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Return any product within 14 days of delivery if it doesn’t meet your technical or operational needs.

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All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.

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J4859C-C |
Description: | Gigabit-LX-LC Mini-GBIC C Ver. HP X121 Compatible |
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Shipping as per your need
Same-day Shipping

Express Delivery Across the USA
Need it fast? Choose Express Shipping and receive your order within 1–3 business days.

Free Ground Shipping Available
Standard ground delivery across the U.S. takes 2–6 days, depending on your location — no extra charge.

International Shipments Made Simple
For all international orders, we ship via your UPS, FedEx, or DHL account — or to your U.S.-based freight forwarder.
Delivery Timelines

Under 100 KG? Ships Express.
Smaller shipments go via DHL or FedEx Express — delivered worldwide in approximately 3 business days.

Over 100 KG? Ships via Freight.
Larger orders are dispatched through freight forwarding partners. Delivery takes 7–10 business days, globally.

Always Delivered to Your Door
Every shipment is delivered directly to your address — regardless of country or carrier.
14-Day Money Back Guarantee
Free 14-Day Returns

Tested it, but it’s not a fit?
Return any product within 14 days of delivery if it doesn’t meet your technical or operational needs.

Initiate returns with ease.
Our RMA process is streamlined — just raise a request, follow the packaging guidelines, and we’ll handle the rest.

Refund or restock, your call.
Changed your mind? Get a refund (restocking fees may apply) or swap with another product.
30-Day Hardware Replacement

Covered for any early faults.
All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.

Replacements shipped in 10 days or less.
Once your return is inspected and approved, we dispatch the replacement promptly to keep your operations moving.

RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
TRUSTED, TRIED, PROVEN







J4859C-C Overview
J4859C-C is a QSFP+ transceiver designed for high-speed data communications primarily in data center environments. It supports a 40G data rate, utilizes LC connectors, and is optimized for short-range transmission over multi-mode fiber using Ethernet protocols, ensuring efficient performance in compact network infrastructures.
Engineered with a precise QSFP+ form factor and physical dimensions of 0.62 inches in height, 1.17 inches in width, and 0.47 inches in depth, the J4859C-C is ideally suited for modern enterprise networks and telecom applications. Its design emphasizes low power consumption, robust operating and storage temperature ranges, and broad compatibility with major networking vendors.
What is the price of J4859C-C?
Lowest price of J4859C-C is $ 0.00. Shop now discounts with bulk quotation for J4859C-C
Explore more options from Transceivers or Orm products.
J4859C-C Specifications
Product Type | Transceiver |
Form Factor | QSFP+ |
Data Rate | 40G |
Connector Type | LC |
Wavelength | 850nm |
Transmission Distance | Short-Range |
Fiber Type | Multi-mode |
Max Distance | 100 meters |
Supported Protocols | Ethernet |
Network Interface | Fiber |
Power Consumption | 3.5W |
Operating Temperature | 0 to 70°C |
Storage Temperature | -40 to 85°C |
Input Voltage | 3.3V |
Compatibility | Cisco, Juniper, Huawei, Arista |
Product Name | J4859C-C QSFP+ Transceiver |
Height | 0.62 inches |
Width | 1.17 inches |
Depth | 0.47 inches |
Weight | 0.20 lbs |
Quality Certifications
To get the detailed certification, please go to the Compliance Center.







Product Comparison Table
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Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
Form Factor | SFP | SFP | SFP | QSFP+ | SFP+ |
Data Rate | 1G | OC-48 | OC-48 | 40G | 10G |
Connector Type | LC | LC | LC | LC | LC |
Wavelength | 1550 nm | 1310nm | 1310 nm | 850nm | 1470 nm |
Transmission Distance | Long-Range | Short-Range | Long-Range | Short-Range | Extended-Range |
Fiber Type | Single-mode | Single-mode | Single-mode | Multi-mode | Single-mode |
Max Distance | 80 km | 10 km | 10 km | 100 meters | 40 km |
Supported Protocols | Ethernet, Fibre Channel | SONET, OC-48 | SONET, SDH, OC-48 | Ethernet | Ethernet |
Network Interface | Fiber | Optical Fiber | Fiber | Fiber | Fiber |
Power Consumption | 3.5W | 3.5 W | 2.0 W | 3.5W | N/A |
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 | 3.3 V | 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 | DWDM-SFP-5979= | SFP-OC48-SR | SFP-OC48-LR1-C | J4859C-C QSFP+ Transceiver | EX-SFP-10GE-ER-1470-C |
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