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28A2029-0A0

铰接(扣紧) 自由悬挂 铁氧体磁芯 250 欧姆 @ 100MHz 内径 0.394" 宽 x 0.170" 高(10.00mm x 4.30mm) 外径 0.877" 宽 x 0.860" 高(22.28mm x 21.84mm) 长度 1.290"(32.77mm)

产品类别:电线/电缆    电线与电缆   

制造商:Laird-Signal Integrity Products

官网地址:https://www.lairdtech.com/

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28A2029-0A0概述
这些易于安装的铁氧体磁芯设计用于降低所引起或发射的电磁干扰。 它们提供各种尺寸且适用于从 30MHz 到 1GHz 的应用。 这些铁氧体磁芯为电缆组件提供出色的共模和差模 EMO 抑制。

矩形铁氧体适合于数据电缆,例如电话或信号线
圆形铁氧体适合于电源电缆,例如影印机、打印机和其他办公室设备
28A2029-0A0规格参数
参数名称
属性值
类别
电线/电缆;电线与电缆
厂商名称
Laird-Signal Integrity Products
系列
28
包装
托盘
类型
圆形
设计
铰接(扣紧)
不同频率时阻抗
250 欧姆 @ 100MHz
材料
28
内部尺寸
0.394" 宽 x 0.170" 高(10.00mm x 4.30mm)
外部尺寸
0.877" 宽 x 0.860" 高(22.28mm x 21.84mm)
安装类型
自由悬挂
长度
1.290"(32.77mm)
28A2029-0A0文档预览
Ferrite EMI Cable Cores
About Laird
Laird is a global technology business focused on enabling wireless communication
and smart systems, and providing components and systems that protect
electronics. Laird operates through two divisions, Wireless Systems and
Performance Materials. Wireless Systems solutions include antenna systems,
embedded wireless modules, telematics products and wireless automation and
control solutions. Performance Materials solutions include electromagnetic
interference shielding, thermal management and signal integrity products. As a
leader in the design, supply and support of innovative technology, our products
allow people, organisations, machines and applications to connect effectively,
helping to build a world where smart technology transforms the way of life.
Custom products are supplied to major sectors of the electronics industry including
the handset, telecommunications, IT, automotive, public safety, consumer,
medical, rail, mining and industrial markets. Providing value and differentiation to
our customers through innovation, reliable fulfilment and speed, Laird PLC is listed
and headquartered in London, and employs over 9,000 people in more than 58
facilities located in 18 countries.
TABLE OF CONTENTS
Ferrite Material Impedance Comparison ................................................ 3
Design & Selection “Rules of Thumb” ..................................................... 3
High Frequency (HFB-) Cylindrical Cores ................................................ 4
High Frequency (HFA-) Split, Snap-On Cores .......................................... 5
Broadband (28B-) Cylindrical Cores ....................................................... 6
Broadband (28A-) Split, Snap-On Cores ................................................. 9
Low Frequency (LFB-) Cylindrical Cores ................................................ 15
Broadband (28R) Ribbon & Flex Cable Cores ....................................... 16
Broadband (28S) Split Ribbon & Flex Cable Cores ............................... 20
Ferrite EMI Disks & Plates .................................................................... 26
Ferrite Plates for Wireless Charging ...................................................... 27
Flexible Ferrite Sheets ........................................................................... 29
Sample Kit Lists .................................................................................... 32
Pb
All parts listed in this catalog are lead free and RoHS compliant.
NOTICE
Laird’s products or subcomponents are not specifically designed or tested by Laird for
use in any medical applications, surgical applications, medical device manufacturing, or
any similar procedure or process requiring approval, testing, or certification by the United
States food and drug administration or other similar Governmental entity. Applications
with unusual environmental requirements such as military, medical, life-support or
Life-sustaining equipment are specifically not recommended without additional testing
for such application.
FERRITE EMI CABLE CORES
FERRITE MATERIAL COMPARISON
LF, 28 & HF MATERIAL IMPEDANCE VS FREQUENCY (300 KHz - 2 GHz)
Impedance Materials for Cable & Wiring Harness Cores
HF
LF Low Frequency
28 Broadband High Performance
28
Impedance (Z) in Ohms (Ω)
HF High Frequency
LF
0.3
0.5
1
5
10
50
100
1000
2000
Frequency (MHz)
DESIGN & SELECTION “RULES OF THUMB”
SELECT THE APPROPRIATE FERRITE MATERIAL
For the EMI frequency range to be attenuated, refer to cable core material impedance vs.frequency chart above.
FERRITE MATERIAL COMPOSITION AFFECTS CORE PERFORMANCE MOST
High-performance material is best. Cheap, low-performance materials require the use of larger, heavier cores.
SHAPE (DESIGN) AND MASS OF THE FERRITE CORE SIGNIFICANTLY AFFECT IMPEDANCE
DON’T OVER SIZE
Use high-performance ferrite material and select the smallest core that will do the job. High-performance material
allows the use of smaller, lighter and lower cost cores.
SELECT A FERRITE CORE THAT FITS OVER THE CABLE’S OUTSIDE DIMENSIONS
Core should slide easily over the cable during installation.
WHEN POSSIBLE, INSTALL A CABLE CORE OVER WIRES IN A COMMON MODE CONFIGURATION
(Out and back lines inside the same ferrite cable core). A differential cable pair inside the same core will make the ferrite core a
common mode choke that is not susceptible to saturation from very high currents.
INSTALL THE FERRITE CORE NEAR THE NOISE SOURCE
ADDITIONAL TURNS THROUGH A CORE WILL PROVIDE MULTIPLE AMOUNTS OF PEAK IMPEDANCE
Example: Two wire turns provide four times the impedance of one turn (pass through) the ferrite core. Also, with each added turn,
the peak impedance shifts to a slightly lower frequency.
TWO-PIECE SPLIT CORES ARE AVAILABLE
One-piece cylindrical or flat ribbon ferrite core shapes are usually preferable, but split cores can be used in applications where
cores cannot slide over cable ends and connectors. Some split cores are available with snap-on plastic cases or metal clips.
SIDE-BY-SIDE IMPEDANCE TESTING OF FERRITE CORES IS THE BEST WAY TO COMPARE
PERFORMANCE OF DIFFERENT CORES
Ferrite core impedance measurement equipment and test methods are not standardized in the industry.
Every ferrite company has their own test methods. Catalog (web site) impedance data cannot be accurately compared.
Optimized, high-performance, low-cost custom part designs are available.
www.laird.com
3
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