DC to 5MBd Galvanic Isolation Fiber Optic Short Link

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The Broadcom Fiber Optic (FO) Short Link AFBR-390500RZ is a cost-effective galvanic isolation device capable of suppressing up to 50 kV of transient peak voltage on a single PCB. Based on 650nm fiber optic technology, the device is suitable for high transient voltage suppresion in applications such as inverters/drives, power electronics, or medical equipment.

The integrated receiver output of the AFBR-390500RZ is compatible with TTL logic families and operates any type of signal from DC up to 5 MBd. The device offers creepage and clearance distances, with a minimum of 101.16 mm.


  • Data transmission at signal rates of DC to 5 MBaud
  • DC coupled receiver with CMOS/TTL output for easy design - no data encoding or digitizing circuitry required
  • High-noise immunity through receiver IC with integrated photodiode
  • Transient voltage suppression of up to 50 kV per IEC 60664-1
  • Laser class 1 per IEC-60825: Amendment 2001
  • Housing Material UL-V0 with CTI ≥ 600
  • 3.3V or 5V power supply
  • RoHS compliant


  • Drives/Inverters
  • On-board Galvanic Insulation
  • Medium Voltage Power Distributions
  • Medical/X-ray Equipment
  • Regulated Distribution Transformers
  • Smart Grid On-board Insulations

Lifecycle Status


Substance Compliance

  • RoHS6
    Fully Compliant
Specification Value
Lifecycle Active
Data Rate DC-5 MBd
Distrib. Inventory Yes
Emitter LED
RoHS6 Compliant Y
Nominal Optical Wavelength (nm) 650
Pwr Supply In V 3.3V/5V
elek. Interface Input pin-diode
elek. Interface Output CMOS/TTL
Creepage Distance [mm] 101.2
Maximum Transient Voltage, peak [kV] 50
Maximum Transient Voltage, effective [kV] 35.2
Maximum Working Voltage, effective [kV] 12
Maximum Working Voltage, peak [kV] 17
ROHS5_NonLeadFree Y
Application Note1 i