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

onsemi 2N5366

Name: 2N5366
Brand: onsemi
SKU: 2N5366
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N5366

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2N5366.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2N5366 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 h_FE = 80–300 at I_C = 2–300 mA, used in low-frequency signal amplification and switching circuits in consumer power supplies and industrial control interfaces.

For engineers reviewing the 2N5366 datasheet, pinout, applications, or equivalent options, key selection considerations include its PNP polarity, TO-92 mechanical compatibility, DC current gain variation across operating current range, saturation voltage at high drive conditions, and thermal derating above 25°C.

Technical Context

The 2N5366 operates as a silicon PNP bipolar junction transistor with fixed emitter-collector polarity and base-controlled current amplification. Its design supports linear amplification up to 300 mA collector current and switching operation with V_CE(sat) ≤ 1.0 V at I_C = 300 mA / I_B = 30 mA.

Thermal performance is defined by R_θJA = 200°C/W and maximum junction temperature of +150°C, requiring heatsinking or airflow for sustained >300 mW dissipation. Input and output capacitances (C_ib = 35 pF, C_ob = 8.0 pF) limit usable bandwidth in RF-coupled stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Maximum safe collector-emitter voltage before breakdown; sets upper rail limit in PNP switch or amplifier stage.
I_C (continuous)	500 mA - Absolute max DC collector current; usable up to 300 mA per device specification for reliable h_FE and thermal margin.
h_FE	80–300 - DC current gain varies significantly with operating point (e.g., 80 at 2 mA, 100 at 50 mA, 40 at 300 mA); impacts bias network design stability.
V_CE(sat)	0.25–1.0 V - Saturation voltage rises with load current; determines conduction loss and minimum output swing in switching applications.
R_θJA	200°C/W - Junction-to-ambient thermal resistance in free-air TO-92 mounting; limits continuous power dissipation to ~313 mW at 75°C ambient.
C_ob	8.0 pF - Output capacitance at 10 V reverse bias; constrains high-frequency response and affects stability in feedback amplifiers.

Pinout & Package

2N5366 is housed in a standard TO-92 plastic package with lead spacing matching JEDEC TO-92 outline. The device has three terminals arranged in linear order: Emitter (Pin 1), Collector (Pin 2), Base (Pin 3).

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal for PNP device	Connected to higher potential rail in common-emitter configuration; requires external current-limiting resistor when used as switch.
2 (Collector)	Current sink terminal	Typically tied to load and ground-return path; voltage swing limited by V_CEO rating and saturation behavior.
3 (Base)	Control input for minority-carrier injection	Requires current-driven bias (not voltage-driven); base-emitter on voltage is 0.5–0.8 V at 2 mA, rising to ~2.0 V at high drive.

Key Features

Feature	Design Value
PNP polarity with 40 V breakdown	Enables high-side switching and complementary designs where NPN alternatives are unavailable or mismatched.
h_FE tested at multiple I_C points	Provides verified gain data across 2 mA–300 mA range, supporting accurate bias design for both small-signal and power stages.
V_CE(sat) specified at 300 mA	Confirms usable saturation performance under substantial load, critical for relay drivers and power logic interfaces.
TO-92 package with JEDEC-compliant dimensions	Ensures compatibility with legacy through-hole PCB footprints, wave soldering profiles, and manual prototyping workflows.

Applications

Audio Pre-amplifier Stage	DC Motor Direction Control
Use Scenario: Low-noise, single-supply audio pre-amplifier for microphone or sensor signal conditioning in portable equipment. IC Role / Device Role / Timing Role: PNP transistor configured in common-emitter mode to provide voltage gain with inverted output polarity. Use Value: h_FE ≥ 80 at 2 mA enables stable biasing with minimal quiescent current; V_CE(sat) < 0.3 V preserves headroom near supply rail.	Use Scenario: H-bridge half-bridge driver for bidirectional 12 V DC motor control in industrial actuators. IC Role / Device Role / Timing Role: High-side PNP switch controlling motor voltage rail connection during forward/reverse commutation. Use Value: 40 V V_CEO rating exceeds 12 V system rail with margin; 500 mA I_C supports motors drawing ≤400 mA typical.
Linear Voltage Regulator Pass Element	Discrete Logic Level Shifter
Use Scenario: Series pass transistor in adjustable 5–15 V linear regulator for analog subsystems requiring low ripple. IC Role / Device Role / Timing Role: PNP emitter-follower configured as current amplifier between error amplifier and output load. Use Value: Continuous I_C rating of 500 mA supports ≥400 mA load current; thermal resistance allows heatsink-free operation up to 313 mW dissipation.	Use Scenario: Bidirectional level translation between 3.3 V microcontroller GPIO and 5 V peripheral interface. IC Role / Device Role / Timing Role: Discrete PNP-based open-collector translator enabling voltage domain isolation without active IC. Use Value: V_EBO = 4.0 V permits safe 5 V pull-up while driven by 3.3 V base; C_ib = 35 pF ensures sub-100 ns propagation delay.

Audio Pre-amplifier Stage

DC Motor Direction Control

Use Scenario: Low-noise, single-supply audio pre-amplifier for microphone or sensor signal conditioning in portable equipment.

IC Role / Device Role / Timing Role: PNP transistor configured in common-emitter mode to provide voltage gain with inverted output polarity.

Use Value: h_FE ≥ 80 at 2 mA enables stable biasing with minimal quiescent current; V_CE(sat) < 0.3 V preserves headroom near supply rail.

Use Scenario: H-bridge half-bridge driver for bidirectional 12 V DC motor control in industrial actuators.

IC Role / Device Role / Timing Role: High-side PNP switch controlling motor voltage rail connection during forward/reverse commutation.

Use Value: 40 V V_CEO rating exceeds 12 V system rail with margin; 500 mA I_C supports motors drawing ≤400 mA typical.

Linear Voltage Regulator Pass Element

Discrete Logic Level Shifter

Use Scenario: Series pass transistor in adjustable 5–15 V linear regulator for analog subsystems requiring low ripple.

IC Role / Device Role / Timing Role: PNP emitter-follower configured as current amplifier between error amplifier and output load.

Use Value: Continuous I_C rating of 500 mA supports ≥400 mA load current; thermal resistance allows heatsink-free operation up to 313 mW dissipation.

Use Scenario: Bidirectional level translation between 3.3 V microcontroller GPIO and 5 V peripheral interface.

IC Role / Device Role / Timing Role: Discrete PNP-based open-collector translator enabling voltage domain isolation without active IC.

Use Value: V_EBO = 4.0 V permits safe 5 V pull-up while driven by 3.3 V base; C_ib = 35 pF ensures sub-100 ns propagation delay.

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 = 25–250, TO-92 package	Higher voltage rating but lower gain consistency at low I_C; suited for HV switching over amplification	Select when breakdown voltage >100 V is required; not recommended for precision gain-critical stages.
BC557	V_CEO = 45 V, I_C = 100 mA, h_FE = 110–800, TO-92	Lower current capability but tighter h_FE spread; optimized for small-signal use below 50 mA	Prefer for low-power amplification where gain stability matters more than drive strength.

Compared with MPSA92 and BC557, the 2N5366 uniquely balances 40 V breakdown, 500 mA current capacity, and verified h_FE across 2–300 mA-making it suitable for medium-power PNP roles where both voltage margin and drive capability are needed without HV or ultra-low-noise specialization.

Availability

2N5366 is available at Aetrix Electronics and suitable for audio pre-amplifier stages, DC motor direction control circuits, and linear voltage regulator pass elements requiring stable component supply and long-term obsolescence management.

Supply support for 2N5366 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 discrete power devices, analog ICs, and optoelectronics before its acquisition by ON Semiconductor in 2016.

The 2N5366 belongs to Fairchild's legacy general-purpose bipolar transistor family, designed for cost-sensitive, medium-current linear and switching applications in industrial controls and consumer electronics.

FAQ

What is the maximum continuous collector current for the 2N5366?

The 2N5366 has an absolute maximum continuous collector current rating of 500 mA at T_C = 25°C. However, the datasheet specifies electrical characteristics-including h_FE and V_CE(sat)-up to 300 mA, indicating that reliable operation with guaranteed parameters occurs within this lower range. Derating is required above 25°C ambient per the 5.0 mW/°C thermal specification.

Is the 2N5366 a PNP or NPN transistor?

The 2N5366 is a PNP bipolar junction transistor. This is confirmed by its absolute maximum ratings (e.g., negative I_C implied in context), pinout (Emitter–Collector–Base sequence), and application description as a "PNP General Purpose Amplifier" in the official Fairchild datasheet Rev. A1.

What is the pin configuration of the 2N5366 in TO-92 package?

When viewed with the flat side facing forward and leads pointing downward, the 2N5366 TO-92 pinout is: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base. This arrangement is explicitly documented in the "Package Dimensions" section of the Fairchild 2N5366 datasheet and matches JEDEC TO-92 standard orientation for PNP devices.

Does the 2N5366 have a specified transition frequency (f_T)?

No, the 2N5366 datasheet does not specify transition frequency (f_T). It provides small-signal current gain (h_fe) at 1 MHz (80–450), but no f_T value is given. Therefore, the 2N5366 should be considered unsuitable for RF or high-speed switching applications where f_T > 10 MHz is required.

Can the 2N5366 replace the 2N3906 in a circuit?

The 2N5366 is not a direct replacement for the 2N3906. While both are PNP TO-92 transistors, the 2N3906 is rated for only 200 mA I_C and 40 V V_CEO, whereas the 2N5366 supports 500 mA I_C and identical V_CEO. Substituting 2N5366 for 2N3906 may cause unintended bias shifts due to higher h_FE variation and different saturation characteristics; redesign of base drive is recommended.

2N5366 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):: 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 FAQ

1.How can I place an order for 2N5366 through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N5366 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 reliable?

The price and inventory of 2N5366 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N5366 is usually 5 days.

3.What payment methods are accepted for 2N5366?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N5366 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N5366?

2N5366 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N5366 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?

For technical support, including 2N5366 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N5366 requirements.

6.How does Aetrix verify that 2N5366 is sourced from the original manufacturer or authorized distributors?

All 2N5366 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 meets industry standards.

7.What is the process for return or replacement of 2N5366?

All 2N5366 units undergo pre-shipment inspection (PSI). If there is an issue with 2N5366, 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 part is unused and in its original packaging.

Return procedure for 2N5366:

1.Submit a request within 90 days.

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

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