SMLJ54A-Q Equivalent & Substitute Parts

Part Overview

The SMLJ54A-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 voltage protection with a 54V reverse standoff voltage and 87.1V maximum clamping voltage at peak pulse current. 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 inventory availability, supply chain considerations, or design flexibility.

Substiute Parts

SMLJ54A-Q

Bourns Inc.In Stock: 1236SMLJ54A-Q Datasheet

Current PartRFQ

SMDJE54AH

Eaton - Electronics DivisionIn Stock: 4147SMDJE54AH Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMLJ54A-Q are identified based on strict electrical and mechanical equivalence. The following parameters define substitution eligibility:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 54V
• Voltage - Clamping (Max) @ Ipp: 87.1V
• Current - Peak Pulse (10/1000µs): 34.4A
• Power - Peak Pulse: 3000W
• Package / Case: DO-214AB (SMC)
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener

Compliance Parameters:

• Operating Temperature Range: -55°C to 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

The SMDJE54AH from Eaton - Electronics Division meets all critical electrical parameters and mechanical compatibility requirements, maintaining identical voltage ratings, peak pulse current, and power dissipation specifications. Both parts are housed in the DO-214AB (SMC) surface mount package and are qualified to AEC-Q101 automotive standards with identical operating temperature ranges.

Parameter Comparison

Engineering Selection Recommendations

Both the SMLJ54A-Q and SMDJE54AH are active production components with identical electrical specifications and automotive-grade AEC-Q101 qualification. Selection between these parts is based on availability and supply chain requirements rather than technical performance differences.

The SMLJ54A-Q is manufactured by Bourns Inc. and carries ROHS3 compliance certification. The SMDJE54AH is manufactured by Eaton - Electronics Division and is qualified for telecom applications in addition to general use. Both parts operate across the full automotive temperature range (-55°C to 150°C) and maintain MSL 1 moisture sensitivity classification.

For applications requiring documented ROHS3 compliance, the SMLJ54A-Q is the specified choice. For applications where supply availability is the primary constraint, the SMDJE54AH provides equivalent electrical and mechanical performance with identical AEC-Q101 automotive qualification.

Frequently Asked Questions (FAQ)

Q: Can SMDJE54AH be used as a direct replacement for SMLJ54A-Q in automotive applications?

A: Yes. Both parts are AEC-Q101 qualified, automotive-grade components with identical voltage ratings (54V reverse standoff, 87.1V clamping), peak pulse current (34.4A), and power dissipation (3000W). Both are housed in DO-214AB (SMC) surface mount packages and operate across -55°C to 150°C.

Q: Are there differences in RoHS compliance between these parts?

A: The SMLJ54A-Q is specified as ROHS3 compliant. The SMDJE54AH RoHS status is not provided in the available data. Verify RoHS compliance requirements with the component supplier if this is a design constraint.

Q: Do both parts have the same moisture sensitivity level?

A: Yes. Both the SMLJ54A-Q and SMDJE54AH are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Are the package dimensions identical between these parts?

A: Both parts use the DO-214AB (SMC) surface mount package. Verify footprint compatibility with your PCB design, as supplier device package designations may vary slightly between manufacturers.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes, provided the PCB footprint is designed for the DO-214AB (SMC) package. Both parts have identical pin configurations, electrical performance, and thermal characteristics for this package type.