Automotive R²Coupler™ Basic Gate Drive Optocoupler

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The Avago ACPL-K33T is an automotive grade 2.5A gate drive optocoupler device. The device contains an AlGaAs LED, which is optically coupled to an integrated circuit with a power output stage. The ACPL-K33T features fast propagation delay and tight timing skew, and is designed for driving IGBTs and SiC power MOSFETs used in AC-DC and DC-DC converters. The wide operating Vcc range and high peak output current make the device ideally suited for direct driving IGBTs and SIC MOSFETs at high frequency with high power efficiency.

Avago R²Coupler™ isolation products provide the reinforced insulation and reliability needed for critical automotive and high temperature industrial applications.


  • Qualified to AEC-Q100 Grade 1 Test Guidelines
  • Operating Temperature Range: -40°C to +125°C 
  • Peak Output Current: 2.5A min. 
  • Propagation Delay: 120ns max. 
  • Dead Time Distortion Range: -40ns to +50ns
  • Wide Operating VCC Range: 15 to 30V
  • Low Supply Current Allowing Bootstrap Half-bridge Topology: ICC = 4.2mA max.
  • LED Current Input Drive with Hysteresis
  • High Common Mode Rejection (CMR): >50 kV/μs at VCM = 1500 V
  • Compact SSO-8 Package with 8mm Clearance and Creepage
  • Regulatory Approvals:
    – UL1577, CSA (5000VRMS for 1min)
    – IEC/EN/DIN EN 60747-5-5 (VIORM = 1140VPEAK)
  • Available Options:
    • 500 = Tape and Reel Packaging Option
    • XXXE = Lead Free Option


  • Automotive Isolated IGBT or SiC MOSFET Gate Drive
  • Automotive Powertrain DC-DC Converter
  • EV /  PHEV Charger
  • AC and Brushless DC Motor Drives

Lifecycle Status


Replacement Part


  • RoHS
    Pb-free options

Lifecycle Status


Upgrade Part

Substance Compliance

  • RoHS
    Pb-free options
Specification Value
Lifecycle Active
Distrib. Inventory Yes
Samples Available Yes
Product Type Automotive Optocoupler
CMR (min.) (V/µs) 50000.0
Vcm (V) 1500.0
IF Min. (mA) 7.0
RoHS6 Compliant Pb-free options only
Max Qty of Samples 20
Operating Temperature Range -40°C to +125°C
Package Stretched SO8
UL Insulation Rating Viso (VRMS) 5000.0
IEC Maximum Working Insulation Voltage Viorm (VPEAK) 1140.0


Data Sheet (1) i
Options Data Sheet (2) i
Reliability Data Sheet (3) i

Optional Products


Automotive R2Coupler™ Basic Gate Drive Optocoupler