SMLJ7.5AE3/TR13 Transient Voltage Suppressor

Part Overview

The SMLJ7.5AE3/TR13 is an active-status Zener-type transient voltage suppressor (TVS) diode manufactured by Microchip Technology. This component operates with a reverse standoff voltage of 7.5V and provides clamping protection at 12.9V maximum, with a peak pulse current rating of 232.6A. The component is packaged in DO-214AB surface mount form factor with tape and reel delivery. Identification of equivalent and substitute parts becomes necessary when original stock becomes limited, when alternative suppliers offer improved lead times, or when design flexibility allows for functionally compatible alternatives that meet the same electrical and mechanical interface requirements.

Substiute Parts

SMLJ7.5AE3/TR13

Microchip TechnologyIn Stock: 1106SMLJ7.5AE3/TR13 Datasheet

Current PartRFQ

SMCJ7.5A

Taiwan Semiconductor CorporationIn Stock: 9312SMCJ7.5A Datasheet

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SMCJ7.5A

Taiwan Semiconductor CorporationIn Stock: 9312SMCJ7.5A Datasheet

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SMCJ7.5A-13-F

Diodes IncorporatedIn Stock: 4060SMCJ7.5A-13-F Datasheet

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SMCJ8.5A-13-F

Diodes IncorporatedIn Stock: 1063SMCJ8.5A-13-F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMLJ7.5AE3/TR13 are classified based on strict electrical and mechanical compatibility criteria. The primary substitution criteria are:

• Voltage - Reverse Standoff: Must match 7.5V (primary protection threshold)
• Voltage - Clamping (Max) @ Ipp: Must match 12.9V (maximum transient voltage)
• Package / Case: Must be DO-214AB or SMC (surface mount compatibility)
• Unidirectional Channels: Must be 1 (single-channel protection)
• Operating Temperature Range: Must encompass -55°C ~ 150°C (TJ)
• Mounting Type: Must be Surface Mount
• Product Status: Must be Active

Parts meeting all these criteria are classified as equivalent substitutes. The SMCJ7.5A and SMCJ7.5A-13-F meet all primary electrical parameters. The SMCJ8.5A-13-F differs in reverse standoff voltage (8.5V vs 7.5V) and clamping voltage (14.4V vs 12.9V), placing it in a different protection class and is not interchangeable for applications requiring 7.5V standoff specification.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Interchangeable):

SMCJ7.5A (Taiwan Semiconductor Corporation) and SMCJ7.5A-13-F (Diodes Incorporated) are functionally equivalent substitutes for the SMLJ7.5AE3/TR13. Both parts maintain identical voltage specifications (7.5V standoff, 12.9V clamping), surface mount package compatibility (DO-214AB/SMC), and full compliance status (ROHS3, EAR99 classification, MSL 1). Both have active product status. The primary difference is peak pulse current rating: the Taiwan Semiconductor part operates at 122A versus the Microchip specification of 232.6A, while the Diodes Incorporated part operates at 116.3A. Both substitute parts provide higher peak pulse power dissipation (1500W) compared to the original specification (300W), delivering superior surge handling capability. These substitutes are suitable for direct PCB replacement in designs where the lower peak current ratings are within system requirements.

Not Equivalent:

SMCJ8.5A-13-F (Diodes Incorporated) is not an interchangeable substitute. While mechanically compatible (DO-214AB/SMC package), this part operates with different voltage specifications: 8.5V reverse standoff and 14.4V clamping voltage. This part class is designed for higher voltage transient protection and cannot be substituted in applications requiring 7.5V standoff protection without altering circuit behavior and potentially compromising system protection characteristics.

Frequently Asked Questions (FAQ)

Q: Can SMCJ7.5A replace SMLJ7.5AE3/TR13 in my design?

A: Yes. Both parts share identical voltage parameters (7.5V standoff, 12.9V clamping), unidirectional Zener configuration, surface mount DO-214AB/SMC packaging, and operating temperature range (-55°C to 150°C). The Taiwan Semiconductor SMCJ7.5A operates at 122A peak pulse current compared to 232.6A in the original specification, but both maintain the same clamping voltage. This substitution is suitable when system surge levels remain within the 122A specification.

Q: What is the difference between SMCJ7.5A and SMCJ7.5A-13-F?

A: Both parts maintain identical voltage specifications (7.5V standoff, 8.33V breakdown minimum, 12.9V clamping maximum) and surface mount packaging (DO-214AB/SMC). SMCJ7.5A is supplied by Taiwan Semiconductor Corporation, while SMCJ7.5A-13-F is supplied by Diodes Incorporated. The Diodes Incorporated variant includes tape and reel packaging designation and operates at 116.3A peak pulse current. Both are functionally equivalent for applications within their current specifications.

Q: Why is SMCJ8.5A-13-F listed but not recommended as a substitute?

A: SMCJ8.5A-13-F operates with 8.5V reverse standoff voltage and 14.4V clamping voltage, differing from the required 7.5V/12.9V specification. While mechanically compatible (same DO-214AB/SMC package), this part is designed for a different voltage protection class. Using this part would alter the transient voltage threshold and may not provide proper protection for circuits designed for 7.5V standoff specification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. SMLJ7.5AE3/TR13, SMCJ7.5A, SMCJ7.5A-13-F, and SMCJ8.5A-13-F are all ROHS3 compliant with moisture sensitivity level 1 (unlimited) and EAR99 export classification. All parts maintain compliance across regulatory requirements.

Q: What is the package designation difference between DO-214AB and SMC?

A: DO-214AB and SMC are equivalent designations for the same surface mount package form factor used by these TVS diodes. Both refer to the same physical package footprint suitable for automated assembly and manual soldering on standard PCB designs.