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The onsemi 4N25SM is a surface-mount optocoupler featuring a single channel with a gallium arsenide infrared emitting diode and a silicon phototransistor output. It provides electrical isolation with a maximum working insulation voltage of 850V and a withstand overvoltage of 6000V. The device operates within a temperature range of -40°C to +100°C, supports a maximum input current of 60mA, and offers a minimum current transfer ratio of 20% at IF=10mA and VCE=10V.
Verify the specific suffix (e.g., R2M) against official datasheets to confirm package type and tape-and-reel specifications. Ensure the selected variant matches the required isolation voltage ratings and operating temperature range for the target application environment.
Select this component when surface-mount technology is required for single-channel isolation. Confirm that the 6-pin SMD footprint fits the PCB layout constraints. Verify that the phototransistor output characteristics meet the load requirements of the downstream circuitry.
This part belongs to the 4N25 series of optocouplers, which are widely used for basic isolation tasks. The SM designation indicates a surface-mount package variant, differing from through-hole versions like the 4N25M while maintaining similar functional core components.
Check for direct pin-compatible surface-mount alternatives from other manufacturers if supply is constrained. Ensure any substitute maintains the same DIP-6 SMD footprint and comparable isolation voltage ratings.