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

onsemi BC369_D74Z

Name: BC369_D74Z
Brand: onsemi
SKU: BC369_D74Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC369_D74Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: BC369_D74Z.pdf

Description:: TRANS PNP 20V 1.5A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC369_D74Z from Fairchild Semiconductor is a PNP general-purpose amplifier transistor in TO-92 package, rated for V_CEO = 20 V, I_C = 1.5 A continuous, and P_D = 625 mW at 25°C, designed for medium-power linear amplification and switching applications up to 1.2 A collector current.

For engineers reviewing the BC369_D74Z datasheet, pinout, applications, or equivalent options, key selection criteria include its PNP polarity, DC current gain (h_FE = 50–375 at I_C = 5 mA to 1.0 A), V_CE(sat) ≤ 0.5 V at I_C = 1.0 A / I_B = 100 mA, thermal resistance R_θJA = 200 °C/W, and operation across –55°C to +150°C junction temperature range.

Technical Context

The BC369_D74Z is a silicon planar PNP bipolar junction transistor fabricated using Fairchild's Process 77. It operates with negative-polarity voltages and currents, requiring reverse-biased base-emitter and collector-base junctions for forward-active mode.

Its small-signal f_T of 45 MHz at I_C = 10 mA / V_CE = 5 V supports moderate-frequency amplification, while V_(BR)CEO = 20 V and V_(BR)CES = 25 V define safe operating voltage limits under open-emitter and open-emitter conditions respectively.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	20 V - Maximum collector-emitter voltage before breakdown with emitter open; defines safe DC bias headroom in switching or amplifier stages.
I_C (cont.)	1.5 A - Continuous collector current rating; supports medium-power load switching up to ~1.2 A typical design margin.
h_FE	50–375 - DC current gain range across I_C = 5 mA to 1.0 A; enables predictable base drive sizing in linear and saturated switch designs.
V_CE(sat)	≤ 0.5 V at I_C = 1.0 A / I_B = 100 mA - Low saturation voltage minimizes conduction loss and heat generation in switching applications.
f_T	45 MHz - Current-gain bandwidth product at I_C = 10 mA / V_CE = 5 V; suitable for audio and low-MHz signal amplification.
T_J Range	–55°C to +150°C - Wide junction temperature range allows deployment in industrial and automotive under-hood environments without derating.

Pinout & Package

BC369_D74Z is housed in a standard TO-92 plastic package with 3 leads. Lead identification follows JEDEC TO-92 outline: Emitter (lead 1), Base (lead 2), Collector (lead 3), with flat side facing viewer and leads down.

Pin/Terminal	Circuit Role	Design Meaning
Emitter (E)	Current sink terminal in PNP configuration	Connected to higher potential (e.g., V_CC) in common-emitter switches; sets reference for base bias network.
Base (B)	Control input for minority-carrier injection	Receives negative-polarity current to turn on device; requires series resistor to limit I_B per h_FE and load requirements.
Collector (C)	Output current terminal	Connected to load and lower-potential rail (e.g., GND); carries full load current with minimal V_CE(sat) drop when saturated.

Key Features

Feature	Design Value
TO-92 package compatibility	Standard through-hole footprint enables use in legacy PCB layouts and manual prototyping without retooling.
High h_FE at high I_C	h_FE ≥ 60 at I_C = 1.0 A ensures stable gain and reduced base drive power in medium-current switching.
Low V_BE(on)	1.0 V at I_C = 1.0 A simplifies bias network design and improves efficiency in emitter-follower configurations.
Thermal robustness	R_θJA = 200 °C/W and T_J(max) = +150°C support reliable operation in unheatsinked industrial ambient up to +75°C.

Applications

Audio Power Amplifier Stages	DC Motor Driver Switches
Use Scenario: Medium-power Class-B or push-pull audio output stage driving 8 Ω speakers up to ~1 W. IC Role / Device Role / Timing Role: PNP complement in push-pull pair providing negative half-cycle amplification with low V_CE(sat) and adequate f_T. Use Value: Enables symmetrical distortion performance and efficient power delivery without heatsinking at <1 W output levels.	Use Scenario: Unidirectional brushed DC motor control in battery-powered tools or actuators drawing ≤1.2 A peak. IC Role / Device Role / Timing Role: High-side PNP switch controlling motor supply rail with base-driven logic-level interface. Use Value: Delivers low-loss conduction (V_CE(sat) ≤ 0.5 V) and fast turn-off via base resistor discharge, minimizing switching losses.
Relay Drivers	Linear Voltage Regulator Pass Elements
Use Scenario: Driving 12 V/100 mA electromagnetic relays from microcontroller GPIO pins. IC Role / Device Role / Timing Role: Saturated PNP switch interfacing low-current logic to higher-current inductive loads. Use Value: Provides >10× overdrive margin (I_B = 100 mA for I_C = 1.0 A) ensuring deep saturation and contact reliability.	Use Scenario: Series pass element in adjustable linear regulators delivering up to 1.0 A at 5–12 V output. IC Role / Device Role / Timing Role: PNP pass transistor regulating output by modulating base-emitter voltage in feedback loop. Use Value: Maintains stable regulation across wide temperature range due to predictable h_FE and V_BE characteristics.

Audio Power Amplifier Stages

DC Motor Driver Switches

Use Scenario: Medium-power Class-B or push-pull audio output stage driving 8 Ω speakers up to ~1 W.

IC Role / Device Role / Timing Role: PNP complement in push-pull pair providing negative half-cycle amplification with low V_CE(sat) and adequate f_T.

Use Value: Enables symmetrical distortion performance and efficient power delivery without heatsinking at <1 W output levels.

Use Scenario: Unidirectional brushed DC motor control in battery-powered tools or actuators drawing ≤1.2 A peak.

IC Role / Device Role / Timing Role: High-side PNP switch controlling motor supply rail with base-driven logic-level interface.

Use Value: Delivers low-loss conduction (V_CE(sat) ≤ 0.5 V) and fast turn-off via base resistor discharge, minimizing switching losses.

Relay Drivers

Linear Voltage Regulator Pass Elements

Use Scenario: Driving 12 V/100 mA electromagnetic relays from microcontroller GPIO pins.

IC Role / Device Role / Timing Role: Saturated PNP switch interfacing low-current logic to higher-current inductive loads.

Use Value: Provides >10× overdrive margin (I_B = 100 mA for I_C = 1.0 A) ensuring deep saturation and contact reliability.

Use Scenario: Series pass element in adjustable linear regulators delivering up to 1.0 A at 5–12 V output.

IC Role / Device Role / Timing Role: PNP pass transistor regulating output by modulating base-emitter voltage in feedback loop.

Use Value: Maintains stable regulation across wide temperature range due to predictable h_FE and V_BE characteristics.

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
BC327-40	Same TO-92 package; h_FE min = 250 at I_C = 100 mA (vs. BC369_D74Z's 60 at I_C = 1.0 A); V_CEO = 45 V.	Higher voltage rating suits 24 V systems; lower h_FE at high I_C may require larger base drive for 1 A loads.	Select BC327-40 when higher V_CEO and tighter h_FE binning are needed, but verify base drive capability at target I_C.
2N4403	TO-92; V_CEO = 40 V; h_FE = 50–250 at I_C = 150 mA; P_D = 625 mW same.	Broader h_FE spread and lower max I_C (600 mA) limit use in >0.6 A switching; better for low-current amplification.	Choose 2N4403 for cost-sensitive low-to-moderate current (<600 mA) linear or switching roles where 40 V rating suffices.

Compared with BC369_D74Z, BC327-40 offers higher voltage margin and tighter gain at mid-current but less verified high-current h_FE; 2N4403 provides comparable dissipation but lower current capability and wider gain variation-making BC369_D74Z optimal for 1 A-class PNP switching with balanced gain and saturation performance.

Availability

BC369_D74Z is available at Aetrix Electronics and suitable for audio amplifier stages, DC motor drivers, relay interfaces, and linear regulator pass elements requiring stable component supply and industrial temperature resilience.

Supply support for BC369_D74Z 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 devices before its acquisition by ON Semiconductor in 2016.

The BC369_D74Z belongs to Fairchild's legacy general-purpose bipolar transistor family, engineered for cost-effective, robust medium-power amplification and switching in industrial and consumer equipment.

FAQ

What is the maximum continuous collector current for BC369_D74Z?

The BC369_D74Z has a maximum continuous collector current (I_C) rating of 1.5 A at T_A = 25°C. Derating applies above 25°C per the 5.0 mW/°C thermal coefficient. In practice, sustained operation near 1.5 A requires careful thermal management due to its R_θJA = 200 °C/W. The datasheet specifies 1.2 A as the typical design limit for general-purpose amplifier and switch applications using BC369_D74Z.

Is BC369_D74Z a PNP or NPN transistor?

BC369_D74Z is a PNP bipolar junction transistor. All voltage and current polarities are negative per the datasheet: V_CE, V_CB, and V_BE are negative in forward-active operation, and collector current flows *into* the collector terminal only when the base is sufficiently negative relative to the emitter. This PNP configuration makes BC369_D74Z suitable for high-side switching and complementary amplifier topologies.

What is the DC current gain (h_FE) range of BC369_D74Z?

The BC369_D74Z exhibits a DC current gain (h_FE) ranging from 50 to 375 depending on operating conditions: minimum 50 at I_C = 5.0 mA / V_CE = 10 V, minimum 85 at I_C = 0.5 A / V_CE = 1.0 V, and minimum 60 at I_C = 1.0 A / V_CE = 1.0 V. This wide, current-dependent h_FE range must be accounted for in base bias design-BC369_D74Z requires conservative overdrive for reliable saturation at high collector currents.

What package type does BC369_D74Z use?

BC369_D74Z uses the industry-standard TO-92 plastic package with three leads in straight-line configuration. Pinout is Emitter (lead 1), Base (lead 2), Collector (lead 3) when viewed with flat side facing and leads pointing downward. This through-hole package supports manual soldering, breadboarding, and compatibility with legacy PCB footprints designed for general-purpose transistors such as BC327 or 2N3906-no redesign needed when substituting BC369_D74Z.

Does BC369_D74Z have a specified gain-bandwidth product (f_T)?

Yes, BC369_D74Z has a specified current-gain bandwidth product (f_T) of 45 MHz, measured at I_C = 10 mA, V_CE = 5.0 V, and f = 35 MHz test condition. This f_T value confirms suitability for audio-frequency amplification and low-MHz signal processing, though performance degrades at higher collector currents. Designers should consult the "Gain Bandwidth Product vs Collector Current" curve in the BC369_D74Z datasheet to determine usable bandwidth at their specific I_C operating point.

BC369_D74Z 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):: 1.5 A

Voltage - Collector Emitter Breakdown (Max):: 20 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 100mA, 1A

Current - Collector Cutoff (Max):: 10µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 85 @ 500mA, 1V

Power - Max:: 625 mW

Frequency - Transition:: 45MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

BC369_D74Z FAQ

1.How can I place an order for BC369_D74Z through Aetrix?

Please submit a Request for Quotation (RFQ) for BC369_D74Z 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 BC369_D74Z reliable?

The price and inventory of BC369_D74Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC369_D74Z is usually 5 days.

3.What payment methods are accepted for BC369_D74Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC369_D74Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC369_D74Z?

BC369_D74Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC369_D74Z 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 BC369_D74Z?

For technical support, including BC369_D74Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC369_D74Z requirements.

6.How does Aetrix verify that BC369_D74Z is sourced from the original manufacturer or authorized distributors?

All BC369_D74Z 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 BC369_D74Z meets industry standards.

7.What is the process for return or replacement of BC369_D74Z?

All BC369_D74Z units undergo pre-shipment inspection (PSI). If there is an issue with BC369_D74Z, 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 BC369_D74Z part is unused and in its original packaging.

Return procedure for BC369_D74Z:

1.Submit a request within 90 days.

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

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