BC817-25

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BC817-25

+BOM

TRANS NPN 45V 0.8A SOT23-3

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Specifications

Attribute Value
Package Strip
ProductStatus Active
TransistorType NPN
Current-Collector(Ic)(Max) 800 mA
Voltage-CollectorEmitterBreakdown(Max) 45 V
VceSaturation(Max)@IbIc 700mV @ 50mA, 500mA
Current-CollectorCutoff(Max) 100nA (ICBO)
DCCurrentGain(hFE)(Min)@IcVce 160 @ 100mA, 1V
Power-Max 310 mW
Frequency-Transition 100MHz
OperatingTemperature -55°C ~ 150°C (TJ)
MountingType Surface Mount
Package/Case TO-236-3, SC-59, SOT-23-3

Overview

Description

The BC817-25 is a general-purpose NPN bipolar junction transistor (BJT) in a SOT-23 package, designed for low-power amplification and switching applications. Key features:
- Current Rating: 500mA collector current (Ic).
- Voltage Rating: 45V collector-emitter voltage (Vceo).
- Gain (hFE): 160–400 (at Ic = 2mA, marked "25" in the part number).
- Low Saturation Voltage: Ideal for switching.
- Package: Compact SOT-23 for space-constrained designs.
Common uses include signal amplification, LED driving, and load switching in consumer electronics, IoT devices, and embedded systems.
Alternatives: BC807-25 (PNP complement), BC817-16/40 (different hFE grades).
Check the datasheet for detailed specifications.

Equivalent

Equivalent products to the BC817-25 (NPN transistor, 45V, 500mA) include:
- BC807-25 (PNP complement)
- 2N3904 (similar specs, widely available)
- MMBT3904 (SMD version of 2N3904)
- BC547B (higher current gain, 45V)
- KSC1845 (higher voltage, audio applications)
Check datasheets for exact parameter matching.

Features

The BC817-25 is a general-purpose NPN bipolar junction transistor (BJT) with the following key features:
- Package: SOT-23 (small surface-mount)
- Polarity: NPN
- Max Collector Current (Ic): 500 mA
- Max Collector-Emitter Voltage (Vce): 45 V
- Max Power Dissipation (Pd): 330 mW
- DC Current Gain (hFE): 160–400 (at Ic = 2 mA, Vce = 5 V)
- Transition Frequency (fT): 100 MHz (typical)
- Low Saturation Voltage: Ideal for switching applications
- Applications: Amplification, switching in low-power circuits, drivers, and signal processing.
Compact, reliable, and cost-effective, it’s widely used in consumer electronics, embedded systems, and automation.

Application

The BC817-25 is a general-purpose NPN transistor commonly used in:
1. Switching Circuits – For low-power switching in relays, LEDs, and small loads.
2. Amplification – Signal amplification in audio and RF applications.
3. Driver Stages – Driving small motors, sensors, or other transistors.
4. Logic Interfaces – Level shifting in digital circuits (e.g., microcontroller I/O).
5. Consumer Electronics – Found in TVs, remote controls, and portable devices.
Its key features include a 45V collector-emitter voltage, 500mA current rating, and moderate gain (hFE ≈ 160), making it suitable for low-power applications.

Package

The BC817-25 is a general-purpose NPN transistor available in a SOT-23 surface-mount package. This compact 3-pin package is widely used for small-signal amplification and switching applications. Key features include a small footprint (2.9mm x 1.3mm x 0.95mm) and suitability for automated PCB assembly. The "-25" suffix denotes its current gain (hFE) range of 160–400.

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