SMLJ64E3/TR13 Equivalent & Substitute Parts

Part Overview

The SMLJ64E3/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 operates with a 64V reverse standoff voltage and provides 114V maximum clamping voltage at peak pulse current of 26.4A, delivering 300W peak pulse power dissipation. The device is housed in a DO-214AB (SMC) package and is supplied in tape and reel format.

The SMLJ64E3/TR13 maintains active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching voltage ratings, package configuration, and electrical performance characteristics within the 64V protection class.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	64	V
Voltage - Breakdown (Min)	71.1	V
Voltage - Clamping (Max) @ Ipp	114	V
Current - Peak Pulse (10/1000µs)	26.4	A
Power - Peak Pulse	300	W
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-55 to 150	°C (TJ)
Type	Zener	—
Unidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SMLJ64E3/TR13 is determined by the following critical parameters:

Voltage Matching: All substitute parts maintain the same 64V reverse standoff voltage and 71.1V minimum breakdown voltage, ensuring equivalent protection thresholds.

Package Compatibility: All substitutes use the DO-214AB (SMC) surface-mount package, maintaining mechanical and electrical interface compatibility.

Clamping Voltage: Substitute parts are grouped by clamping voltage performance. The SMLJ64E3/TR13 specifies 114V maximum clamping at peak pulse current. Substitutes with 103V clamping voltage represent lower clamping performance, while those with 103V clamping provide tighter voltage regulation.

Peak Pulse Current and Power Dissipation: Substitutes are available across a range of peak pulse current ratings (14.56A to 48.6A) and corresponding power dissipation levels (1500W to 5000W). Selection depends on application transient energy requirements.

Unidirectional Configuration: All parts maintain single-channel unidirectional topology, suitable for single-polarity overvoltage protection.

Compliance and Temperature Range: All substitutes maintain RoHS3 compliance and operate within compatible temperature ranges (-55°C to 150°C or extended to 175°C for certain variants).

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (Max) @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temperature (°C)	Package	Product Status
SMLJ64E3/TR13	Microchip Technology	64	114	26.4	300	-55 to 150	DO-214AB, SMC	Active
5.0SMDJ64A	Taiwan Semiconductor Corporation	64	103	48.6	5000	-55 to 175	DO-214AB, SMC	Active
5.0SMDJ64A-T7	Littelfuse Inc.	64	103	48.6	5000	-65 to 150	DO-214AB, SMC	Active
SMCJ64A	Meritek	64	103	14.56	1500	-55 to 150	DO-214AB, SMC	Active
SMCJ64A-13-F	Diodes Incorporated	64	103	14.6	1500	-55 to 150	DO-214AB, SMC	Active
SMCJ64A-TP	Micro Commercial Co	64	103	14.6	1500	-55 to 175	DO-214AB, SMC	Active
SMDJ64A	Alpha & Omega Semiconductor Inc.	64	103	29.2	3000	-55 to 150	DO-214AB, SMC	Active
SMLJ64A	Bourns Inc.	64	103	29.2	3000	-55 to 150	DO-214AB, SMC	Active

Engineering Selection Recommendations

For Direct Replacement with Equivalent Performance: The SMLJ64A (Bourns Inc.) provides the closest electrical match to the SMLJ64E3/TR13, maintaining identical peak pulse current (29.2A) and power dissipation (3000W) while preserving the SMLJ series designation. Both components are RoHS3 compliant with MSL 1 rating and operate within the -55°C to 150°C temperature range. This part is suitable for applications requiring no performance degradation.

For Higher Energy Transient Protection: The 5.0SMDJ64A (Taiwan Semiconductor Corporation) and 5.0SMDJ64A-T7 (Littelfuse Inc.) offer significantly enhanced peak pulse current (48.6A) and power dissipation (5000W), accommodating higher transient energy events. The 5.0SMDJ64A-T7 extends the lower temperature operating limit to -65°C. Both maintain 64V voltage class compatibility and RoHS3 compliance.

For Moderate Energy Applications: The SMDJ64A (Alpha & Omega Semiconductor Inc.) provides intermediate performance with 29.2A peak pulse current and 3000W power dissipation, matching the SMLJ64A specification while offering alternative sourcing from a different manufacturer.

For Lower Energy Requirements: The SMCJ64A variants (Meritek, Diodes Incorporated SMCJ64A-13-F, and Micro Commercial Co SMCJ64A-TP) deliver reduced peak pulse current (14.56A to 14.6A) and 1500W power dissipation. These parts are appropriate for applications with lower transient energy budgets. The SMCJ64A-TP variant extends the upper temperature limit to 175°C.

Compliance Verification: All substitute parts maintain RoHS3 compliance and REACH unaffected status, matching the regulatory posture of the original SMLJ64E3/TR13. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SMLJ64E3/TR13 with a lower power-rated part such as SMCJ64A?

A: Substitution with lower power-rated parts is permissible only if the application transient energy does not exceed the substitute part's peak pulse power specification. The SMCJ64A is rated for 1500W peak pulse power compared to the SMLJ64E3/TR13 at 300W. Verify that the actual transient energy in your application does not exceed 1500W. The voltage protection class (64V standoff) remains identical.

Q: What is the difference between 103V and 114V clamping voltage?

A: The SMLJ64E3/TR13 specifies a maximum clamping voltage of 114V at peak pulse current, while most substitute parts specify 103V. Lower clamping voltage provides tighter voltage regulation during transient events, reducing overshoot. The 103V clamping variants offer superior voltage suppression performance. Selection depends on whether your protected circuit requires the higher clamping tolerance of 114V or benefits from the tighter 103V regulation.

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

A: Not all substitutes are explicitly specified with tape and reel packaging in the provided data. The SMLJ64E3/TR13, 5.0SMDJ64A-T7, SMCJ64A-13-F, SMCJ64A-TP, and SMLJ64A are confirmed for tape and reel (TR) supply. The 5.0SMDJ64A, SMCJ64A (Meritek), and SMDJ64A do not specify packaging format in the available data. Confirm packaging availability with your supplier before design implementation.

Q: Can I use a part rated for -65°C to 150°C in an application requiring -55°C to 150°C operation?

A: Yes. The 5.0SMDJ64A-T7 (Littelfuse Inc.) is rated for -65°C to 150°C operation, which encompasses the -55°C to 150°C requirement. Extended lower temperature rating provides additional operational margin and is fully compatible with applications specified for -55°C minimum.

Q: What is the significance of the SMLJ versus SMDJ versus SMCJ series designations?

A: These designations indicate different manufacturer product lines within the 64V TVS diode class. SMLJ (Microchip, Bourns) and SMDJ (Alpha & Omega, Taiwan Semiconductor) represent different manufacturer families with varying power dissipation and current ratings. SMCJ (Meritek, Diodes, Micro Commercial) represents another manufacturer family. All maintain compatible DO-214AB package and 64V voltage class specifications. Series designation does not affect electrical substitutability when voltage and package parameters match.

Q: Is the SMLJ64A (Bourns) preferred over other substitutes?

A: The SMLJ64A maintains the SMLJ series designation matching the original SMLJ64E3/TR13, providing design continuity and potential supply chain consistency. However, it is not technically superior to other substitutes with identical electrical specifications. Selection should be based on availability, cost, lead time, and specific application requirements rather than series designation alone.

Q: How do I determine which substitute part is appropriate for my application?

A: Identify the maximum transient energy (in joules or watts) that your circuit must suppress. Match this to the substitute part's peak pulse power rating. Verify that the 64V voltage class and DO-214AB package are compatible with your design. Confirm operating temperature requirements fall within the substitute part's specified range. All listed substitutes maintain RoHS3 compliance and are suitable for general-purpose overvoltage protection applications.

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