HYTOPTODEVICE Arista QSFP-100G-ER4L-S Compatible 100G QSFP28 ER4 Transceiver – 100GBASE-ER4L 1310nm 40km Single-Mode LC Optic, Arista EOS Certified Drop-In Replacement, Bulk Wholesale & Custom Coding Available Product Overview
The Arista QSFP-100G-ER4L-S compatible transceiver is an enterprise-grade 100G QSFP28 ER4 Transceiver, optimized for high-capacity Data Center Interconnects (DCI) and metro networking. Utilizing advanced 1310nm LAN-WDM technology, it delivers a robust 40km reach over Single-Mode Fiber (SMF) with Duplex LC connector. Compliant with QSFP28 MSA, SFF-8636, IEEE 802.3bm, CAUI-4 and full DDM/DOM. this hot-swappable EML laser 100G QSFP28 ER4 Optical Transceiver is engineered for seamless "Plug-and-Play" integration into Arista EOS platforms, providing a high-reliability, low-cost alternative to OEM optics without compromising signal integrity.It is ideal for 100G telecom links, data centers, high-performance computing networks, and enterprise core applications.
Key Technical Specifications
Our high-quality 100G QSFP28 ER4 Transceiver is strictly manufactured, optically calibrated and fully tested in accordance with Arista QSFP-100G-ER4L-S specifications, QSFP28 MSA and IEEE 802.3ba industry standards. Each module undergoes rigorous optical, electrical and protocol compatibility verification to deliver stable, low-BER and reliable 40km long-reach transmission for Arista cloud data center networks. All precise technical parameter values are detailed in the below specification table for professional deployment reference.
| Arista Compatible |
QSFP-100G-ER4L-S |
Vendor Name |
HYTOPTODEVICE |
| Form Factor |
QSFP28 |
Max Data Rate |
103.125Gbps |
| Wavelength |
4 x LAN WDM (1295、1300、1305、1310nm) |
Max Distance |
40KM |
| Connector |
Duplex LC |
Transmitter Type |
4 x LAN WDM EML |
| Cable Type |
SMF |
Receiver Type |
APD |
| TX Power |
-2.9~+4.5dBm |
Receiver Sensitivity |
<-16.9dBm without FEC
<-20.9dBm with FEC |
| Protocols |
100G Ethernet, MSA Compliant |
Power Consumption |
< 4.5W |
Full Compatibility List & Supported Network Hardware
1.Native Arista Compatibility
Every HYTOPTODEVICE 100G QSFP28 ER4 Transceiver undergoes 72-hour continuous high-traffic aging testing and real-machine verification on official Arista EOS platforms. It achieves zero device recognition failure, no system alarm prompts, and complete DDM data display on Arista management interfaces. It can directly replace original Arista QSFP-100G-ER4L-S modules without extra configuration, providing complete test reports for cloud data center and enterprise network projects.
Compatible Arista Device Series:
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Arista 7000 Series Fixed & Modular Data Center Switches
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Arista 7200 Series High-Density 100G/400G Fabric Switches
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Arista 7500 Series Ultra-Large Cloud Data Center Core Switches
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Arista EOS-based Cross-Room DCI Interconnection & Long-Haul 100G Trunk Ports
2.Multi-Brand Cross Compatibility
Built strictly to industry MSA standards, HYTOPTODEVICE’s QSFP-100G-ER4L-S breaks vendor lock-ins, delivering seamless interoperability across diverse network environments.
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Open-Brand Devices (Plug-and-Play): 100% natively compatible with open-architecture brands like Ciena, Fortinet, Ubiquiti, MikroTik, D-Link, Zyxel, and more.
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Locked-Brand Devices (Advanced Coding): Powered by our proprietary EEPROM writing technology, our modules successfully bypass vendor encryptions to ensure 100% compatibility with Cisco, H3C, Juniper, Dell, Intel, and the latest updated Arista firmware versions.
3.Free Custom EEPROM Re-Flash Service
To future-proof your investment, we offer a free firmware re-flash service. If you upgrade your switch OS or migrate the module to a different brand in the future, we will re-code it to guarantee a 100% stable link.
Primary Application Scenarios
Optimized for 40km long-haul single-mode transmission, the high-performance 100G QSFP28 ER4 Transceiver fully matches Arista QSFP-100G-ER4L-S industrial-grade optical parameters and EOS protocol compatibility. Featuring low BER rate, strong anti-dispersion capability and stable LAN-WDM signal output, this compatible optical module is widely deployed in Arista cloud data center DCI interconnection, high-density 100G fabric backbone upgrading, cross-building enterprise long-distance trunk transmission and large-scale bandwidth expansion scenarios.
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Bulk replacement and upgrade of aging Arista QSFP-100G-ER4L-S modules for cloud data center long-distance DCI interconnection
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High-density leaf-spine fabric network iteration adopting 100G QSFP28 ER4 Transceiver to build 40km low-loss 100G backbone links
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Enterprise cross-building long-haul interconnection deploying stable 100G QSFP28 ER4 Transceiver for 100G high-speed trunk transmission
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Cloud operator data center bandwidth expansion using low-jitter 100G QSFP28 ER4 Transceiver for medium and long-distance optical transmission
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System integrator custom-coded 100G QSFP28 ER4 Transceiver for multi-vendor hybrid Arista network integration projects
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High-reliability data center infrastructure transformation adopting wide-temperature 100G QSFP28 ER4 Transceiver for long-haul trunk deployment
Connectivity Solutions(Applications)
1. 100G Switch-to-Switch Interconnection
Deploy paired HYTOPTODEVICE 100G QSFP28 ER4 Transceiver with standard G.652 single-mode fiber to build stable 40km 100G switch-to-switch trunk links for Arista 7000/7200/7500 series switches. This long-reach transceiver breaks the 10km distance limit of LR4 modules, supports low-BER cross-fabric and cross-room data center interconnection, and guarantees ultra-stable long-haul traffic scheduling for Arista cloud fabric architecture.
2.100G Long-haul Switch Link with Structured Cabling
Fully adapted to standard enterprise structured cabling systems, the high-performance 100G QSFP28 ER4 Transceiver supports 40km ultra-stable long-distance 100G transmission for Arista enterprise and cloud data center networks. It solves the distance bottleneck of traditional short-range optical modules, realizes scalable cross-building high-speed optical interconnection, and maintains excellent signal integrity and anti-interference performance in complex structured cabling environments.
Features | 100G Connectivity for Data Center
Low-Power High-Density 100G QSFP28 ER4 Transceiver for Fast Arista Data Center Bandwidth Upgrade
Featured with 4.5W low-power consumption, high port density and ultra-high-speed transmission performance, the 100G QSFP28 ER4 Transceiver provides a cost-effective and efficient deployment solution for modern Arista data center 100G network iteration. It allows enterprise and cloud data center operators to quickly scale up 100G long-reach transmission capacity on existing Arista switch hardware, effectively solving bandwidth bottlenecks and transmission distance limitations of traditional 25G/40G architecture. Hot-swappable plug-and-play design simplifies on-site installation, while low-power operation reduces overall data center PUE and long-term operational costs.
FAQ for 100G QSFP28 ER4 Module
Q1: What is the maximum optical link budget of Arista switch matching 100G QSFP28 ER4 Transceiver?
A: The standard power budget hits 18dB to 21dB, which reserves enough loss margin to handle high connector insertion loss on 40km metro single-mode fiber links. All modules from HYTOPTODEVICE pass strict optical margin testing to stabilize long-distance DCI interconnection.
Q2: Do I absolutely need an optical attenuator for short-distance lab testing with 40km reach 100G QSFP28 ER4 Transceiver?
A: Yes. This series equips high-sensitivity APD receivers. Direct short fiber connection without a 10dB–15dB fixed attenuator leads to optical overload and permanent receiver burnout. Our technical team provides matching attenuation suggestions for all Arista-compatible optical modules.
Q3: Does Arista leaf-spine fabric deployed 100G QSFP28 ER4 Transceiver require host RS-FEC for full rated transmission distance?
A: Yes. Standard long-reach transceivers rely on switch-side RS-FEC (Clause 91) to achieve full 40km stable transmission. Disabling FEC cuts the reliable working distance down to roughly 30km. HYTOPTODEVICE completes full EOS compatibility verification before shipment.
Q4: Can I turn off RS-FEC to reduce transmission latency on 100G QSFP28 ER4 Transceiver with ultra-clean low-loss fiber runs?
A: FEC shutdown is not recommended. Even flawless fiber will trigger high Pre-FEC BER and random packet drops once the span exceeds 25km–30km. We suggest retaining FEC for consistent low-error-rate trunk performance.
Q5: Can third-party coded 100G QSFP28 ER4 Transceiver realize interconnection with original OEM Arista and Cisco ER4 optics?
A: Smooth cross-brand communication is supported. As long as both sides comply with IEEE 802.3ba 100GBASE-ER4 optical layer standards, mutual data transmission works normally. HYTOPTODEVICE offers free custom EEPROM coding for mixed-vendor network projects.
Q6: Should network integrators choose 4-channel NRZ 100G QSFP28 ER4 Transceiver or single-lambda PAM4 ER1 optics for legacy Arista hardware?
A: Old-generation Arista switches only support 4×25G NRZ signal architecture, so the 4-lane ER4 transceiver is mandatory. ER1 single-channel PAM4 modules only fit latest cloud switching hardware. We supply both series for different generation equipment upgrades.
Q7: How much will contaminated LC patch cords degrade signal performance of long-haul 100G QSFP28 ER4 Transceiver compared to short-range SR4 modules?
A: Dirty connectors bring fatal signal attenuation for ER4 products. Its narrow 18–21dB power budget for 40km transmission means tiny dust loss can break the entire trunk, unlike SR4 modules with loose loss tolerance. Our finished products adopt premium LC receptacles to lower daily maintenance risks.
Q8: What are the factory calibrated transmit and receive power reference ranges for Arista DCI dedicated 100G QSFP28 ER4 Transceiver?
A: Typical Tx power ranges from -2.9dBm to +4.5dBm, while APD receiving sensitivity stays between -20.5dBm and -4.5dBm. Every batch undergoes full optical parameter inspection at HYTOPTODEVICE’s test workshop before delivery.
Q9: What laser solution is integrated inside drop-in replacement 100G QSFP28 ER4 Transceiver matching Arista QSFP-100G-ER4L-S?
A: All 40km long-reach variants adopt EML electro-absorption modulated lasers only. Low-cost DML chips generate severe chirp and dispersion, failing to maintain error-free transmission over full-span single-mode cables. We eliminate DML options for all long-distance optical transceivers.
Q10: Can standard single-rate 100G QSFP28 ER4 Transceiver support simultaneous 100GE and OTU4 transport signal transmission?
A: Standard models only run at 103.1Gbps for Ethernet service. Dual-rate versions that reach 111.8Gbps for OTU4 need customized firmware development. HYTOPTODEVICE accepts tailored dual-rate programming for large bulk orders.
Q11: Does the built-in high-power laser of single-mode 100G QSFP28 ER4 Transceiver pose eye hazards for on-site network engineers?
A: The product is classified Class 1 eye-safe under normal hot-plug operation. However, direct observation via fiber inspection microscopes or optical magnifiers will cause irreversible eye damage. Safety operation guides are attached with each shipment.
Q12: Does repeated frequent hot plugging damage the gold-plated contact pins of rack-mounted 100G QSFP28 ER4 Transceiver?
A: Excessive plug cycles wear surface plating gradually. Standard QSFP28 mechanical design only tolerates 100 to 200 insertions before contact performance declines. Our transceivers adopt thickened gold plating to extend service life inside high-density Arista cabinets.
Brand & Service Advantage
HYTOPTODEVICE is a professional global supplier of high-compatibility long-reach optical transceivers, focusing on R&D and bulk supply of Arista QSFP-100G-ER4L-S compatible 100G QSFP28 ER4 Transceiver. Every product undergoes strict optical parameter calibration, 72-hour high-low temperature cyclic aging testing, and real-machine interoperability verification on official Arista EOS hardware platforms. We provide free sample testing, exclusive custom Arista EEPROM coding, OEM private label customization, fast global logistics, and 5-year factory warranty service. Our compatible 100G QSFP28 ER4 Transceiver helps cloud data center operators and system integrators reduce procurement costs by 60%–70% compared with original Arista modules, while maintaining industrial-grade 40km long-distance transmission stability and full DDM diagnostic compatibility.
Why Network Engineers Choose HYTOPTODEVICE
HYTOPTODEVICE has supplied over 5000,000 optical transceiver modules to data centers, ISPs, and enterprise networks across 100+ countries since 2011. Every module undergoes a 72-hour burn-in test and full DDM/DOM validation before shipment.
- Up to 70% cost savings vs OEM, transparent pricing & flexible bulk rates, supported quality returns
- 100% real-device compatible with Cisco, Huawei,Dell,Juniper, and Arista
- ISO 9001:2015 Shenzhen factory, full lineup: 1.25G/10G/25G/40G/100G/200G/400G/800G/1.6T transceivers
- Ample stock, fast global DHL/FedEx shipping in 3–5 working days
- Free pre-sales engineering support for custom EEPROM & private label firmware
- Real switch test videos available for pre-purchase review; inspection & shipping videos provided per order
“Phenomenal performance. We deployed 200 HYTOPTODEVICE SFP modules to replace Cisco OEMs in our backbone network. Result? Zero compatibility issues and a 60% reduction in costs. Highly recommended for mission-critical networks."— Senior Network Engineer, Regional Telecom, Australia
Quality Certification & Compliance
At HYTOPTODEVICE, our quality commitment is backed by industry-standard validations. From fiber optical transceiver manufacturing to final visual inspection, from IQC、IPQC、FQC to OQC, our processes ensure global compliance and reliability.
We adhere to rigorous standards for our SFP modules and network solutions:
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ISO 9001: Certified quality management and production consistency.
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CE & FCC: Fully compliant for seamless Global Market Access.
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RoHS: Committed to environmental responsibility and hazardous material control.
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Proven Reliability: Rigorous testing to reduce compliance risk and ensure safety.
Certified Quality. Global Standards. Guaranteed Performance.
Rigorous Industrial Product Testing
100% 3rd Party Compatible
Partial Test Demonstration
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