BD437 Transistor Datasheet & Specifications
NPN
TO-126
High Power
ST
VCEO
45V
Ic Max
4A
Pd Max
36W
hFE Gain
30
Quick Reference
The BD437 is a NPN bipolar transistor in a TO-126 package by ST. This datasheet provides complete specifications including 45V breakdown voltage and 4A continuous collector current. Download the BD437 datasheet PDF above for detailed pinout diagrams and application circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | ST | Original Manufacturer |
| Package | TO-126 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| VCEO | 45V | Breakdown voltage |
| Ic | 4A | Collector current |
| Pd | 36W | Power dissipation |
| DC Current Gain | 30 | hFE / Beta |
| Frequency | 3MHz | Transition speed (fT) |
| VCEsat | - | Saturation voltage |
| Vebo | - | Emitter-Base voltage |
| Cutoff Current | - | Leakage (ICBO) |
| Temp | -65℃~+150℃ | Operating temp |
Equivalent Transistors & Alternatives
| Part | Type | Package | VCEO | Ic | Pd |
|---|---|---|---|---|---|
| BD237STU-HXY | NPN | TO-126 | 100V | 15A | 1W |
| BD437 | NPN | TO-126 | 45V | 4A | 36W |
| KSD1691YSTU | NPN | TO-126 | 60V | 5A | 1.3W |
| BD681 | NPN | TO-126 | 100V | 4A | 2W |
| BD441 | NPN | TO-126 | 80V | 4A | 25W |
| BD681 | NPN | TO-126 | 100V | 4A | 40W |