SMLJ43A-TP Equivalent & Substitute Parts

Part Overview

The SMLJ43A-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 across a temperature range of -55°C to 175°C and is currently in active production status. The part is available in bulk packaging with 916 pieces in stock.

TVS diodes are essential components in electronic circuits for protecting sensitive components from transient voltage spikes and electrostatic discharge events. Identifying equivalent and substitute parts is necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when supply chain optimization is needed while maintaining identical electrical performance.

Substiute Parts

SMLJ43A-TP

Micro Commercial CoIn Stock: 1008SMLJ43A-TP Datasheet

Current PartRFQ

SMDJ43A

Alpha & Omega Semiconductor Inc.In Stock: 1401SMDJ43A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMLJ43A-TP is determined by strict electrical and mechanical parameter matching within the TVS diode category. The following parameters establish the substitution criteria:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 43V
• Voltage - Breakdown (Min): 47.8V
• Voltage - Clamping (Max) @ Ipp: 69.4V
• Current - Peak Pulse (10/1000µs): 43.2A ±0.1A tolerance
• Power - Peak Pulse: 3000W
• Package / Case: DO-214AB, SMC
• Unidirectional Channels: 1
• Type: Zener

Acceptable Variation Parameters:

• Operating Temperature Range: Substitute must support minimum -55°C to 150°C (lower upper limit acceptable)
• Packaging Format: Bulk or Tape & Reel (TR) both acceptable for equivalent functionality
• Manufacturer: Different manufacturers permitted if all electrical specifications match

The SMDJ43A from Alpha & Omega Semiconductor Inc. qualifies as a direct substitute based on matching all critical electrical parameters and package specifications.

Parameter Comparison

Engineering Selection Recommendations

SMLJ43A-TP (Primary Part):

• Product Status: Active
• Packaging: Bulk
• Inventory: 916 pieces in stock
• REACH Status: REACH Unaffected
• ECCN Classification: EAR99
• Recommended for applications requiring bulk packaging format and extended operating temperature range to 175°C

SMDJ43A (Substitute Part):

• Product Status: Active
• Packaging: Tape & Reel (TR)
• Inventory: 1305 pieces in stock
• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected
• ECCN Classification: EAR99
• Recommended for applications requiring tape and reel packaging format and where operating temperature maximum of 150°C is acceptable

Both parts maintain identical electrical performance for transient voltage suppression applications. Selection between the two should be based on packaging requirements and temperature operating range specifications of the target application. The SMDJ43A offers higher inventory availability and explicit RoHS3 compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can SMDJ43A replace SMLJ43A-TP in all applications?

A: SMDJ43A is electrically equivalent to SMLJ43A-TP for all general-purpose TVS diode applications. The primary consideration is operating temperature: SMDJ43A operates to 150°C maximum, while SMLJ43A-TP operates to 175°C. Verify your application's maximum junction temperature requirement before substitution.

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

A: Bulk packaging (SMLJ43A-TP) is supplied loose in containers, suitable for manual assembly or small-volume production. Tape & Reel packaging (SMDJ43A) is wound on continuous tape for automated pick-and-place assembly equipment. Both formats contain identical components with identical electrical specifications.

Q: Are there any compliance differences between these parts?

A: Both parts are REACH Unaffected and classified as EAR99 for export control purposes. SMDJ43A includes explicit ROHS3 Compliant certification, while SMLJ43A-TP does not list this certification in the provided documentation. Verify RoHS compliance requirements for your specific application.

Q: What does the 0.1A difference in peak pulse current mean?

A: SMLJ43A-TP specifies 43.2A peak pulse current while SMDJ43A specifies 43.3A. This 0.1A variance (0.23% difference) is within normal manufacturing tolerance for TVS diodes and does not affect functional equivalence or circuit protection performance.

Q: Can I use these parts interchangeably on the same PCB?

A: Yes. Both parts use identical DO-214AB (SMC) surface-mount packages with the same footprint, pin configuration, and soldering requirements. PCB layout and assembly processes require no modification when substituting between these parts.

Q: Which part should I select for new designs?

A: For new designs, select based on your assembly process and temperature requirements. Use SMDJ43A for automated assembly with tape and reel capability and 150°C maximum temperature requirement. Use SMLJ43A-TP for manual assembly or applications requiring extended temperature operation to 175°C.