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Product Detailed Parameters
- Description：OPTOISO 1KV TRANS W/BASE TO-78-6
- Series：-
- Mfr：TT Electronics/Optek Technology
- Package：Bulk
- Number of Channels：1
- Voltage - Isolation：1000VDC
- Current Transfer Ratio (Min)：25% @ 10mA
- Current Transfer Ratio (Max)：-
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：15µs, 15µs
- Input Type：DC
- Output Type：Transistor with Base
- Voltage - Output (Max)：35V
- Current - Output / Channel：50mA
- Voltage - Forward (Vf) (Typ)：1.3V (Max)
- Current - DC Forward (If) (Max)：40 mA
- Vce Saturation (Max)：300mV
- Operating Temperature：-65°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-78-6 Metal Can
- Supplier Device Package：TO-78-6
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Overview
The 4N22TX is a single-channel transistor output optocoupler manufactured by TT Electronics/Optek Technology. It features an infrared emitting diode and an NPN silicon phototransistor housed in a hermetically sealed TO-78 metal package. The device provides 1000 Vrms electrical isolation between input and output. Key electrical parameters include a minimum current transfer ratio of 25% at 10 mA forward current, a maximum collector-emitter voltage of 35 V, and a maximum collector current of 50 mA. The unit operates within a temperature range of -55°C to +125°C.
Feature Summary
- Hermetically sealed TO-78 metal package designed for military and harsh environments
- High current transfer ratio with NPN phototransistor output
- Provides 1 kV electrical isolation between input and output circuits
Applications
- High-voltage isolation between input and output
- Electrical isolation in dirty environments
- Industrial equipment signal transmission
- Medical equipment interface circuits
- Office equipment control systems
Procurement Notes
Verify the specific suffix 'TX' indicates processing to MIL-PRF-19500/486 standards when sourcing. Confirm that the component meets the required environmental specifications for the intended application. Ensure compatibility with existing circuit designs regarding pinout and thermal characteristics. Cross-reference datasheets for exact timing parameters if high-speed switching is involved.
Selection Notes
Select this component for applications requiring robust isolation in demanding conditions. The TO-78 package offers superior durability compared to plastic packages. Consider the 25% minimum CTR for logic level interfacing. Verify that the 35 V collector voltage rating suits the load requirements. Check if the base contact feature is necessary for biasing control in the specific design.
Part Context
The 4N22TX belongs to the 4N22 series of optocouplers from TT Electronics/Optek Technology. This series includes variants like 4N22, 4N22A, and 4N22ATX. The TX suffix denotes processing to military reliability standards. These devices are part of a broader family including 4N23, 4N24, and 4N47 series components, all sharing similar structural designs but differing in performance specifications.
Replacement Considerations
The 4N22ATX is a confirmed parameter-equivalent substitute within the same product line. Both share the TO-78 package and military processing standards. Verify pinout compatibility before substitution. Other series members like 4N23 or 4N24 may require circuit adjustments due to different current transfer ratios.
