4WJ41 Dell 28 QSFP 100 GBase-SR4 100 M 850 NM MPO 12 Connector MMF 100GBPS Transceiver Module

The Dell 4WJ41 28QSFP 100GBase-SR4 100Gbps Transceiver 

The Dell 4WJ41 28QSFP 100GBase-SR4 100Gbps transceiver module is a high-performance optical networking component designed for next-generation data center environments that require ultra-fast, reliable, and scalable fiber connectivity. Built to support 100 Gigabit Ethernet transmission over multimode fiber infrastructure, this QSFP28 form factor transceiver delivers efficient short-range optical communication with exceptional stability and low latency. It is widely deployed in enterprise networking, cloud computing architectures, hyperscale data centers, and high-performance computing clusters where bandwidth-intensive workloads demand consistent and high-speed data transfer capabilities.

High-Speed 100GBase-SR4 Optical Transmission Technology

At the core of the Dell 4WJ41 100GBase-SR4 transceiver is a parallel optical transmission system that utilizes four independent transmit lanes and four independent receive lanes. Each lane operates at approximately 25Gbps, collectively achieving a full 100Gbps data rate. This parallel design ensures balanced data distribution across all lanes, reducing congestion and enhancing signal reliability in high-throughput environments. The use of multi-lane architecture also minimizes bottlenecks commonly associated with single-lane high-speed optical transmission systems. This approach is particularly beneficial in large-scale data center interconnects where simultaneous data streams must be transmitted between servers, switches, and storage systems. The 100GBase-SR4 standard ensures that each lane maintains synchronized transmission timing, enabling consistent performance even under heavy network loads.

850nm Wavelength Optimization

The module operates at an 850nm wavelength, which is optimized for multimode fiber transmission. This wavelength is ideal for short-range optical communication because it provides efficient light propagation through fiber cores designed for multimode use. The 850nm spectrum is widely adopted in data center environments due to its compatibility with cost-effective VCSEL (Vertical Cavity Surface Emitting Laser) technology, which reduces overall power consumption while maintaining high signal integrity. The use of 850nm VCSEL technology enhances modulation efficiency and ensures stable optical performance across supported transmission distances. This makes the Dell 4WJ41 transceiver highly suitable for intra-data center connectivity, including switch-to-switch, server-to-switch, and rack-to-rack communication.

MPO-12 Connector Interface and Fiber Compatibility

The Dell 4WJ41 100G SR4 module incorporates an MPO-12 (Multi-fiber Push-On 12) connector interface, which is specifically designed to support high-density fiber optic connectivity. The MPO-12 connector allows twelve fiber strands to be terminated within a single compact connector, significantly reducing cable clutter and improving airflow within network racks. This design is essential in modern data centers where space optimization and cable management efficiency are critical performance factors. The MPO-12 interface also ensures precise alignment between optical fibers, minimizing insertion loss and maximizing signal integrity. The push-pull locking mechanism enables quick installation and removal, which is particularly useful in dynamic environments where rapid hardware scaling and maintenance are required.

Compatibility with Multimode Fiber Infrastructure

The module is fully compatible with OM3 and OM4 multimode fiber cables, which are commonly used in enterprise and hyperscale data centers. OM3 fiber supports 100G transmission over shorter distances, while OM4 fiber extends the reach further due to its improved modal bandwidth. This flexibility allows network architects to deploy the Dell 4WJ41 transceiver across a variety of structured cabling environments without requiring significant infrastructure modifications. The ability to operate efficiently over existing multimode fiber infrastructure makes this module a cost-effective solution for upgrading legacy 10G and 40G networks to 100G performance levels. It eliminates the need for complete fiber replacement, thereby reducing both deployment time and operational costs.

Energy Efficiency and Thermal Management

The Dell 4WJ41 module is designed with power efficiency in mind, utilizing low-power VCSEL technology and optimized circuit design to reduce energy consumption. This is particularly important in large-scale deployments where hundreds or thousands of transceivers operate simultaneously. Lower power usage translates directly into reduced operational costs and improved data center sustainability. In addition to energy efficiency, the module incorporates effective thermal management mechanisms that help maintain stable operating temperatures. This ensures consistent performance even under continuous high-load conditions, preventing overheating and extending the overall lifespan of the hardware.

QSFP28 Form Factor Standard

The QSFP28 form factor of the Dell 4WJ41 transceiver is a widely adopted industry standard for 100G optical modules. This compact design allows multiple transceivers to be installed in high-density switch environments without consuming excessive rack space. The form factor also supports hot-swappable functionality, enabling maintenance or upgrades without system downtime. The standardized QSFP28 interface ensures compatibility with a broad range of networking equipment, making the Dell 4WJ41 a versatile choice for multi-vendor network environments.

Hot-Swappable Functionality

The module supports hot-swappable installation, enabling network administrators to replace or upgrade transceiver units without shutting down the system. This capability is essential in mission-critical environments where downtime must be minimized. The design ensures seamless integration with compatible Dell networking hardware, maintaining continuous service availability while allowing dynamic infrastructure scaling.

OM3 and OM4 Fiber Support

The Dell 4WJ41 28QSFP 100GBase-SR4 module is compatible with OM3 and OM4 multi-mode fiber types, which are commonly used in structured data center cabling systems. OM3 fiber supports reliable transmission distances up to approximately 70 meters at 100Gbps, while OM4 fiber extends this range up to 100 meters under optimal conditions. These distances make the module ideal for intra-data center connectivity, including switch-to-switch and switch-to-server links.

Integration with PowerEdge and Networking Switches

The Dell 4WJ41 transceiver is designed to integrate seamlessly with compatible Dell PowerEdge servers and Dell Networking switches that support QSFP28 interfaces. This ensures plug-and-play functionality within Dell-centric infrastructures, reducing configuration complexity and improving deployment efficiency.