IS3021

Overview

The IS3021 is an optically coupled isolator featuring a Gallium Arsenide infrared emitting diode paired with a light-activated silicon bilateral switch. It functions as a non-zero crossing triac output device housed in a standard 6-pin dual-in-line package. Key electrical specifications include a maximum isolation voltage of 5300 Vrms and a peak blocking voltage of 400V. The component supports a maximum forward current of 0.05 A and operates within a temperature range of -40°C to 100°C.

Feature Summary

• Non-zero crossing triac output configuration for immediate load control
• High isolation voltage capability of 5.3kVRMS
• Integrated light-activated silicon bilateral switch
• Standard 6-pin dual-in-line package construction

Applications

• CRTs
• Power Triac Driver circuits
• Motor control systems
• Consumer appliances
• Printers

Procurement Notes

Verify the specific suffix code on the datasheet or ordering information to confirm the physical package variant. Suffixes such as 'SM' indicate surface mount options, while 'G' may denote lead spread variations. Ensure the selected variant matches the required PCB footprint and mounting style before finalizing procurement orders.

Selection Notes

Select this component when non-zero crossing switching is required for applications demanding immediate triac triggering upon input signal activation. It is suitable for driving AC loads where zero-crossing detection is not necessary. Verify that the 400V peak blocking voltage meets the circuit's voltage requirements and that the 6-pin DIP package fits the available board space.

Part Context

The IS3021 belongs to a family of optically coupled isolators manufactured by Isocom Components. These devices typically combine an infrared LED with a silicon bilateral switch to provide electrical isolation between control and power circuits. The series includes variants with different switching characteristics and package options to suit diverse industrial and consumer electronic designs.

Replacement Considerations

Potential substitutes include other non-zero crossing triac output optocouplers such as the MOC3009X or H11J1X. When replacing, ensure the substitute part maintains compatible isolation voltage ratings, peak blocking voltage, and pinout configurations to guarantee proper circuit functionality without redesign.