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onsemi CNY171SR2M — Optoisolators

onsemi CNY171SR2M Optoisolator, 4170Vrms, 6-SMD Gull Wing

MPNCNY171SR2M
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onsemi CNY171SR2M single-channel DC-input optoisolator, 4170 Vrms isolation, transistor with base output, 40-80 % CTR at 10 mA, 70 V output max, 6-SMD Gull Wing surface mount.

$0.7500Ref. price · indicative, final on quote
onsemi CNY171SR2M datasheet (PDF)
Packaging6-SMD, Gull Wing
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

CNY171SR2M specifications
ParameterValue
Input typeDC
Output typeTransistor with Base
MountingSurface Mount
Voltage - isolation4170Vrms
Voltage - output70V
Voltage - forward (Vf)1.35V
Current - output (Channel)50mA
Current transfer ratio80% @ 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

Isolation and signal integrity for industrial interfaces

The CNY171SR2M: Output is a phototransistor with base access, rated for 70 V collector-emitter and 50 mA continuous current, so it can drive a relay coil or a logic gate directly without a buffer stage.

Turn-on and turn-off times are 2 µs and 3 µs typical, with rise and fall times of 4 µs and 3.5 µs max — fast enough for 10 kHz serial data or PWM feedback from a motor encoder without pulse-width distortion. Forward voltage is 1.35 V typical at 10 mA, and the LED can handle up to 60 mA DC peak — so a 24 V supply with a 2.2 kΩ series resistor delivers the 10 mA test current comfortably.

Package and PCB fit

Housed in a 6-SMD Gull Wing package (6-SMD supplier device package), the CNY171SR2M sits flat on the board surface — the gull-wing leads self-centre during reflow and allow visual inspection of the solder joints.

Frequently asked questions

Where can I buy CNY171SR2M and check availability?

Sourced through independent distribution — submit an RFQ for current pricing and lead time.

Can CNY171SR2M replace 4N25SR2M in an existing design?

Both are single-channel DC-input optoisolators in a 6-SMD Gull Wing package with transistor-with-base output. The CNY171SR2M offers 4170 Vrms isolation vs 4170 Vrms on the 4N25SR2M, and a slightly lower Vce saturation (400 mV vs 500 mV). Switching speed and CTR ranges differ — confirm the timing and gain margins against your load before substituting.