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Renesas Electronics PS2911-1-V-AX — Optoisolators

PS2911-1-V-AX NEC Optocoupler, 2500Vrms, DC Input

MPNPS2911-1-V-AX
End of Life

NEC PS2911-1-V-AX single-channel DC-input transistor-output optocoupler, 2500Vrms isolation, 100%–400% CTR at 1mA, 40V/40mA output, 4-Mini-Flat SMD package, -55°C to 100°C operating range.

$5.04Ref. price · indicative, final on quote
Renesas Electronics PS2911-1-V-AX datasheet (PDF)
Packaging4-SMD, Flat Leads
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

PS2911-1-V-AX specifications
ParameterValue
Input typeDC
Output typeTransistor
MountingSurface Mount
Voltage - isolation2500Vrms
Voltage - output40V
Voltage - forward (Vf)1.1V
Current - output (Channel)40mA
Current transfer ratio400% @ 1mA
Current - DC forward (If)50 mA
Operating temperature-55°C ~ 100°C
PackageTape & Reel (TR); Cut Tape (CT)
Case4-SMD, Flat Leads
Channels1
Vce saturation300mV
Rise (Fall time)5µs, 10µs
Turn on (Turn off time)40µs, 120µs

Product details

2500Vrms isolation in a 4-pin mini-flat package

The NEC PS2911-1-V-AX is a single-channel DC-input phototransistor optocoupler rated for 2500Vrms galvanic isolation. It comes in a 4-SMD flat-lead package (supplier device package 4-Mini-Flat) for surface-mount assembly.

CTR range and drive margin

Current transfer ratio is guaranteed between 100% and 400% at a forward current of 1mA. That 4:1 min-to-max spread is typical for phototransistor couplers, but the 100% floor at only 1mA drive means you can run the LED side at low current and still get enough photocurrent to saturate the output transistor. For designs that need to guarantee logic-level output over temperature and LED aging, the 100% minimum CTR at 1mA gives comfortable headroom.

Switching speed and output ratings

Turn-on time is 40µs typical, turn-off time 120µs typical. That's in the range of standard phototransistor couplers — fine for 50/60 Hz AC sensing, relay replacement, or PLC digital inputs, but not for high-speed serial isolation. The output transistor is rated for 40V maximum collector-emitter voltage and 40mA continuous output current, with a saturation voltage of 300mV max at that current.

Frequently asked questions

Is PS2911-1-V-AX RoHS compliant?

Yes, the PS2911-1-V-AX is ROHS3 compliant.

What are the alternatives to PS2911-1-V-AX?

A functional alternative in the same family is the PS2801C-4-V-A, a four-channel version in a DIP package. The single-channel PS2911-1-V-AX uses a smaller 4-Mini-Flat SMD footprint and offers the same 2500Vrms isolation and 100%–400% CTR range, but the PS2801C-4-V-A packs four channels in a strip-package format with similar switching speeds.