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Product Detailed Parameters
- Description：MOSFET N-CH 350V 5MA 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)：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)：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 CPC3708ZTR is a single N-channel depletion mode MOSFET manufactured by IXYS, distributed under the Littelfuse portfolio. It features a silicon construction housed in an SOT-223-3 surface-mount package. Key electrical parameters include a drain-source breakdown voltage of 350 V and a continuous drain current of 5 mA. The device exhibits a drain-source on-resistance of 8 Ohms and operates with a gate-source voltage range of -20 V to +20 V. The threshold voltage is specified at 3.6 V. It supports power dissipation up to 2.5 W and functions within a temperature range of -40 °C to +110 °C.
Feature Summary
- N-channel depletion mode operation for normally-on circuit applications
- High-voltage capability suitable for solid-state switching
- Surface-mount SOT-223-3 packaging for automated assembly
Applications
- Solid-state relay implementations
- Always-on emergency circuits
- Burglar alarm system switching
Procurement Notes
Verify the manufacturer designation as IXYS when sourcing this component, as it belongs to the Clare brand series now part of the Littelfuse portfolio. Confirm the specific suffix 'ZTR' corresponds to the required reel or cut-tape packaging configuration. Ensure compliance with RoHS directives and check for any REACH SVHC declarations relevant to the silicon and epoxy materials used in the SOT-223-3 package before final procurement.
Selection Notes
Select this component for designs requiring a high-voltage, normally-on switch that remains conductive without gate bias. The 350 V rating distinguishes it from standard low-voltage logic-level MOSFETs. Consider the 8 Ohm on-resistance and 5 mA current limit when sizing thermal management solutions. The depletion mode characteristic necessitates negative gate voltage to turn off, which must be accounted for in the control logic design compared to enhancement-mode alternatives.
Part Context
This device is part of the CPC3708 series, which includes variants such as the CPC3708CTR in different packaging options like SOT-89-3. The series represents IXYS's expertise in silicon-based depletion mode FETs designed for reliable solid-state switching in industrial and automotive environments. The ZTR suffix typically denotes tape-and-reel packaging for high-volume surface-mount production lines.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Littelfuse/IXYS cross-reference guides for verified equivalents.
