Key facts
- Brand
- Fairchild
- Model
- FQAF17N40
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-04-12
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Fairchild FQAF17N40 Datasheet
The FQAF17N40 is a 400 V N‑Channel enhancement mode power MOSFET designed with Fairchild's planar stripe DMOS technology for low on‑state resistance, low gate charge, and fast switching. It is intended for high‑efficiency switch‑mode power supplies and lamp ballast applications.
Key specifications include a continuous drain current of 12.2 A at 25 °C, pulsed current capability of 48.8 A, gate‑source voltage rating of ±30 V, and a power dissipation rating of 100 W. The device is supplied in a TO‑3PF package with detailed thermal resistance values and includes test circuit diagrams for gate charge and diode recovery characteristics.
Fairchild FQAF17N40 specifications
| Drain-Source Voltage (V_DSS) | 400 V |
|---|---|
| Continuous Drain Current (I_D) @25°C | 12.2 A |
| Pulsed Drain Current (I_D(pulsed)) | 48.8 A |
| Gate-Source Voltage (V_GS) | ±30 V |
| Power Dissipation (P_D) @25°C | 100 W |
| Junction-to-Case Thermal Resistance (RθJC) | 1.25 °C·W |
| Junction-to-Ambient Thermal Resistance (RθJA) | 40 °C·W |
| Typical Gate Charge | 45 nC |
Source: Fairchild FQAF17N40 Datasheet
All Fairchild FQAF17N40 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum drain‑source voltage for the FQAF17N40?
The device is rated for a maximum drain‑source voltage of 400 V.
What is the typical gate charge of the FQAF17N40?
The typical gate charge is about 45 nC.
What is the maximum drain‑source voltage for the FQAF17N40?
The maximum drain‑source voltage is 400 V.
What continuous drain current can the FQAF17N40 handle at 25 °C?
It can handle a continuous drain current of 12.2 A at 25 °C.