MPSA14RLRPG Equivalent & Substitute Parts

Part Overview

The MPSA14RLRPG is an NPN Darlington bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 500 mA, collector-emitter breakdown voltage of 30 V, and maximum power dissipation of 625 mW in a through-hole TO-92 package.

The MPSA14RLRPG is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Substitute devices must maintain electrical compatibility within the specified parameter ranges while accommodating potential package or performance variations.

Substiute Parts

MPSA14RLRPG

onsemiIn Stock: 1111MPSA14RLRPG Datasheet

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KSP13TA

onsemiIn Stock: 1968KSP13TA Datasheet

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MMBTA14LT1G

onsemiIn Stock: 125375MMBTA14LT1G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MPSA14RLRPG is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Transistor type must be NPN - Darlington
• Collector-emitter breakdown voltage must be 30 V or greater
• Maximum collector current must be 500 mA or greater
• Vce saturation must not exceed 1.5 V at specified bias conditions
• Collector cutoff current must not exceed 100 nA
• Transition frequency must be 125 MHz or greater
• Operating temperature range must encompass -55°C to 150°C or be compatible with application requirements

Mechanical Compatibility Criteria:

• Package type determines board-level integration method (through-hole versus surface mount)
• Through-hole packages (TO-92) are directly interchangeable in existing PCB layouts
• Surface-mount packages (SOT-23) require PCB redesign but offer equivalent electrical performance

Substitute parts are grouped into two categories: direct through-hole replacements and surface-mount alternatives. Direct replacements maintain identical mounting characteristics. Surface-mount alternatives provide electrical equivalence with different package form factors.

Parameter Comparison

Engineering Selection Recommendations

KSP13TA is the primary direct replacement for the MPSA14RLRPG. Both devices share identical electrical specifications for collector current (500 mA), breakdown voltage (30 V), saturation voltage, and transition frequency (125 MHz). The KSP13TA is manufactured by onsemi and maintains the same through-hole TO-92-3 package form factor, enabling direct PCB substitution without layout modifications. The KSP13TA is classified as active product status with ROHS3 compliance, ensuring long-term supply availability and regulatory alignment. The primary difference is DC current gain (hFE minimum of 10000 versus 20000), which is acceptable for applications where the lower gain does not compromise circuit performance.

MMBTA14LT1G is a surface-mount alternative suitable for applications where package form factor can be modified. This device maintains electrical equivalence in breakdown voltage (30 V), saturation voltage, and transition frequency (125 MHz). The MMBTA14LT1G is classified as active product status with ROHS3 compliance. The maximum collector current is reduced to 300 mA and maximum power dissipation is reduced to 225 mW compared to the original 500 mA and 625 mW specifications. The MMBTA14LT1G is appropriate only for applications where collector current requirements do not exceed 300 mA and power dissipation does not exceed 225 mW. The SOT-23-3 package requires PCB redesign and is not a direct mechanical replacement.

Selection between KSP13TA and MMBTA14LT1G depends on application current requirements and PCB design constraints. For applications requiring 500 mA collector current capability, KSP13TA is the appropriate selection. For applications with reduced current requirements and surface-mount design preference, MMBTA14LT1G is suitable.

Frequently Asked Questions (FAQ)

Q: Can KSP13TA be used as a direct replacement for MPSA14RLRPG without PCB modifications?

A: Yes. The KSP13TA is packaged in TO-92-3, identical to the MPSA14RLRPG. Pin configuration and mechanical dimensions are compatible, enabling direct substitution in existing through-hole PCB layouts without design changes.

Q: What is the primary electrical difference between KSP13TA and MPSA14RLRPG?

A: The DC current gain (hFE) minimum specification differs. MPSA14RLRPG specifies 20000 @ 100mA, 5V, while KSP13TA specifies 10000 @ 100mA, 5V. All other electrical parameters, including collector current, breakdown voltage, saturation voltage, and transition frequency, are identical. The lower gain of KSP13TA is acceptable for applications where circuit design does not depend on the higher gain specification.

Q: Can MMBTA14LT1G replace MPSA14RLRPG in all applications?

A: No. MMBTA14LT1G has reduced maximum collector current (300 mA versus 500 mA) and reduced maximum power dissipation (225 mW versus 625 mW). MMBTA14LT1G is suitable only for applications where collector current does not exceed 300 mA and power dissipation does not exceed 225 mW. Additionally, MMBTA14LT1G uses SOT-23-3 surface-mount package, requiring PCB redesign.

Q: What is the significance of product status (Obsolete versus Active)?

A: Obsolete products may have limited or discontinued supply. Active products have ongoing manufacturing and supply availability. KSP13TA and MMBTA14LT1G are both active products, ensuring continued availability for new designs and production requirements.

Q: Are KSP13TA and MMBTA14LT1G RoHS compliant?

A: Yes. Both KSP13TA and MMBTA14LT1G are ROHS3 compliant, meeting regulatory requirements for hazardous substance restrictions in electronic equipment.

Q: What operating temperature range does KSP13TA support?

A: KSP13TA specifies maximum junction temperature of 150°C. The MPSA14RLRPG specifies operating temperature range of -55°C to 150°C. For applications requiring operation below ambient temperature or requiring the full -55°C lower limit, verify that KSP13TA thermal characteristics are adequate for the specific application environment.

Q: Can multiple substitute parts be used interchangeably within a single design?

A: No. KSP13TA and MMBTA14LT1G have different package types (through-hole versus surface-mount) and different electrical specifications (collector current and power dissipation). Selection must be based on specific application requirements. Mixing package types within a single PCB design is not recommended.