IL4208

Overview

The Vishay IL4208 is a high-speed phototriac output optocoupler featuring a gallium arsenide infrared LED coupled to a triac detector. It provides an isolation voltage of 5300Vrms and supports a maximum continuous output current of 300mA with a breakover voltage of 600V. The device operates within a temperature range of -55°C to +100°C, includes a static dV/dt rating of 10kV/µs, and utilizes a 6-DIP package.

Feature Summary

• High-speed switching capability for efficient signal transmission
• Robust insulation barrier ensuring safe galvanic isolation
• Low input current requirement for reduced power consumption
• High noise immunity against transient voltage spikes

Applications

• Solid-state relay driver circuits
• Motor control systems requiring isolated switching
• Industrial automation interface modules
• Power supply feedback loops

Procurement Notes

Verify the specific suffix (e.g., X007, X009) to confirm the correct package type, as standard IL4208 denotes through-hole while suffixes indicate surface mount variants. Confirm RoHS compliance status and safety agency approvals such as UL or VDE are required for your specific design implementation before finalizing procurement.

Selection Notes

Select this component when high dv/dt immunity and fast switching speeds are critical for the application. Ensure the chosen package variant matches the PCB layout requirements, distinguishing between standard DIP and SMD options. Verify that the 600V breakover voltage meets the load requirements and that the operating temperature range aligns with environmental conditions.

Part Context

This device belongs to the IL420 series of optocouplers designed for general-purpose isolation applications. It integrates a GaAs LED with a sensitive triac output to provide reliable switching performance. The series is engineered to meet stringent international safety standards for industrial and commercial equipment isolation requirements.

Replacement Considerations

Check for direct substitutes within the same Vishay family or equivalent devices from other manufacturers offering similar 5300Vrms isolation and triac output characteristics. Ensure pinout compatibility and thermal performance match the original design specifications.

FAQ

Does the IL4208 include a zero-crossing detection circuit?

No, the IL4208 does not feature a zero-crossing circuit; it is designed for random phase triggering applications.

What is the maximum static dv/dt rating of the device?

The device has a minimum static dv/dt rating of 10kV/µs, providing high noise immunity.