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onsemi CNY17F3SR2M — Optoisolators

CNY17F3SR2M onsemi Optoisolator – 4170Vrms

MPNCNY17F3SR2M
Active

onsemi CNY17F3SR2M, single-channel DC-input transistor-output optocoupler, 4170Vrms isolation, 100–200% CTR at 10mA, -40°C to 100°C, 6-SMD Gull Wing package, Tape & Reel.

$0.7500Ref. price · indicative, final on quote
onsemi CNY17F3SR2M datasheet (PDF)
Packaging6-SMD, Gull Wing
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

CNY17F3SR2M specifications
ParameterValue
Input typeDC
Output typeTransistor
MountingSurface Mount
Voltage - isolation4170Vrms
Voltage - output70V
Voltage - forward (Vf)1.35V
Current - output (Channel)50mA
Current transfer ratio200% @ 10mA
Current - DC forward (If)60 mA
Operating temperature-40°C ~ 100°C
PackageTape & Reel (TR) Cut Tape (CT)
Case6-SMD, Gull Wing
Channels1
Vce saturation400mV
Rise (Fall time)4µs, 3.5µs (Max)
Turn on (Turn off time)2µs, 3µs

Product details

Current Transfer Ratio — the real design margin

The CNY17F3SR2M: CTR is specified at 100% minimum and 200% maximum at If=10mA, Vce=5V. The 400mV Vce(sat) ceiling at 50mA output ensures the output stays in saturation across the load range.

Temperature range and package — board-fit note

The 6-SMD Gull Wing footprint sits flat on the solder paste for standard reflow.

Sourcing posture — active, no LTB on record

For a BOM cost engineer: the surface-mount reel variant (SR2) is the most widely stocked format; the through-hole CNY17F3M is a pin-compatible alternative.

Frequently asked questions

Can CNY17F3SR2M replace the through-hole CNY17F3M?

Electrically they are identical — same CTR range, same isolation voltage, same switching speeds. The difference is package: CNY17F3SR2M is surface-mount Gull Wing (6-SMD) on tape-and-reel; CNY17F3M is through-hole DIP-6 in tube. If your board has DIP-6 holes, the through-hole part is a drop-in. If your board is reflow-only, use the SR2 variant.

What is the closest functional second-source for CNY17F3SR2M?

The CNY17F4SR2VM is the next CTR bin up — it guarantees 200% to 400% CTR at 10mA. Pin-compatible, same package, same isolation. Use it when you need more output current margin at a lower LED drive current. The CNY17F2SR2M is the lower CTR bin (63% to 125%).