4N48U

Transistor, Photovoltaic Output Optoisolators Overview

The 4N48U is a single-channel transistor output optocoupler manufactured by TT Electronics/Optek Technology. It features an NPN phototransistor output and utilizes a TO-78-6 metal can package for through-hole mounting. The device provides an isolation voltage of 1000 Vrms between input and output circuits. Key electrical parameters include a collector-emitter saturation voltage of 300 mV maximum, a power dissipation rating of 300 mW, and a forward voltage of 1.5 V. The unit operates within a temperature range of -55°C to +125°C.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Provides galvanic isolation via an infrared LED and NPN phototransistor pair
• Encapsulated in a hermetically sealed TO-78-6 metal can package
• Supports high insulation voltage ratings for circuit protection

Transistor, Photovoltaic Output Optoisolators Applications

• Signal isolation in industrial control systems
• Interface circuits for microprocessors and logic systems
• Power supply feedback loops requiring high isolation

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify component authenticity and datasheet compliance prior to integration. Confirm that the specific manufacturing lot meets required environmental standards. Ensure handling procedures account for the through-hole metal can packaging format during assembly processes.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a robust, hermetically sealed optical isolator is required for high-reliability applications. The TO-78-6 package offers superior thermal and mechanical stability compared to plastic variants. Consider the 1000 Vrms isolation capability for safety-critical signal transfer between disparate voltage domains.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the 4N4x series of transistor output optocouplers from TT Electronics/Optek Technology. The series is characterized by its use of metal can packages, specifically the TO-78-6 form factor, which distinguishes it from surface-mount alternatives like the 4N47U or 4N49U. These components are designed for applications demanding long-term reliability and radiation hardness.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct substitutes include the standard 4N48 variant. For military-grade specifications, consider the JANTX4N48U or JAN4N48U versions, which share similar functional characteristics but adhere to stricter qualification standards.