Expertise Applied | Answers Delivered 4G/5G Radio and Access Equipment Datacenter & Cloud Users must independently evaluate the suitability of and test each product selected for their own specific applications. It is the User's sole responsibility to defermine f particular system or use based on their own performance criteria, conditions, specific application, compatibility with other parts, and environmental conditions. Users must independently provide appropriate design and operating safeguards to minimize any risks associated with their applications and products. Littelfuse products are not designe for, and may not be used in, all applications. Read complete Disclaimer Notice at littelfuse.com/disclaimer-electronics.
Market trends and drivers New installations of 4G cellular base stations increase network coverage. Next generation 5G installations are enhancing existing consumer experiences and creating new use cases for special services such as autonomous driving. Small cell and micro-base stations provide high-speed 5G service. Open RAN initiatives are increasing buyer power and the increasing competitiveness of new equipment suppliers. 5G builds on 4G and creates opportunities for new applications Source: 3 g Generation Partnership Project (3GPP)
Five sources of electrical hazards affect the lifetime and reliability of communications infrastructure equipment: 1. Lightning-induced surges 2. Transient voltage surge from load switching 3. Electrostatic discharge (ESD) 4. Overload current
■ Voltage protection will absorb transient energy during abnormal high-voltage conditions. . Reaction time and energy handling capability varies based on technology. ▪ Using multiple technologies together can help maximize features and benefits.

Advantages of antenna evolution:
: Reduced footprint . More efficient delivery of power . Higher capacity for 5G . Faster data transmission to network RET = remote electrical tilt COAX = coaxial cable AAS = Advanced antenna system RRH = remote radio head BBU = baseband unit Protecting DC power lines is critical for high reliability antenna. Littelfuse, Inc. © 2021
Advanced antenna ● Fuse ● TVS Diode 0 MOV ● PPTC ● GDT ●  Polymer ESD Tower mount amplifier (@) ● Fuse ● TVS Diode
Baseband unit
● Fuse ● MOV ● SIDACtor ● GDT ● Diode Array Protect Control Sense Littelfuse, Inc. © 2021 (@) ● SIDACtor ● Diode Array Power supply ● Fuse ● MOV ●  Magnetic Sensor ● MOSFET ● TVS Diode ● Schottky Diode ● GDT Battery backupつ● TVS Diode o PPTC ● Fuse ●  Battery Protector ● Diode Array ● Temperature Sensor ●   Battery Mini-breaker Surge protection device (D ● MOV ● TVS Diode ● Fuse (@)
W Advanced Antenna System (AAS) block diagram 4 Baseband unit (BBU) block diagram 5 Power supply and battery backup block diagram Littelfuse, Inc. © 2021 Expertise Applied | Actives Delivering
4 Baseband unit (BBU) block diagram 5 Power supply_and_battery_backup_block_diagram Expertise Applied | Actives Delivere Littelfuse, Inc. © 2021
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Antenna Array ●  Polymer ESD (@) Power Supply ● Fuse ● MOV ●  Magnetic Sensor ● MOSFET ● TVS Diode ● Schottky Diode ● GDT Baseband Processor and RF Amplifier ● TVS Diode (@) Battery Backup ● SIDACtor ● PPTC ●   Battery Protector ● Temperature Sensor ●   Battery Mini-breaker (@) ● TVS Diode ● Fuse ● Diode Array Expertise Applied | Actives Delivering Littelfuse, Inc. © 2021 Protect Control Sense
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Explore the world of Littelfuse with the Electronics eCatalogs ( http://electronicscatalogs.littelfuse.com Click the images to open the catalogs Expertise Applied | Answers Delivered Litteliuse, Inc. © 2021
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High-volume manufacturing that is committed to the highest quality standards This document is provided by Littelfuse, Inc. ("Littelfuse") for informational and quideline purposes only. Littelfuse assumes no liability for errors or omissions in this d for any of the information contained herein. Information is provided on an "as is" and "with all faults" basis for evaluation purposes only. Applications described are for i purposes only, and Littelfuse makes no representation that such applications will be suitable for the customer's specific use without further testing or modification. Littel expressly disclaims all warranties, whether express, implied or statution, including but not limited to the implied warranties of merchantability and fitness for a particula and non-infringement.  It is the customer's sole responsibility to determine suitability for a particular system or use based on their own performance criteria, conditions, application, compatibility with other parts, and environmental conditions. Customers must independently provide appropriate design and operating safeguards to minimize any risks associated with their applications and products. Read complete Disclaimer Notice at littelfuse.com/disclaimer-electronics . Expertise Applied | Answers Delivered elfuse.com