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Product Detailed Parameters
- Description：MOSFET N-CH 350V 5MA 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)：350 V
- Current - Continuous Drain (Id) @ 25°C：5mA (Ta)
- Drive Voltage (Max Rds On, Min Rds On)：0.35V
- Rds On (Max) @ Id, Vgs：14Ohm @ 50mA, 350mV
- Vgs(th) (Max) @ Id：-
- Gate Charge (Qg) (Max) @ Vgs：-
- Vgs (Max)：±20V
- Input Capacitance (Ciss) (Max) @ Vds：300 pF @ 0 V
- 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 CPC3708CTR is a single N-channel depletion mode MOSFET manufactured by IXYS (Littelfuse). It features a SOT-89-3 surface-mount package and utilizes silicon technology. Key electrical parameters include a drain-source breakdown voltage of 350 V, a continuous drain current of 5 mA, and a drain-source on-resistance of 8 Ohms. The device operates with a gate-source voltage range of -20 V to +20 V and has a threshold voltage of 3.6 V. It supports a power dissipation of 1.1 W and functions within a temperature range of -40°C to +110°C.
Feature Summary
- Depletion mode operation for normally-on functionality
- High voltage isolation capability suitable for sensitive circuits
- Compact surface-mount packaging for space-constrained designs
Applications
- Signal switching in measurement equipment
- Protection circuits requiring high voltage blocking
- Automotive sensor interfaces
Procurement Notes
Verify the manufacturer designation as IXYS or Littelfuse on the component marking and datasheet. Confirm the SOT-89-3 package type matches the design footprint. Ensure the depletion mode characteristic aligns with the circuit requirements, as this differs from standard enhancement mode MOSFETs. Check RoHS compliance status through official documentation.
Selection Notes
Select this component when a normally-on switch is required for high-voltage signal paths. The 350 V breakdown voltage allows use in applications exceeding standard low-voltage limits. The 5 mA current rating restricts usage to low-power signal switching rather than power delivery. Verify thermal management capabilities given the 1.1 W power dissipation limit in the small SOT-89-3 package.
Part Context
This part belongs to the CPC3708 series of solid-state relays and MOSFET switches. It is designed for applications requiring reliable switching with high isolation. The product line emphasizes compact form factors and robust performance in industrial and automotive environments.
Replacement Considerations
Consult official substitution guides for equivalent N-channel depletion mode MOSFETs in SOT-89-3 packages. Verify matching voltage, current, and resistance specifications before replacing.
