| Manufacturer | Lenovo |
| Model | FLEX EN4091 10Gb Ethernet Pass-thru |
| Manufacturer Part Number | 88Y6043 |
| Product Type | Ethernet Pass-thru Switch |
| Form Factor | Modular Switch Module for Flex System |
| Weight | 2.82 kg |
| Power Consumption | 20W (Typical) |
| Input Voltage | 12V DC via enclosure backplane |
Lenovo FLEX EN4091 10Gb Ethernet Pass-thru Switch, 88Y6043

Key Benefits
AI-Powered Summaries from Online Customer Reviews
Eye-Insights™ are generated by proprietary AI that analyzes real online customer reviews to highlight top pros and key product features. While we aim for accuracy, insights are provided “as-is” and individual results may vary.
- Delivers 10Gbps throughput, ideal for high-bandwidth Flex System applications
- TAA compliance ensures eligibility for government and institutional contracts
- Pass-thru architecture offers lower latency compared to managed switches
Product Overview
The Lenovo FLEX EN4091 10Gb Ethernet Pass-thru, model 88Y6043, delivers 10Gbps high-speed connectivity for modern enterprise networks using Flex System infrastructure. Designed with Gigabit Ethernet support and a pass-thru architecture, it minimizes latency while offering full TAA compliance for regulated environments. Compact dimensions of 15.8 x 12.5 x 1.2 inches allow seamless integration into data center enclosures. Built in Mexico, this Ethernet switch suits enterprise and government-grade deployments requiring efficient, high-throughput networking solutions.
Specifications
Product Overview
Wireless Features
Compliance & Origin
| Country of Origin | Mexico |
| TAA Compliant | Yes |
| RoHS Compliant | Yes |
| Certifications | UL, FCC Class A, CE, IEC/EN 60950-1 |
| Trade Agreement Act (TAA) | Yes |
Advanced Security Features
| Firewall Features | Not supported (Layer 1 pass-thru) |
| Access Control | Not applicable |
| Built-in Security | No packet inspection or filtration |
Interfaces
| Ports (Upstream) | 14x External SFP+ 10GbE Ports |
| Ports (Downstream) | 14x Internal SFP+ 10GbE Ports to compute nodes |
| Data Transfer Rate | 10 Gbps |
| Data Link Protocol | 10 Gigabit Ethernet |
| Port Type | SFP+ (Small Form-factor Pluggable Plus) |
| Supported Media | Fiber; Twinax Direct Attach Copper (DAC); |
| Compatible Transceivers | SFP+ SR, LR, DAC cables |
| Forwarding Mode | Pass-thru (not managed or switched) |
Physical & Environmental
| Dimensions (W x D x H) | 15.8 x 12.5 x 1.2 in |
| Operating Temperature | 10°C to 35°C (50°F to 95°F) |
| Non-Operating Temperature | -40°C to 60°C (-40°F to 140°F) |
| Operating Humidity | 8% to 80% (non-condensing) |
| Non-Operating Humidity | 8% to 95% (non-condensing) |
| Cooling | Via Flex System chassis airflow |
| Mounting Type | Blade chassis integrated module |
Cloud Management & Licensing
| Management Interface | None (Pass-thru architecture) |
| Cloud Managed | No |
| Licensing Required | No licensing required |