SMLJ26E3/TR13 Equivalent & Substitute Parts

Part Overview

The SMLJ26E3/TR13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 26V reverse standoff voltage with a 46.6V maximum clamping voltage and 64.4A peak pulse current capability in a DO-214AB (SMC) package. The part is Active status and RoHS3 compliant with unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching electrical characteristics within the 26V voltage class, compatible DO-214AB/SMC packaging, and equivalent or superior power dissipation ratings. Substitutes maintain the same reverse standoff voltage, breakdown voltage range, and unidirectional channel configuration while accommodating variations in clamping voltage and peak pulse current specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	26	V
Voltage - Breakdown (Min)	28.9	V
Voltage - Clamping (Max) @ Ipp	46.6	V
Current - Peak Pulse (10/1000µs)	64.4	A
Power - Peak Pulse	300	W
Type	Zener	-
Unidirectional Channels	1	-
Package / Case	DO-214AB, SMC	-
Operating Temperature	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution logic for the SMLJ26E3/TR13 is based on the following critical parameters:

Voltage Matching Criteria:

Reverse standoff voltage must equal 26V (Typ)
Breakdown voltage minimum must equal 28.9V
Clamping voltage and peak pulse current may vary within acceptable operating ranges for the application

Package Compatibility:

All substitutes must use DO-214AB or SMC package designation
Surface-mount configuration required
Unidirectional channel configuration (1 channel) mandatory

Electrical Performance Tolerance:

Clamping voltage range: 42.1V to 53.5V acceptable (variation reflects different manufacturer designs)
Peak pulse current range: 35.6A to 187A acceptable (higher values provide enhanced transient protection margin)
Power dissipation range: 1500W to 5000W acceptable (higher ratings provide design margin)

Compliance Requirements:

RoHS3 compliance required
Active product status required
Operating temperature range: minimum -55°C to 150°C required

All identified substitutes meet these criteria and are classified as direct electrical equivalents within the 26V TVS diode category.

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	Status
SMLJ26E3/TR13	Microchip Technology	26	28.9	46.6	64.4	300	-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	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
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

Primary Selection Criteria:

All substitute parts listed maintain Active product status and RoHS3 compliance, meeting baseline regulatory and availability requirements. Selection among substitutes depends on specific application constraints:

For Minimum Clamping Voltage Applications: SMCJ26A (MDD), SMCJ26A-13-F (Diodes Incorporated), and SMDJ26A (Alpha & Omega) provide 42.1V clamping voltage, representing a 4.5V reduction from the main part specification. These are suitable for applications where lower clamping voltage is beneficial.

For Enhanced Transient Protection: 5.0SMDJ26A (Taiwan Semiconductor Corporation) offers 5000W peak pulse power with 119A peak current, providing maximum design margin. SMCJ26A-TR (STMicroelectronics) delivers 187A peak pulse current at 53.5V clamping voltage, suitable for high-energy transient environments.

For Balanced Performance: SMLJ26A (Bourns Inc.) and SMDJ26A (Alpha & Omega) both provide 3000W power rating with 71.2A and 71.3A peak pulse current respectively, offering intermediate performance between the main part and maximum-rated alternatives.

Temperature Range Consideration: 5.0SMDJ26A supports extended operating temperature to 175°C, compared to 150°C for most alternatives. SMCJ26A (MDD) operates to -50°C minimum, compared to -55°C for other options.

Compliance Status: SMLJ26A (Bourns Inc.) carries REACH Affected status, while all other parts including the main part are REACH Unaffected. This distinction may impact supply chain requirements in specific regulatory jurisdictions.

Frequently Asked Questions (FAQ)

Q: Can SMCJ26A-TR substitute for SMLJ26E3/TR13 in high-transient applications?

A: Yes. SMCJ26A-TR maintains identical reverse standoff (26V) and breakdown voltage (28.9V) specifications. The higher clamping voltage (53.5V vs. 46.6V) and peak pulse current (187A vs. 64.4A) provide enhanced transient suppression capability. Both parts use DO-214AB/SMC packaging and operate within -55°C to 150°C range.

Q: What is the difference between 5.0SMDJ26A and SMLJ26E3/TR13?

A: Both maintain 26V reverse standoff and 28.9V breakdown voltage. Key differences: 5.0SMDJ26A provides 5000W peak pulse power versus 300W, operates to 175°C versus 150°C, and delivers 119A peak pulse current versus 64.4A. Clamping voltage is lower at 42.1V versus 46.6V. The higher power rating makes 5.0SMDJ26A suitable for applications requiring greater transient energy absorption.

Q: Are all substitute parts available in tape and reel packaging?

A: Packaging information varies by supplier. SMLJ26E3/TR13, SMCJ26A-13-F, SMDJ26A, and SMLJ26A are specified with tape and reel (TR) or cut tape (CT) packaging. SMCJ26A (MDD) and SMCJ26A-TR (STMicroelectronics) packaging designations do not explicitly specify tape and reel format in the provided data. Confirm packaging availability with supplier before procurement.

Q: Which substitute offers the lowest clamping voltage?

A: SMCJ26A (MDD), SMCJ26A-13-F (Diodes Incorporated), SMDJ26A (Alpha & Omega), and SMLJ26A (Bourns) all provide 42.1V maximum clamping voltage, representing the lowest among all options. This is 4.5V lower than the main part's 46.6V specification.

Q: Is SMLJ26A suitable as a direct replacement?

A: Yes. SMLJ26A (Bourns Inc.) is a direct electrical equivalent with matching 26V reverse standoff and 28.9V breakdown voltage. It provides 3000W power rating (versus 300W) and 71.2A peak pulse current (versus 64.4A), both representing performance enhancements. Operating temperature range (-55°C to 150°C) and DO-214AB/SMC packaging are identical. REACH Affected status is the only compliance distinction.

Q: What is the peak pulse current specification difference between substitutes?

A: Peak pulse current ranges from 35.6A (SMCJ26A-13-F) to 187A (SMCJ26A-TR). The main part specifies 64.4A. Lower current ratings (35.6A to 35.7A) are suitable for lower-energy transient environments. Higher ratings (71.2A to 187A) provide enhanced protection margin for high-energy transient suppression applications.

Q: Can SMCJ26A (MDD) be used where SMLJ26E3/TR13 is specified?

A: Electrical compatibility exists: both maintain 26V reverse standoff and 28.9V breakdown voltage in DO-214AB/SMC packaging. SMCJ26A provides lower clamping voltage (42.1V vs. 46.6V) and lower peak pulse current (35.7A vs. 64.4A). Operating temperature minimum is -50°C versus -55°C. Substitution is valid for applications not requiring the main part's full transient current capacity or extended low-temperature operation.

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