ZTX551 Datasheet & Equivalents
PNP
TO-92
General Purpose
DIODES
VCEO
60V
Ic Max
1A
Pd Max
1W
hFE Gain
50
Quick Reference
The ZTX551 is a PNP bipolar junction transistor in a TO-92 package, manufactured by DIODES. It supports a breakdown voltage of 60V and continuous collector current of 1A. 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) | 60V | Max breakdown voltage |
| Collector Current (Ic) | 1A | Max current handling |
| Power Dissipation (Pd) | 1W | Max thermal limit |
| DC Current Gain (hFE) | 50 | Base signal amplification ratio |
| Transition Frequency (fT) | 150MHz | Max operating frequency |
| Saturation Voltage (VCEsat) | 350mV | 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 |
|---|---|---|---|---|---|---|---|
| BC638TA | PNP | TO-92 | 60V | 1A | 25 | 1W | onsemi 📄 PDF |
| 2SB1116AG-G-T92-B | PNP | TO-92 | 60V | 1A | 200 | 750mW | UTC 📄 PDF |
| ZTX751STZ | PNP | TO-92 | 60V | 2A | 80 | 1.5W | DIODES 📄 PDF |
| ZTX792ASTZ | PNP | TO-92 | 70V | 2A | 300 | 1W | DIODES 📄 PDF |
| BC640 | PNP | TO-92 | 80V | 1A | 100 | 830mW | JSCJ 📄 PDF |
| BC640 | PNP | TO-92 | 80V | 1A | 160 | 830mW | LGE 📄 PDF |
| ZTX753 | PNP | TO-92 | 100V | 2A | - | 1W | DIODES 📄 PDF |
| ZTX705 | PNP | TO-92 | 120V | 1A | 3000 | 1W | DIODES 📄 PDF |