The Fair-Rite 0431177081 is a Round Cable Snap-It™ ferrite core, designed for EMI suppression in electronic systems. Here's a detailed overview:

 Specifications

• Part Number: 0431177081
• Type: Hinged (Snap-On) Ferrite Core
• Material: Fair-Rite 31 (optimized for EMI suppression from 1 MHz to GHz range)
• Impedance: 375 Ohms @ 100 MHz
• Cable Diameter Range: 2.5 mm (0.100") to 25.4 mm (1.000")
• Inner Diameter (ID): 25.65 mm (1.010")
• Outer Dimensions:
  • Width: 56.39 mm (2.220")
  • Height: 27.43 mm (1.080")
  • Length: 42.93 mm (1.690")
• Mounting: Free hanging
• Case Material: Polypropylene, UL 94 V-0 rated (flame retardant)
• RoHS Compliant: Yes