SMLJ22CE3/TR13 Transient Voltage Suppressor (TVS) Diode

Part Overview

The SMLJ22CE3/TR13 is a surface-mount transient voltage suppressor diode manufactured by Microchip Technology. This bidirectional zener-type TVS diode is designed for general-purpose overvoltage protection in electronic circuits. The component operates with a 22V reverse standoff voltage and provides clamping at 39.4V with a peak pulse current capability of 76.2A. The part maintains active product status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1), making it suitable for production applications where component sourcing flexibility may be required due to inventory availability or supply chain considerations.

Substiute Parts

SMLJ22CE3/TR13

Microchip TechnologyIn Stock: 858SMLJ22CE3/TR13 Datasheet

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5.0SMDJ22CA

MDE Semiconductor IncIn Stock: 272155.0SMDJ22CA Datasheet

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SMC3K22CAHM3/57

Vishay General Semiconductor - Diodes DivisionIn Stock: 2575SMC3K22CAHM3/57 Datasheet

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SMCJ22CA

MeritekIn Stock: 56161SMCJ22CA Datasheet

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SMCJ22CA

MeritekIn Stock: 56161SMCJ22CA Datasheet

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SMCJ22CA

MeritekIn Stock: 56161SMCJ22CA Datasheet

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SMCJ22CA-13-F

Diodes IncorporatedIn Stock: 7359SMCJ22CA-13-F Datasheet

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SMDJ22CA

Alpha & Omega Semiconductor Inc.In Stock: 3166SMDJ22CA Datasheet

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SMLJ22CA

Bourns Inc.In Stock: 9844SMLJ22CA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMLJ22CE3/TR13 are qualified based on the following electrical and mechanical parameters:

• Voltage Rating: Reverse standoff voltage of 22V ±tolerance with breakdown minimum of 24.4V
• Package Compatibility: DO-214AB surface-mount package (SMC designation)
• Operating Temperature: -55°C to 150°C junction temperature range
• Bidirectional Channels: Single-channel configuration
• Compliance: RoHS3 compliance and MSL 1 rating

The substitute parts listed maintain electrical compatibility through matching voltage ratings and temperature operating ranges. All substitutes are housed in the same DO-214AB package footprint, ensuring mechanical interchangeability on printed circuit boards. Variations in clamping voltage (35.5V vs. 39.4V) and peak pulse current ratings are within the acceptable range for general-purpose TVS applications where the 22V nominal protection level is the primary design requirement.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and RoHS3 compliance, meeting regulatory requirements for production use. The SMC3K22CAHM3/57 from Vishay carries AEC-Q101 automotive qualification, providing enhanced reliability certification for applications requiring automotive-grade components. This part is suitable for selection in automotive or mission-critical applications where additional qualification documentation is specified.

For general-purpose applications where higher peak pulse current capacity is beneficial, the 5.0SMDJ22CA from MDE Semiconductor offers 141A peak pulse current and 5000W peak pulse power, providing additional margin above the SMLJ22CE3/TR13 baseline of 76.2A and 300W. The SMDJ22CA and SMLJ22CA variants from Alpha & Omega and Bourns respectively provide 3000W peak pulse power with comparable peak pulse currents (84.6A and 84.4A), offering a balance between performance and availability.

Parts with lower power ratings (SMCJ22CA variants at 1500W and 42.2A–42.25A) are electrically compatible for applications where peak pulse power requirements do not exceed 1500W. Selection should be based on the specific transient energy profile of the protected circuit.

Frequently Asked Questions (FAQ)

Q: Can the SMLJ22CE3/TR13 be directly replaced with any of the listed substitutes? A: Yes, all listed parts share the same 22V reverse standoff voltage, 24.4V minimum breakdown voltage, and DO-214AB package footprint. Direct PCB-level substitution is supported. However, application-specific transient energy profiles should be evaluated against each part's clamping voltage and peak pulse ratings.

Q: What is the difference between clamping voltage specifications of 39.4V (SMLJ22CE3/TR13) and 35.5V (other substitutes)? A: Clamping voltage represents the maximum voltage across the TVS diode when conducting peak pulse current. The SMLJ22CE3/TR13 clamps at 39.4V, while substitute parts clamp at 35.5V. Both values provide effective overvoltage protection at the 22V protection level. Selection depends on whether the protected circuit can tolerate the higher clamping voltage of the Microchip part or benefits from the lower clamping voltage of substitute parts.

Q: Are all substitute parts RoHS3 compliant? A: Yes, all listed substitute parts carry RoHS3 compliance. The SMLJ22CA from Bourns indicates REACH Affected status, while other parts show REACH Unaffected status. This distinction is relevant only for applications with specific chemical substance tracking requirements.

Q: What is the significance of the DO-214AB / SMC package designation? A: DO-214AB is the standardized package outline designation; SMC is the commercial descriptor for the same physical package. Both terms refer to an identical surface-mount component footprint with two leads in a rectangular ceramic body approximately 3.8mm × 2.0mm × 1.3mm. All listed substitutes use this package, ensuring mechanical interchangeability without PCB redesign.

Q: Can I substitute a lower-power-rated part (1500W) with the SMLJ22CE3/TR13 (300W)? A: The SMLJ22CE3/TR13 and all listed substitutes are oversized relative to each other in terms of power dissipation capacity. Lower-power-rated substitutes (SMCJ22CA at 1500W) provide more than five times the peak pulse power of the SMLJ22CE3/TR13. Selection should be based on the application's maximum transient energy specification, not merely on choosing the highest-rated component.

Q: Which substitute offers the best performance profile for general-purpose protection? A: The SMDJ22CA (Alpha & Omega) and SMLJ22CA (Bourns) both provide 3000W peak pulse power with 84.6A and 84.4A peak pulse currents, offering performance between the baseline SMLJ22CE3/TR13 and the high-capacity 5.0SMDJ22CA. Both maintain standard inventory availability and full compliance certification.