QSFP-40G-SR4 - Cisco QSFP+ Module Overview
QSFP-40G-SR4 - Cisco QSFP+ Module is a genuine modular capacity expansion product from Cisco, a global name in networking whose platforms are used by enterprises, service providers and data-center operators alike. Belonging to the Cisco family, the QSFP-40G-SR4 unit is built to the original factory specification, so it integrates with existing Cisco deployments predictably and behaves exactly as the platform documentation describes. In the network, it is installed into a compatible chassis slot, where it works alongside the supervisor and line cards to extend the platform’s capabilities.
This unit follows the original factory specification for the Cisco family, covering its intended role without compatibility surprises. Standard mounting, cabling and management practices apply, and it interoperates with surrounding hardware using the same procedures as other Cisco equipment already deployed in the network.
Typical deployments include short-reach data-center interconnects, campus backbone fiber links, and carrier access and metro networks. Organizations commonly source it for refresh programs, capacity expansion and spares management, keeping a tested unit on hand so outages stay short and replacements are predictable. The factory detail for this unit reads: “Cisco 40GBASE-SR4 QSFP Module for MMF”. This makes it a practical choice when original-spec hardware is required at a predictable cost.
Every unit at LinkNewNet is inspected and tested before dispatch, and stock is graded, cleaned and verified for correct operation, including port status, console access and firmware state. Our warranty coverage and responsive technical support protect the purchase after it arrives, and our team can confirm revision levels and software compatibility before you order. For volume requirements we also offer configuration checks and staged delivery options.
Contact our sales team for current availability, lead time and shipping options for the QSFP-40G-SR4. We respond quickly with stock status and a firm quote, so you can plan the refresh or expansion with confidence.
Key Specifications
Applications
Capacity Expansion
Add ports and performance to existing chassis.
Upgrade Path
Modernize aging platforms with compatible modules.
Flexible I/O
Mix copper, fiber and high-speed uplinks.
Buying a Pre-Owned QSFP-40G-SR4
Verify the unit is tested, firmware confirmed, and condition documented. Every unit is fully tested and warranty covered. Contact our team for current stock and availability.
QSFP-40G-SR4 Specifications | |
Dimensions | 13.5 x 18.4 x 72.4 mm |
QSFP Port cabling specifications | |
Cable Type | MMF |
Core Size (microns) | 50.0 50.0 50.0 |
Modal Bandwidth (MHz-km) | 500 (OM2) 2000 (OM3) 4700 (OM4) |
Cable Distance | 30m 100m 150m |
Wavelength (nm) | 850 |
Pull Tab Color | Beige |
Optical characteristics | |
Type | 40GBASE-SR4, 4 lanes, 850 nm MMF |
Transmit Power (dBm) | Max:-1.0 per lane Min:-7.6 per lane |
Receive Power (dBm) | Max:-2.4 per lane Min:-9.5 per lane |
Transmit and Receive | 840 to 860 |
Environmental conditions | |
Commercial temperature | 0 to 70°C (32 to 158°F) |
Storage temperature | -40 to 85°C (-40 to 185°F) |
Regulatory and standards compliance | |
Standards | •GR-20-CORE: Generic Requirements for Optical Fiber and Optical Fiber Cable •GR-326-CORE: Generic Requirements for Single-Mode Optical Connectors and Jumper Assemblies •GR-1435-CORE: Generic Requirements for Multifiber Optical Connectors •IEEE 802.3ba (-SR4, -LR4) •IEEE 802.3ae (-CSR4) •QSFP+ MSA SFF-8436 •SFP+ MSA SFF-8431 and -8461 •RoHS 6 |
Safety
| •Cable jacket of QSFP copper modules is UL E116441 Compliant •QSFP copper cables are ELV Compliant |
QSFP-40G-SR4 - Compatibility Notes
This QSFP-40G-SR4 transceiver/module variant is specified for the reach, wavelength, and form factor indicated in the specifications above. Confirm compatibility with your switch or router platform, including the required coding (Cisco, Juniper, Huawei, H3C) and supported data rate, before ordering.
When building out or refreshing links, match the transceiver variant to the optics budget and distance of each run. Our team can confirm compatibility with specific platforms and provide bulk pricing.
Each QSFP-40G-SR4 unit is tested for correct operation and performance before dispatch, ensuring reliable link establishment on arrival.
