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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

STMicroelectronics 2STR2230

Name: 2STR2230
Brand: STMicroelectronics
SKU: 2STR2230
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2STR2230

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: 2STR2230.pdf

Description:: TRANS PNP 30V 1.5A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:8,534

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Product details

Overview

2STR2230 from STMicroelectronics is a low-voltage, fast-switching PNP power transistor in SOT-23 package, featuring V_CE(sat) = –0.17 V (IC = –0.1 A, IB = –1 mA), h_FE = 210–560 (IC = –50 mA to –1 A), and f_t = 100 MHz. It delivers high current gain with ultra-low saturation voltage for efficient switching in compact DC-DC regulation and LED driver stages.

For engineers reviewing the 2STR2230 datasheet, 2STR2230 pinout, 2STR2230 application, or 2STR2230 equivalent, key selection criteria include verified PNP polarity, SOT-23 terminal mapping, –30 V V_CEO rating, –1.5 A continuous collector current, and thermal resistance of 250 °C/W under PCB-mounted conditions.

Technical Context

This PNP bipolar junction transistor uses ST's PB-HCD (Power Bipolar High Current Density) process to achieve simultaneous high h_FE and low V_CE(sat), enabling high-efficiency linear and switching operation at low voltages. Its –30 V V_CEO and –5 V V_EBO support robust biasing in negative-rail applications.

Designed for surface-mount use, it operates with pulse-tested switching times of t_on = 74 ns and t_off = 200 ns under resistive load (V_CC = –10 V, I_C = –1.5 A), and exhibits C_CBO = 10 pF at V_CB = –10 V, supporting stable high-frequency switching up to 100 MHz.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	–30 V: Maximum safe collector-emitter voltage with base open; defines usable rail range in negative-supply circuits.
I_C (cont.)	–1.5 A: Continuous collector current rating; supports medium-power load switching without forced cooling on standard PCBs.
V_CE(sat)	–0.17 V (IC = –0.1 A): Ultra-low saturation voltage reduces conduction loss and self-heating in linear regulators and LED current sinks.
h_FE	210–560 (IC = –50 mA to –1 A): High and stable DC current gain enables low-base-drive designs and improves control precision.
f_t	100 MHz: Transition frequency confirms suitability for high-speed switching in DC-DC converters and PWM dimming drivers.
R_thj-amb	250 °C/W: Thermal resistance measured on 1 cm² PCB; determines required copper area for thermal management at 0.5 W dissipation.

Pinout & Package

The 2STR2230 is housed in a miniature SOT-23 plastic package compliant with ECOPACK® environmental standards. Dimensions conform to JEDEC TO-236AB, with 0.95 mm pitch and 2.926 mm × 2.80 mm footprint.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitter terminal (PNP)	Connected to higher potential rail; carries full load current and sets reference for base biasing.
2 (Base)	Control input	Receives negative base current to turn on; requires compatible driver with sufficient sink capability (e.g., microcontroller GPIO or logic gate).
3 (Collector)	Output terminal (PNP)	Connected to load and lower-potential supply; voltage drop across this pin defines output regulation accuracy and efficiency.

Key Features

Feature	Design Value
Very low V_CE(sat)	–0.17 V at IC = –0.1 A enables <170 mW conduction loss per transistor in low-voltage linear regulation.
High h_FE range	210–560 over IC = –50 mA to –1 A ensures stable gain across operating range, reducing base drive variability.
Fast switching	t_on/t_off = 74/200 ns allows >1 MHz PWM operation in LED dimming and synchronous rectification.
SOT-23 surface-mount	Standardized 3-pin footprint enables automated assembly and space-constrained layout on mobile and storage PCBs.

Applications

LED Driver

Motherboard Power Control

Use Scenario: Constant-current sinking for RGB backlighting in ultrathin notebooks and SSD indicator arrays.

IC Role / Device Role / Timing Role: PNP current sink transistor regulating LED string current via base-controlled saturation.

Use Value: Low V_CE(sat) minimizes heat generation in thermally constrained zones; high h_FE reduces MCU GPIO loading.

Use Scenario: Enable/disable 3.3 V or 5 V auxiliary rails on motherboard VRM outputs or chipset power domains.

IC Role / Device Role / Timing Role: High-gain PNP switch controlling PMOS gate pull-down or direct low-side enable path.

Use Value: Fast t_off = 200 ns ensures clean power sequencing; SOT-23 footprint saves board space near dense BGA packages.

Battery Charger Path Switch

Voltage Regulator Pass Element

Use Scenario: Reverse-polarity protection and charge-path isolation in single-cell Li-ion portable chargers.

IC Role / Device Role / Timing Role: PNP configured as high-side switch between battery and load, blocking reverse current during USB disconnect.

Use Value: –30 V V_CEO withstands transient spikes; low V_CE(sat) preserves charging efficiency above 95%.

Use Scenario: Linear pass element in low-noise 3.3 V LDO for RF front-end or sensor analog supply.

IC Role / Device Role / Timing Role: Emitter-follower configuration providing regulated output with minimal dropout and ripple rejection.

Use Value: High h_FE enables precise output setpoint control using low-power op-amp feedback; low noise due to bipolar construction.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP power switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT2907A	V_CEO = –60 V, V_CE(sat) = –0.4 V (IC = –150 mA), h_FE = 100–300	Higher breakdown but higher saturation loss; less suitable for low-dropout linear regulation	Prefer where overvoltage robustness outweighs efficiency needs
BC807-40	V_CEO = –45 V, V_CE(sat) = –0.7 V (IC = –500 mA), h_FE = 250–630	Lower f_t (~150 MHz but uncharacterized for switching), higher V_CE(sat) limits power efficiency	Acceptable for general-purpose switching where speed and loss are secondary

Compared with MMBT2907A and BC807-40, the 2STR2230 uniquely balances ultra-low V_CE(sat), high h_FE, and 100 MHz f_t in SOT-23-making it optimal for space-constrained, efficiency-critical PNP switching in mobile and storage systems.

Availability

2STR2230 is available at Aetrix Electronics and suitable for LED driver modules, motherboard power sequencing, and battery charger path control requiring stable component supply and long-term industrial availability.

Supply support for 2STR2230 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, MEMS, and microcontrollers for industrial, automotive, and consumer markets.

The 2STR2230 belongs to ST's low-voltage bipolar power transistor family, engineered specifically for high-efficiency, high-density DC-DC conversion and load switching in portable and storage electronics.

FAQ

Is the 2STR2230 a PNP or NPN transistor?

The 2STR2230 is a PNP bipolar junction transistor, confirmed by its negative polarity ratings: V_CEO = –30 V, V_EBO = –5 V, and negative current values throughout the datasheet. Its internal schematic (Figure 1) shows emitter as the highest-potential terminal, consistent with PNP operation in high-side or current-sink configurations.

What is the maximum power dissipation and thermal derating behavior?

The 2STR2230 has P_tot = 0.5 W at T_amb = 25°C, with R_thj-amb = 250 °C/W on a 1 cm² PCB. Power must be linearly derated above 25°C ambient: for example, at 85°C ambient, max dissipation drops to 0.3 W. No heatsink is specified; thermal performance relies entirely on PCB copper area and layout.

Can the 2STR2230 replace the MMBT2907A in existing designs?

Direct replacement is not recommended without circuit validation. While both are SOT-23 PNP transistors, the 2STR2230 has significantly lower V_CE(sat) (–0.17 V vs –0.4 V) and higher h_FE (up to 560 vs 300), which may alter base drive requirements and thermal behavior. Layout compatibility exists, but electrical re-characterization is required.

Does the 2STR2230 support pulsed operation beyond its DC ratings?

Yes-the datasheet specifies I_CM = –3 A for pulse widths <5 ms (duty cycle ≤ 1.5%), validated under pulse test conditions (300 μs duration). This enables short-duration surge handling in battery protection or inrush limiting, provided average power remains within 0.5 W and junction temperature stays below 150°C.

2STR2230 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 1.5 A

Voltage - Collector Emitter Breakdown (Max):: 30 V

Vce Saturation (Max) @ Ib, Ic:: 800mV @ 200mA, 2A

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 170 @ 500mA, 2V

Power - Max:: 500 mW

Frequency - Transition:: 100MHz

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

2STR2230 FAQ

1.How can I place an order for 2STR2230 through Aetrix?

Please submit a Request for Quotation (RFQ) for 2STR2230 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 2STR2230 reliable?

The price and inventory of 2STR2230 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2STR2230 is usually 5 days.

3.What payment methods are accepted for 2STR2230?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2STR2230 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2STR2230?

2STR2230 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2STR2230 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 2STR2230?

For technical support, including 2STR2230 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2STR2230 requirements.

6.How does Aetrix verify that 2STR2230 is sourced from the original manufacturer or authorized distributors?

All 2STR2230 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 2STR2230 meets industry standards.

7.What is the process for return or replacement of 2STR2230?

All 2STR2230 units undergo pre-shipment inspection (PSI). If there is an issue with 2STR2230, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 2STR2230 part is unused and in its original packaging.

Return procedure for 2STR2230:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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