4N35-300E

Overview

The Broadcom Limited 4N35-300E is a single-channel transistor output optocoupler housed in a PDIP-6 Gull Wing package. It features an NPN phototransistor output with a maximum collector-emitter voltage of 30 V and a peak collector current of 100 mA. The device provides an insulation voltage of 3550 Vrms, ensuring robust electrical isolation. Key electrical parameters include a minimum current transfer ratio of 100%, a forward voltage of 1.5 V at 60 mA forward current, and a power dissipation rating of 350 mW. Operating temperatures range from -55°C to +100°C, with rise and fall times specified at 10 µs each.

Feature Summary

• Provides galvanic isolation between input and output circuits using an infrared LED and NPN phototransistor configuration.
• Features a standard six-pin gull-wing lead frame suitable for through-hole mounting applications.
• Designed for reliable signal transmission across isolated boundaries with high common-mode transient immunity.

Applications

• Industrial control systems requiring circuit isolation
• Power supply feedback loops for voltage regulation
• Signal interfacing between microcontrollers and high-voltage loads

Procurement Notes

Verify the specific suffix '300E' corresponds to the required RoHS compliance status and packaging format before ordering. Confirm that the PDIP-6 package dimensions align with the target PCB footprint. Ensure the operating temperature range meets the environmental requirements of the final assembly. Cross-reference the manufacturer part number against official datasheets to confirm pinout compatibility.

Selection Notes

Select this component when a standard general-purpose optocoupler with moderate speed is sufficient for the application. The 10 µs switching time makes it suitable for lower frequency digital signaling rather than high-speed data communication. Consider the 100% minimum CTR for logic level shifting where consistent gain is required. Evaluate thermal management needs given the 350 mW power dissipation limit in enclosed environments.

Part Context

The 4N35 series represents a widely used family of single-channel optocouplers known for their versatility in basic isolation tasks. The 4N35-300E variant specifically denotes the version compliant with specific regulatory standards and packaging configurations defined by Broadcom. This part serves as a foundational component in electronic design for separating noisy or high-voltage sections from sensitive low-voltage control logic.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical specifications carefully if considering alternative generic transistor-output optocouplers, as performance characteristics may vary significantly between manufacturers.