BUL128D-B Transistor Datasheet & Specifications
NPN
TO-220
High Power
ST
VCEO
400V
Ic Max
4A
Pd Max
70W
hFE Gain
10
Quick Reference
The BUL128D-B is a NPN bipolar transistor in a TO-220 package by ST. This datasheet provides complete specifications including 400V breakdown voltage and 4A continuous collector current. Download the BUL128D-B datasheet PDF above for detailed pinout diagrams and application circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | ST | Original Manufacturer |
| Package | TO-220 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| VCEO | 400V | Breakdown voltage |
| Ic | 4A | Collector current |
| Pd | 70W | Power dissipation |
| DC Current Gain | 10 | hFE / Beta |
| Frequency | - | Transition speed (fT) |
| VCEsat | - | Saturation voltage |
| Vebo | - | Emitter-Base voltage |
| Cutoff Current | 500uA | Leakage (ICBO) |
| Temp | -65℃~+150℃ | Operating temp |
Equivalent Transistors & Alternatives
| Part | Type | Package | VCEO | Ic | Pd |
|---|---|---|---|---|---|
| MJE13007G | NPN | TO-220 | 400V | 8A | 80W |
| MJE13009-2 | NPN | TO-220 | 400V | 12A | 100W |
| KSE13007H2SMTU-HXY | NPN | TO-220 | 400V | 8A | 80W |
| 13007B | NPN | TO-220 | 400V | 5A | 2W |
| BUL38D | NPN | TO-220 | 450V | 5A | 80W |
| WGD13005 | NPN | TO-220 | 400V | 4A | 70W |
| MJE13006-HXY | NPN | TO-220 | 400V | 8A | 80W |
| NTE2312-HXY | NPN | TO-220 | 400V | 8A | 80W |
| FJP13007H1TU-F080-HXY | NPN | TO-220 | 400V | 8A | 80W |
| MOT13005DA | NPN | TO-220 | 400V | 4A | 40W |