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Product Detailed Parameters
- Description：OPTOISOLTR 1KV 1CH TRANS TO-72-4
- Series：-
- Mfr：TT Electronics/Optek Technology
- Package：Bulk
- Number of Channels：1
- Voltage - Isolation：1000VDC
- Current Transfer Ratio (Min)：30% @ 10mA
- Current Transfer Ratio (Max)：200% @ 10mA
- Turn On / Turn Off Time (Typ)：9µs, 6µs (Max)
- Rise / Fall Time (Typ)：-
- Input Type：DC
- Output Type：Transistor
- Voltage - Output (Max)：50V
- Current - Output / Channel：30mA
- Voltage - Forward (Vf) (Typ)：1.2V (Max)
- Current - DC Forward (If) (Max)：50 mA
- Vce Saturation (Max)：400mV
- Operating Temperature：-55°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-206AF, TO-72-4 Metal Can
- Supplier Device Package：TO-72-4
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Overview
The 3C91CTX is a single-channel transistor output optoisolator manufactured by TT Electronics/Optek Technology. It features an NPN phototransistor output housed in a TO-72-4 metal can package designed for through-hole mounting. The device provides electrical isolation with a maximum insulation voltage of 1000 Vrms. Key electrical parameters include a collector-emitter saturation voltage of 400 mV, a forward current of 10 mA, and a forward voltage of 1.5 V. The unit supports a maximum power dissipation of 200 mW and operates within a temperature range of -55°C to +125°C.
Feature Summary
- Provides galvanic isolation between input and output circuits using optical transmission.
- Features a robust metal can package suitable for high-reliability applications.
- Utilizes an NPN phototransistor output configuration for signal switching.
Applications
- Industrial control systems requiring circuit isolation
- Measurement and testing equipment interfaces
- Power supply feedback loops
Procurement Notes
Verify RoHS compliance status carefully, as some sources indicate the component may contain lead or be non-compliant. Confirm the specific suffix requirements for your project's environmental standards before ordering. Ensure the TO-72-4 package dimensions match your PCB layout constraints. Check for availability of datasheets that explicitly state the lead content for regulatory reporting purposes.
Selection Notes
Select this component when high isolation voltage and ruggedness are required. The metal can package offers superior protection compared to plastic variants. Consider the NPN output type for standard switching applications. Verify thermal management capabilities given the 200 mW power dissipation limit. Ensure the operating temperature range meets the environmental conditions of the target application.
Part Context
The 3C91CTX belongs to the family of transistor output optoisolators from Optek Technology. It is part of the broader portfolio of components designed for electrical isolation in electronic circuits. The TO-72-4 package is a legacy form factor often used in industrial and military applications where reliability is critical. This model represents a standard solution for basic isolated switching tasks.
Replacement Considerations
Direct substitutes include the 3C91C variant, which shares similar specifications but may differ in packaging suffixes or compliance status. Verify pinout compatibility and electrical parameters such as CTR and isolation voltage when cross-referencing other TO-72-4 optoisolators from different manufacturers.
