Fairchild 2N5457 2N5458 2N5459 Data Manual, MMBF5457 MMBF5458 MMBF5459 N-channel General Purpose Amplifier Specification Guide.
Summary
High-performance N-Channel general purpose transistors designed for reliable operation in low-level audio amplification and analog switching applications. This comprehensive technical datasheet provides engineering professionals with critical performance data, including absolute maximum ratings, detailed thermal characteristics, small signal parameters, and full electrical specifications necessary for designing robust power electronics circuits.
Page 1 Text Content
2N5457 MMBF5457 2N5458 MMBF5458 2N5459 MMBF5459
TO-92
SOT-23 NOTE: Source & Drain
Mark: 6D / 61S / 6L are interchangeable
N-Channel General Purpose Amplifier This device is a low level audio amplifier and switching transistors, and can be used for analog switching applications. Sourced from Process 55.
Absolute Maximum Ratings* TA = 25°C unless otherwise noted Symbol Parameter Value Units VDG Drain-Gate Voltage VGS Gate-Source Voltage - 25 IGF Forward Gate Current m A
TJ, Tstg Operating and Storage Junction Temperature Range -55 to +150 °C
*These ratings are limiting values above which the serviceability of any semiconductor device may be impaired. NOTES: 1) These ratings are based on a maximum junction temperature of 150 degrees C. 2) These are steady state limits. The factory should be consulted on applications involving pulsed or low duty cycle operations.
Thermal Characteristics TA = 25°C unless otherwise noted Symbol Characteristic Max Units
2N5457-5459 *MMBF5457-5459
PD Total Device Dissipation m W
Derate above 25°C 5.0 2.8 m W/°C
RθJC Thermal Resistance, Junction to Case °C/W RθJA Thermal Resistance, Junction to Ambient °C/W
*Device mounted on FR-4 PCB 1.6" X 1.6" X 0.06."
1997 Fairchild Semiconductor Corporation
Page Summary Contents For Fairchild 2N5457 2N5458 2N5459 Data Manual, MMBF5457 MMBF5458 MMBF5459 N-channel General Purpose Amplifier Specification Guide.
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 5 |
| File Size | 129.85 KB |
| Published | June 02, 2026 |
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Frequently Asked Questions
What types of applications can this N-Channel Amplifier be used for?
It can function as a low level audio amplifier and for analog switching applications.
How do I determine the maximum power dissipation?
The maximum total device dissipation varies by package; e.g., TO-92 is 625 mW, while SOT-23 is 350 mW (or less depending on mounting).
What are the typical gate-source voltages for the different models?
The Gate-Source Cutoff Voltage (VGS(off)) ranges from -1.0 V (Model 5457) up to -8.0 V (Model 5458).
Is this device suitable for life support systems?
No, Fairchild’s products are not authorized for use as critical components in life support devices or systems without express written approval.