DC-Input Lead Free General Purpose Phototransistor Optocoupler

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The HCPL-181-000E optocoupler contains a light emitting diode optically coupled to a phototransistor. It is packaged in a 4-pin mini-flat SMD package with a 2.0 mm profile. The small dimension of this product allows significant space saving. The package volume is 30% smaller than that of conventional DIP type. Input-output isolation voltage is 3750 Vrms. Response time, tr, is typically 4 ms and minimum CTR is 50% at input current of 5 mA.



  • Current Transfer Ratio (CTR: min. 50% at IF = 5 mA, VCE = 5 V)
  • High input-output isolation voltage (Viso = 3750 Vrms)
  • High collector-emitter voltage (VCEO = 80 V)
  • Response time (tr: typ., 4 us at VCE = 2 V, IC = 2 mA, RL = 100 Ohms)
  • Mini-flat package (2.0 mm profile) in tape and reel package
  • UL approved
  • CSA approved
  • IEC/EN/DIN EN 60747-5-2 approved
  • Options available are:
    060E = IEC/EN/DIN EN 60747-5-2 Option
    00AE = Rank Mark A
    00BE = Rank Mark B
    00CE = Rank Mark C
    00DE = Rank Mark D


  • I/O interfaces for computers
  • System appliances, measuring in-struments
  • Signal transmission between circuits of different potentials and impedances
  • Feedback circuit in power supply

Lifecycle Status


Substance Compliance

  • RoHS
    Pb-free options
Specification Value
Lifecycle Active
Distrib. Inventory Yes
Absolute Max. If (mA) 50
BVCEO (V) 80
CTR Max. (%) 600
CTR Min. (%) 50.0
IF Min. (mA) 50.0
Input Current Ma Uom mA
RoHS6 Compliant Pb-free options only
Package SO4
Product Type Phototransistor Optocoupler
Turn Off Time (msec) 0.004
Turn On Time (msec) 0.003
UL Insulation Rating Viso (VRMS) 3750.0
VDD2 (V) 80.0
VCE(SAT) max (V) 20
Vf max (V) 1.4
IF Min. (mA) 50 mA
Application Note2 i
Brochures2 i
Design Guide1 i
Options Data Sheet3 i
Product Change Notice (PCN)6 i
Regulatory Certificate1 i
Selection Guide2 i
White Papers2 i
FAQs1 i
Promotional Material1 i