2STF2220 Equivalent & Substitute Parts

Part Overview

The 2STF2220 is a PNP bipolar junction transistor manufactured by STMicroelectronics, rated for 20 V collector-emitter breakdown voltage and 1.5 A maximum collector current. The device is packaged in SOT-89-3 surface mount configuration and rated for 1.4 W maximum power dissipation. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity.

Substiute Parts

2STF2220

STMicroelectronicsIn Stock: 52122STF2220 Datasheet

Current PartRFQ

PBSS5320X,135

Nexperia USA Inc.In Stock: 9079PBSS5320X,135 Datasheet

SimilarRFQ

PBSS5520X,135

Nexperia USA Inc.In Stock: 2748PBSS5520X,135 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2STF2220 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Requirements:

• Transistor type must be PNP
• Voltage - Collector Emitter Breakdown (Max) must be ≥ 20 V
• Current - Collector (Ic) (Max) must be ≥ 1.5 A
• Operating temperature rating must be ≥ 150°C (TJ)
• Package / Case must be TO-243AA
• Supplier Device Package must be SOT-89 or SOT-89-3

Compliance Requirements:

• RoHS3 Compliance required
• REACH Unaffected status required

The identified substitute parts PBSS5320X,135 and PBSS5520X,135 meet or exceed all electrical parameters of the 2STF2220 while maintaining identical package specifications and compliance certifications. Both substitute parts are manufactured by Nexperia USA Inc. and carry active product status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

PBSS5320X,135 Selection Criteria: The PBSS5320X,135 is suitable for applications requiring direct replacement of the 2STF2220 with enhanced current handling capability (3 A vs. 1.5 A). This substitute provides improved saturation voltage characteristics (300 mV vs. 450 mV) and maintains identical voltage ratings. The part carries active product status with AEC-Q100 automotive qualification, ensuring continued availability and supply chain reliability. Moisture sensitivity is improved to MSL 1 (Unlimited) compared to the original part's MSL 3 rating.

PBSS5520X,135 Selection Criteria: The PBSS5520X,135 is appropriate for applications requiring maximum current capacity (5 A) while maintaining the 20 V voltage specification. This substitute offers the lowest saturation voltage (270 mV) and highest DC current gain (250 @ 2A, 2V) among available options. Active product status and AEC-Q100 qualification provide long-term design security. This part is selected when design margins for current handling and switching performance are prioritized.

Compliance and Availability: Both substitute parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory alignment with the original component. Active product status from Nexperia USA Inc. guarantees ongoing manufacturing support and supply availability, eliminating obsolescence risk associated with the 2STF2220.

Frequently Asked Questions (FAQ)

Q: Can PBSS5320X,135 or PBSS5520X,135 be used as direct pin-for-pin replacements for 2STF2220?

A: Yes. Both substitute parts share identical TO-243AA package and SOT-89 surface mount configuration. Pin assignments are compatible for direct PCB substitution without layout modifications.

Q: What is the difference between PBSS5320X,135 and PBSS5520X,135?

A: The primary differences are maximum collector current (3 A vs. 5 A) and saturation voltage characteristics. PBSS5320X,135 provides 300 mV saturation voltage at 3 A, while PBSS5520X,135 provides 270 mV at 5 A. Both maintain 20 V voltage rating and 150°C operating temperature. Selection depends on circuit current requirements and switching performance specifications.

Q: Are there any thermal or power dissipation concerns when substituting?

A: Both substitute parts are rated for 1.6 W maximum power dissipation, compared to 1.4 W for the 2STF2220. Operating temperature rating remains 150°C (TJ) for all three parts. Thermal design considerations should account for the specific application current levels and duty cycles.

Q: What is the significance of the improved saturation voltage in the substitute parts?

A: Lower saturation voltage (300 mV and 270 mV vs. 450 mV) indicates reduced voltage drop across the transistor in saturation mode. This results in lower power dissipation and improved switching efficiency, particularly beneficial in high-frequency or high-current applications.

Q: How does the MSL rating difference affect component handling?

A: The 2STF2220 carries MSL 3 (168 Hours), requiring moisture bake-out procedures if exposed to humidity beyond specified limits. Both substitute parts carry MSL 1 (Unlimited), eliminating moisture sensitivity concerns and simplifying component storage and handling procedures.

Q: Are the substitute parts qualified for automotive applications?

A: Yes. Both PBSS5320X,135 and PBSS5520X,135 carry AEC-Q100 automotive qualification, meeting stringent automotive reliability and performance standards. The original 2STF2220 does not carry automotive qualification.

Q: What is the transition frequency specification, and why do the substitutes include this parameter?

A: Transition frequency (100 MHz for both substitutes) defines the frequency at which current gain drops to unity. This parameter is relevant for high-frequency switching applications. The original 2STF2220 does not specify this parameter, indicating the substitutes offer enhanced high-frequency performance characteristics.