HPE 845398-B21 SFP Transceiver Module
If you need a large quantity of 845398-B21 product - call us at +1 (718) 766 5269 or request a quote at live chat and our sales manager will contact you shortly.
Looking for assistance? Connect with one of our experts
FREE Shipping. We are accepting NET 30 Days Purchase Orders. Get a decision in seconds, without affecting your credit.

HPE 845398-B21 25GB SFP28 100m LC SR Multimode Fiber Bulk

Availability: In Stock
Part Number#: 845398-B21
List Price was: $607.69
Your Price:
You Save: $449.69 (74% off)

3% Discount on Checkout

Short Description:
845398-B21 25 Gigabyte (GB) Small Form-Factor Pluggable (SFP28) 100m Low Current (LC) SR Multimode Fiber Transceiver Module | Made by HPE | New Bulk Pack
Product Condition:
New Bulk Pack
Warranty provided by ALLHDD.COM:
30 Days

Singlemode and Multimode Fiber Optics

The 845398-B21 HPE 25GB SFP28 100m LC Multimode Fiber Transceiver Module is designed to support multimode fiber optics, which is one of two types of fiber optics used in data communication systems. The other type is single-mode fiber optics. Here's an explanation of the differences between the two types:

  • Multimode fiber optics: Multimode fiber optics are designed to carry multiple modes or paths of light simultaneously. This allows them to transmit data over short distances (up to a few hundred meters) at high speeds. Multimode fibers have a larger core diameter, typically ranging from 50 to 62.5 microns, which allows for easier coupling of light into the fiber.
  • Single-mode fiber optics: Single-mode fiber optics are designed to carry only one mode or path of light. This allows them to transmit data over longer distances (up to tens of kilometers) at high speeds with minimal signal distortion. Single-mode fibers have a much smaller core diameter, typically around 9 microns, which makes them more difficult to couple light into and requires more precise alignment of the optics.

The 845398-B21 HPE transceiver module is designed to support multimode fiber optics with an LC connector type. Multimode fiber optics are typically used in data communication systems within a building or campus, where distances are relatively short and high data transmission rates are required. Single-mode fiber optics, on the other hand, are typically used in long-distance data communication applications, such as telecommunications networks and submarine cables.

It's important to note that the choice between single-mode and multimode fiber optics depends on the specific requirements of the data communication system. Factors such as distance, bandwidth, and cost will determine which type of fiber optic is most suitable for a given application.

Fiber Optic Cable Types and Connectors

The 845398-B21 HPE 25GB SFP28 100m LC Multimode Fiber Transceiver Module is designed to be used with multimode fiber optic cables, which are typically available in two core diameters: 50 microns and 62.5 microns. The core diameter is an important factor in determining the distance over which the cable can transmit data at a given speed.

There are several types of fiber optic cable constructions available, including:

  • Simplex cable: This type of cable consists of a single fiber and is typically used for point-to-point communication.
  • Duplex cable: This type of cable consists of two fibers, allowing for bi-directional communication.
  • Ribbon cable: This type of cable consists of multiple fibers arranged in a ribbon-like configuration.

In addition to the cable type, the 845398-B21 HPE transceiver module is designed to be used with LC (Lucent Connector) connectors. The LC connector is a small, easy-to-use connector that provides reliable performance and low insertion loss. It uses a 1.25 mm ferrule, which is smaller than the 2.5 mm ferrule used in other connectors such as the SC (Subscriber Connector) or ST (Straight Tip) connectors.

LC connectors are used in a variety of applications, including high-speed data communication, telecommunication networks, and cable TV networks. They are also widely used in data centers and server rooms because of their small form factor, which allows for higher port density on networking equipment.

The 845398-B21 HPE transceiver module is designed to work with multimode fiber optic cables with LC connectors. The choice of fiber optic cable and connector type will depend on the specific requirements of the data communication system, including distance, bandwidth, and environmental conditions.

Installation and Configuration

Installing and configuring the 845398-B21 HPE 25GB SFP28 100m LC Multimode Fiber Transceiver Module involves several steps. Here's a general overview of the process:

  • Ensure compatibility: Before installing the transceiver module, make sure that it is compatible with your networking equipment, including switches, routers, and servers. Check the technical specifications of your equipment to ensure that it supports the SFP28 standard and is compatible with the module.
  • Install the transceiver module: To install the module, first turn off the networking equipment and unplug it from the power source. Insert the transceiver module into the appropriate slot on the equipment. Make sure that the module is securely seated and the latch is engaged.
  • Connect the fiber optic cable: Next, connect the fiber optic cable to the LC connector on the transceiver module. Make sure that the connector is properly aligned and inserted into the port.
  • Power on the equipment: Once the transceiver module and fiber optic cable are installed, plug in the networking equipment and turn it on. The equipment should detect the module and configure it automatically.
  • Configure the transceiver module: If necessary, you may need to configure the transceiver module manually using the command line interface (CLI) of the networking equipment. Consult the equipment's user manual for instructions on how to do this.
  • Verify connectivity: Finally, verify that the networking equipment is communicating properly over the fiber optic link. Use diagnostic tools such as ping or traceroute to verify connectivity and troubleshoot any issues.

The installation and configuration process for the 845398-B21 HPE transceiver module is relatively straightforward, but it's important to follow the manufacturer's instructions carefully and ensure compatibility with your equipment before proceeding.

Main Specifications about this 845398-B21

  • Manufacturer: HPE
  • Part Number or SKU# 845398-B21
  • Type: Networking
  • Transceiver Type: Transceiver Module

Media & Performance of Transceiver Module

  • Ethernet Technology: 25 Gigabit Ethernet
  • Form Factor: Plug-in module
  • Interfaces: 1 x Ethernet 25GBase-SR - LC multi-mode x 2
  • Media Type Supported Optical Fiber
  • Fiber Mode Supported Multi-mode

Networking of 25 Gigabit Ethernet Module

  • Connectivity Technology: Wired
  • Cabling Type: 25GBase-SR
  • Data Link Protocol: 25 Gigabit LAN
  • Data Transfer Rate: 25 Gbps
  • Max Transfer Distance: 328 FT

Product Condition:
New Bulk Pack
Warranty provided by ALLHDD.COM:
30 Days

About New Bulk Pack Products

New Bulk Pack products come with clamshell boxes and do not have any manufacturer warranty. Many times manufacturers disassemble whole units to use parts or pulled from a new system. Typically, this product doesn't come with software or instructions unless indicated and no Manufacturer’s genuine warranty. You can take note these are not brand new products.

Here, you can check more available conditions of your desired product 845398-B21 at a competitive price. We are trying our best to meet your needs on the enterprise-level computer, server, data centre, and networking hardware. You are welcome to ask our live chat or get live representative support over the phone.


Please choose your location for calculate shipping cost.


ALLHDD guarantees that the products will not have defects in material that will affect the product's functionality during the Standard Warranty Period. The warranty period starts when the merchandise/items from our warehouse.

What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

What is not covered by our warranty?

The reason why our warranty does not cover any problem caused by the following conditions:

(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;

(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

What is the Manufacturer/Brand Warranty?

In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
Final Sale items are non-returnable/refundable in any situation. Any question? please ask our team before the shipment.

Important notes:

We can provide additional warranty service/support for any product you purchase from us if you need additional warranty coverage before finalizing the order from ALLHDD.Com. You need to ask in live chat/help or call us for more information.

Individual product warranty mentioned on each item product description page/detail page.

Free Technical support on purchased items, our expert consultancy over the phone, by email, by live chat, or by remote login.


Shipping Options and Estimated Delivery Time

UPS Shipping Options:

FREE UPS® Ground (Free shipping to all orders for 48 states!)
Estimated delivery time: 4-7 business days

UPS 3 Day Select®
Estimated delivery time: 3 business days

UPS 2nd Day Air®
Estimated delivery time: 1-2 business days, Delivery by 10:30 AM or 2:00 PM

UPS Next Day Air® Standard Overnight
Estimated delivery time: Overnight 2-5 PM, Standard Overnight Delivery.

UPS Next Day Air® - Priority Overnight
Estimated delivery time: Overnight Delivery (Next Business Day) Delivery by 10:30 AM or 12:00 PM

UPS Next Day Air® First Overnight - Early A.M
Estimated delivery time: Overnight 8:00 AM, Early morning, overnight delivery for your time-critical shipments.

UPS® First Overnight - Saturday
Estimated delivery time: Overnight 8:30 AM – Saturday

FedEx Shipping Options:

FedEx Ground®
Estimated delivery time: (4–7 business days in the contiguous 48 states)
*For residential delivery via FedEx Ground use FedEx Home Delivery®
Estimated delivery time: 4−7 business days, based on the distance to the destination.

FedEx Express Saver®
Estimated delivery time: 3 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states (except Hawaii and Alaska)

FedEx 2Day®
Estimated delivery time: 2 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states

FedEx Standard Overnight®
Estimated delivery time: Next-business-day (by 4:30 PM to U.S. businesses and by 8:00 PM to residences)
Available throughout all 50 states (Hawaii is outbound only)

FedEx Priority Overnight®
Estimated delivery time: Next-business-day (by 10:30 PM to U.S. businesses, noon to most residences)
Available throughout all 50 states

FedEx First Overnight®
Estimated delivery time: Next-business-day (by 8:30 or 9 AM to most areas)
Available throughout all 50 states

Worldwide Shipping Options:

UPS®/FedEx® International Economy

Estimated delivery time: 4-7 business days

UPS®/FedEx® International Priority

Estimated delivery time: 2-4 business days

UPS®/FedEx® Ground Shipping Canada

Estimated delivery time: 5-8 business days

Important notes:

  • The processing of orders with Ground Shipping can take up to 24-48 hours. But we try to process all orders the same day.
  • We are not responsible for weather problems that may affect the delivery of goods by carriers. We cannot guarantee the exact delivery time, regardless of the carriers' claims.
  • If you have any specific delivery time requirements, please contact our customer support and someone from our customer service team will be able to help you.
  • You can estimate the shipping cost from the products detail page, also available on the checkout page
  • The shipping cost depends on box dimensions, weight, and zip/postal code
  • To get a FedEx® delivery service you need to mention it on the checkout page notebox.
  • For urgent shipments, please contact our customer service.
  • Shipping cut off 4:00 PM (Monday-Friday) and available blind drop shipment.