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Product Detailed Parameters
- Description：MOSFET N-CH DEP 800V 45OH 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)：800 V
- Current - Continuous Drain (Id) @ 25°C：100mA
- Drive Voltage (Max Rds On, Min Rds On)：0V
- Rds On (Max) @ Id, Vgs：45Ohm @ 100mA, 0V
- Vgs(th) (Max) @ Id：3.1V @ 1µA
- Gate Charge (Qg) (Max) @ Vgs：-
- Vgs (Max)：±15V
- Input Capacitance (Ciss) (Max) @ Vds：105 pF @ 25 V
- FET Feature：-
- Power Dissipation (Max)：2.25W (Ta)
- Operating Temperature：150°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Supplier Device Package：SOT-223-2L
- Package / Case：TO-261-3
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Overview
The CPC3981Z is an N-channel depletion-mode MOSFET rated for 800V drain-to-source breakdown voltage and a maximum junction temperature of 150°C. It features a typical on-resistance of 45Ω at 100mA with a gate-to-source off-voltage range of -1.4V to -3.1V. The device operates in the SOT-223-2L package, providing enhanced lead separation for high-voltage isolation.
Feature Summary
- Depletion-mode operation enables normally-on switching functionality without continuous gate drive power
- Modified SOT-223-2L package design provides increased physical spacing between drain and source terminals
- High input impedance characteristic suitable for low-power control applications
Applications
- Solid state relays
- Telecommunications circuits
- Power supply systems
Procurement Notes
Verify the specific ordering suffix ZTR indicates tape and reel packaging containing 3000 units per reel. Confirm that the component meets the required Moisture Sensitivity Level 3 classification and ESD handling standards before integration into production lines.
Selection Notes
Select this component for designs requiring high-voltage isolation within a compact surface-mount footprint. Ensure the circuit accommodates the typically 45Ω on-state resistance and the negative gate threshold voltage required to maintain the conductive state during normal operation.
Part Context
This part belongs to Littelfuse's integrated circuit portfolio, specifically designed for solid-state relay implementations. It serves as a robust switching element for industrial and telecommunications environments where high voltage blocking capability is essential.
Replacement Considerations
Direct replacement options are not explicitly documented in the provided datasheet. Verify pinout compatibility and electrical ratings against alternative depletion-mode MOSFETs if substitution is necessary.
