BC817-40 Datasheet & Equivalents
NPN
SOT-23
General Purpose
YFW
VCEO
45V
Ic Max
500mA
Pd Max
300mW
hFE Gain
630
Quick Reference
The BC817-40 is a NPN bipolar junction transistor in a SOT-23 package, manufactured by YFW. It supports a breakdown voltage of 45V and continuous collector current of 500mA. It is widely used in switching and amplification circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | YFW | Original Manufacturer |
| Package | SOT-23 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| Category | Single | Configuration |
| Collector-Emitter Voltage (VCEO) | 45V | Max breakdown voltage |
| Collector Current (Ic) | 500mA | Max current handling |
| Power Dissipation (Pd) | 300mW | Max thermal limit |
| DC Current Gain (hFE) | 630 | Base signal amplification ratio |
| Transition Frequency (fT) | 100MHz | Max operating frequency |
| Saturation Voltage (VCEsat) | - | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | - | Max emitter-base breakdown |
| Collector Cutoff Current | - | Leakage current when OFF |
| Operating Temp | -55℃~+150℃ | Safe junction temperature range |
Equivalent Transistors & Alternatives
| Part | Type | Package | VCEO | IC | hFE | Pd | Manufacturer / Datasheet |
|---|---|---|---|---|---|---|---|
| BC817-25 | NPN | SOT-23 | 45V | 500mA | 630 | 300mW | GOODWORK 📄 PDF |
| BC817-40-6AF | NPN | SOT-23 | 45V | 500mA | 600 | 300mW | FOSAN 📄 PDF |
| BC817-40Q-7-F | NPN | SOT-23 | 45V | 500mA | 600 | 310mW | DIODES 📄 PDF |
| BC817 | NPN | SOT-23 | 45V | 500mA | 600 | 300mW | ALJ 📄 PDF |
| BC817 | NPN | SOT-23 | 45V | 500mA | 600 | 300mW | High Diode 📄 PDF |
| BC817-25-6AF | NPN | SOT-23 | 45V | 500mA | 400 | 300mW | FOSAN 📄 PDF |
| BC817-25 | NPN | SOT-23 | 45V | 500mA | 400 | 300mW | YFW 📄 PDF |
| BC817-16-6AF | NPN | SOT-23 | 45V | 500mA | 250 | 300mW | FOSAN 📄 PDF |
| BC817-40(RANGE:250-600) | NPN | SOT-23 | 45V | 500mA | 250 | 300mW | JSCJ 📄 PDF |
| BC817-40 | NPN | SOT-23 | 45V | 500mA | 250 | 345mW | Nexperia 📄 PDF |
| 215 | NPN | SOT-23 | 45V | 500mA | 250 | 330mW | PANJIT 📄 PDF |
| BC817-40-AU_R1_000A1 | NPN | SOT-23 | 45V | 500mA | 250 | 345mW | Nexperia 📄 PDF |
| BC817-40-QR | NPN | SOT-23 | 45V | 500mA | 250 | 300mW | MCC 📄 PDF |
| BC817-40-TP | NPN | SOT-23 | 45V | 500mA | 250 | 225mW | onsemi 📄 PDF |
| BC817-40LT1G | NPN | SOT-23 | 45V | 500mA | 250 | 300mW | LRC 📄 PDF |
| LBC817-40LT1G | NPN | SOT-23 | 45V | 500mA | 250 | 225mW | LRC 📄 PDF |
| S-LBC817-40LT1G | NPN | SOT-23 | 45V | 500mA | 250 | 300mW | FOSAN 📄 PDF |
| BC817-16 | NPN | SOT-23 | 45V | 500mA | 250 | 300mW | XCH 📄 PDF |
| BC817-16 | NPN | SOT-23 | 45V | 500mA | 170 | 350mW | DIODES 📄 PDF |
| BC817-40-7-F | NPN | SOT-23 | 45V | 500mA | 160 | 250mW | Nexperia 📄 PDF |