NSL-32H-103

Overview

The NSL-32H-103 is a photocell output optocoupler manufactured by Advanced Photonix. It consists of an LED input optically coupled to a cadmium sulfide (CdS) photocell. The device provides electrical isolation between input and output circuits. Key specifications include a maximum forward current of 20 mA, a forward voltage of 2.5 V, and a reverse voltage rating of 4 V. The power dissipation is rated at 50 mW. It offers an insulation voltage of 2000 VRMS. The operating temperature range extends from -40°C to +75°C. The component is available in bulk packaging.

Feature Summary

• Optical coupling between an infrared LED and a CdS photocell for signal transmission
• High electrical isolation capability with 2000 VRMS insulation voltage
• Light-dependent resistance output characteristic suitable for analog or switching applications

Applications

• Isolated sensor interfaces
• Analog signal transmission across isolation barriers
• Power supply feedback loops requiring galvanic isolation

Procurement Notes

Verify the specific suffix and packaging configuration required for your assembly process. Confirm RoHS compliance status as indicated in official documentation, noting that some listings may indicate non-compliance. Ensure the selected variant matches the required lead frame and encapsulation type for your thermal and mechanical constraints. Cross-reference the manufacturer part number with distributor catalogs to confirm availability and exact datasheet version before ordering.

Selection Notes

Select this component when high isolation voltage is required alongside light-dependent resistance characteristics. Consider the slow response time inherent to CdS cells compared to photodiode outputs. Evaluate the illuminated resistance range and dark resistance values against your circuit requirements. Ensure the operating temperature range meets your environmental conditions. Verify that the input current limits are respected within your drive circuit design.

Part Context

The NSL-32H series represents Advanced Photonix's line of photocell output optocouplers. These devices utilize cadmium sulfide photoresistors as the sensing element. They are distinct from phototransistor or photodiode output types due to their resistive output nature. The series is designed for applications requiring simple interface circuits and high isolation voltages. The NSL-32H-103 is a specific variant within this family, characterized by its standard package and electrical ratings.

Replacement Considerations

Direct replacements must match the photocell output type and isolation voltage. Compare illuminated resistance values and response times with alternatives like the NSL-32SR3 or NSL-33-007. Verify pinout compatibility and package dimensions for direct substitution. Check if the alternative component meets the same thermal and electrical specifications.