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

onsemi 2N3906_J05Z

Name: 2N3906_J05Z
Brand: onsemi
SKU: 2N3906_J05Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N3906_J05Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2N3906_J05Z.pdf

Description:: TRANS PNP 40V 0.2A TO-92-3

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Product details

Overview

2N3906_J05Z from onsemi is a PNP bipolar junction transistor (BJT) designed for general-purpose amplification and switching at collector currents from 10 mA to 100 mA. It features V_CEO = −40 V, I_C = −200 mA continuous, h_FE = 100 (at I_C = −10 mA), V_CE(sat) = −0.25 V (at I_C = −10 mA, I_B = −1.0 mA), and TO-92 package with E-B-C pinout - commonly used in discrete logic inverters, level shifters, and low-power load switches.

For engineers reviewing the 2N3906_J05Z datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, TO-92 mechanical compatibility, guaranteed h_FE ≥ 100 at 10 mA, −40 V breakdown rating, and thermal resistance R_θJA = 200 °C/W under standard FR-4 mounting conditions.

Technical Context

The 2N3906_J05Z operates as a silicon PNP BJT with fixed emitter-base and collector-base junctions optimized for linear amplification and saturated switching. Its DC current gain (h_FE) varies predictably with collector current: 80 at −1.0 mA, 100 at −10 mA, and drops to 60 at −50 mA - indicating intentional design for mid-current bias stability.

Switching performance is characterized by t_d = 35 ns, t_r = 35 ns, t_s = 225 ns, and t_f = 75 ns under V_CC = −3.0 V, enabling reliable operation in sub-100 kHz digital logic and pulse-width modulation circuits where storage time dominates turn-off behavior.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40 V: Maximum reverse-biased collector-emitter voltage before breakdown; defines safe operating range in common-emitter switching.
I_C (max)	−200 mA: Absolute maximum continuous collector current; usable up to −100 mA per datasheet typical applications.
h_FE	100 @ I_C = −10 mA: Confirmed DC current gain ensures predictable base drive requirements for saturation in switch designs.
V_CE(sat)	−0.25 V @ I_C = −10 mA, I_B = −1.0 mA: Low saturation voltage minimizes power loss and heat generation in active-low switch configurations.
f_T	250 MHz: Current gain–bandwidth product supports small-signal amplification up to RF front-end stages below 50 MHz.
R_θJA	200 °C/W: Thermal resistance from junction to ambient on standard FR-4 PCB; enables ~312 mW max dissipation at T_A = 70°C.

Pinout & Package

2N3906_J05Z uses the TO-92 package (JEDEC TO-92 compliant, straight lead configuration per Figure 16), with molded plastic body, 3 leads, and standard E-B-C pinout when viewed with flat side facing user and leads downward: Emitter (lead 1), Base (lead 2), Collector (lead 3).

Pin/Terminal	Circuit Role	Design Meaning
Lead 1	Emitter	Current exit terminal in PNP operation; connected to higher potential rail in common-emitter switch layouts.
Lead 2	Base	Control input requiring negative base current relative to emitter to forward-bias BE junction and enable conduction.
Lead 3	Collector	Current entry terminal; tied to load and supply rail in high-side switch configurations or pulled low in open-collector outputs.

Key Features

Feature	Design Value
PNP polarity with −40 V V_CEO	Enables high-side switching and complementary pairing with NPN 2N3904 in push-pull output stages.
h_FE ≥ 100 at I_C = −10 mA	Reduces required base drive current and simplifies bias network design in amplifier and switch applications.
V_CE(sat) ≤ −0.25 V at moderate load	Limits conduction loss to <1.5 mW at 10 mA load, supporting thermally constrained PCB layouts.
TO-92 through-hole package	Provides mechanical robustness, hand-solderability, and compatibility with legacy prototyping and industrial control boards.

Applications

Discrete Logic Inverter	Low-Voltage Level Shifter
Use Scenario: Converting TTL/CMOS logic-high (3.3 V or 5 V) to active-low output in microcontroller peripheral interfaces. IC Role / Device Role / Timing Role: PNP switch configured in common-emitter mode, driven by GPIO to sink current when high. Use Value: V_CE(sat) ≤ −0.25 V ensures output remains within valid logic-low range (<0.4 V) while driving 10 mA loads.	Use Scenario: Translating 1.8 V I²C bus signals to 3.3 V domain without active translators. IC Role / Device Role / Timing Role: PNP-based bidirectional level shifter using open-drain pull-up topology. Use Value: Verified f_T = 250 MHz and low C_ibo = 10 pF support rise/fall times compatible with 400 kHz I²C Fast Mode.
High-Side Load Switch	Analog Signal Amplifier
Use Scenario: Controlling 12 V solenoid or LED string from MCU GPIO with ground-referenced control signal. IC Role / Device Role / Timing Role: PNP configured as emitter-follower or common-emitter high-side switch. Use Value: V_CEO = −40 V and I_C = −200 mA allow safe operation with 12 V loads drawing up to 100 mA.	Use Scenario: DC-coupled preamplifier stage for sensor signals in industrial monitoring systems. IC Role / Device Role / Timing Role: Common-emitter amplifier with fixed bias, delivering voltage gain >50 at 1 kHz. Use Value: h_FE = 100 at I_C = −10 mA and NF = 4.0 dB (10 Hz–15.7 kHz) ensure stable gain and low-noise analog conditioning.

Discrete Logic Inverter

Low-Voltage Level Shifter

Use Scenario: Converting TTL/CMOS logic-high (3.3 V or 5 V) to active-low output in microcontroller peripheral interfaces.

IC Role / Device Role / Timing Role: PNP switch configured in common-emitter mode, driven by GPIO to sink current when high.

Use Value: V_CE(sat) ≤ −0.25 V ensures output remains within valid logic-low range (<0.4 V) while driving 10 mA loads.

Use Scenario: Translating 1.8 V I²C bus signals to 3.3 V domain without active translators.

IC Role / Device Role / Timing Role: PNP-based bidirectional level shifter using open-drain pull-up topology.

Use Value: Verified f_T = 250 MHz and low C_ibo = 10 pF support rise/fall times compatible with 400 kHz I²C Fast Mode.

High-Side Load Switch

Analog Signal Amplifier

Use Scenario: Controlling 12 V solenoid or LED string from MCU GPIO with ground-referenced control signal.

IC Role / Device Role / Timing Role: PNP configured as emitter-follower or common-emitter high-side switch.

Use Value: V_CEO = −40 V and I_C = −200 mA allow safe operation with 12 V loads drawing up to 100 mA.

Use Scenario: DC-coupled preamplifier stage for sensor signals in industrial monitoring systems.

IC Role / Device Role / Timing Role: Common-emitter amplifier with fixed bias, delivering voltage gain >50 at 1 kHz.

Use Value: h_FE = 100 at I_C = −10 mA and NF = 4.0 dB (10 Hz–15.7 kHz) ensure stable gain and low-noise analog conditioning.

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
MMBT3906	SOT-23 surface-mount package; lower P_D = 350 mW; R_θJA = 357 °C/W; same electrical specs.	Required for space-constrained PCBs; unsuitable for >60 mA continuous due to thermal limits.	Select MMBT3906 only when board area is critical and thermal management via copper pour or airflow is assured.
PZT3906	SOT-223-4L package; higher P_D = 1000 mW; R_θJA = 125 °C/W; includes exposed thermal pad.	Supports sustained 200 mA operation; requires 4-pin footprint and thermal pad soldering.	Choose PZT3906 for high-current or thermally demanding environments where TO-92 cannot meet derating requirements.

Compared with MMBT3906 and PZT3906, the 2N3906_J05Z delivers identical electrical performance in a through-hole TO-92 package optimized for manual assembly, prototyping, and legacy industrial controls - offering superior thermal margin over SOT-23 and simpler layout than SOT-223 while maintaining full functional equivalence.

Availability

2N3906_J05Z is available at Aetrix Electronics and suitable for discrete logic inverters, high-side load switches, and low-voltage level shifters requiring stable component supply across industrial control, test equipment, and educational electronics programs.

Supply support for 2N3906_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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The 2N3906_J05Z belongs to onsemi's legacy general-purpose transistor family, engineered for reliability, consistency, and broad compatibility in discrete analog and digital circuit design across decades of industrial deployment.

FAQ

What is the pin configuration of the 2N3906_J05Z?

The 2N3906_J05Z uses the standard TO-92 package with Emitter–Base–Collector (E-B-C) pinout: when viewing the flat side of the package with leads pointing downward, Lead 1 is Emitter, Lead 2 is Base, and Lead 3 is Collector. This matches JEDEC TO-92 specification and is confirmed in onsemi's Figure 16 and Figure 17 package drawings.

Does the 2N3906_J05Z support switching applications?

Yes, the 2N3906_J05Z is explicitly rated for switching use, with documented delay time (t_d) = 35 ns, rise time (t_r) = 35 ns, storage time (t_s) = 225 ns, and fall time (t_f) = 75 ns at V_CC = −3.0 V and I_C = −10 mA. These values confirm suitability for digital logic interfacing and PWM-driven loads up to ~100 kHz.

What is the maximum power dissipation of the 2N3906_J05Z?

The 2N3906_J05Z has a total device dissipation (P_D) of 625 mW at T_A = 25°C, with a derating factor of 5.0 mW/°C above that temperature. On a standard FR-4 PCB (1.6″ × 1.6″), its R_θJA = 200 °C/W limits practical continuous dissipation to ~312 mW at 70°C ambient - sufficient for most low-power switching and amplification tasks.

Is the 2N3906_J05Z RoHS compliant?

Yes, the 2N3906_J05Z is RoHS compliant and halogen-free, consistent with onsemi's global environmental policy and compliance documentation referenced in the PZT3906/D datasheet revision history and packaging information. All TO-92 variants (including J05Z) meet EU Directive 2011/65/EU requirements.

How does the 2N3906_J05Z compare to the 2N3904?

The 2N3906_J05Z is the complementary PNP counterpart to the NPN 2N3904, sharing identical package options, absolute maximum ratings (except polarity), and similar gain/bandwidth characteristics. While the 2N3904 sources current from collector, the 2N3906_J05Z sinks it - enabling matched pair usage in differential amplifiers, push-pull drivers, and H-bridge control logic.

2N3906_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):: 200 mA

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

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 5mA, 50mA

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 10mA, 1V

Power - Max:: 625 mW

Frequency - Transition:: 250MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

2N3906_J05Z FAQ

1.How can I place an order for 2N3906_J05Z through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N3906_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 2N3906_J05Z reliable?

The price and inventory of 2N3906_J05Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N3906_J05Z is usually 5 days.

3.What payment methods are accepted for 2N3906_J05Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N3906_J05Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N3906_J05Z?

2N3906_J05Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N3906_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 2N3906_J05Z?

For technical support, including 2N3906_J05Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N3906_J05Z requirements.

6.How does Aetrix verify that 2N3906_J05Z is sourced from the original manufacturer or authorized distributors?

All 2N3906_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 2N3906_J05Z meets industry standards.

7.What is the process for return or replacement of 2N3906_J05Z?

All 2N3906_J05Z units undergo pre-shipment inspection (PSI). If there is an issue with 2N3906_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 2N3906_J05Z part is unused and in its original packaging.

Return procedure for 2N3906_J05Z:

1.Submit a request within 90 days.

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

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