MPSA05 Equivalent & Substitute Parts

Part Overview

The MPSA05 is an NPN general-purpose bipolar junction transistor manufactured by onsemi, housed in a TO-92 package. This device is classified as obsolete, indicating discontinued production and limited availability in the market. The MPSA05 operates at a maximum collector-emitter breakdown voltage of 60V and is designed for general-purpose switching and amplification applications in through-hole configurations.

Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity, procurement reliability, and long-term product support. The substitute parts listed below maintain electrical compatibility within the specified parameter ranges while offering improved availability and compliance status.

Substiute Parts

MPSA05

onsemiIn Stock: 17204MPSA05 Datasheet

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MMBT100

onsemiIn Stock: 65415MMBT100 Datasheet

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2N3417 APM PBFREE

Central Semiconductor CorpIn Stock: 10122N3417 APM PBFREE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MPSA05 is determined by the following critical parameters:

Transistor Type: All substitute parts must be NPN configuration to maintain circuit polarity and biasing requirements.

Voltage Rating: Substitute parts must have a collector-emitter breakdown voltage (VCEO) equal to or greater than the MPSA05 specification of 60V. This ensures the transistor can withstand the same or higher voltage stress in the application circuit.

Mounting Type and Package: Substitute parts are grouped into two categories based on mounting requirements:

• Through-hole mounted devices in TO-92 package for direct pin-compatible replacement
• Surface-mount devices in SOT-23-3 package for redesigned PCB layouts

Current Rating: Substitute parts must support the application's collector current requirements. The MPSA05 does not specify a maximum collector current in the provided data; therefore, substitute parts with 500 mA or greater collector current capacity are acceptable for general-purpose applications.

Product Status and Compliance: Active product status and RoHS3 compliance are preferred for new designs and long-term availability assurance.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole PCB Designs (Direct Pin Replacement):

The 2N3417 APM PBFREE is the recommended substitute for through-hole applications requiring direct TO-92 package compatibility. This device is manufactured by Central Semiconductor Corp and maintains active product status with ROHS3 compliance. The 2N3417 APM PBFREE operates at a maximum collector-emitter breakdown voltage of 50V, which is below the MPSA05 specification of 60V. Circuit designs operating below 50V can proceed with this substitute without modification. For applications requiring the full 60V rating, circuit redesign or voltage derating is necessary.

For Surface-Mount PCB Designs (Redesigned Layouts):

The MMBT100 manufactured by onsemi is suitable for new designs utilizing surface-mount technology. This device is available in SOT-23-3 package with active product status and ROHS3 compliance. The MMBT100 operates at a maximum collector-emitter breakdown voltage of 45V, requiring circuit voltage derating compared to the MPSA05. This substitute is appropriate for applications with collector-emitter voltages not exceeding 45V.

Compliance Considerations:

Both substitute parts are ROHS3 compliant, addressing regulatory requirements that the obsolete MPSA05 does not meet. The MPSA05's RoHS non-compliant status may restrict its use in new product designs subject to RoHS directives. Substitution with ROHS3-compliant alternatives ensures regulatory alignment for current and future manufacturing standards.

Availability:

The MMBT100 has inventory of 65,400 pieces, and the 2N3417 APM PBFREE has inventory of 970 pieces, compared to the MPSA05's 17,100 pieces. For long-term procurement planning, the MMBT100 offers superior availability assurance.

Frequently Asked Questions (FAQ)

Q: Can the MMBT100 directly replace the MPSA05 in existing through-hole designs?

A: No. The MMBT100 is a surface-mount device in SOT-23-3 package, while the MPSA05 uses through-hole TO-92 package. Direct PCB substitution is not possible without layout redesign. The 2N3417 APM PBFREE is the appropriate through-hole substitute.

Q: What is the voltage derating requirement when substituting with MMBT100 or 2N3417 APM PBFREE?

A: The MMBT100 has a maximum VCEO of 45V compared to the MPSA05's 60V, requiring a 15V derating. The 2N3417 APM PBFREE has a maximum VCEO of 50V, requiring a 10V derating. Applications must operate within these reduced voltage limits or require circuit modification.

Q: Are the substitute parts pin-compatible with the MPSA05?

A: The 2N3417 APM PBFREE maintains TO-92 package pinout compatibility with the MPSA05 for through-hole applications. The MMBT100 in SOT-23-3 package is not pin-compatible and requires PCB redesign.

Q: What is the significance of the ROHS3 compliance status?

A: ROHS3 compliance indicates the substitute parts meet current Restriction of Hazardous Substances directives, restricting lead, cadmium, mercury, and other hazardous materials. The MPSA05's RoHS non-compliant status may prohibit its use in new designs subject to RoHS regulations. Substitution with ROHS3-compliant parts ensures regulatory compliance.

Q: Can the MPSA05 be used interchangeably with its substitutes in all applications?

A: No. Voltage rating differences require circuit analysis. Applications operating at collector-emitter voltages above 45V cannot use the MMBT100. Applications operating above 50V cannot use the 2N3417 APM PBFREE. The MPSA05's 60V rating provides the highest voltage capability among these three devices.

Q: What are the current handling differences between these transistors?

A: All three devices support 500 mA maximum collector current. The 2N3417 APM PBFREE has a maximum power dissipation of 1500 mW, compared to the MMBT100's 350 mW. For high-power applications, the 2N3417 APM PBFREE offers superior thermal capability.