4N26SR2M

Overview

The 4N26SR2M is a single-channel transistor output optocoupler manufactured by onsemi. It features an infrared LED coupled to an NPN phototransistor with a base lead for improved switching speed and linearity. The device provides high isolation voltage of 4170 Vrms, ensuring safe separation between input and output circuits. It operates within a temperature range of -55°C to +100°C and supports a maximum forward current of 100 mA. The component is housed in a surface-mount SMD-DIP-6 package, suitable for automated assembly processes.

Feature Summary

• Integrates an NPN phototransistor with a dedicated base terminal to enhance switching performance and linearity compared to standard configurations.
• Provides robust electrical isolation with a rated insulation voltage of 4170 Vrms, suitable for safety-critical applications.
• Designed for surface-mount technology using a compact SMD-DIP-6 package to facilitate modern PCB assembly workflows.

Applications

• Industrial control systems requiring signal isolation
• Power supply feedback loops
• Communication interface isolation

Procurement Notes

Verify the specific suffix 'SR2M' to confirm the surface-mount tape-and-reel packaging variant, as standard through-hole versions exist under similar part numbers. Confirm RoHS compliance status and UL recognition details directly from the official datasheet before finalizing procurement specifications. Ensure the ordering code matches the required reel quantity and package style to avoid integration errors.

Selection Notes

Select this component when surface-mount assembly is required alongside the need for enhanced switching characteristics provided by the base lead. Compare the CTR range and isolation voltage against system requirements. Consider thermal management capabilities within the SMD-DIP-6 footprint relative to adjacent components on the board layout.

Part Context

This device belongs to the general-purpose transistor output optocoupler family from onsemi. It shares functional similarities with other 4Nxx series devices but distinguishes itself through its specific surface-mount packaging and optimized internal structure for faster response times. It serves as a direct replacement candidate for legacy through-hole designs where space constraints necessitate SMD solutions.

Replacement Considerations

Direct pin-to-pin replacements may include other SMD variants within the 4N26 family, such as the 4N26SR2T, if available. Verify that substitute parts maintain identical isolation ratings and CTR specifications. Cross-reference mechanical dimensions to ensure compatibility with existing footprints.