SMLJ20A-Q Equivalent & Substitute Parts

Part Overview

The SMLJ20A-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 20V reverse standoff voltage and 32.4V maximum clamping voltage at peak pulse current. The part is actively produced, AEC-Q101 qualified for automotive applications, and RoHS3 compliant. Equivalent substitute parts are identified to support procurement flexibility, supply chain continuity, and design standardization across manufacturing environments.

Substiute Parts

SMLJ20A-Q

Bourns Inc.In Stock: 1076SMLJ20A-Q Datasheet

Current PartRFQ

SMDJE20AH

Eaton - Electronics DivisionIn Stock: 4039SMDJE20AH Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMLJ20A-Q is determined by strict equivalence across the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 20V
• Voltage - Breakdown (Min): 22.2V
• Voltage - Clamping (Max) @ Ipp: 32.4V
• Current - Peak Pulse (10/1000µs): 92.6A
• Power - Peak Pulse: 3000W
• Unidirectional Channels: 1
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C to 150°C (TJ)

The SMDJE20AH manufactured by Eaton - Electronics Division meets all specified electrical parameters and mechanical requirements, qualifying it as a direct equivalent substitute. Both parts share identical voltage ratings, peak pulse current specifications, power dissipation capability, and thermal operating range. Package compatibility and surface mount configuration are maintained across both components.

Parameter Comparison

Engineering Selection Recommendations

Both the SMLJ20A-Q and SMDJE20AH are active production components with identical electrical specifications and automotive-grade AEC-Q101 qualification. Selection between these parts may be based on procurement availability, supply chain logistics, or inventory management requirements. Both components maintain RoHS3 compliance and MSL Level 1 rating, supporting long-term storage and handling without moisture sensitivity constraints. The electrical and thermal performance characteristics are equivalent, ensuring functional interchangeability in circuit applications requiring 20V standoff protection with 92.6A peak pulse current capability.

Frequently Asked Questions (FAQ)

Q: Can SMDJE20AH be used as a direct replacement for SMLJ20A-Q?

A: Yes. Both components share identical voltage ratings (20V standoff, 22.2V breakdown minimum, 32.4V clamping maximum), peak pulse current (92.6A), power dissipation (3000W), operating temperature range (-55°C to 150°C), and package configuration (DO-214AB, SMC). Both are AEC-Q101 qualified automotive-grade components.

Q: Are there package compatibility concerns when substituting between these parts?

A: No. Both SMLJ20A-Q and SMDJE20AH use the DO-214AB (SMC) surface mount package with identical mechanical dimensions and pin configuration, ensuring PCB layout and assembly compatibility without modification.

Q: Do both parts meet the same compliance and qualification standards?

A: Yes. Both components are AEC-Q101 qualified, RoHS3 compliant, and carry MSL Level 1 rating. Both are actively produced and suitable for automotive applications.

Q: What determines whether a part can substitute for the SMLJ20A-Q?

A: Substitution requires matching all critical electrical parameters: 20V reverse standoff voltage, 22.2V minimum breakdown voltage, 32.4V maximum clamping voltage at peak pulse current, 92.6A peak pulse current, 3000W peak pulse power, unidirectional channel configuration, and DO-214AB (SMC) surface mount package with -55°C to 150°C operating temperature range.

Q: Are there application-specific considerations for selecting between these equivalent parts?

A: Selection is based on procurement availability, supply chain factors, and inventory management. Both parts are functionally equivalent for transient overvoltage protection applications across automotive and industrial environments.