ZTX657STZ Datasheet & Equivalents
NPN
TO-92
General Purpose
DIODES
VCEO
300V
Ic Max
500mA
Pd Max
1W
hFE Gain
50
Quick Reference
The ZTX657STZ is a NPN bipolar junction transistor in a TO-92 package, manufactured by DIODES. It supports a breakdown voltage of 300V and continuous collector current of 500mA. It is widely used in switching and amplification circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | DIODES | Original Manufacturer |
| Package | TO-92 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| Category | Single | Configuration |
| Collector-Emitter Voltage (VCEO) | 300V | Max breakdown voltage |
| Collector Current (Ic) | 500mA | Max current handling |
| Power Dissipation (Pd) | 1W | Max thermal limit |
| DC Current Gain (hFE) | 50 | Base signal amplification ratio |
| Transition Frequency (fT) | 30MHz | 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℃~+200℃ | Safe junction temperature range |
Equivalent Transistors & Alternatives
| Part | Type | Package | VCEO | IC | hFE | Pd | Manufacturer / Datasheet |
|---|---|---|---|---|---|---|---|
| KSP42BU | NPN | TO-92 | 300V | 500mA | 40 | 625mW | onsemi 📄 PDF |
| KSP42TA | NPN | TO-92 | 300V | 500mA | 40 | 625mW | onsemi 📄 PDF |
| MPSA42 | NPN | TO-92 | 300V | 500mA | 40 | 1.5W | BLUE ROCKET 📄 PDF |
| MPSA42 | NPN | TO-92 | 300V | 500mA | 25 | 625mW | onsemi 📄 PDF |
| 2N6517-TA | NPN | TO-92 | 350V | 500mA | 30 | 625mW | JSCJ 📄 PDF |
| 2N6517 | NPN | TO-92 | 350V | 500mA | 200 | 625mW | YFW 📄 PDF |
| ZTX658 | NPN | TO-92 | 400V | 500mA | 50 | 1W | DIODES 📄 PDF |
| 3DD13002B(RANGE:25-30) | NPN | TO-92 | 400V | 800mA | 25 | 900mW | JSCJ 📄 PDF |
| PHE13003A | NPN | TO-92 | 400V | 1A | 7.5 | 2.1W | WeEn 📄 PDF |