SMLJ22A-Q Equivalent & Substitute Parts

Part Overview

The SMLJ22A-Q is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for surface mount applications in the DO-214AB (SMC) package. This component provides transient overvoltage protection with a 22V reverse standoff voltage and 35.5V maximum clamping voltage. The part is actively produced, AEC-Q101 qualified for automotive applications, and RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or inventory availability.

Substiute Parts

SMLJ22A-Q

Bourns Inc.In Stock: 1111SMLJ22A-Q Datasheet

Current PartRFQ

SMDJE22AH

Eaton - Electronics DivisionIn Stock: 3963SMDJE22AH Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMLJ22A-Q is determined by strict equivalence in the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 22V
• Voltage - Breakdown (Min): 24.4V
• Voltage - Clamping (Max) @ Ipp: 35.5V
• Current - Peak Pulse (10/1000µs): ≥84.4A
• Power - Peak Pulse: 3000W (3kW)
• Operating Temperature Range: -55°C to 150°C (TJ)
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Grade: Automotive
• Qualification: AEC-Q101

The SMDJE22AH from Eaton - Electronics Division meets all substitution criteria with identical voltage ratings, equivalent peak pulse current (84.5A), matching power dissipation, automotive grade qualification, and identical package specifications.

Parameter Comparison

Engineering Selection Recommendations

The SMDJE22AH is a direct substitute for the SMLJ22A-Q based on electrical equivalence and compliance alignment. Both components are active products with AEC-Q101 automotive qualification, ensuring suitability for automotive transient voltage suppression applications. The SMDJE22AH maintains identical voltage protection characteristics, peak pulse current rating, and thermal operating range. Both components are surface mount in the DO-214AB (SMC) package with MSL 1 moisture sensitivity classification. Selection between these parts may be based on supply availability, lead time, or procurement requirements, as no technical differentiation exists in the specified parameters.

Frequently Asked Questions (FAQ)

Q: Can the SMDJE22AH replace the SMLJ22A-Q in existing designs?

A: Yes. The SMDJE22AH is electrically and mechanically equivalent. Both components have identical voltage ratings (22V standoff, 24.4V breakdown, 35.5V clamping), equivalent peak pulse current (84.4A vs 84.5A), matching power dissipation (3000W), and identical package specifications (DO-214AB, SMC). No design modifications are required.

Q: Are there any compliance or certification differences?

A: No. Both the SMLJ22A-Q and SMDJE22AH are AEC-Q101 qualified for automotive applications and meet equivalent compliance standards. Both are RoHS compliant and have MSL 1 moisture sensitivity classification.

Q: What is the operating temperature range for both parts?

A: Both components operate across the identical temperature range of -55°C to 150°C (junction temperature), suitable for automotive and industrial applications.

Q: Are the packages identical?

A: Yes. Both parts use the DO-214AB (SMC) surface mount package, ensuring identical PCB footprint and assembly compatibility.

Q: What determines if a part can substitute for the SMLJ22A-Q?

A: Substitution requires equivalence in reverse standoff voltage (22V), breakdown voltage (24.4V minimum), clamping voltage (35.5V maximum), peak pulse current (≥84.4A), power dissipation (3000W), operating temperature range (-55 to 150°C), package type (DO-214AB, SMC), and automotive grade qualification (AEC-Q101).