2SC945 Datasheet & Equivalents
NPN
TO-92
General Purpose
BLUE ROCKET
VCEO
50V
Ic Max
150mA
Pd Max
250mW
hFE Gain
90
Quick Reference
The 2SC945 is a NPN bipolar junction transistor in a TO-92 package, manufactured by BLUE ROCKET. It supports a breakdown voltage of 50V and continuous collector current of 150mA. It is widely used in switching and amplification circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | BLUE ROCKET | Original Manufacturer |
| Package | TO-92 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| Category | Single | Configuration |
| Collector-Emitter Voltage (VCEO) | 50V | Max breakdown voltage |
| Collector Current (Ic) | 150mA | Max current handling |
| Power Dissipation (Pd) | 250mW | Max thermal limit |
| DC Current Gain (hFE) | 90 | Base signal amplification ratio |
| Transition Frequency (fT) | 450MHz | Max operating frequency |
| Saturation Voltage (VCEsat) | 300mV | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | 5V | Max emitter-base breakdown |
| Collector Cutoff Current | 100nA | Leakage current when OFF |
| Operating Temp | - | Safe junction temperature range |
Equivalent Transistors & Alternatives
| Part | Type | Package | VCEO | IC | hFE | Pd | Manufacturer / Datasheet |
|---|---|---|---|---|---|---|---|
| 2SC1815(RANGE:200-400) | NPN | TO-92 | 50V | 150mA | 70 | 400mW | JSCJ 📄 PDF |
| KSC1815YTA | NPN | TO-92 | 50V | 150mA | 70 | 400mW | onsemi 📄 PDF |
| 2SC1815-GR | NPN | TO-92 | 50V | 150mA | 200 | 400mW | BLUE ROCKET 📄 PDF |
| 2SC536N(RANGE:160-320) | NPN | TO-92 | 50V | 150mA | 560 | 625mW | JSCJ 📄 PDF |
| 2SC945-P | NPN | TO-92 | 50V | 150mA | 600 | 250mW | YFW 📄 PDF |
| 2SC1815-GR | NPN | TO-92 | 50V | 150mA | 700 | 400mW | YFW 📄 PDF |