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

onsemi 2N4403_S00Z

Name: 2N4403_S00Z
Brand: onsemi
SKU: 2N4403_S00Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N4403_S00Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 (TO-226AA)

Datasheet:: 2N4403_S00Z.pdf

Description:: TRANS PNP 40V 0.6A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2N4403_S00Z from Fairchild Semiconductor is a PNP bipolar junction transistor (BJT) designed for general-purpose amplification and switching up to 600 mA collector current, with 40 V V_CEO, 5.0 V V_EBO, and 200 MHz f_T, commonly used in low-voltage logic interface and signal inversion circuits.

For engineers reviewing the 2N4403_S00Z datasheet, pinout, applications, or equivalent options, key selection considerations include its TO-92 package, PNP polarity, saturation voltage at 150 mA/15 mA drive, thermal resistance of 200 °C/W, and suitability for discrete amplifier stages and active-low switch configurations.

Technical Context

The 2N4403_S00Z operates as a medium-speed, medium-current PNP BJT optimized for linear amplification and saturated switching. Its h_FE ranges from 30 to 300 across 0.1–500 mA I_C, supporting both analog gain control and digital on/off operation.

Switching performance is characterized by t_d = 15 ns, t_r = 20 ns, t_s = 225 ns, and t_f = 30 ns under V_CC = 30 V, I_C = 150 mA, and I_B1 = I_B2 = 15 mA conditions - indicating moderate-speed switching with storage time dominating turn-off behavior.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Maximum allowable collector-emitter voltage before breakdown; sets upper rail limit in PNP switch or amplifier designs.
I_C (max)	600 mA - Continuous collector current rating; defines maximum load-handling capability in switching or Class-A amplifier use.
f_T	200 MHz - Current-gain bandwidth product; supports small-signal amplification up to ~100 MHz with usable gain.
V_CE(sat)	0.4 V @ I_C=150 mA, I_B=15 mA - Low saturation voltage enables efficient switching in low-dropout PNP emitter-follower or pull-up configurations.
R_θJA	200 °C/W - Junction-to-ambient thermal resistance in TO-92 package; limits power dissipation to ~625 mW at 25°C ambient.
h_FE range	30–300 - Wide DC current gain spread across operating currents; requires bias design margin for consistent performance.

Pinout & Package

2N4403_S00Z is housed in a through-hole TO-92 package with standard PNP pinout: Emitter (E), Base (B), Collector (C) - arranged left-to-right as E-B-C when viewing the flat side with leads downward.

Pin/Terminal	Circuit Role	Design Meaning
E (Emitter)	Current source terminal for PNP device	Connected to higher potential rail in common-emitter switches; sets reference for base drive and current sourcing path.
B (Base)	Control input for minority-carrier injection	Receives forward-biased current to enable conduction; requires current-limiting resistor in most digital interface applications.
C (Collector)	Output current sink terminal	Connected to load and lower-potential node; carries full load current when saturated; must withstand V_CEO during off-state.

Key Features

Feature	Design Value
General-purpose PNP BJT	Validated for both linear amplification (h_FE-based gain stages) and saturated switching (V_CE(sat) < 0.75 V) without special biasing.
Wide h_FE range	Supports robust circuit design across production lots: minimum h_FE = 30 at I_C = 0.1 mA ensures reliable turn-on even with low-base-drive margin.
High f_T	Enables RF-capable amplification up to 100 MHz with usable gain, suitable for IF stages and broadband signal conditioning.
Low V_BE(sat)	0.75 V @ I_C = 150 mA reduces base drive power and improves efficiency in high-duty-cycle switching.

Applications

Logic Level Shifting	Discrete Audio Preamp
Use Scenario: Converting TTL/CMOS high-side logic signals from 3.3 V or 5 V microcontrollers to drive higher-voltage loads or invert logic states. IC Role / Device Role / Timing Role: PNP switch configured in common-emitter mode to provide active-low output with rail-to-rail swing. Use Value: V_CEO = 40 V and I_C = 600 mA allow interfacing with 12 V or 24 V systems while maintaining fast edge response (t_r/t_f < 30 ns).	Use Scenario: Single-transistor preamplifier stage for electret microphone or line-level signal boosting in portable audio devices. IC Role / Device Role / Timing Role: Common-emitter amplifier biased for Class-A operation with emitter degeneration for stability. Use Value: h_FE ≥ 60 at I_C = 1 mA and f_T = 200 MHz support clean mid-band gain (20–20 kHz) with minimal distortion.
Relay Driver Circuit	Power Supply Enable Switch
Use Scenario: Driving coil current for electromechanical relays requiring 100–500 mA at 5–24 V supply rails. IC Role / Device Role / Timing Role: Saturated PNP switch controlling relay coil ground return path in high-side configuration. Use Value: V_CE(sat) ≤ 0.4 V minimizes power loss and self-heating; t_s = 225 ns allows predictable deactivation timing in time-critical control loops.	Use Scenario: Enabling/disabling downstream LDOs or DC-DC converters via microcontroller GPIO in battery-powered systems. IC Role / Device Role / Timing Role: High-side enable switch placed between input rail and converter VIN pin. Use Value: TJ range of –55°C to +150°C ensures reliability across automotive and industrial temperature environments; R_θJA = 200 °C/W supports continuous operation at 300 mW dissipation.

Logic Level Shifting

Discrete Audio Preamp

Use Scenario: Converting TTL/CMOS high-side logic signals from 3.3 V or 5 V microcontrollers to drive higher-voltage loads or invert logic states.

IC Role / Device Role / Timing Role: PNP switch configured in common-emitter mode to provide active-low output with rail-to-rail swing.

Use Value: V_CEO = 40 V and I_C = 600 mA allow interfacing with 12 V or 24 V systems while maintaining fast edge response (t_r/t_f < 30 ns).

Use Scenario: Single-transistor preamplifier stage for electret microphone or line-level signal boosting in portable audio devices.

IC Role / Device Role / Timing Role: Common-emitter amplifier biased for Class-A operation with emitter degeneration for stability.

Use Value: h_FE ≥ 60 at I_C = 1 mA and f_T = 200 MHz support clean mid-band gain (20–20 kHz) with minimal distortion.

Relay Driver Circuit

Power Supply Enable Switch

Use Scenario: Driving coil current for electromechanical relays requiring 100–500 mA at 5–24 V supply rails.

IC Role / Device Role / Timing Role: Saturated PNP switch controlling relay coil ground return path in high-side configuration.

Use Value: V_CE(sat) ≤ 0.4 V minimizes power loss and self-heating; t_s = 225 ns allows predictable deactivation timing in time-critical control loops.

Use Scenario: Enabling/disabling downstream LDOs or DC-DC converters via microcontroller GPIO in battery-powered systems.

IC Role / Device Role / Timing Role: High-side enable switch placed between input rail and converter VIN pin.

Use Value: TJ range of –55°C to +150°C ensures reliability across automotive and industrial temperature environments; R_θJA = 200 °C/W supports continuous operation at 300 mW dissipation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT4403	SOT-23 surface-mount variant; identical electrical specs but lower PD (350 mW) and higher R_θJA (357 °C/W).	Used where board space is constrained and reflow assembly is required; not drop-in compatible due to different package and thermal profile.	Select MMBT4403 only when footprint and assembly method require SMT; verify thermal derating in high-power operation.
2N3906	Lower I_C (200 mA), lower f_T (250 MHz typical but not guaranteed), and tighter h_FE range (100–300); same TO-92 package.	Better suited for low-current signal switching and bias networks; less appropriate for >300 mA load switching.	Choose 2N3906 for precision biasing or low-power logic inversion; avoid for 500 mA relay drivers or high-current amplifiers.

Compared with MMBT4403 and 2N3906, the 2N4403_S00Z offers superior continuous current handling (600 mA vs. 300 mA and 200 mA), higher thermal margin in through-hole layout, and broader h_FE tolerance - making it preferred for robust, medium-power PNP switching where manual assembly or serviceability matters.

Availability

2N4403_S00Z is available at Aetrix Electronics and suitable for relay driver circuits, discrete audio preamplifiers, and logic-level shifting applications requiring stable component supply and long-term obsolescence management.

Supply support for 2N4403_S00Z 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The 2N4403_S00Z belongs to Fairchild's legacy general-purpose BJT family, engineered for cost-effective, reliable amplification and switching in consumer, industrial, and automotive auxiliary systems.

FAQ

What is the maximum collector current rating for the 2N4403_S00Z?

The 2N4403_S00Z has a maximum continuous collector current (I_C) rating of 600 mA at T_A = 25°C. This rating assumes proper heatsinking and derating above 25°C per the 5.0 mW/°C thermal derating curve. At elevated ambient temperatures or pulsed operation, actual usable current must be reduced to maintain junction temperature below 150°C - the absolute maximum specified in the datasheet.

Is the 2N4403_S00Z pin-compatible with the MMBT4403?

No, the 2N4403_S00Z is not pin-compatible with the MMBT4403. While both share identical electrical specifications and PNP polarity, the 2N4403_S00Z uses a TO-92 through-hole package with E-B-C pinout (flat side facing viewer, leads down), whereas the MMBT4403 uses an SOT-23 surface-mount package with C-B-E pinout. PCB layout, soldering process, and thermal management differ significantly between the two.

What is the typical DC current gain (h_FE) of the 2N4403_S00Z at 10 mA collector current?

At I_C = 10 mA and V_CE = 1.0 V, the 2N4403_S00Z exhibits a minimum h_FE of 100 and a typical value near 200. The datasheet specifies h_FE = 100–300 in this condition, confirming strong current amplification capability suitable for driving moderate loads without excessive base current demand.

Can the 2N4403_S00Z be used in high-frequency amplifier applications?

Yes, the 2N4403_S00Z supports high-frequency small-signal amplification with a current-gain bandwidth product (f_T) of 200 MHz. It is suitable for IF amplifiers, broadband preamps, and RF detector stages up to ~100 MHz where moderate gain and low noise are required - though its f_T is not characterized for narrowband RF power amplification above 200 MHz.

What is the storage temperature range for the 2N4403_S00Z?

The 2N4403_S00Z has a specified storage temperature range (T_stg) of –55°C to +150°C, matching its operating junction temperature range. This wide range supports long-term storage in uncontrolled environments and compatibility with industrial and automotive-grade logistics, provided humidity and contamination controls are maintained per J-STD-033 guidelines.

2N4403_S00Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA)

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 600 mA

Voltage - Collector Emitter Breakdown (Max):: 40 V

Vce Saturation (Max) @ Ib, Ic:: 750mV @ 50mA, 500mA

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 2V

Power - Max:: 625 mW

Frequency - Transition:: 200MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

2N4403_S00Z FAQ

1.How can I place an order for 2N4403_S00Z through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N4403_S00Z 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 2N4403_S00Z reliable?

The price and inventory of 2N4403_S00Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N4403_S00Z is usually 5 days.

3.What payment methods are accepted for 2N4403_S00Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N4403_S00Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N4403_S00Z?

2N4403_S00Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N4403_S00Z 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 2N4403_S00Z?

For technical support, including 2N4403_S00Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N4403_S00Z requirements.

6.How does Aetrix verify that 2N4403_S00Z is sourced from the original manufacturer or authorized distributors?

All 2N4403_S00Z 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 2N4403_S00Z meets industry standards.

7.What is the process for return or replacement of 2N4403_S00Z?

All 2N4403_S00Z units undergo pre-shipment inspection (PSI). If there is an issue with 2N4403_S00Z, 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 2N4403_S00Z part is unused and in its original packaging.

Return procedure for 2N4403_S00Z:

1.Submit a request within 90 days.

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

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