United States$5,000,000+
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Nathan Green
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QSFP+ BiDi transceiver worked well over multimode fiber.
JL251A
HPE X140 40G QSFP+ LC BiDi 100m MM Transceiver
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JL251A
- Description:
- HPE X140 40G QSFP+ LC BiDi 100m MM Transceiver
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JL251A Overview
JL251A is a 10G SFP+ transceiver featuring LC connectors and engineered for short-range transmission over multi-mode fiber. It supports Ethernet protocols and is designed with a compact form factor that meets industry-standard physical dimensions, making it ideal for seamless integration into network systems.
JL251A is widely used in data centers, enterprise networks, and telecom environments where reliable 10G connectivity is paramount. Its proven performance, optimized design, and comprehensive compatibility with major vendor platforms ensure that it delivers consistent, high-speed data transmission in demanding network applications.
JL251A price is $837.00, a 28% saving from the Hpe list price of $1,163.00. JL251A is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for JL251A for additional pricing. Browse the full category range or explore all Hpe products.
JL251A Specifications
- Product Type
- Transceiver
- Form Factor
- SFP+
- Data Rate
- 10G
- Connector Type
- LC
- Wavelength
- 850nm
- Transmission Distance
- Short-Range
- Fiber Type
- Multi-mode
- Max Distance
- 300 meters
- Supported Protocols
- Ethernet
- Network Interface
- Ethernet
- Power Consumption
- 4.0W
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Compatibility
- Cisco / Juniper / Huawei / Arista
- Product Name
- JL251A 10G SFP+ Transceiver
- Height
- 0.33 inches
- Width
- 0.87 inches
- Depth
- 3.55 inches
- Weight
- 0.23 lbs
JL251A Use Case
High-Density Data Center Inter-Rack Connectivity
Scenario: An enterprise data center upgrades from 10 GbE to 40 GbE and must interconnect 48 top-of-rack switches across multiple aisles without installing new fiber. The JL251A-HPE X140 40G QSFP+ LC BiDi 100 m MM Transceiver delivers bidirectional 40 GbE over existing OM3/OM4 duplex fiber. Benefit: Halves fiber count, cuts cabling CAPEX, and enables full-line-rate 40 Gbps within 100 m, simplifying trunk management and boosting aggregation performance.
Campus Network Backbone Upgrade
Scenario: A university campus needs a high-bandwidth backbone to support research clusters, video-enabled classrooms, and cloud services across buildings up to 100 m apart. Deploying JL251A-HPE X140 40G QSFP+ LC BiDi modules on core routers reuses existing multimode fiber to establish 40 GbE links via a single LC duplex cable. Benefit: Delivers 40 Gbps throughput over legacy fiber, eliminates re-cabling costs, and scales network capacity for growing academic and research demands.
Financial Trading Floor Low-Latency Link
Scenario: A trading firm requires microsecond-level latency and high throughput between matching engines and market data servers within the trading floor’s 100 m span. The JL251A-HPE X140 40G QSFP+ LC BiDi 100 m MM Transceiver provides bidirectional 40 GbE on a single duplex cable, reducing link complexity and jitter. Benefit: Achieves deterministic sub-microsecond latency, ensures synchronized market data replication, and secures competitive edge with ultra-reliable, high-performance connectivity.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| JL251A |  JD121A |  AP823A |  JW092A |  JG915A | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | SFP+ | SFP+ | SFP+ | SFP+ | QSFP |
| Data Rate | 10G | 10G | 10G | 10G | 100G |
| Connector Type | LC | LC | LC | LC | MPO |
| Wavelength | 850nm | 850nm | 850nm | 850 nm | 1310 nm |
| Transmission Distance | Short-Range | Short-Range | Short-Range | Short-Range | Long-Range |
| Fiber Type | Multi-mode | Multi-mode | Multi-mode | Multi-mode | Single-mode |
| Max Distance | 300 meters | 300 meters | 300 meters | 300 meters | 80 km |
| Supported Protocols | Ethernet | Ethernet, Fibre Channel | Ethernet, Fibre Channel | Ethernet | Ethernet, Fibre Channel |
| Network Interface | Ethernet | Ethernet | Fiber | Fiber | Fiber |
| Power Consumption | 4.0W | 3.5W | 3.5W | 3.5W | 6.5 W |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Compatibility | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista |
| Product Name | JL251A 10G SFP+ Transceiver | JD121A SFP+ Transceiver | AP823A 10G SFP+ Transceiver Module | JW092A SFP+ 10G Multi-Mode Optical Transceiver | JG915A QSFP 100G Transceiver |
| Height | 0.33 inches | 0.5 inches | 0.6 inches | 0.70 inches | 1.4 inches |
| Width | 0.87 inches | 0.8 inches | 0.7 inches | 0.65 inches | 0.6 inches |
| Depth | 3.55 inches | 1.2 inches | 1.0 inches | 1.10 inches | 0.3 inches |
| Weight | 0.23 lbs | 0.1 lbs | 0.1 lbs | 0.20 lbs | 0.15 lbs |
Reviews & Ratings
W
Waqas Ali
5
Simple installation and stable 40G links.
G
George Milton
5
Good performance for short range deployments.
K
Kjell Andersen
4
Reliable BiDi optics.
A
Adam Norris
5
Met expectations.
Questions & Answers
What is the HPE X140 40G QSFP+ LC BiDi 100m MM Transceiver (SKU JL251A)?
The HPE X140 40G QSFP+ LC BiDi 100m MM Transceiver (JL251A) is a high-performance 40GbE optical module designed for multimode fiber links up to 100 meters.
What type of transceiver is the JL251A?
The JL251A is a quad small form-factor pluggable plus (QSFP+) bidirectional (BiDi) transceiver for 40GbE applications.
Which fiber type and distance does the JL251A support?
It supports OM3/OM4 multimode fiber with a maximum link length of 100 meters.
What wavelength pairs are used by the JL251A?
The transceiver employs bidirectional WDM with paired wavelengths (850nm and 900nm) over a single duplex fiber.
What interface type does the JL251A use?
It uses a QSFP+ form factor with LC duplex connectors for plug-and-play installation.
What data rate does the JL251A support?
The module supports a data rate of 40 Gigabits per second (40GbE).
Is the JL251A hot-swappable?
Yes, the JL251A is hot-pluggable, allowing live insertion and removal without powering down the system.
Which HPE equipment is compatible with the JL251A?
This transceiver is fully supported on HPE Aruba and HPE FlexNetwork switches and routers that provide QSFP+ ports.
Can the JL251A be used with third-party hardware?
HPE qualifies the JL251A for use in HPE products; interoperability with third-party equipment is not guaranteed and may vary.
Does the JL251A support Digital Diagnostic Monitoring (DDM)?
Yes, it provides DDM for real-time monitoring of optical power, temperature, and transceiver supply voltage.
What is the operating temperature range for the JL251A?
The operating temperature range is 0°C to 70°C (32°F to 158°F).
How do I install the JL251A transceiver?
Align the QSFP+ module with the switch port, insert until the latch clicks, and verify the link LED is illuminated.
What is BiDi technology in this transceiver?
BiDi technology uses wavelength-division multiplexing to send and receive data over a single duplex fiber strand, halving cabling requirements.
Can the JL251A support a 4x10G breakout cable?
No, its BiDi design is optimized for 40GbE over a single duplex link and does not support 4x10GbE breakout functionality.
What warranty covers the JL251A?
HPE provides a limited lifetime warranty covering defects in materials and workmanship for the JL251A.
How do I troubleshoot connectivity issues with the JL251A?
Verify correct fiber type, clean and inspect LC connectors, check port configuration and DDM readings, and replace the module if the issue persists.