4N37S

Transistor, Photovoltaic Output Optoisolators Overview

The Lite-On 4N37S is a single-channel transistor output optocoupler housed in a PDIP-6 Gull Wing package. It provides an isolation voltage of 1500 Vrms with an NPN phototransistor output. Key electrical parameters include a maximum collector-emitter voltage of 30 V, a peak forward current of 60 mA, and a minimum current transfer ratio of 100%. The device features rise and fall times of 10 µs each, a power dissipation of 350 mW, and operates within a temperature range of -55°C to +100°C.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Provides galvanic isolation between input and output circuits using infrared LED and NPN phototransistor technology.
• Features a standard DIP-6 gull wing package suitable for through-hole mounting applications.
• Includes a base connection on the phototransistor to facilitate faster switching speeds and improved linearity.

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial control systems requiring signal isolation
• Power supply feedback loops
• Solid-state relay driver circuits

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify that the specific procurement order matches the PDIP-6 through-hole package configuration rather than surface-mount variants like the 4N37S-TA1. Confirm RoHS compliance status as indicated in official specifications. Ensure the supplier provides valid datasheets confirming the 1500 Vrms isolation rating and 100% CTR minimums before finalizing orders.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a through-hole DIP-6 package is required for mechanical stability or existing PCB layouts. Choose the 4N37S over surface-mount alternatives if automated SMT assembly is not utilized. Consider the 10 µs switching speed limitations for high-frequency applications where faster optocouplers may be necessary.

Transistor, Photovoltaic Output Optoisolators Part Context

The 4N37S belongs to the widely used 4N3x series of general-purpose optocouplers manufactured by Lite-On. This series is characterized by its robust isolation capabilities and standard pinout compatibility with other industry-standard devices. The 'S' suffix typically denotes the specific package style and insulation voltage rating within the product family.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-referencing with generic equivalents requires independent verification of pinouts and electrical characteristics against the official Lite-On datasheet.