Cisco QSFP-40G-SR4 40GBASE-SR4 QSFP+ Transceiver 850nm MMF MPO-12

Cisco QSFP-40G-SR4 40GBASE-SR4 QSFP+ Transceiver Module

Save up to 80% over new with this genuine refurbished Cisco QSFP-40G-SR4 transceiver module — backed by Reef Telecom's industry-leading 10-year warranty and free shipping on orders over $300.

Key Specifications

• Part Number: QSFP-40G-SR4
• Form Factor: QSFP+ (Quad Small Form-Factor Pluggable)
• Data Rate: 40 Gbps (4x10G lanes)
• Standard: IEEE 802.3ba 40GBASE-SR4
• Wavelength: 850nm (VCSEL)
• Connector: MPO-12 / MTP multi-fiber female
• Fiber Type: Multimode Fiber (MMF) — OM3, OM4, OM5
• Max Distance: 100m (OM3) / 150m (OM4/OM5)
• 4x10G Breakout: Yes — interoperable with 10GBASE-SR and SFP-10/25G-CSR-S interfaces
• Features: Hot-swappable, DDM/DOM support, low power consumption

Compatibility & Use Cases

This Cisco 40G QSFP+ SR4 transceiver is ideal for high-bandwidth data center interconnects, enterprise core and distribution layers, and high-performance computing environments. It supports native 40GbE links over 12-fiber parallel cable or 4x10G breakout mode using an MPO-to-duplex LC breakout cable — perfect for migrating from 10G to 40G infrastructure. Compatible with Cisco Nexus, Catalyst, and ASR series switches and routers.

Free ground shipping on orders over $300. Same-day shipping on orders placed before 4PM EST.

All products include our industry-leading 10 Year Warranty backed by Reef Telecom.