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Product Detailed Parameters
- Description：MOSFET N-CH 400V 300MA SOT223
- Series：-
- Mfr：Littelfuse Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- FET Type：N-Channel, Depletion Mode
- Technology：MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss)：400 V
- Current - Continuous Drain (Id) @ 25°C：300mA (Ta)
- Drive Voltage (Max Rds On, Min Rds On)：0V
- Rds On (Max) @ Id, Vgs：9Ohm @ 300mA, 0V
- Vgs(th) (Max) @ Id：-
- Gate Charge (Qg) (Max) @ Vgs：-
- Vgs (Max)：15V
- Input Capacitance (Ciss) (Max) @ Vds：-
- FET Feature：-
- Power Dissipation (Max)：2.5W (Ta)
- Operating Temperature：-40°C ~ 110°C (TA)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Supplier Device Package：SOT-223
- Package / Case：TO-261-4, TO-261AA
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Overview
The CPC3909ZTR is an N-channel, depletion-mode Field Effect Transistor (FET) manufactured by IXYS Integrated Circuits Division. It utilizes a proprietary third-generation vertical DMOS process to deliver high-voltage performance in a compact SOT-223 package. The device features a drain-to-source voltage of 400V and a maximum on-resistance of 9 Ohms at 25°C. It operates within a temperature range of -40°C to +110°C with a total package dissipation of 2.5W.
Feature Summary
- Depletion mode operation provides low on-resistance at cold temperatures
- Vertical DMOS structure prevents thermal runaway and secondary breakdown
- High input impedance with low leakage currents
- PCMCIA compatible small form factor
Applications
- LED Drive Circuits
- Telecommunications
- Normally On Switches
- Ignition Modules
- Power Supplies
Procurement Notes
Verify the manufacturer designation as IXYS Integrated Circuits Division rather than Littelfuse Inc., as the component originates from IXYS. Confirm the specific suffix ZTR corresponds to the SOT-223 tape and reel packaging configuration. Ensure compliance with IPC/JEDEC J-STD-020 moisture sensitivity handling requirements for plastic encapsulated devices.
Selection Notes
Select this component for applications requiring normally-on switching behavior without continuous gate drive power. The 400V rating suits high-voltage isolation needs. Verify that the 9 Ohm maximum on-resistance meets circuit loss constraints. Consider the SOT-223 package dimensions for PCB space limitations compared to the SOT-89 variant.
Part Context
This part belongs to the CPC3909 series, which includes the CPC3909C in an SOT-89 package. Both variants share identical electrical characteristics but differ in physical footprint and power dissipation capabilities. The series is designed for economical silicon gate processes delivering reliable high-voltage MOSFET performance.
Replacement Considerations
The CPC3909CTR serves as the direct package alternative in SOT-89 format. Cross-referencing requires matching the 400V depletion-mode specification and verifying pinout compatibility between SOT-223 and SOT-89 packages.
