ZTX458STZ Datasheet & Equivalents
NPN
TO-92
General Purpose
DIODES
VCEO
400V
Ic Max
300mA
Pd Max
1W
hFE Gain
100
Quick Reference
The ZTX458STZ is a NPN bipolar junction transistor in a TO-92 package, manufactured by DIODES. 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 | DIODES | 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) | 1W | Max thermal limit |
| DC Current Gain (hFE) | 100 | Base signal amplification ratio |
| Transition Frequency (fT) | 50MHz | Max operating frequency |
| Saturation Voltage (VCEsat) | 500mV | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | 5V | Max emitter-base breakdown |
| Collector Cutoff Current | 100nA | Leakage current when OFF |
| Operating Temp | -55℃~+200℃ | Safe junction temperature range |
Equivalent Transistors & Alternatives
| Part | Type | Package | VCEO | IC | hFE | Pd | Manufacturer / Datasheet |
|---|---|---|---|---|---|---|---|
| MPSA44 | NPN | TO-92 | 400V | 300mA | 50 | 1.5W | BLUE ROCKET 📄 PDF |
| KSP44BU | NPN | TO-92 | 400V | 300mA | 40 | 1.5W | onsemi 📄 PDF |
| 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 | 200 | 625mW | ST(Semtech) 📄 PDF |
| ZTX658 | NPN | TO-92 | 400V | 500mA | 50 | 1W | DIODES 📄 PDF |