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Vishay SFH6156-4T — Optoisolators
Vishay

SFH6156-4T Optocoupler, 5300Vrms, 160-320% CTR

MPNSFH6156-4T
End of Life

Vishay SFH6156-4T optocoupler, 1-channel DC-input transistor output, 5300Vrms isolation, 160-320% CTR at 10mA, 70V output max, 4-SMD Gull Wing surface mount, -55°C to 100°C.

$0.63Ref. price · indicative, final on quote
SFH6156-4T datasheet
Packaging4-SMD, Gull Wing
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

SFH6156-4T Technical Specifications
ParameterValue
Input typeDC
Output typeTransistor
Mounting typeSurface Mount
Voltage - isolation5300Vrms
Voltage - output70V
Voltage - forward (Vf)1.25V
Current - output (Channel)50mA
Current transfer ratio320% @ 10mA
Current - DC forward (If)60 mA
Operating temperature-55°C ~ 100°C
PackageTape & Reel (TR); Cut Tape (CT)
Case4-SMD, Gull Wing
Number of channels1
Vce saturation400mV
Rise (Fall time)2µs, 2µs
Turn on (Turn off time)3µs, 2.3µs

Product details

Galvanic isolation in a 4-SMD gull-wing package

The Vishay SFH6156-4T is a single-channel phototransistor optocoupler providing 5300 Vrms of galvanic isolation between a DC input LED and a transistor output. It comes in a 4-SMD gull-wing package for surface-mount assembly, with the output transistor rated for up to 70 V and 50 mA continuous. The -4T CTR bin guarantees a current transfer ratio between 160% and 320% at a forward current of 10 mA, which determines the LED drive current needed to saturate the output for a given load.

The 160% to 320% CTR range at 10 mA forward current is the key selection parameter. A higher CTR means the output transistor saturates with less LED drive, which reduces the input-side power budget and lets you use a smaller series resistor. The typical forward voltage is 1.25 V, so at 10 mA the LED dissipates about 12.5 mW. The typical turn-on time is 3 µs and turn-off is 2.3 µs, with symmetrical rise and fall times of 2 µs each. For a 10 kbps optocoupler interface those numbers leave comfortable margin; at 100 kbps the switching losses start eating into the output current capability. The 400 mV Vce saturation maximum at the rated output current means the output pull-up resistor sees a clean logic-low within 400 mV of ground.

Active lifecycle and compliance

The gull-wing leads are compatible with standard reflow profiles for 4-SMD packages.

Frequently asked questions

Is SFH6156-4T the same as SFH6156-3T?

No — the -4T and -3T suffixes denote different CTR bins. The SFH6156-4T guarantees 160% to 320% CTR at 10 mA, while the -3T bin covers a lower range. They are otherwise pin-compatible and share the same package and isolation rating, but the CTR difference affects the LED drive design. If your BOM calls for the -3T, the -4T may work with a resistor adjustment, but verify the minimum CTR against your load current requirement.

What is the SFH6156-4T optocoupler?

The SFH6156-4T is a Vishay single-channel phototransistor optocoupler with 5300 Vrms isolation, a 160-320% current transfer ratio at 10 mA, and a transistor output rated for 70 V and 50 mA. It comes in a 4-SMD gull-wing package for surface-mount assembly and operates from -55°C to 100°C.