Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi 2N4403_J05Z

Name: 2N4403_J05Z
Brand: onsemi
SKU: 2N4403_J05Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 2N4403_J05Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2N4403_J05Z.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,052

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

2N4403_J05Z from Fairchild Semiconductor is a PNP bipolar junction transistor (BJT) designed for general-purpose amplification and switching up to 500 mA collector current, with V_CEO = 40 V, V_BE(sat) = 0.75 V at I_C = 150 mA, and f_T = 200 MHz - used in discrete logic-level interface circuits and low-power load switching.

For engineers reviewing the 2N4403_J05Z datasheet, pinout, applications, or equivalent options, key selection considerations include its TO-92 package thermal resistance (R_θJA = 200 °C/W), guaranteed h_FE ≥ 30 at I_C = 0.1 mA, and verified switching times (t_d = 15 ns, t_f = 30 ns) under standard test conditions.

Technical Context

The 2N4403_J05Z operates as a medium-speed, medium-current PNP switch or small-signal amplifier with DC current gain (h_FE) ranging from 30 to 300 across I_C = 0.1–500 mA, and exhibits predictable saturation behavior (V_CE(sat) ≤ 0.4 V at β = 10). Its f_T = 200 MHz enables stable operation in audio-frequency amplifiers and digital edge-triggered circuits.

Thermal design relies on its TO-92 package's R_θJA = 200 °C/W and maximum power dissipation of 625 mW at T_A = 25 °C, derating linearly by 5.0 mW/°C above ambient - validated for continuous operation from –55 °C to +150 °C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Maximum safe collector-emitter voltage before breakdown; defines rail compatibility in 3.3 V/5 V/12 V switching stages.
I_C (max)	600 mA - Absolute maximum continuous collector current; supports robust switching of relays, LEDs, and small solenoids.
h_FE	30–300 - DC current gain range across operating currents; enables predictable base drive sizing for saturation or linear-mode biasing.
f_T	200 MHz - Unity-gain bandwidth; ensures stable small-signal amplification up to mid-audio frequencies without phase inversion.
t_f	30 ns - Fall time at I_C = 150 mA, I_B1 = I_B2 = 15 mA; confirms suitability for 10–20 MHz digital signal routing and pulse shaping.
R_θJA	200 °C/W - Junction-to-ambient thermal resistance on standard FR-4; determines required heatsinking for >300 mW continuous dissipation.

Pinout & Package

2N4403_J05Z is housed in a through-hole TO-92 package with standardized lead configuration: Emitter (E), Base (B), Collector (C) arranged left-to-right when viewing the flat side with leads downward.

Pin/Terminal	Circuit Role	Design Meaning
E (Emitter)	Current source terminal in PNP operation	Connected to higher potential rail; base-emitter forward bias initiates conduction.
B (Base)	Control input for minority-carrier injection	Receives negative-going current to turn device ON; requires current-limiting resistor per h_FE and I_C.
C (Collector)	Current sink terminal	Connected to load and lower-potential node; carries full switched current with minimal V_CE(sat) drop.

Key Features

Feature	Design Value
Guaranteed h_FE ≥ 30 at I_C = 0.1 mA	Enables reliable low-current switching in battery-powered sensor interfaces without gain uncertainty.
V_CE(sat) ≤ 0.4 V at I_C = 150 mA, I_B = 15 mA	Minimizes conduction loss in high-duty-cycle switching applications such as LED drivers and level shifters.
Switching speed (t_s = 225 ns)	Supports clean turn-off in pulse-width modulated (PWM) control of resistive and inductive loads.
–55 °C to +150 °C operating range	Validated for use in automotive under-hood modules and industrial control cabinets without derating.

Applications

LED Driver Circuit	Microcontroller Level Shifter
Use Scenario: Driving 20–100 mA indicator LEDs from 3.3 V or 5 V microcontroller GPIO pins. IC Role / Device Role / Timing Role: PNP switch sinking current from LED anode to V_CC, enabling active-high logic control with inverted output polarity. Use Value: Low V_CE(sat) (≤0.4 V) preserves LED forward voltage margin; h_FE ≥ 100 at I_C = 20 mA simplifies base resistor selection.	Use Scenario: Translating 1.8 V or 3.3 V logic outputs to 5 V or 12 V domains in mixed-voltage systems. IC Role / Device Role / Timing Role: Discrete PNP-based level translator providing bidirectional or unidirectional voltage translation with no external bias supply. Use Value: Verified t_r/t_f < 25 ns ensures timing compliance for SPI/I²C clock rates up to 10 MHz.
Relay Driver Stage	Audio Pre-amplifier Input Stage
Use Scenario: Switching 5–24 V relay coils drawing 40–200 mA in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Medium-current PNP driver stage isolating microcontroller outputs from inductive coil back-EMF. Use Value: V_CEO = 40 V withstands flyback transients; R_θJA = 200 °C/W allows continuous duty at 150 mA without heatsink.	Use Scenario: First-stage amplification of microphone or piezoelectric sensor signals in portable audio recorders. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier configured for 20–20 kHz bandwidth with fixed bias network. Use Value: f_T = 200 MHz provides ample gain-margin; C_cb = 8.5 pF minimizes Miller-effect distortion at midband frequencies.

LED Driver Circuit

Microcontroller Level Shifter

Use Scenario: Driving 20–100 mA indicator LEDs from 3.3 V or 5 V microcontroller GPIO pins.

IC Role / Device Role / Timing Role: PNP switch sinking current from LED anode to V_CC, enabling active-high logic control with inverted output polarity.

Use Value: Low V_CE(sat) (≤0.4 V) preserves LED forward voltage margin; h_FE ≥ 100 at I_C = 20 mA simplifies base resistor selection.

Use Scenario: Translating 1.8 V or 3.3 V logic outputs to 5 V or 12 V domains in mixed-voltage systems.

IC Role / Device Role / Timing Role: Discrete PNP-based level translator providing bidirectional or unidirectional voltage translation with no external bias supply.

Use Value: Verified t_r/t_f < 25 ns ensures timing compliance for SPI/I²C clock rates up to 10 MHz.

Relay Driver Stage

Audio Pre-amplifier Input Stage

Use Scenario: Switching 5–24 V relay coils drawing 40–200 mA in industrial PLC I/O modules.

IC Role / Device Role / Timing Role: Medium-current PNP driver stage isolating microcontroller outputs from inductive coil back-EMF.

Use Value: V_CEO = 40 V withstands flyback transients; R_θJA = 200 °C/W allows continuous duty at 150 mA without heatsink.

Use Scenario: First-stage amplification of microphone or piezoelectric sensor signals in portable audio recorders.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier configured for 20–20 kHz bandwidth with fixed bias network.

Use Value: f_T = 200 MHz provides ample gain-margin; C_cb = 8.5 pF minimizes Miller-effect distortion at midband frequencies.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP general-purpose amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT4403	SOT-23 surface-mount package; R_θJA = 357 °C/W; P_D = 350 mW; identical electrical specs.	Requires PCB re-layout for SMT assembly; unsuitable for prototyping on breadboards or through-hole boards.	Select MMBT4403 only when board space constraints mandate SMT and thermal budget permits higher junction rise.
2N3906	Lower I_C (200 mA max); lower f_T (250 MHz typical but not guaranteed); V_CEO = 40 V same.	Not recommended for >200 mA switching; insufficient gain stability at 500 mA for relay driving.	Choose 2N3906 only for low-current (<100 mA), high-frequency small-signal amplification where footprint matches TO-92.

Compared with MMBT4403 and 2N3906, the 2N4403_J05Z uniquely balances through-hole manufacturability, 600 mA absolute I_C rating, and verified 200 MHz f_T - making it optimal for production-grade discrete switching where layout flexibility and thermal headroom are critical.

Availability

2N4403_J05Z is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller level shifters, and relay driver stages requiring stable component supply and long-term obsolescence management.

Supply support for 2N4403_J05Z 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_J05Z belongs to Fairchild's legacy general-purpose BJT family, engineered for cost-sensitive, high-reliability discrete switching and amplification in industrial controls, consumer electronics, and automotive subsystems.

FAQ

What is the maximum continuous collector current rating for the 2N4403_J05Z?

The 2N4403_J05Z has an absolute maximum continuous collector current (I_C) rating of 600 mA, as specified in its Absolute Maximum Ratings table. This value is valid at T_A = 25 °C with proper heat dissipation; actual usable current depends on ambient temperature, PCB copper area, and duty cycle. For sustained 500 mA operation, ensure junction temperature remains ≤150 °C using the R_θJA = 200 °C/W thermal metric.

Is the 2N4403_J05Z pin-compatible with the 2N3906?

No, the 2N4403_J05Z is not pin-compatible with the 2N3906. While both are TO-92 packaged PNP transistors, their pinouts differ: 2N4403_J05Z uses E-B-C (left-to-right, flat side facing), whereas 2N3906 uses E-C-B. Swapping them without verifying pin alignment will cause circuit failure. Always consult the respective datasheets before substitution.

What is the typical current gain (h_FE) of the 2N4403_J05Z at 10 mA collector current?

At I_C = 10 mA and V_CE = 1.0 V, the 2N4403_J05Z exhibits a typical h_FE of 100, with a guaranteed minimum of 60 per its Electrical Characteristics table. This gain value is stable across –40 °C to +125 °C ambient, supporting consistent base drive design in temperature-varying environments like automotive cabin modules.

Does the 2N4403_J05Z support switching applications above 1 MHz?

Yes - the 2N4403_J05Z supports switching applications up to approximately 10 MHz due to its f_T = 200 MHz and measured t_r/t_f of 20/30 ns. However, effective switching speed depends on external base drive strength and load capacitance. For reliable >5 MHz operation, use low-impedance base drive (≤1 kΩ) and minimize parasitic capacitance in PCB layout.

What is the thermal resistance (R_θJA) of the 2N4403_J05Z in free air?

The 2N4403_J05Z has a junction-to-ambient thermal resistance (R_θJA) of 200 °C/W when mounted on a standard FR-4 PCB with no added copper pour or heatsink. This value assumes natural convection cooling in still air; adding 1 in² of 2-oz copper connected to the collector lead reduces R_θJA by ~30–40 °C/W, directly improving power handling capability.

2N4403_J05Z 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_J05Z FAQ

1.How can I place an order for 2N4403_J05Z through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N4403_J05Z 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_J05Z reliable?

The price and inventory of 2N4403_J05Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N4403_J05Z is usually 5 days.

3.What payment methods are accepted for 2N4403_J05Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N4403_J05Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N4403_J05Z?

2N4403_J05Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N4403_J05Z 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_J05Z?

For technical support, including 2N4403_J05Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N4403_J05Z requirements.

6.How does Aetrix verify that 2N4403_J05Z is sourced from the original manufacturer or authorized distributors?

All 2N4403_J05Z 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_J05Z meets industry standards.

7.What is the process for return or replacement of 2N4403_J05Z?

All 2N4403_J05Z units undergo pre-shipment inspection (PSI). If there is an issue with 2N4403_J05Z, 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_J05Z part is unused and in its original packaging.

Return procedure for 2N4403_J05Z:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…