4N35SMT&R

Transistor, Photovoltaic Output Optoisolators Overview

The 4N35SMT&R is a single-channel optocoupler manufactured by Isocom Components 2004 LTD. It features a transistor output with base access, providing 4170Vrms isolation voltage. The device operates within a temperature range of -40°C to 100°C and utilizes a surface-mount 6-SMD package. Key electrical specifications include a maximum forward current of 60 mA, a collector-emitter saturation voltage of 400mV, and a typical switching time of 3µs on and 3µs off.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Provides galvanic isolation between input and output circuits via an internal LED and phototransistor.
• Includes a dedicated base terminal on the output transistor for improved switching speed control.

Transistor, Photovoltaic Output Optoisolators Applications

• Signal isolation in digital communication interfaces
• Switching power supply feedback loops
• Microcontroller input/output isolation

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm lot codes and date codes against current production standards. Ensure storage conditions comply with moisture sensitivity levels specified in the datasheet. Validate pin configurations match the 6-SMD SOT-89 footprint before integration into PCB designs.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when base-controlled switching speed is required over standard transistor outputs. Compare CTR ranges and isolation voltages against alternative models like the MOC81043SD if higher isolation is needed. Ensure the 60mA forward current limit aligns with the driving circuit capabilities.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the 4N35 series of optocouplers, widely used for general-purpose signal isolation. It serves as a surface-mount alternative to through-hole variants, maintaining similar electrical characteristics while enabling automated assembly processes in compact electronic designs.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct replacements may include other 4N35-series variants from different manufacturers. Verify pin compatibility and electrical parameters such as CTR and isolation voltage before substitution.

Transistor, Photovoltaic Output Optoisolators FAQ

What is the purpose of the base terminal on the output transistor?

The base terminal allows for external connection to improve turn-off speed and reduce storage time, enhancing overall switching performance compared to base-less configurations.

What is the maximum operating temperature for this device?

The device supports an operating temperature range up to 100°C.