Microsemi 2N4957 RF BJT
2N4957 by Microsemi · RF BJT · TO-72
Same model may have multiple batches, images only for reference.
Manufacturer
Part Number (MPN)
2N4957
Package
TO-72
Lifecycle Status
Obsolete
Datasheet
2N4957 Datasheet
Quick Jump:
Technical Specifications
Microsemi 2N4957 RF BJT technical specifications.
General
RoHS
Non-Compliant
Package / Case
Bulk
Mounting Type
Through Hole
Operating Temperature
-65°C ~ 200°C (TJ)
Lifecycle Status
Obsolete
Current Collector IC Max
30 mA
Dc Current Gain Hfe Min IC Vce
30 @ 5mA, 10V
Gain
25dB
Noise Figure Db Typ F
3.5dB @ 450MHz
Power Max
200 mW
Alternate Parts Comparison (2N4957 vs MS2201 vs SD1224 vs SD1332-05C)
Side-by-side technical parameter comparison of related primary models in this product family.
| This Part | Alternate Parts | Alternate Parts | Alternate Parts | |
|---|---|---|---|---|
| Package / Case | Bulk | M220 | M135 | M150 |
| Mounting Type | Through Hole | Chassis Mount | Chassis Mount | Surface Mount |
| Operating Temperature | -65°C ~ 200°C (TJ) | 200°C (TJ) | 200°C (TJ) | 200°C |
| Current Collector IC Max | 30 mA | 250mA | 5A | 30A |
| Dc Current Gain Hfe Min IC Vce | 30 @ 5mA, 10V | 0.95 @ 10mA, 5V | 20 @ 500mA, 5V | 50 @ 14mA, 10V |
| Gain | 25dB | 9dB | 7.6dB | 17dB |
| Power Max | 200 mW | 10W | 60W | 180W |
| Transistor Type | PNP | NPN | NPN | NPN |
| Voltage Collector Emitter Breakdown Max | 30 V | 45V | 35V | 15V |
| RoHS | Non-Compliant | Yes | Yes | -- |
| Frequency Transition | -- | 1.025GHz ~ 1.15GHz | 175MHz | 5.5GHz |
| Action |
More Parts in RF BJT
Browse additional parts from the same category, grouped by series, package type, and manufacturer. These are catalog suggestions — not verified pin-compatible alternates.