMC	Active
SMCJ26A	MDD	26	28.9	42.1	35.7	1500	-50 to 150	DO-214AB, SMC	Active
SMCJ26A-13-F	Diodes Incorporated	26	28.9	42.1	35.6	1500	-55 to 150	DO-214AB, SMC	Active
5.0SMDJ26A	Taiwan Semiconductor Corporation	26	28.9	42.1	119	5000	-55 to 175	DO-214AB, SMC	Active
SMCJ26A-TR	STMicroelectronics	26	28.9	53.5	187	1500	-55 to 150	DO-214AB, SMC	Active
SMDJ26A	Alpha & Omega Semiconductor Inc.	26	28.9	42.1	71.3	3000	-55 to 150	DO-214AB, SMC	Active
SMLJ26A	Bourns Inc.	26	28.9	42.1	71.2	3000	-55 to 150	DO-214AB, SMC	Active

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical Performance): SMCJ26A-E3/57T, SMCJ26A-E3/9AT, SMCJ26A-13-F, and SMCJ26A (MDD) are direct electrical equivalents with identical voltage and current specifications. Selection among these depends on packaging format availability and supply chain requirements. All are Active status with ROHS3 compliance and MSL 1 rating.

Higher Performance Alternatives: SMDJ26A (Alpha & Omega) and SMLJ26A (Bourns) provide 3000W peak pulse power with 71A+ current handling while maintaining identical voltage characteristics. These are suitable for applications requiring additional transient energy absorption margin.

5.0SMDJ26A (Taiwan Semiconductor Corporation) offers the highest performance with 5000W peak pulse power and 119A current handling, plus extended operating temperature to 175°C. This part is appropriate for high-energy transient environments or elevated temperature applications.

SMCJ26A-TR (STMicroelectronics) exhibits higher clamping voltage (53.5V) and current (187A), making it suitable only when higher clamping voltage is acceptable in the circuit design.

All substitute parts maintain ROHS3 compliance, EAR99 export classification, and HTSUS code 8541.10.0080 consistency with the primary part.

Frequently Asked Questions (FAQ)

Q: Can SMCJ26A-E3/57T replace SMCJ26A-M3/9AT directly? A: Yes. Both parts share identical electrical specifications (26V standoff, 28.9V breakdown, 42.1V clamping, 35.6A peak pulse, 1500W power). The difference is packaging format (tape reel configuration). Direct PCB-level substitution is valid.

Q: What is the difference between SMCJ26A-M3/9AT and SMDJ26A? A: SMDJ26A maintains identical voltage ratings and clamping characteristics but provides double the power dissipation (3000W vs 1500W) and double the peak pulse current (71.3A vs 35.6A). SMDJ26A is a higher-performance alternative suitable for circuits requiring greater transient energy absorption.

Q: Is SMCJ26A-TR a direct equivalent? A: No. While SMCJ26A-TR maintains the 26V reverse standoff voltage, it exhibits significantly higher clamping voltage (53.5V vs 42.1V) and peak pulse current (187A vs 35.6A). This part is not a direct substitute and should only be used if the circuit design accommodates higher clamping voltage.

Q: Can I use 5.0SMDJ26A in place of SMCJ26A-M3/9AT? A: 5.0SMDJ26A maintains identical voltage specifications but provides substantially higher performance (5000W power, 119A current, -55 to 175°C operating range). It is electrically compatible and provides additional design margin. Use is appropriate when higher performance is beneficial or required.

Q: What is the significance of the packaging suffix (M3/9AT vs E3/57T)? A: These suffixes denote different tape and reel configurations for automated assembly. M3/9AT and E3/57T are both standard surface mount packaging formats. Selection depends on assembly equipment compatibility and supply availability. Electrical performance is identical.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance status, consistent with the primary SMCJ26A-M3/9AT part. All are suitable for applications requiring RoHS certification.

Q: What is the operating temperature difference between SMCJ26A (MDD) and SMCJ26A-M3/9AT? A: SMCJ26A (MDD) operates from -50°C to 150°C, while SMCJ26A-M3/9AT operates from -55°C to 150°C. The MDD variant has a 5°C higher minimum operating temperature. This difference is significant only in applications requiring operation below -50°C.

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