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Vishay VOS618AT — Optoisolators

VOS618AT Optocoupler, 3750Vrms, 50-600% CTR, 4-SSOP

MPNVOS618AT
End of Life

Vishay VOS618AT optocoupler, DC input, transistor output, 3750Vrms isolation, 50% to 600% CTR at 1mA, 80V output max, surface mount 4-SOIC/4-SSOP, -55°C to 110°C.

$0.62Ref. price · indicative, final on quote
Packaging4-SOIC (0.173", 4.40mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

VOS618AT Technical Specifications
ParameterValue
Input typeDC
Output typeTransistor
Mounting typeSurface Mount
Voltage - isolation3750Vrms
Voltage - output80V
Voltage - forward (Vf)1.1V
Current - output (Channel)50mA
Current transfer ratio600% @ 1mA
Current - DC forward (If)50 mA
Operating temperature-55°C ~ 110°C
PackageTape & Reel (TR); Cut Tape (CT)
Case4-SOIC (0.173\", 4.40mm Width)
Number of channels1
Vce saturation400mV
Rise (Fall time)5µs, 7µs
Turn on (Turn off time)5µs, 8µs

Product details

No last-time-buy or end-of-life notice applies to this date-code window, which simplifies procurement planning for both prototype builds and production runs.

3750Vrms isolation and wide CTR window

Rated for 3750Vrms isolation, this single-channel transistor-output optocoupler suits galvanic isolation in power supplies, motor drives, and industrial interface circuits. The current transfer ratio spans 50% minimum to 600% maximum at a 1mA forward current — a broad window that gives the designer margin when driving logic inputs or low-power loads without needing to overdrive the LED side. Output transistor handles up to 80V and 50mA per channel, with a typical Vce saturation of 400mV. Switching times are moderate — 5µs rise, 7µs fall — making this part a fit for 10-100 kHz isolation barriers rather than high-speed digital isolator applications.

Temperature range and package for industrial environments

Operating temperature from -55°C to 110°C covers industrial, automotive cabin, and outdoor telecom enclosures where commercial-grade optos (0°C to 70°C) would drop out. The 4-SOIC body (4.40mm width) with 4-SSOP supplier package footprint is a common pinout shared across many Vishay and compatible optocouplers, simplifying board layout or last-minute substitution review.

Frequently asked questions

What is the CTR range of VOS618AT?

The current transfer ratio is specified from 50% minimum to 600% maximum, both measured at a forward current of 1mA. This wide range accommodates varying LED drive strengths and load requirements without selecting a tighter bin.

Is VOS618AT compatible with PC817?

Both parts are single-channel transistor-output optocouplers in similar 4-pin SOP packages, but pinouts and CTR ranges differ. The VOS618AT uses a 4-SSOP footprint (4.40mm width) versus the PC817's DIP-4 or SOP-4 variants. Verify the PCB land pattern and CTR requirements before substituting — they are not drop-in replacements across all designs.