dlm01、
dlm01
请说明一下滤波磁珠和滤波电感的区别。
磁珠由导线穿过铁氧体组成，直流电阻很小，在低频时阻抗也很小，对直流信号几乎没有影响。
在高频（几十兆赫兹以上）时磁珠阻抗比较大，高频电磁场在铁氧体材料上产生涡流，使高频干扰信号转化为热量消耗掉。
磁珠常用于高频电路模块的电源滤波和高频信号回路滤波，抑制EMI干扰。
电感由线圈和磁芯组成，直流电阻较小，电感量较大。电感多用于中低频电路的滤波，侧重于抑制传导性干扰，其应用频率在几十兆赫兹以下。
02
2、请解释电阻、电容、电感封装的含义：0402、0603、0805。
表示的是封装尺寸参数：0402:40*20mil；0603:60*30m；0805:80*50mil。
03
3、请说明以下字母所代表的电容的精度：J、K、M、Z。
J——±5%；
K——±10%；
M——±20%；
Z——+80%~-20%
04
4、请问电阻、电容、电感的封装大小分别与什么参数有关？
电阻封装大小与电阻值、额定功率有关；
电容封装大小与电容值、额定电压有关；
电感封装大小与电感量、额定电流有关。
05
5、电阻选型需要注意哪些参数？
电阻值、精度、功率（在实际电路上换算出承受大电流、大电压）、封装。
06
6、电容选型需要注意哪些参数？
电容值、精度、耐压、封装。
GE FANUC IC660BBD025N **
GE FANUC IC660BBD025S **
VELLINGE ELECTRONICS 471-89-77-19 **
FELLOWS CONDITIONING BOARD 01-01-4357-1 **
FELLOWS SERVO BOARD 01-01-5096-1 **
ORMEC GEN017 **
DYNICS COMPUTER IC15LFGQ6T1W2F14IC **
GE CIRCUIT BOARD 44B294194-001/44A294520-G01 **
GE CIRCUIT BOARD 44B399203-001/44A398788-G01 **
INDUSTRIAL DRIVES POWER SUPPLY PSR3-208/50-01-003 *
CONTROL TECHNIQUES MD-434-00-000
BETA TECH SEVO CONTOLLER AF-SERVO-031-001 **
FANUC A06B-6066-H222 SERVO AMPLIFIER **
FANUC A06B-6066-H008 SERVO AMPLIFIER **
GE FANUC IC660BF827K
GE FANUC IC660CB502B
GE FANUC IC660ELB900H
GE FANUC IC660YB804B
GE FANUC IC660YB841B
GE FANUC IC660YB904B
GE FANUC IC660YB921A
SVG 80035B CPU BOARD **
MODICON AS-B573-010 INPUT MODULE *REPAIRED*
ALLEN BRADLEY 2706-M1D1 MESSAGE VIEW 421D FRN 2.04
ALLEN BRADLEY 1756-IF6I/A ANALOG ISOLATED INPUT MODULE
WOHRLE AV3-240-06-300 **
SQUARE D TBXDES1622 INPUT BASE UNIT
BAILEY INFI 90 CONTROL I/O SLAVE NCIS01**
FEDERAL PIONEER DSP-MKII CONTROL MODULE **
SHIBAURA ROIBOT CRA-101B CONTROLLER 93060005 **
SQUARE D TRANSFORMER 15T3H **
YASKAWA SYSTEM CARD JANCD-MFC03-1 **
ALLEN BRADLEY 1771-P5 POWER SUPPLY MODULE *SEALED*
ALLEN BRADLEY 1394-AM04 AXIS MODULE 3kw
NORDSON HOSE 170631A **
GE FANUC IC660EBA024K **
ROSEMOUNT TRANSMITTER 3051TG2A2B21AB4M5C1 **
OBARA GEAR CASE 1-353440 **
ALLEN BRADLEY 150-A24NB MOTOR CONTROL SOFT START **
FUJI ELECTRIC FRN1.5G9S-4 **
GE FANUC IC660BBD120K *REPAIRED*
DREXELBROOK 506 LEVEL CONTROL AND 700-0207001 PROBE
YASKAWA CONTROLLER JZRCR-XPU01B **
ROSEMOUNT 3051TG3A2B21AM5B4C6 **
ASTRO A901 APPLICATOR HEAD 75388 **
HOKUYO PB9-13AN-01 OBSTACLE SENSOR **
DIODE STACK SC-6D **
ALLEN BRADLEY 20BD8P0A0AYNANA0 POWERFLEX 700 **
ROSEMOUNT 3051TG2AB21AB4M5C6 **
YASKAWA ABSO CARD JANCD-MFC03-2 **
ROSEMOUNT 3051TG3A2B21AS1E5M5B4 **
MANNESMANN DEMAG AF04-D-M01-30-1 **
ALLEN BRADLEY ADJ. FREQUINCY AC MOTOR DRIVE 1332-GAA
XYCOM VMEBUS BOARD XVME-957 **
REMANUFACTURED ALLEN BRADLEY 1336-BDBSP31D
RELIANCE ELECTRIC ELECTRO-CRAFT DM20 SERVO 9101-1302
ABB COMMUNICATION BOARD SDCS-COM-1 REV. G **
ABB COMMUNICATION BOARD YPK112A REV. H **
ABB COMMUNICATION UNIT YPK113A **
ABB KU2001 VARISTORBOARD **
ABB NINT-62 MAIN CIRCUIT BOARD **
ABB NINT-66 MAIN CIRCUIT BOARD **
ABB NXPP-02 MATCHING CARD **
ABB SDCS-UCM-1 REV. A **
ALLEN BRADLEY 1305-BA09A-FR **
ALLEN BRADLEY 2711-K10G8/A REV C FRN 3.13 **
AMCI IPLC-1-1 **
BARBER COLMAN DYNZ-60010 **
CYBEREX 41-09-2304-61 REV. B **
CYBEREX 41-09-2304-62 REV. C **
CYBEREX 41-09-230441 REV. B **
CYBEREX 41-09-315812 REV. D/A **
CYBEREX 41-09-339908 REV. K/R **
FANUC A16B-3200-0070/02A **
ALLEN BRADLEY 1336-PB-SP23D **
GE CONTACTOR 3A01GXA003
WESTINGHOUSE LA3300 CIRCUIT BREAKER **
HARDY INSTRUMENTS HI STH06-450 **
ROSEMOUNT 1151DP4E12D1B1C6 **
SCHIELE SWITCH GEAR 2.48.145.16 **
ABB IMAS011 ANALOG OUTPUT MODULE **
DYNAMATIC 70-47-110 **
SIEMENS 6ES7-313-6CE01-0AB0 **
CUTLER-HAMMER CIRCUIT BREAKER KA3225 W/ AUX TRIP **
ALLEN BRADLEY 20BE1P7A0AYNAND0 POWERFLEX 700 **
ABB 58976539 GATE CIRCUIT CARD NGDR-03C SP KIT **
ABB 6129863-1C **
ALLEN BRADLEY 1771-OFE2/B ANALOG OUTPUT *SEALED*
ALLEN BRADLEY 1771-OQ16/C *SEALED*
ALLEN BRADLEY 1785-KE/C DH+/RS232 INTFC **
ALLEN BRADLEY 20BE9P0A0AYNAND0 POWERFLEX 700 **
BAILEY ANALOG INPUT SLAVE IMASI02 **
BAILEY ANALOG OUTPUT MODULE NAOM01 **
MIYACHI RESISTANCE WELDING CONTROL CY-150A
MODICON AS-P530-OMA POWER SUPPLY **
FANUC A16B-1212-0900/02A **
MARPOSS A90 TOUCH PROBE 4159116601 **
ROSEMOUNT 8712-0507-0021 **
ABB SK825484-AF CONTACTOR EHDB220-20-11
JOSLYN CLARK RDP9-11100
LOT OF 6 CORNELL DUBILIER DCMC662T500DG2B **
VIDEOJET SP356400-15 CONTROLLER BOARD-EXCEL 170I