SI1012-TP N-Channel MOSFET 20V 500mA Equivalent & Substitute Parts

Part Overview

The SI1012-TP is an N-Channel MOSFET manufactured by Micro Commercial Co, designed for surface mount applications in the SOT-523 package. This device operates at 20V drain-to-source voltage with a continuous drain current rating of 500mA and maximum power dissipation of 150mW. The SI1012-TP is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and component procurement.

Substiute Parts

SI1012-TP

Micro Commercial CoIn Stock: 912SI1012-TP Datasheet

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SI3134KEA-TP

Micro Commercial CoIn Stock: 2632SI3134KEA-TP Datasheet

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PJE8408_R1_00001

Panjit International Inc.In Stock: 298986PJE8408_R1_00001 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SI1012-TP is determined by the following critical electrical and mechanical parameters:

Mandatory Matching Criteria:

• Drain to Source Voltage (Vdss): 20V minimum
• FET Type: N-Channel
• Technology: MOSFET (Metal Oxide)
• Package / Case: SOT-523 compatible
• Operating Temperature Range: -55°C to 150°C minimum
• RoHS3 Compliance

Performance Compatibility Criteria:

• Continuous Drain Current (Id): Equal to or greater than 500mA
• Power Dissipation: Equal to or greater than 150mW
• Gate Threshold Voltage (Vgs(th)): Within acceptable switching range
• On-State Resistance (Rds On): Lower values indicate improved performance

The substitute parts identified below meet or exceed the mandatory matching criteria and provide equivalent or superior electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

SI3134KEA-TP (Micro Commercial Co)

The SI3134KEA-TP is an active product from the same manufacturer as the SI1012-TP. This substitute provides superior electrical performance with a 750mA continuous drain current rating (50% higher than the original) and significantly improved on-state resistance of 300mOhm at 500mA and 4.5V (compared to 850mOhm in the SI1012-TP). Power dissipation capability is increased to 180mW. The device maintains identical voltage ratings, package form factor, and temperature operating range. RoHS3 compliance and MSL-1 rating are preserved. This substitute is suitable for direct replacement in applications where the original SI1012-TP is specified.

PJE8408_R1_00001 (Panjit International Inc.)

The PJE8408_R1_00001 is an active product from Panjit International Inc., offering equivalent drain current (500mA) and voltage ratings (20V) to the SI1012-TP. This substitute provides enhanced power dissipation capability at 300mW (double the original rating) and improved on-state resistance of 400mOhm at 500mA and 4.5V. The device operates across the same temperature range and maintains RoHS3 compliance and MSL-1 rating. Package designation is SOT-523 with flat leads (SC-89 / SOT-490 equivalent). This substitute is suitable for applications requiring higher thermal headroom or where Panjit sourcing is preferred.

Both substitute parts are currently in active production status, ensuring long-term availability and supply chain continuity compared to the obsolete SI1012-TP.

Frequently Asked Questions (FAQ)

Q: Can the SI3134KEA-TP be used as a direct replacement for the SI1012-TP?

A: Yes. The SI3134KEA-TP meets all mandatory matching criteria: identical 20V Vdss rating, N-Channel MOSFET technology, SOT-523 package, -55°C to 150°C operating range, and RoHS3 compliance. The substitute provides superior performance with higher drain current (750mA vs. 500mA) and lower on-state resistance (300mOhm vs. 850mOhm).

Q: What is the primary advantage of using PJE8408_R1_00001 over SI3134KEA-TP?

A: The PJE8408_R1_00001 offers double the power dissipation capability (300mW vs. 180mW), making it suitable for applications with higher thermal requirements. Both devices provide improved on-state resistance compared to the original SI1012-TP. Selection depends on thermal design constraints and supplier availability.

Q: Are there any package compatibility concerns between these substitutes?

A: All three devices use SOT-523 package form factor. The PJE8408_R1_00001 is specified with flat leads (SC-89 / SOT-490 designation), which is mechanically compatible with standard SOT-523 PCB layouts. No package-related design modifications are required.

Q: Do these substitutes maintain the same gate threshold voltage as the SI1012-TP?

A: The gate threshold voltages are similar but not identical. SI1012-TP: 1.2V @ 250µA; SI3134KEA-TP: 1.1V @ 250µA; PJE8408_R1_00001: 0.9V @ 250µA. All values fall within acceptable switching ranges for standard gate drive circuits. Applications with marginal gate drive voltage may benefit from the lower threshold voltage of the PJE8408_R1_00001.

Q: Why is the SI1012-TP classified as obsolete?

A: The SI1012-TP is no longer in active production. The identified substitute parts (SI3134KEA-TP and PJE8408_R1_00001) are active products offering equivalent or superior electrical performance and ensure continued component availability for new designs and legacy system support.

Q: Are all three devices RoHS3 compliant?

A: Yes. The SI1012-TP, SI3134KEA-TP, and PJE8408_R1_00001 are all ROHS3 compliant with MSL-1 (unlimited) moisture sensitivity rating, meeting environmental and regulatory requirements for industrial and commercial applications.