SMCJ26A-TP Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The SMCJ26A-TP is an active-status unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co in DO-214AB (SMC) surface mount package. This component provides transient overvoltage protection for general-purpose applications with a 26V reverse standoff voltage and 42.1V maximum clamping voltage at peak pulse current of 35.7A. Equivalent and substitute parts are identified based on matching or exceeding electrical performance within the same package family while maintaining compliance certifications and operational temperature ranges suitable for the application environment.

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)	35.7	A
Power - Peak Pulse	1500	W
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-55 to 175	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for SMCJ26A-TP are classified into two categories based on electrical parameter alignment:

Direct Equivalents maintain identical voltage ratings (26V reverse standoff, 28.9V breakdown minimum, 42.1V clamping maximum) and current handling (35.7A peak pulse) within the same 1500W power dissipation class. These parts are interchangeable when operating temperature range and packaging format match the application requirements.

Higher-Performance Alternatives exceed the peak pulse current and power dissipation specifications while maintaining the same voltage protection thresholds. These parts provide enhanced transient energy absorption capability and are suitable for applications requiring greater margin or higher transient stress levels.

Substitution eligibility is determined by:

Voltage - Reverse Standoff: 26V (fixed requirement)
Voltage - Breakdown (Min): 28.9V (fixed requirement)
Voltage - Clamping (Max) @ Ipp: 42.1V (fixed requirement)
Current - Peak Pulse: ≥35.7A (equal or greater)
Power - Peak Pulse: ≥1500W (equal or greater)
Package / Case: DO-214AB, SMC (fixed requirement)
Mounting Type: Surface Mount (fixed requirement)
RoHS Status: ROHS3 Compliant (compliance requirement)

Parameter Comparison

Manufacturer 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 Temperature (°C)	RoHS Status
SMCJ26A-TP	Micro Commercial Co	26	28.9	42.1	35.7	1500	-55 to 175	ROHS3 Compliant
SMCJ26A	MDD	26	28.9	42.1	35.7	1500	-50 to 150	ROHS3 Compliant
SMCJ26A-13-F	Diodes Incorporated	26	28.9	42.1	35.6	1500	-55 to 150	ROHS3 Compliant
SMCJ26A-TR	STMicroelectronics	26	28.9	54.6	187	1500	-55 to 150	ROHS3 Compliant
SMLJ26A	Bourns Inc.	26	28.9	42.1	71.2	3000	-55 to 150	ROHS3 Compliant
SMDJ26A	Alpha & Omega Semiconductor Inc.	26	28.9	42.1	71.3	3000	-55 to 150	ROHS3 Compliant
5.0SMDJ26A	Taiwan Semiconductor Corporation	26	28.9	42.1	119	5000	-55 to 175	ROHS3 Compliant
5.0SMDJ26A-T7	Littelfuse Inc.	26	28.9	42.1	119	5000	-65 to 150	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitution (Equivalent Performance): SMCJ26A-13-F (Diodes Incorporated) provides direct electrical equivalence with peak pulse current of 35.6A, matching the original specification within measurement tolerance. Operating temperature range of -55°C to 150°C covers most industrial applications. ROHS3 compliance and MSL 1 rating confirm suitability for standard manufacturing processes.

SMCJ26A (MDD) maintains identical electrical parameters with 35.7A peak pulse current. Operating temperature range of -50°C to 150°C is suitable for applications not requiring the full -55°C lower limit. ROHS3 compliance and unlimited MSL rating support high-volume production environments.

Higher-Performance Substitution (Enhanced Capability): SMLJ26A (Bourns Inc.) and SMDJ26A (Alpha & Omega Semiconductor Inc.) double the peak pulse current to 71.2–71.3A and increase power dissipation to 3000W while maintaining identical voltage protection thresholds. These parts are suitable for applications experiencing higher transient stress or requiring additional design margin.

5.0SMDJ26A (Taiwan Semiconductor Corporation) and 5.0SMDJ26A-T7 (Littelfuse Inc.) provide the highest performance tier with 119A peak pulse current and 5000W power dissipation. These parts accommodate severe transient environments and support extended temperature ranges (-65°C to 175°C depending on manufacturer).

Compliance Verification: All substitute parts maintain ROHS3 compliance and EAR99 export classification matching the original component. Moisture sensitivity level 1 (unlimited) is standard across all options, ensuring compatibility with standard PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SMCJ26A-TP be replaced with SMCJ26A from MDD? A: Yes, SMCJ26A from MDD is electrically equivalent with matching 26V standoff voltage, 28.9V breakdown minimum, and 42.1V clamping voltage. Peak pulse current of 35.7A and 1500W power dissipation are identical. Operating temperature range differs (-50°C to 150°C versus -55°C to 175°C); verify application temperature requirements before substitution.

Q: What is the difference between SMCJ26A-TP and SMLJ26A? A: Both maintain identical voltage protection parameters (26V standoff, 28.9V breakdown, 42.1V clamping). SMLJ26A provides higher current handling (71.2A versus 35.7A) and doubled power dissipation (3000W versus 1500W). SMLJ26A is suitable for applications requiring greater transient energy absorption or operating margin.

Q: Are 5.0SMDJ26A and 5.0SMDJ26A-T7 interchangeable with SMCJ26A-TP? A: Both 5.0SMDJ series parts maintain the same voltage protection thresholds (26V standoff, 28.9V breakdown, 42.1V clamping) but provide significantly higher current capacity (119A) and power dissipation (5000W). They are suitable substitutes for applications requiring enhanced transient protection. Operating temperature ranges differ; 5.0SMDJ26A-T7 supports -65°C to 150°C while 5.0SMDJ26A supports -55°C to 175°C.

Q: Does SMCJ26A-TR from STMicroelectronics match SMCJ26A-TP specifications? A: SMCJ26A-TR maintains the same 26V standoff and 28.9V breakdown voltages. Clamping voltage is higher at 54.6V with significantly increased peak pulse current (187A). This part provides enhanced protection capability and is suitable for applications requiring higher transient stress tolerance. Verify circuit design compatibility with the higher clamping voltage before substitution.

Q: What packaging formats are available for these substitute parts? A: All substitute parts use DO-214AB (SMC) surface mount package, maintaining identical PCB footprint and reflow soldering compatibility with SMCJ26A-TP. Packaging options vary by manufacturer (Tape & Reel, Cut Tape, or standard reel formats) but do not affect electrical performance or mechanical fit.

Q: Are all substitute parts ROHS3 compliant? A: Yes, all listed substitute parts maintain ROHS3 compliance matching the original SMCJ26A-TP specification. All parts are classified as EAR99 for export purposes and carry MSL 1 (unlimited) moisture sensitivity ratings, confirming compatibility with standard manufacturing and assembly processes.

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