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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)：15% @ 10mA
- Current Transfer Ratio (Max)：-
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：10µs, 10µs (Max)
- Input Type：DC
- Output Type：Transistor
- Voltage - Output (Max)：30V
- Current - Output / Channel：30mA
- Voltage - Forward (Vf) (Typ)：1.3V (Max)
- Current - DC Forward (If) (Max)：40 mA
- Vce Saturation (Max)：300mV
- 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 3N243 is a high-reliability optically coupled isolator manufactured by TT Electronics. It integrates an infrared emitting diode and an NPN silicon phototransistor within a hermetically sealed TO-72 package. The device utilizes an 880 nm wavelength for signal transmission, ensuring effective optical coupling between input and output circuits. With lead spacing of 0.50 inches (12.70 mm), it supports robust electrical isolation requirements in demanding environments.
Feature Summary
- Hermetically sealed TO-72 package construction
- High current transfer ratio performance
- Optical isolation between input and output
Applications
- High-voltage isolation between input and output
- Electrical isolation in dirty environments
- Industrial equipment control systems
- Medical equipment signal isolation
Procurement Notes
Verify the specific datasheet revision and manufacturer origin when sourcing, as multiple suppliers list this part number. Confirm that the received component matches the TO-72 hermetic package specification and includes the required 0.50-inch lead configuration. Ensure compliance with MIL-PRF-19500 processing standards if specified for your application requirements.
Selection Notes
Select the 3N243 when high reliability and hermetic sealing are critical for long-term stability. The 880 nm wavelength provides distinct spectral characteristics compared to other variants. Consider the TO-72 form factor for applications requiring through-hole mounting with established lead spacing constraints.
Part Context
This component belongs to a family of high-reliability optocouplers designed for harsh conditions. Similar models like the 3N245 share the same physical package but may differ in internal wavelength specifications. The 3N243 specifically employs an 880 nm emitter, distinguishing it from variants using different wavelengths within the same product line.
Replacement Considerations
The 3N245 is a confirmed substitute within the same series, sharing the TO-72 package and general functionality. Verify that the replacement meets the specific electrical isolation and current transfer ratio requirements of the original design.
