Active production — single-channel optoisolator with 4.17 kV isolation
The CNY173VM: The current transfer ratio (CTR) is specified at 100% minimum and 200% maximum when the forward current is 10 mA — a tight bin that guarantees consistent gain across the reel. This matters for designs where the downstream logic threshold depends on the phototransistor's collector current, such as PLC digital inputs or industrial sensor interfaces.
Switching speed and output limits for PLC and industrial I/O
Turn-on time is 2 µs typical, turn-off 3 µs typical, with rise and fall times of 4 µs and 3.5 µs maximum respectively. This places the CNY173VM comfortably in the range for 24 VDC PLC input modules scanning at 1 kHz or below, where the opto's propagation delay adds negligible latency to the fieldbus cycle. The output transistor is rated for 70 V maximum and 50 mA continuous per channel — sufficient to drive a 24 V logic input through a 4.7 kΩ pull-up resistor while staying well within the safe operating area. Vce saturation is clamped at 400 mV maximum, so the voltage drop across the output does not eat into the logic-high margin. Operating temperature spans -40°C to 100°C, covering the industrial enclosure ambient range without derating.
Package and assembly — through-hole 6-DIP in tube
The through-hole 6-DIP footprint is compatible with wave-solder processes and manual insertion — no special moisture sensitivity level (MSL) handling beyond standard ESD precautions for optoisolators.