Automotive R²Coupler™ Basic Gate Drive Optocoupler

Currently Viewing:

The Broadcom 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.

Broadcom 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


Upgrade Part

Substance Compliance

  • RoHS
    Pb-free options
Specification Value
Lifecycle Active
Distrib. Inventory 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
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
Prop Delay (tPHL) Max. (µs) 120 ns
Prop Delay (tPLH) Max. (µs) 120 ns
Data Sheet1 i
Options Data Sheet3 i
Reliability Data Sheet5 i


Automotive R2Coupler™ Basic Gate Drive Optocoupler