2SA1952-TP Equivalent & Substitute Parts

Part Overview

The 2SA1952-TP is a PNP bipolar junction transistor manufactured by Micro Commercial Co, designed for surface mount applications in the DPAK package. This component operates at a maximum collector current of 5 A and collector-emitter breakdown voltage of 60 V, with a maximum power dissipation of 1 W and transition frequency of 80 MHz. The 2SA1952-TP is classified as obsolete, necessitating identification of active substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

2SA1952-TP

Micro Commercial CoIn Stock: 7732SA1952-TP Datasheet

Current PartRFQ

STD2805T4

STMicroelectronicsIn Stock: 1000226STD2805T4 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SA1952-TP is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Transistor Type: PNP
• Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
• Mounting Type: Surface Mount
• Current - Collector (Ic) (Max): 5 A or greater
• Voltage - Collector Emitter Breakdown (Max): 60 V or greater
• Operating Temperature (TJ): 150°C or greater

Allowable Parameter Variations: Substitute parts may exceed the original specifications in the following parameters without affecting functional compatibility:

• Power - Max: Greater than 1 W
• Frequency - Transition: Greater than 80 MHz
• DC Current Gain (hFE): Greater than 120
• Vce Saturation: Lower values indicate improved performance
• Current - Collector Cutoff (Max): Lower values indicate reduced leakage

The STD2805T4 manufactured by STMicroelectronics meets all mandatory equivalence criteria and exceeds performance specifications in multiple parameters, qualifying it as a direct substitute for the obsolete 2SA1952-TP.

Parameter Comparison

Engineering Selection Recommendations

The STD2805T4 is the qualified substitute for the 2SA1952-TP based on the following engineering criteria:

Electrical Compatibility: The STD2805T4 maintains identical maximum ratings for collector current (5 A) and collector-emitter breakdown voltage (60 V), ensuring direct functional replacement in circuit applications. The substitute component exceeds the original specifications in power dissipation (15 W versus 1 W), transition frequency (150 MHz versus 80 MHz), and DC current gain (200 versus 120), providing enhanced performance margins.

Mechanical Compatibility: Both components utilize the identical TO-252-3 DPAK package with 2 leads plus tab configuration, enabling direct PCB footprint compatibility without layout modifications.

Compliance and Certification: The STD2805T4 maintains ROHS3 compliance, REACH unaffected status, and MSL 1 rating identical to the original component, ensuring regulatory and environmental compatibility for production environments.

Product Availability: The STD2805T4 is classified as active product status with substantial inventory availability (1,000,200 pieces), providing long-term supply security compared to the obsolete 2SA1952-TP.

Frequently Asked Questions (FAQ)

Q: Can the STD2805T4 be used as a direct replacement for the 2SA1952-TP without circuit modifications?

A: Yes. The STD2805T4 is electrically and mechanically compatible with the 2SA1952-TP. Both components share identical maximum collector current (5 A), collector-emitter breakdown voltage (60 V), operating temperature (150°C), and DPAK package configuration. No circuit modifications are required for substitution.

Q: What are the key differences between the 2SA1952-TP and STD2805T4?

A: The STD2805T4 provides superior performance in three areas: maximum power dissipation (15 W versus 1 W), transition frequency (150 MHz versus 80 MHz), and DC current gain (200 versus 120). These enhancements do not affect compatibility and provide additional performance margin in the application circuit.

Q: Are there any package or pinout differences between these components?

A: No. Both the 2SA1952-TP and STD2805T4 use the TO-252-3 DPAK package with identical pinout configuration (2 leads plus tab). PCB footprints are directly compatible without modification.

Q: What is the significance of the lower collector cutoff current in the STD2805T4?

A: The STD2805T4 exhibits lower collector cutoff current (100 nA versus 10 µA), indicating reduced leakage current. This characteristic improves circuit performance by minimizing unwanted current flow in the off state, particularly beneficial in low-power or precision applications.

Q: Are both components RoHS compliant?

A: Yes. Both the 2SA1952-TP and STD2805T4 are ROHS3 compliant with MSL 1 rating (unlimited moisture sensitivity), meeting current environmental and regulatory requirements for electronic component manufacturing and assembly.

Q: Why is the 2SA1952-TP classified as obsolete?

A: The 2SA1952-TP is no longer in active production. The STD2805T4 serves as the active replacement component, offering equivalent electrical and mechanical specifications with enhanced performance characteristics and assured long-term availability.