JANTX4N49

Transistor, Photovoltaic Output Optoisolators Overview

The JANTX4N49 is a hermetically sealed, single-channel transistor output optocoupler manufactured by TT Electronics/Optek Technology. It features an infrared emitting diode coupled to an NPN silicon phototransistor within a TO-78-6 package. The device provides 1000 Vrms insulation voltage and supports a collector current of up to 50 mA with a maximum collector-emitter voltage of 40 V. It operates within a temperature range of -55°C to +125°C, ensuring reliability in harsh environments.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Hermetically sealed TO-78 package designed for military and harsh environments
• High current transfer ratio ranging from 200% to 1000%
• Base contact provided for conventional transistor biasing
• Collector electrically isolated from the case

Transistor, Photovoltaic Output Optoisolators Applications

• High-voltage isolation between input and output circuits
• Electrical isolation in dirty or noisy industrial environments
• Military equipment requiring MIL-PRF-19500/548 compliance
• Medical and office equipment needing reliable signal coupling

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify that the specific order includes the JANTX suffix, which indicates processing to MIL-PRF-19500/548 standards. Confirm the TO-78-6 package configuration matches the design requirements. Ensure the application environment falls within the specified -55°C to +125°C operating temperature range. Check for RoHS compliance details as indicated in official documentation. Validate that the high current transfer ratio meets the system's switching requirements.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when hermetic sealing and military-grade reliability are required. The TO-78 package offers superior protection against moisture and contaminants compared to standard plastic packages. The base contact allows for flexible biasing configurations. Consider the 50 mA collector current limit for load driving capabilities. The 1000 Vrms isolation rating suits high-voltage applications. Evaluate the 20 us rise/fall times for signal speed requirements.

Transistor, Photovoltaic Output Optoisolators Part Context

The JANTX4N49 belongs to the 4N49 series of optocouplers processed to MIL-PRF-19500/548 specifications. It is part of a family including the 4N47, 4N48, and their variants, all sharing similar functional characteristics but differing in qualification levels. The 'TX' suffix denotes military processing, while 'A' indicates collector isolation from the case. This series is engineered for long-term stability in demanding conditions.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitutes include the 4N49A (collector isolated) and 4N49U (surface mount LCC-6). The 4N49A shares identical electrical parameters but differs in case isolation. The 4N49U offers SMD mounting but has a reduced collector current of 10 mA. Direct pin-to-pin replacement requires verifying package compatibility and current ratings.