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onsemi NPN Bipolar Transistor SOT-23, 500mA, 45V, 3-Pin, Surface Mount, BC817-40LT1G

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onsemi NPN Bipolar Transistor SOT-23, 500mA, 45V, 3-Pin, Surface Mount, BC817-40LT1G

Name: onsemi NPN Bipolar Transistor SOT-23, 500mA, 45V, 3-Pin, Surface Mount, BC817-40LT1G
Brand: onsemi
SKU: 87431

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Category Bipolar Transistors Brand onsemi Condition New

Specifications

Country of Origin	India
Brand	onsemi
Height	2.64mm
Length	3.04mm
Model	BC817-40LT1G
Width	1.11mm
Mount Type	Surface
Series	BC817-40L
Maximum Operating Temperature	150°C
Package Type	SOT-23
Pin Count	3
Maximum Collector Emitter Voltage Vceo	45V
Minimum DC Current Gain hFE	250
Transistor Polarity	NPN
Maximum Emitter Base Voltage VEBO	5V
Maximum Collector Base Voltage VCBO	50V
Automotive Standard	AEC-Q101
Maximum Power Dissipation Pd	300mW
Maximum DC Collector Current Idc	500mA
Transistor Configuration	Single
Maximum Transition Frequency ft	100MHz
Nexperia Transistor, 500 mA NPN, 45 V, 3-Pin SOT-23Brand	Nexperia

Key Features

Maximum DC collector current of 500mA supports moderate power switching and amplification.
Surface mount SOT-23 package enables compact PCB designs and efficient assembly processes.
NPN transistor polarity suitable for signal amplification and general purpose switching in electronic circuits.
Maximum collector-emitter voltage of 45V allows for diverse low-voltage applications.
High DC current gain, minimum hFE of 250, facilitates stable operation and efficient signal amplification.
Maximum transition frequency of 100MHz ensures fast switching performance in small signal applications.
Maximum power dissipation of 300mW makes it ideal for low-power designs and portable electronics.
Three-pin configuration offers straightforward PCB integration for manufacturing and prototyping use cases.

Product Description

onsemi’s BC817-40LT1G is a small-signal NPN bipolar transistor designed for linear and switching applications. With a maximum DC collector current of 500mA and a collector-emitter voltage capability up to 45V, it is suited for moderate power amplification and efficient digital switching in electronic circuits.

The device is supplied in a compact, surface-mount SOT-23 package, allowing easy integration onto printed circuit boards and facilitating automated manufacturing. The three-pin configuration simplifies layout for both prototyping and production environments.

Engineered for high performance, the BC817-40LT1G features a minimum DC current gain (hFE) of 250, ensuring stable amplification and reliable operation in a variety of signal processing tasks. Its maximum transition frequency of 100MHz makes it ideal for fast-switching and small-signal amplification use cases, ranging from polarity reversal protection and ESD protection to data line and inductive load switching.

The transistor’s maximum power dissipation is 300mW, making it particularly suitable for low-power, high-density designs such as portable electronics, automotive modules, and industrial control PCBs. With a maximum operating temperature of 150°C and compliance with AEC-Q101 automotive standards, it can be used in demanding industrial, commercial, and automotive applications.

In addition to its robust electrical characteristics, the BC817-40LT1G’s SOT-23 package measures only 3.04mm in length, 1.11mm in width, and 2.64mm in height, which is ideal for space-constrained products and PCB assemblies. The device’s reliability and performance are supported by its application in ESD protection, polarity reversal protection, data line protection, inductive load switching, and steering logic circuits.

Maximum collector current: 500mA. Maximum collector-emitter voltage: 45V. High DC gain, minimum hFE: 250. Surface-mount SOT-23 package. Three-pin configuration simplifies PCB layout. Power dissipation: 300mW. Transition frequency: 100MHz.

Automotive grade: AEC-Q101 standard.

The BC817-40LT1G NPN transistor is widely used in industrial, automotive, commercial electronics, instrumentation, and laboratory equipment. It is suitable for manufacturing, control panels, signal amplification, and logic steering in various circuit designs.

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