HFMMT491QTA Transistor Datasheet & Specifications
NPNSOT-23General Purpose
VCEO
60V
Ic Max
1A
Pd Max
250mW
Gain
80
Quick Reference
The HFMMT491QTA is a NPN bipolar transistor in a SOT-23 package. This datasheet provides complete specifications including 60V breakdown voltage and 1A continuous collector current. Download the HFMMT491QTA datasheet PDF below for detailed pinout diagrams and application circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | HXY MOSFET | Original Manufacturer |
| Package | SOT-23 | Physical mounting |
| VCEO | 60V | Breakdown voltage |
| IC Max | 1A | Collector current |
| Pd Max | 250mW | Power dissipation |
| Gain | 80 | DC current gain |
| Frequency | - | Transition speed |
| VCEsat | - | Saturation voltage |
| Vebo | 150MHz | Emitter-Base voltage |
| Temp | -55℃~+150℃ | Operating temp |
Direct Replacements & Alternatives
| Part | Type | Package | VCEO | Ic | Pd |
|---|---|---|---|---|---|
| MMBTA05(RANGE:100-400) | NPN | SOT-23 | 60V | 500mA | 300mW |
| BC817-16LT1G | NPN | SOT-23 | 45V | 500mA | 225mW |
| BC817-40LT1G | NPN | SOT-23 | 45V | 500mA | 225mW |
| DNBT8105-7 | NPN | SOT-23 | 60V | 1A | 600mW |
| S9014 | NPN | SOT-23 | 45V | 100mA | 300mW |
| FMMT493ATA | NPN | SOT-23 | 60V | 1A | 500mW |
| BC817-40Q-7-F | NPN | SOT-23 | 45V | 500mA | 310mW |
| BC846AQ-7-F | NPN | SOT-23 | 65V | 100mA | 310mW |
| BC847B-7-F | NPN | SOT-23 | 45V | 100mA | 300mW |