SMLJ22E3/TR13

Part Overview

The SMLJ22E3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, classified as a unidirectional Zener device in the DO-214AB surface mount package. This component is designed for general-purpose transient voltage protection applications and carries Active product status. Identifying suitable substitute components becomes necessary when addressing supply chain constraints, inventory availability, or specific performance requirements that may be better met by alternative manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

SMLJ22E3/TR13

Microchip TechnologyIn Stock: 773SMLJ22E3/TR13 Datasheet

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5.0SMDJ22A

Taiwan Semiconductor CorporationIn Stock: 92885.0SMDJ22A Datasheet

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SMCJ22A

Fairchild SemiconductorIn Stock: 21173SMCJ22A Datasheet

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SMCJ22A

Fairchild SemiconductorIn Stock: 21173SMCJ22A Datasheet

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SMCJ22A-13-F

Diodes IncorporatedIn Stock: 6982SMCJ22A-13-F Datasheet

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SMCJ22A-TR

STMicroelectronicsIn Stock: 7691SMCJ22A-TR Datasheet

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SMDJ22A

Alpha & Omega Semiconductor Inc.In Stock: 28173SMDJ22A Datasheet

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SMLJ22A

Bourns Inc.In Stock: 24607SMLJ22A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute components for the SMLJ22E3/TR13 are classified based on strict adherence to the following electrical and mechanical parameters:

Primary Compatibility Criteria:

• Voltage - Reverse Standoff: 22V (all substitutes maintain this specification)
• Voltage - Breakdown (Min): 24.4V (all substitutes maintain this specification)
• Package/Case: DO-214AB, SMC (all substitutes use identical surface mount package)
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener

Secondary Parameters Subject to Variation: Substitute parts are permitted to differ in voltage clamping characteristics (35.5V to 48.3V), peak pulse current (42.2A to 207A), and peak pulse power (1500W to 5000W), provided they accommodate the same reverse standoff voltage and package form factor. These variations enable designers to select components with performance characteristics better aligned with specific protection requirements while maintaining the same footprint and basic voltage regulation function.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and are ROHS3 compliant, meeting current regulatory requirements for electronics manufacturing. Selection between the primary part (SMLJ22E3/TR13) and substitute options should be based on the following considerations:

Higher Dissipation Requirement Applications: The 5.0SMDJ22A (5000W peak pulse power) is suitable for applications requiring enhanced transient energy absorption capacity. This component also offers an extended operating temperature range to 175°C.

Standard Dissipation Applications: The SMDJ22A (3000W) and SMLJ22A (3000W) provide mid-range power handling capability, with the SMDJ22A offering slightly higher peak pulse current (84.6A).

Lower Power Applications: The SMCJ22A series (1500W) and SMCJ22A-13-F (1500W, Diodes Incorporated) serve applications with lower transient energy requirements.

High Current Peak Pulse Applications: The SMCJ22A-TR (STMicroelectronics) delivers the highest peak pulse current (207A) with 8/20µs pulse waveform specification, suitable for applications with severe current spike conditions.

All substitutes share the identical 22V reverse standoff voltage and 24.4V minimum breakdown voltage, ensuring functional compatibility in circuits designed around these parameters. Package and footprint compatibility is maintained across all listed alternatives.

Frequently Asked Questions (FAQ)

Q: What are the minimum electrical requirements for a substitute part? A: Any substitute must maintain a 22V reverse standoff voltage and 24.4V minimum breakdown voltage. These are the core voltage parameters that define circuit protection function. Package type must remain DO-214AB (SMC) for mechanical compatibility.

Q: Why do substitute parts show different clamping voltages (35.5V to 48.3V)? A: Clamping voltage variation is permitted within substitute specifications because the primary design constraint is established by the 22V standoff voltage. Higher clamping voltages indicate different transient response characteristics that may be advantageous in specific applications. The original part's 39.4V clamping voltage sits within the range of available substitutes.

Q: Can I use a substitute with higher peak pulse current rating? A: Yes. A higher current rating (such as 207A in the SMCJ22A-TR versus 76.2A in the original) provides additional transient handling capacity. This is backward-compatible from a circuit protection standpoint.

Q: Are there differences in temperature performance? A: The 5.0SMDJ22A operates to 175°C junction temperature versus 150°C for other parts. Selection depends on circuit ambient conditions and thermal management design. All other parts maintain the -55°C to 150°C range.

Q: Do packaging differences affect board layout? A: No. All listed parts use the DO-214AB (SMC) surface mount package with identical footprint and pin configuration. Soldering procedures and PCB landing patterns remain unchanged.

Q: Which substitute is closest to the original SMLJ22E3/TR13 performance? A: The SMLJ22A (Bourns Inc.) provides the closest electrical similarity, matching the original in peak pulse current (84.4A versus 76.2A) and power dissipation (3000W class). Both use similar clamping voltage profiles (35.5V).