SMLJ14A-TP Equivalent & Substitute Parts

Part Overview

The SMLJ14A-TP is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose interface protection applications. This surface-mount component operates with a 14V reverse standoff voltage and provides 3000W peak pulse power dissipation in a compact DO-214AB (SMC) package. The part is currently in active production status with 642 pieces available in bulk packaging. Substitute parts are identified to address inventory availability, packaging format preferences, or supply chain requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

SMLJ14A-TP

Micro Commercial CoIn Stock: 672SMLJ14A-TP Datasheet

Current PartRFQ

SMDJ14A

Alpha & Omega Semiconductor Inc.In Stock: 10382SMDJ14A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMLJ14A-TP is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 14V
• Voltage - Breakdown (Min): 15.6V
• Voltage - Clamping (Max) @ Ipp: 23.2V
• Current - Peak Pulse (10/1000µs): 129.4A
• Power - Peak Pulse: 3000W
• Unidirectional Channels: 1
• Type: Zener

Mechanical Parameters (Must Match):

• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount

Acceptable Variations:

• Packaging format (Bulk vs. Tape & Reel)
• Operating temperature range (provided minimum operating temperature does not exceed -55°C and maximum does not fall below 150°C)
• Manufacturer identity
• Inventory quantity

The SMDJ14A from Alpha & Omega Semiconductor Inc. qualifies as a direct substitute based on identical electrical specifications and package configuration. The operating temperature range of -55°C to 150°C is acceptable as it covers the critical lower bound and maintains adequate high-temperature performance for general-purpose applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: SMLJ14A-TP

Select the SMLJ14A-TP when bulk packaging is required for high-volume manufacturing or when existing supply agreements specify Micro Commercial Co as the authorized supplier. This part maintains active production status and is REACH compliant.

Substitute Part: SMDJ14A

The SMDJ14A from Alpha & Omega Semiconductor Inc. is electrically and mechanically equivalent and qualifies as a direct substitute. This part is preferred when:

• Tape & Reel packaging is required for automated assembly processes
• Higher inventory availability (10,300 pieces) is needed to meet production schedules
• RoHS3 compliance certification is explicitly required by procurement specifications
• Supply chain diversification across multiple manufacturers is a strategic objective

Both parts maintain identical electrical performance across all critical parameters: 14V reverse standoff voltage, 15.6V minimum breakdown voltage, 23.2V maximum clamping voltage, 129.4A peak pulse current, and 3000W peak pulse power dissipation. Both are surface-mount components in DO-214AB (SMC) packages suitable for identical PCB layouts and assembly processes.

The operating temperature range difference (-55°C to 150°C for SMDJ14A versus -55°C to 175°C for SMLJ14A-TP) does not restrict substitution for general-purpose interface protection applications, as the SMDJ14A maintains the full lower operating bound and adequate high-temperature margin for standard industrial and commercial environments.

Frequently Asked Questions (FAQ)

Q: Can SMDJ14A be used as a direct replacement for SMLJ14A-TP in existing designs?

A: Yes. The SMDJ14A is electrically and mechanically equivalent. All critical electrical parameters are identical: reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, and power dissipation. Both components use the DO-214AB (SMC) surface-mount package and are compatible with identical PCB footprints and assembly processes.

Q: What is the difference between bulk and Tape & Reel packaging?

A: Bulk packaging (SMLJ14A-TP) is suitable for manual handling, small-batch assembly, or storage in component bins. Tape & Reel packaging (SMDJ14A) is designed for automated pick-and-place assembly equipment and is standard for high-volume manufacturing. The electrical performance is identical; packaging format is determined by assembly process requirements.

Q: Does the operating temperature range difference affect substitution?

A: No. The SMDJ14A operating range of -55°C to 150°C is acceptable for general-purpose interface protection. The lower bound (-55°C) matches the SMLJ14A-TP, and the upper bound (150°C) provides adequate margin for standard industrial and commercial applications. If applications require operation above 150°C, the SMLJ14A-TP with its 175°C maximum is required.

Q: Are both parts RoHS compliant?

A: The SMDJ14A is explicitly certified as ROHS3 compliant. The SMLJ14A-TP RoHS status is not specified in available documentation. Both parts are REACH unaffected. If RoHS3 certification is a procurement requirement, the SMDJ14A is the confirmed choice.

Q: Can these parts be used interchangeably in the same circuit?

A: Yes. Identical electrical specifications (voltage, current, power ratings) and mechanical compatibility (same package, same footprint) ensure functional interchangeability. No circuit modifications or re-qualification testing is required when substituting between these parts.

Q: What determines whether a part qualifies as a substitute?

A: Substitution is based on strict equivalence across electrical parameters (voltage ratings, current ratings, power dissipation, channel configuration) and mechanical parameters (package type, mounting method). Packaging format, manufacturer identity, and inventory quantity are acceptable variables. Operating temperature range must maintain the critical lower bound (-55°C) and provide adequate high-temperature performance for the intended application.