EL817(S)(B)(TA)-G

Overview

The EL817(S)(B)(TA)-G is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It features an infrared emitting diode optically coupled to an NPN phototransistor, housed in a surface-mount DIP-4 package with lead bends for SMD mounting. The device provides high isolation voltage of 5000 Vrms between input and output circuits. Key electrical parameters include a collector-emitter breakdown voltage of 35 V minimum, a maximum forward current of 50 mA, and a typical rise/fall time of 4 µs / 3 µs. The unit weight is 260 mg.

Feature Summary

• Surface-mount compatible design with bent leads for direct PCB mounting
• High insulation voltage capability for circuit isolation
• RoHS compliant and halogen-free construction
• Single channel configuration with NPN phototransistor output

Applications

• Signal transmission between circuits of different potentials
• Programmable logic controllers
• Telecommunication equipment interfaces
• Home appliance control systems

Procurement Notes

Verify the specific suffix TA indicates tape and reel packaging type I as per official documentation. Confirm RoHS compliance status through the manufacturer's latest environmental declaration. Ensure the bent lead configuration matches the target footprint requirements. Check for any updated safety approvals such as UL or VDE recognition numbers relevant to the final assembly.

Selection Notes

Select this component when surface-mount technology is required for standard DIP-4 form factor applications. The bent lead design facilitates automated placement while maintaining mechanical stability. Consider the 5000 Vrms isolation rating for applications requiring robust galvanic separation. Verify that the NPN output interface aligns with the downstream logic or driver circuit requirements.

Part Context

This part belongs to the EL817-G series of photocouplers from Everlight Electronics. The series offers various packaging options including through-hole DIP and surface-mount variants. The EL817 family is widely recognized for general-purpose signal isolation in industrial and consumer electronics. The specific suffix denotes the surface-mount variant with tape and reel availability.

Replacement Considerations

Direct substitutes within the same series include EL817(S)(A)(TA)-G and EL817(S)(C)(TA)-G, which share identical pinouts and mechanical dimensions but differ in Current Transfer Ratio (CTR) bins. Cross-brand replacements must be verified for matching isolation voltage, pin configuration, and thermal characteristics.