KSP44BU Datasheet & Equivalents
NPN
TO-92
General Purpose
onsemi
VCEO
400V
Ic Max
300mA
Pd Max
1.5W
hFE Gain
40
Quick Reference
The KSP44BU is a NPN bipolar junction transistor in a TO-92 package, manufactured by onsemi. It supports a breakdown voltage of 400V and continuous collector current of 300mA. It is widely used in switching and amplification circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | onsemi | Original Manufacturer |
| Package | TO-92 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| Category | Single | Configuration |
| Collector-Emitter Voltage (VCEO) | 400V | Max breakdown voltage |
| Collector Current (Ic) | 300mA | Max current handling |
| Power Dissipation (Pd) | 1.5W | Max thermal limit |
| DC Current Gain (hFE) | 40 | Base signal amplification ratio |
| Transition Frequency (fT) | - | Max operating frequency |
| Saturation Voltage (VCEsat) | 750mV | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | 6V | Max emitter-base breakdown |
| Collector Cutoff Current | 100nA | Leakage current when OFF |
| Operating Temp | -55℃~+150℃ | Safe junction temperature range |
Equivalent Transistors & Alternatives
| Part | Type | Package | VCEO | IC | hFE | Pd | Manufacturer / Datasheet |
|---|---|---|---|---|---|---|---|
| KSP44TF | NPN | TO-92 | 400V | 300mA | 40 | 625mW | onsemi 📄 PDF |
| MPSA44G-T92-A-B | NPN | TO-92 | 400V | 300mA | 40 | 625mW | UTC 📄 PDF |
| MPSA44 | NPN | TO-92 | 400V | 300mA | 50 | 1.5W | BLUE ROCKET 📄 PDF |
| ZTX458STZ | NPN | TO-92 | 400V | 300mA | 100 | 1W | DIODES 📄 PDF |
| MPSA44 | NPN | TO-92 | 400V | 300mA | 200 | 625mW | ST(Semtech) 📄 PDF |
| ZTX658 | NPN | TO-92 | 400V | 500mA | 50 | 1W | DIODES 📄 PDF |