Manufacturer Part Number

BC33740TA

Description

General purpose NPN bipolar junction transistor. Maximum collector-emitter voltage is 45V, collector current up to 0.8A. The device is offered in a TO-92-3 (TO-226AA) form factor, suitable for through hole assembly. Ideal for small signal amplification and switching in various electronic circuits. High current gain and fast switching make it effective for precision control applications. New original parts in stock and ROHS3 compliant.

Specifications

Collector to emitter voltage: 45 volts

Maximum collector current: 800 milliamps

Power dissipation: 625 milliwatts

Transition frequency: 100 megahertz

Saturation voltage: 700mV at 50mA/500mA

DC current gain (hFE): minimum 250 at 100mA, 1V

Collector cutoff current: max 100nA

Operating temperature: up to 150°C

Package type: TO-92-3 (TO-226AA) formed leads

Mounting type: Through hole

Moisture sensitivity: Not applicable

RoHS compliance: Yes (ROHS3)

REACH status: Unaffected

Device Structure

NPN silicon transistor, bipolar junction type. Package is TO-92-3 (TO-226AA), which has three leads for collector, base, and emitter connections. Standard configuration for easy integration onto PCBs with through hole technology.

Performance Characteristics

Able to handle up to 800mA of collector current. Fast switching with 100MHz transition frequency. Maintains high current gain at low voltages. Low collector cutoff current means efficient off-state leakage. Reliable operation up to 150°C junction temperature. Saturation voltage is low, aiding energy efficiency.

Application Environments

Instrumentation and audio amplification

Signal processing circuits

Low and moderate power switching

Consumer electronics and industrial controls

Educational electronics prototyping

Used in circuits where robust signal amplification and switching are required

Selection Guidelines

Choose BC33740TA when you need a reliable general-purpose NPN transistor for signal amplification or switching. Confirm that the operating voltage and current in your design do not exceed the transistor’s 45V and 0.8A ratings. Ensure the package (TO-92-3) matches your PCB layout and assembly method. Consider transition frequency if working in high-speed circuits.

Usage Considerations

Do not exceed maximum voltage or current to avoid damage. Provide adequate heat dissipation if operating near 625mW power limit. Observe pin configuration during installation—incorrect connection can cause failure. Suitable for use in ROHS3 compliant designs. Not sensitive to moisture (MSL not applicable).

Potential Equivalent/Replacement Models

Potential equivalent models include:

BC337-25 (Fairchild, NXP, ON Semiconductor alternatives)

BC337-16 (lower gain version, ON Semiconductor, NXP)

BC547, BC548 (lower current, same package, similar circuit use)

2N2222 (TO-92, higher current, similar application)

PN2222A (TO-92, similar specs, check ratings)

For detailed confirmation of equivalence and to discuss your design needs, contact Ariat-Tech sales team. For specific alternatives compatible with all your requirements, please get in touch.

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