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Product Detailed Parameters
- Description：MOSFET N-CH 400V 300MA SOT89
- 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)：1.1W (Ta)
- Operating Temperature：-40°C ~ 110°C (TA)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Supplier Device Package：SOT-89
- Package / Case：TO-243AA
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Overview
The CPC3909CTR is a 400V N-channel depletion-mode Field Effect Transistor (FET) manufactured by Littelfuse Inc. It utilizes IXYS Integrated Circuits Division’s proprietary third-generation vertical DMOS process to deliver high-voltage performance in an economical silicon gate structure. The device features a typical on-resistance of 4.5Ω at 25°C and a maximum on-resistance of 9Ω. It operates within a temperature range of -40°C to +110°C and is housed in a SOT-89 package with tape and reel packaging containing 1000 units per reel.
Feature Summary
- Depletion mode operation provides low on-resistance at cold temperatures
- Vertical DMOS process 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
- Converters
Procurement Notes
Verify the specific ordering suffix CTR confirms the SOT-89 package and tape and reel quantity of 1000 units per reel. Confirm that the component is sourced from Littelfuse or authorized distributors to ensure authenticity. Check for preliminary status indicators in documentation, as specifications may be subject to change without notice. Ensure handling procedures comply with ESD sensitivity standards JESD-625 and moisture sensitivity level MSL 1 requirements.
Selection Notes
Select this component for applications requiring normally-on switching behavior and high voltage isolation up to 400V. The depletion mode characteristic makes it suitable for circuits where the default state must be conductive without gate drive power. Consider the SOT-89 package size for space-constrained designs. Evaluate the 4.5Ω typical on-resistance against load current requirements to ensure acceptable power dissipation within the 1.1W package rating.
Part Context
This part belongs to the CPC3909 series, which includes variants like the CPC3909Z in a SOT-223 package. Both versions share identical electrical characteristics but differ in physical footprint and power dissipation capabilities. The series is designed for robust performance in difficult environments such as security systems and power supplies, leveraging reliable vertical DMOS technology.
Replacement Considerations
Direct replacements include the CPC3909Z for SOT-223 mounting options. Verify pinout compatibility and thermal resistance differences between SOT-89 and SOT-223 packages when substituting. Ensure any alternative depletion-mode FET matches the 400V drain-to-source voltage rating and similar on-resistance specifications.
