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

onsemi 2N5366_D75Z

Name: 2N5366_D75Z
Brand: onsemi
SKU: 2N5366_D75Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N5366_D75Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2N5366_D75Z.pdf

Description:: TRANS PNP 40V 0.5A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2N5366_D75Z from Fairchild Semiconductor is a PNP general-purpose amplifier transistor in TO-92 package, rated for V_CEO = 40 V, I_C = 500 mA continuous, and operating from –55 °C to +150 °C; used in low-frequency amplification and switching circuits in industrial power supplies and signal conditioning stages.

For engineers reviewing the 2N5366_D75Z datasheet, pinout, applications, or equivalent options, key selection criteria include DC current gain (h_FE = 80–300), saturation voltage (V_CE(sat) = 0.25 V @ 50 mA), thermal resistance (R_θJA = 200 °C/W), and TO-92 mechanical compatibility.

Technical Context

This PNP bipolar junction transistor operates with base-emitter forward bias enabling collector current control up to 300 mA in active or saturated modes. Its breakdown ratings (V_CEO, V_CBO, V_EBO) are all specified at defined leakage currents (10 µA–10 mA), confirming suitability for medium-voltage linear and switching applications.

Thermal design is constrained by R_θJA = 200 °C/W and P_D = 625 mW at 25 °C, with 5.0 mW/°C derating above ambient - requiring heatsinking or airflow for sustained >200 mA operation. Small-signal gain h_fe ranges 80–450 at 1 MHz, supporting audio and low-speed control amplification.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Maximum allowable collector-emitter voltage before breakdown under open-base condition; defines safe operating voltage headroom.
I_C (continuous)	500 mA - Absolute maximum DC collector current; actual usable current limited by thermal dissipation and V_CE(sat).
h_FE	80–300 - DC current gain range across test conditions (V_CE = 1–10 V, I_C = 2–300 mA); determines required base drive for target collector current.
V_CE(sat)	0.25 V @ 50 mA / 1.0 V @ 300 mA - Low saturation voltage enables efficient switching in low-dropout regulator and driver stages.
R_θJA	200 °C/W - Junction-to-ambient thermal resistance in free-air; dictates temperature rise per watt of dissipated power without heatsink.
f_T	Not specified - No transition frequency value provided in source documentation; device intended for DC/low-frequency use only.

Pinout & Package

2N5366_D75Z is housed in a standard TO-92 plastic package with lead spacing matching JEDEC TO-92 outline. Pin assignment is fixed: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base - verified per Fairchild's official package drawing and marking diagram.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Emitter	Current exit terminal for PNP operation; connects to higher-potential rail in common-emitter configurations.
Pin 2	Collector	Current entry terminal; typically tied to load or supply return path depending on topology.
Pin 3	Base	Control terminal; requires ~0.7 V forward bias relative to emitter to initiate conduction.

Key Features

Feature	Design Value
PNP polarity with 40 V breakdown	Enables high-side switching and complementary designs where NPN alternatives require level-shifting.
DC current gain (h_FE) up to 300	Reduces required base drive current in linear amplifier stages, easing microcontroller GPIO sourcing requirements.
V_CE(sat) ≤ 1.0 V at 300 mA	Minimizes conduction loss in power-switching applications such as relay drivers and LED current sinks.
TO-92 package with 200 °C/W R_θJA	Supports cost-sensitive, space-constrained PCB layouts while permitting moderate power handling with natural convection cooling.

Applications

Audio Amplifier Stage	Relay Driver Circuit
Use Scenario: Low-voltage, low-power audio preamplifier stage in battery-operated intercom systems. IC Role / Device Role / Timing Role: PNP transistor configured in common-emitter mode to provide voltage and current gain for microphone-level signals. Use Value: h_FE ≥ 80 ensures sufficient gain at 2 mA bias; V_CE(sat) < 0.3 V minimizes distortion near signal zero-crossings.	Use Scenario: Solid-state replacement for electromechanical relays controlling 24 V DC solenoids in HVAC control panels. IC Role / Device Role / Timing Role: Switching element driving relay coil with base-controlled turn-on/turn-off. Use Value: 40 V V_CEO provides margin over 24 V supply; 500 mA I_C rating supports typical 40–100 mA coil currents with safety headroom.
Linear Voltage Regulator Pass Element	Current Sink for LED Biasing
Use Scenario: Series pass transistor in adjustable 3-terminal linear regulator delivering up to 300 mA output. IC Role / Device Role / Timing Role: Active-pass element regulating output voltage via feedback-controlled base current. Use Value: Continuous I_C = 500 mA and R_θJA = 200 °C/W allow stable operation at 1–2 W dissipation with minimal heatsinking.	Use Scenario: Constant-current sink for multi-segment indicator LEDs in industrial HMI panels. IC Role / Device Role / Timing Role: Emitter-follower configured current limiter setting precise LED current independent of supply variation. Use Value: h_FE consistency across batches ensures repeatable current regulation; V_BE(on) = 0.5–0.8 V simplifies reference resistor calculation.

Audio Amplifier Stage

Relay Driver Circuit

Use Scenario: Low-voltage, low-power audio preamplifier stage in battery-operated intercom systems.

IC Role / Device Role / Timing Role: PNP transistor configured in common-emitter mode to provide voltage and current gain for microphone-level signals.

Use Value: h_FE ≥ 80 ensures sufficient gain at 2 mA bias; V_CE(sat) < 0.3 V minimizes distortion near signal zero-crossings.

Use Scenario: Solid-state replacement for electromechanical relays controlling 24 V DC solenoids in HVAC control panels.

IC Role / Device Role / Timing Role: Switching element driving relay coil with base-controlled turn-on/turn-off.

Use Value: 40 V V_CEO provides margin over 24 V supply; 500 mA I_C rating supports typical 40–100 mA coil currents with safety headroom.

Linear Voltage Regulator Pass Element

Current Sink for LED Biasing

Use Scenario: Series pass transistor in adjustable 3-terminal linear regulator delivering up to 300 mA output.

IC Role / Device Role / Timing Role: Active-pass element regulating output voltage via feedback-controlled base current.

Use Value: Continuous I_C = 500 mA and R_θJA = 200 °C/W allow stable operation at 1–2 W dissipation with minimal heatsinking.

Use Scenario: Constant-current sink for multi-segment indicator LEDs in industrial HMI panels.

IC Role / Device Role / Timing Role: Emitter-follower configured current limiter setting precise LED current independent of supply variation.

Use Value: h_FE consistency across batches ensures repeatable current regulation; V_BE(on) = 0.5–0.8 V simplifies reference resistor calculation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPSA92	V_CEO = 300 V, h_FE = 25–200, TO-92 package	Higher voltage rating but lower gain and wider h_FE spread; suited for high-voltage switching, not low-noise amplification	Select when V_CEO > 40 V is mandatory; avoid if tight gain matching or low-V_CE(sat) is required.
BC557	V_CEO = 45 V, I_C = 100 mA, h_FE = 110–800, TO-92	Lower current capability and higher h_FE variability; optimized for small-signal amplification, not power switching	Prefer for low-current, high-gain audio stages; unsuitable for >100 mA load switching due to I_C limit.

Compared with MPSA92 and BC557, the 2N5366_D75Z offers balanced performance: mid-range voltage (40 V), robust current (500 mA), and predictable h_FE behavior - making it optimal for general-purpose amplification and switching where both power handling and gain stability matter.

Availability

2N5366_D75Z is available at Aetrix Electronics and suitable for industrial power supplies, analog signal conditioning circuits, and electro-mechanical interface modules requiring stable component supply and long-term manufacturability.

Supply support for 2N5366_D75Z 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 2N5366_D75Z belongs to Fairchild's legacy general-purpose bipolar transistor product line, designed specifically for cost-effective, reliable amplification and switching in industrial and consumer equipment operating below 100 kHz.

FAQ

What is the pin configuration of the 2N5366_D75Z?

The 2N5366_D75Z uses a standard TO-92 package with fixed pinout: Pin 1 is Emitter, Pin 2 is Collector, and Pin 3 is Base. This arrangement is confirmed in Fairchild's original datasheet Rev. A1 and matches JEDEC TO-92 mechanical specifications. No alternate pinouts exist for this part number.

Does the 2N5366_D75Z support switching applications?

Yes, the 2N5366_D75Z supports switching applications due to its V_CE(sat) of 0.25 V at 50 mA and 1.0 V at 300 mA, along with fast enough turn-on/off characteristics for low-frequency (<10 kHz) digital control. It is commonly used in relay drivers and LED current sinks where speed is not critical.

What is the maximum power dissipation for the 2N5366_D75Z?

The 2N5366_D75Z has a total device dissipation (P_D) of 625 mW at 25 °C ambient, derated by 5.0 mW/°C above that temperature. At 75 °C ambient, maximum allowable dissipation drops to 375 mW - requiring thermal analysis or heatsinking for sustained high-current operation.

Is the 2N5366_D75Z RoHS compliant?

The 2N5366_D75Z was manufactured prior to RoHS enforcement timelines (pre-2006) and does not carry formal RoHS certification. For new designs requiring compliance, consult Aetrix Electronics for qualified drop-in alternatives or re-engineered equivalents meeting current environmental standards.

Can the 2N5366_D75Z replace an NPN transistor in a circuit?

No - the 2N5366_D75Z is a PNP transistor and cannot directly replace an NPN device without reversing supply polarity and redesigning bias networks. Its complementary NPN counterpart is the 2N5365; substitution requires full circuit reanalysis including current direction, voltage references, and drive logic inversion.

2N5366_D75Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 500 mA

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

Vce Saturation (Max) @ Ib, Ic:: 1V @ 30mA, 300mA

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 50mA, 1V

Power - Max:: 625 mW

Frequency - Transition:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

2N5366_D75Z FAQ

1.How can I place an order for 2N5366_D75Z through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N5366_D75Z 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 2N5366_D75Z reliable?

The price and inventory of 2N5366_D75Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N5366_D75Z is usually 5 days.

3.What payment methods are accepted for 2N5366_D75Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N5366_D75Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N5366_D75Z?

2N5366_D75Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N5366_D75Z 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 2N5366_D75Z?

For technical support, including 2N5366_D75Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N5366_D75Z requirements.

6.How does Aetrix verify that 2N5366_D75Z is sourced from the original manufacturer or authorized distributors?

All 2N5366_D75Z 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 2N5366_D75Z meets industry standards.

7.What is the process for return or replacement of 2N5366_D75Z?

All 2N5366_D75Z units undergo pre-shipment inspection (PSI). If there is an issue with 2N5366_D75Z, 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 2N5366_D75Z part is unused and in its original packaging.

Return procedure for 2N5366_D75Z:

1.Submit a request within 90 days.

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

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