NSL-37V5C3/2

Overview

The NSL-37V5C3/2 is a photocell output optocoupler manufactured by Advanced Photonix. It features an internal Cadmium Sulfide (CdS) photoresistor coupled with an infrared LED. The device provides electrical isolation with a rated insulation voltage of 2500 Vrms. Key electrical parameters include a maximum DC forward current of 40 mA, a forward voltage of 2.1 V, and a reverse voltage rating of 4 V. The power dissipation is limited to 50 mW. The component operates within a temperature range of -40°C to +75°C and exhibits rise and fall times of 1.2 ms and 10 ms, respectively.

Feature Summary

• Integrates an infrared LED with a CdS photocell for optical coupling
• Provides high-voltage electrical isolation between input and output circuits
• Offers high OFF-resistance characteristics for effective signal blocking

Applications

• High-voltage switching applications requiring galvanic isolation
• AC line monitoring and detection circuits
• Solid-state relay control interfaces

Procurement Notes

Verify the specific suffix and packaging configuration when ordering, as availability may vary. Confirm that the required insulation voltage and operating temperature range meet the target application specifications. Ensure compatibility with the driving circuit's forward current limits to prevent component damage during procurement validation.

Selection Notes

Select this component for applications necessitating high isolation voltages and slow-speed switching capabilities. The CdS output type is suitable for AC sensing but lacks the speed of phototransistor alternatives. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +75°C range during design selection.

Part Context

This part belongs to the Advanced Photonix family of photocell output optocouplers. These devices utilize Cadmium Sulfide technology to achieve high resistance in the off-state. The series is designed for robust isolation in industrial and power electronics environments where moderate switching speeds are acceptable.

Replacement Considerations

Direct substitutes must match the 2500 Vrms isolation rating and CdS output type. Verify pinout compatibility and package dimensions before integration. Alternative photodiode or phototransistor outputs will differ significantly in switching speed and linearity.