Copper SFP Transceiver LevelOne SFP-3841

Name: Copper SFP Transceiver LevelOne SFP-3841 SFP-3841
Brand: LEVELONE
SKU: 491076
Price: 48.49 EUR
Availability: InStock

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Short description

The LevelOne 1.25Gbps Copper SFP Transceiver offers a maximum data transfer rate of 1250 Mbit/s over a distance of 100m using RJ45 interface. It operates at an input voltage of 3.3 V and is CE and FCC certified. Compact dimensions of 57 mm x 12 mm x 13.7 mm make it suitable for various networking applications.

Available at price 48.49 €: 43 pcs.

Total available for order: 86 pcs.

Warranty: 2 Years

SKU: 491076

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Pick-up points

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Cost

1.99 €

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Customer service center

2b. Kengaraga str., Riga, Latvia, LV-1063

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From 4.99 € (Weight: 0.02 kg)

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Payment Methods:

Bank transfer, Bank cards on-line, Apple Pay, Google Pay

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Product information

Description

LevelOne SFP-3841 is a copper SFP transceiver that converts a 1000BASE-X optical Ethernet port to a 1000BASE-T copper Ethernet port. It supports bi-directional data transfer at rates up to 1.25 Gbps over unshielded twisted-pair Category 5 cable for distances up to 100 meters. The module features a compact RJ-45 connector assembly, a fully metallic enclosure for reduced EMI, and low power consumption, making it suitable for adding copper connectivity to SFP-capable switches and routers.

Advantages

The transceiver is hot-pluggable in a standard SFP footprint, operates over an extended case temperature range (0 °C to +70 °C), and provides access to the physical-layer IC via a 2-wire serial bus. Typical power dissipation is low (approximately 1.05 W), and the compact dimensions (57 mm x 12 mm x 13.7 mm) allow installation in dense networking equipment. The unit meets CE and FCC certification requirements.

Suitable for

Converting SFP optical ports to copper RJ-45 ports in switches and routers
Connecting Gigabit Ethernet devices over Cat5 UTP cable up to 100 m
Field upgrades where hot-pluggable media conversion is required

Key specifications

Interface type: SFP
Data rate: up to 1250 Mbit/s (1.25 Gbps)
Maximum copper reach: 100 m over Cat5 UTP
Power supply: 3.3 V input
Typical power dissipation: 1.05 W
Operating case temperature: 0 °C to +70 °C
Dimensions: 57 mm x 12 mm x 13.7 mm
Certifications: CE, FCC

How to use

Install the LevelOne SFP-3841 into an available SFP slot on the host device while the host is powered according to the host manufacturer’s instructions; the module supports hot-plug operation. Connect the RJ-45 connector to the Cat5 UTP cable leading to the copper Ethernet device. Ensure the host system supports 1000BASE-T operation over an SFP SERDES interface and verify link negotiation at 1 Gbps. Monitor the host’s interface status and use the 2-wire serial bus for accessing physical-layer information if required.

Usage recommendations

Use Category 5 or better unshielded twisted-pair cabling for runs up to 100 meters, verify that the host device firmware supports SFP copper modules, and avoid operating environments outside the specified 0 °C to +70 °C case temperature range for reliable performance.

Specifications

Interface type:: SFP
Maximum data transfer rate: The maximum speed with which data can be transmitted from one device to another.: 1250 Mbit/s
SFP transceiver type:: Copper

All features

Logistics data

Country of origin: Country where the device is made. Aka Country of manufacture (COM).: China
Harmonized System (HS) code:: 85369010

Packaging data

Package weight: Weight of the packaged product.: 35 g
Package height: The distance from the top to the bottom of the packaging.: 65 mm
Package depth: The distance from the front to the back of the packaging.: 20 mm
Package width: The distance from one side of the packaging to the other.: 106 mm

Weight & dimensions

Weight: Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.: 0.02 kg
Height: The measurement of the product from head to foot or from base to top.: 13.7 mm
Depth: The distance from the front to the back of something.: 12 mm
Width: The measurement or extent of something from side to side.: 57 mm

Operational conditions

Operating relative humidity (H-H):: 5 - 95
Storage temperature (T-T): The minimum and maximum temperatures at which the product can be safely stored.: -40 - 85
Operating temperature (T-T): The minimum and maximum temperatures at which the product can be safely operated.: 0 - 70

Sustainability

Sustainability certificates:: RoHS

Certificates

Certification:: CE, FCC

Power

Maximum current: The greatest possible amount of current, which is a quantity representing the rate of flow of electric charge.: 0.375 A
Maximum voltage:: 4 V
Input voltage: The voltage (V) which is required to power the product.: 3.3

Features

Hot-swap:: Yes
Hot-Plug support: Device has hot-plug capability, which means that user can replace system components without shutting down the system.: Yes

Performance

Ethernet LAN (RJ-45) ports: Number of Ethernet LAN (RJ-45) ports (connecting interfaces) in the device. Ethernet LAN (RJ-45) ports allow a computer to connect to the ethernet.: 1
Networking standards: The way in which the network is working, e.g. IEEE 802.11a, IEEE 802.11b, IEEE 802.11g.: IEEE 802.3ab, IEEE 802.3
Maximum transfer distance: The greatest distance over which the data/signal can be transferred.: 100 m
Interface type:: SFP
Maximum data transfer rate: The maximum speed with which data can be transmitted from one device to another.: 1250 Mbit/s
SFP transceiver type:: Copper

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Warehouse	Stock	Delivery to the store	Store Price
EU3	43	08.10.2026 Best delivery	48.49 € Best price

Available only for legal entities
Warehouse	Stock	Delivery to the store	Store Price
WH109	43	22.10.2026	59.49 €

48.49 €

Stock: 43

Delivery Date: 08.10.2026 Best delivery

Warehouse: EU3

Available only for legal entities

59.49 €

Stock: 43

Delivery Date: 22.10.2026

Warehouse: WH109

Customer reviews

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Customer questions

FAQ

How much does the Copper SFP Transceiver LevelOne SFP-3841 cost, and is it available for purchase?

The price is 48.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 86 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 08.10.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All LEVELONE products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized LEVELONE service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: interface type, maximum data transfer rate, sfp transceiver type, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

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Copper SFP Transceiver LevelOne SFP-3841

Short description

Product information

Description

Advantages

Suitable for

Key specifications

How to use

Usage recommendations

Specifications

Logistics data

Packaging data

Weight & dimensions

Operational conditions

Sustainability

Certificates

Power

Features

Performance

Description

Similar products

Product comparison

Customer reviews

Customer questions

How much does the Copper SFP Transceiver LevelOne SFP-3841 cost, and is it available for purchase?

If I order this product today, when will I receive my order?

What payment options are available?

Can this product be purchased for a company (with VAT)?

What is the warranty period?

Can the product be returned after purchase?

Where should I contact for warranty service?

How can I tell if this product suits my needs?