SI2102-TP N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The SI2102-TP is an N-Channel MOSFET manufactured by Micro Commercial Co, rated for 20V drain-to-source voltage with 2.1A continuous drain current at 25°C. The device is housed in a SOT-323 (SC-70) surface mount package and dissipates a maximum of 200mW. This part is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement continuity. The SI2102-TP remains in stock with 18,970 pieces available as new original inventory.

Substiute Parts

SI2102-TP

Micro Commercial CoIn Stock: 19017SI2102-TP Datasheet

Current PartRFQ

SI2102A-TP

Micro Commercial CoIn Stock: 273700SI2102A-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SI2102-TP is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Drain-to-Source Voltage (Vdss) must equal or exceed 20V
• Continuous Drain Current (Id) must equal or exceed 2.1A at 25°C
• On-State Resistance (Rds On) must not exceed the maximum specified value to ensure thermal performance
• Gate Threshold Voltage (Vgs(th)) must be compatible with existing drive circuitry
• Power Dissipation capability must support the application thermal budget
• Operating temperature range must encompass -55°C to 150°C

Mechanical Compatibility Criteria:

• Package type must be SOT-323 (SC-70) for direct board-level substitution
• Surface mount configuration required
• Moisture Sensitivity Level (MSL) must be compatible with assembly processes

The SI2102A-TP qualifies as a direct substitute based on these parameters. Both devices share identical Vdss (20V), identical package (SOT-323), identical power dissipation (200mW), identical operating temperature range (-55°C to 150°C), and identical RoHS3 compliance status. The SI2102A-TP provides enhanced performance with higher continuous drain current (3A versus 2.1A) and lower gate charge (3.6nC versus 10nC), making it a suitable replacement for the obsolete SI2102-TP.

Parameter Comparison

Engineering Selection Recommendations

SI2102A-TP as Primary Substitute:

The SI2102A-TP is the direct equivalent for the obsolete SI2102-TP. Both devices are manufactured by Micro Commercial Co and share identical electrical ratings for Vdss (20V), power dissipation (200mW), and operating temperature range (-55°C to 150°C). Both are packaged in SOT-323 (SC-70) surface mount configuration and comply with ROHS3 standards with MSL 1 rating.

The SI2102A-TP offers superior performance characteristics: continuous drain current is increased from 2.1A to 3A, gate charge is reduced from 10nC to 3.6nC, and input capacitance is reduced from 300pF to 220pF. These improvements result in faster switching performance and reduced gate drive requirements.

Product Status Consideration:

The SI2102-TP is classified as obsolete, while the SI2102A-TP maintains active product status. This distinction is significant for long-term supply chain planning and technical support availability. The SI2102A-TP is the recommended selection for new designs and ongoing production support.

Compliance and Certification:

Both parts maintain ROHS3 compliance and MSL 1 (unlimited moisture sensitivity) rating, ensuring compatibility with standard surface mount assembly processes and environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can the SI2102A-TP directly replace the SI2102-TP on existing PCBs?

A: Yes. Both devices use identical SOT-323 (SC-70) surface mount packaging with the same pinout and footprint. No PCB modifications are required for direct substitution.

Q: What are the key electrical differences between SI2102-TP and SI2102A-TP?

A: The SI2102A-TP provides higher continuous drain current (3A versus 2.1A), lower gate charge (3.6nC versus 10nC), and lower input capacitance (220pF versus 300pF). Drain-to-source voltage, power dissipation, and operating temperature range remain identical.

Q: Are there any drive circuit modifications needed when switching from SI2102-TP to SI2102A-TP?

A: No modifications are required. The SI2102A-TP has a lower gate threshold voltage (1.1V versus 1.2V) and reduced gate charge, which results in improved gate drive efficiency. Existing drive circuits will operate with the SI2102A-TP without adjustment.

Q: What is the significance of the obsolete status for SI2102-TP?

A: Obsolete status indicates that the SI2102-TP is no longer in active production. While 18,970 pieces remain in stock as new original inventory, long-term availability cannot be guaranteed. The SI2102A-TP, with active product status, is recommended for designs requiring extended production runs or future product revisions.

Q: Are both parts RoHS3 compliant?

A: Yes. Both SI2102-TP and SI2102A-TP are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating, meeting standard environmental and assembly process requirements.

Q: Can the SI2102A-TP handle higher current applications than the SI2102-TP?

A: Yes. The SI2102A-TP is rated for 3A continuous drain current compared to 2.1A for the SI2102-TP. Applications requiring current levels between 2.1A and 3A benefit from the increased current capability of the SI2102A-TP.

Q: What is the impact of reduced gate charge on circuit performance?

A: The SI2102A-TP gate charge of 3.6nC (versus 10nC for SI2102-TP) reduces the charge required to switch the device on and off. This results in faster switching transitions, reduced gate drive power consumption, and improved overall circuit efficiency.