Molex 74763-0020 Universal Loopback Adapter

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Molex 74763-0020 Universal Loopback Adapter

Overview & Specifications

• The Molex 74763-0020 is a QSFP+ Universal Loopback Adapter, designed for high-speed module-to-board testing. It features 0 dB impedance, a serial ID port, and an I²C expander interface

• Key details (from Octopart, Mouser, Datasheets.com, etc.):

  • Series: 74763

  • Application: QSFP+ interconnect loopback adapter

  • Impedance: 100 Ω

  • Ports: 0 dB, includes serial ID and I²C port

  • Color: Blue (light blue)

  • Contact Material: Zinc die cast

  • Flammability Rating: UL94 V-0

  • Gender: Female (i.e., adaptor plugs into QSFP port)

  • Mounting Style: Plug, horizontal through-hole

  • Voltage Rating: 3.3 V

  • Packaging: Tray, factory pack quantity 15

  • Shielding: Unshielded

  • Weight: Approx. 1.03 oz (~29 g)

Lifecycle & Availability

• The part is listed as Obsolete—Mouser classifies its lifecycle status as “Obsolete,” and Digi-Key confirms it is no longer manufactured, with an obsolescence PCN dated September 1, 2022

• Molex’s own site shows limited information, indicating that the part is not formally published in their current catalog, which is another sign of reduced availability