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Vishay SFH618A-5 — Optoisolators
Vishay

SFH618A-5 Optoisolator, 5300Vrms, 4-DIP Through Hole

MPNSFH618A-5
End of Life

Vishay SFH618A-5 optocoupler, 1-channel DC-input transistor output, 5300Vrms isolation, 250-500% CTR at 1mA, 55V output max, 4-DIP through-hole package, -55 to 100°C, ROHS3.

$1.1Ref. price · indicative, final on quote
SFH618A-5 datasheet
Packaging4-DIP (0.300", 7.62mm)
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

SFH618A-5 Technical Specifications
ParameterValue
Input typeDC
Output typeTransistor
Mounting typeThrough Hole
Voltage - isolation5300Vrms
Voltage - output55V
Voltage - forward (Vf)1.1V
Current - output (Channel)50mA
Current transfer ratio500% @ 1mA
Current - DC forward (If)60 mA
Operating temperature-55°C ~ 100°C
PackageTube
Case4-DIP (0.300\", 7.62mm)
Number of channels1
Vce saturation400mV
Rise (Fall time)3.5µs, 5µs
Turn on (Turn off time)6µs, 5.5µs

Product details

5300Vrms isolation in a 4-DIP through-hole package

The Vishay SFH618A-5 is a single-channel optocoupler with a phototransistor output, designed for galvanic isolation in industrial, power-supply, and signal-isolation applications. It provides 5300Vrms of isolation voltage in a standard 4-DIP through-hole package, making it a straightforward drop-in for boards that need to separate high-voltage and low-voltage domains without adding a separate isolated DC-DC stage. The current transfer ratio (CTR) is specified at 250% minimum and 500% maximum when the forward current is 1mA, which gives a wide margin for driving logic inputs or low-current loads. The transistor output can handle up to 55V and 50mA continuous, with a typical Vce saturation of 400mV at the rated forward current. This suits 50/60 Hz line-frequency isolation, relay drivers, PLC input modules, and general-purpose status feedback where sub-microsecond timing is not required.

Temperature range and operating environment

The 100°C ceiling is the junction limit, so derate the output current if the board runs near that boundary for extended periods. The forward voltage is typically 1.1V at the rated forward current, and the maximum DC forward current is 60mA, so a simple series resistor from a 3.3V or 5V logic rail sets the LED drive without exceeding the absolute maximum.

Frequently asked questions

What is the current transfer ratio of SFH618A-5?

The CTR is 250% minimum and 500% maximum, measured at a forward current of 1mA. This wide range means the part can drive a standard logic input or a small relay coil with plenty of headroom, but the design must tolerate the full spread across temperature and production lots.

What is the difference between SFH618A-5 and SFH618A-3?

The SFH618A-5 and SFH618A-3 are both single-channel transistor-output optocouplers in the same 4-DIP package with the same 5300Vrms isolation rating. The difference is the CTR bin: the SFH618A-5 guarantees 250% to 500% at 1mA, while the SFH618A-3 covers a lower range (100% to 200% at 1mA). The -5 bin gives more drive current margin for loads that need it; the -3 bin is sufficient for standard logic-level interfacing and may be cheaper or more available.