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J4858C
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Aruba X121 1G SFP LC SX Transceiver
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J4858C
- Description:
- Aruba X121 1G SFP LC SX Transceiver
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- Hpe
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- Warranty:
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- List Price:
$328.78
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J4858C Overview
J4858C is a 10G SFP+ optical transceiver featuring LC connectors and designed for short-range communications over multimode fiber. It supports Ethernet protocols and delivers data rates of 10G in a compact SFP+ form factor, making it ideally suited for data center interconnects, enterprise network upgrades, and telecom applications.
Engineered with precise physical dimensions for high-density deployments, the J4858C is optimized for seamless compatibility with leading network vendors such as Cisco, Juniper, Huawei, and Arista. Its robust build, efficient power consumption, and stable performance across an operating temperature of 0 to 70°C ensure reliable operation in demanding network environments.
J4858C price is $9.87, a 97% saving from the Hpe list price of $328.78. J4858C is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for J4858C for additional pricing. Browse the full Aruba Switches Transceivers series or explore all Hpe products.
J4858C Specifications
- Product Type
- Transceiver
- Form Factor
- SFP+
- Data Rate
- 10G
- Connector Type
- LC
- Wavelength
- 850 nm
- Transmission Distance
- Short-Range
- Fiber Type
- Multi-mode
- Supported Protocols
- Ethernet
- Network Interface
- Fiber
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Compatibility
- Cisco / Juniper / Huawei / Arista
- Weight
- 0.05 lbs
- Max Distance
- 300 meters
- Height
- 0.12 inches
- Width
- 0.65 inches
- Depth
- 0.65 inches
- Power Consumption
- 3.8W
- Product Name
- J4858C 10G SFP+ Optical Transceiver
J4858C Use Case
Data Center Spine-Leaf 1Gbps Multimode Fiber Uplink
In high-density data centers, the J4858C-Aruba X121 1G SFP LC SX Transceiver provides reliable 1Gbps multimode fiber links up to 550 m between spine and leaf switches. Outcome: Delivers low-latency, high-availability connectivity, streamlines cable management, and reduces operational costs with Aruba-certified compatibility.
Campus Building-to-Building Fiber Interconnect
Enterprises use the J4858C-Aruba X121 1G SFP LC SX Transceiver to establish secure 1Gbps connections over OM3 multimode fiber spans up to 400 m between campus distribution switches. Outcome: Enables seamless VLAN extension, scalable network services, and cost-effective infrastructure deployment.
Industrial Automation Network Backbone
Manufacturing facilities deploy the J4858C-Aruba X121 1G SFP LC SX Transceiver to connect industrial Ethernet switches to control systems across 200 m fiber runs in high-EMI environments. Outcome: Ensures deterministic, EMI-resistant data delivery for real-time control, enhances system reliability, and minimizes maintenance overhead.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| J4858C |  J9153D |  J9283D |  J8177D (5 Units) |  JL563A | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | SFP+ | SFP+ | SFP+ | QSFP+ | SFP |
| Data Rate | 10G | 10G | 10G | 40G | 10G |
| Connector Type | LC | LC | LC | LC | LC |
| Wavelength | 850 nm | 1310 nm | 1310 nm | 850 nm | 850 nm |
| Transmission Distance | Short-Range | Short-Range | Long-Range | Short-Range | Short-Range |
| Fiber Type | Multi-mode | Single-mode | Single-mode | Multi-mode | Multi-mode |
| Max Distance | 300 meters | 10 km | 80 km | 300 meters | 300 meters |
| Supported Protocols | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Network Interface | Fiber | Fiber | Fiber | Fiber | Fiber |
| Power Consumption | 3.8W | 3.5 W | 3.5 W | 5W | 1.5 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 | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista |
| Product Name | J4858C 10G SFP+ Optical Transceiver | J9153D 10G SFP+ Transceiver Module | J9283D LR SFP+ Transceiver | J8177D (5 Units) | JL563A 10G SFP Transceiver |
| Height | 0.12 inches | 0.25 inches | 0.28 inches | 0.57 inches | 0.8 inches |
| Width | 0.65 inches | 0.6 inches | 0.8 inches | 0.87 inches | 1.2 inches |
| Depth | 0.65 inches | 0.5 inches | 0.65 inches | 2.75 inches | 1.5 inches |
| Weight | 0.05 lbs | 0.05 lbs | 0.1 lbs | 0.25 lbs | 0.05 lbs |
Reviews & Ratings
Z
Zeeshan Crowley
5
Plug-and-play experience.
T
Tomasz Lewin
4
Stable fiber connectivity.
H
Hamza Ridley
5
Consistent performance.
D
David Palmer
4
Good value transceiver.
Questions & Answers
What is the Aruba X121 1G SFP LC SX Transceiver (SKU J4858C)?
The Aruba X121 1G SFP LC SX Transceiver (J4858C) is a short-range, hot-pluggable 1 GbE small form-factor pluggable (SFP) module designed for multimode fiber networks.
Which fiber optic cable type does this transceiver use?
It uses 50/125 µm or 62.5/125 µm multimode fiber with LC duplex connectors for SX transmission.
What is the maximum transmission distance for the J4858C?
The transceiver supports link lengths up to 550 meters over OM2 multimode fiber and up to 275 meters over OM1.
What data rate does the Aruba X121 1G SFP LC SX Transceiver support?
This module supports a single-channel data rate of 1 Gbps (1000 BASE-SX).
Is the J4858C compatible with Aruba and HPE switches?
Yes; it is fully qualified and tested to interoperate with Aruba, HPE, and HPE ProCurve switches and routers.
How do I install the Aruba X121 1G SFP LC SX Transceiver?
Simply insert the module into an empty SFP slot until it clicks, then connect your LC duplex fiber cable.
Does the J4858C require any software configuration?
No additional software is required; the transceiver is auto-recognized by Aruba and HPE devices upon insertion.
What is the operating wavelength of this SX transceiver?
It operates at a nominal wavelength of 850 nm for short-reach multimode fiber links.
What is the optical power budget of the Aruba X121 1G SFP LC SX Transceiver?
It delivers a minimum transmit power of −9.5 dBm and a receiver sensitivity of −17 dBm, providing an 7.5 dB power budget.
What is the operating temperature range for the J4858C?
The module operates reliably between 0 °C and +70 °C (commercial temperature range).
Does the Aruba X121 transceiver support hot-swapping?
Yes; you can insert or remove the SFP module without powering down the switch or host device.
What is the warranty period for SKU J4858C?
HPE provides a lifetime warranty on the Aruba X121 1G SFP LC SX Transceiver when used with supported devices.
Can I return the transceiver if it is defective?
Yes; defective units can be returned under HPE’s standard return material authorization (RMA) process.
Is the J4858C compatible with third-party network switches?
While not officially supported, many customers report interoperability with select third-party switches that accept generic SFP modules.
What is the typical power consumption of the Aruba X121 transceiver?
The module consumes approximately 0.8 W in normal operation.
Does the Aruba X121 support Digital Optical Monitoring (DOM)?
Yes; it supports SFF-8472 DOM for real-time monitoring of optical power, temperature, and voltage.