Datasheet> 器件分类 > 无源元件> RC网络> RC1313EFR-H-.25-2-5/5151

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RC1313EFR-H-.25-2-5/5151: 产品描述RC Network, Isolated, 0.5W, 150ohm, 200V, 0.25uF, Through Hole Mount, 2 Pins, RADIAL LEADED; 产品类别无源元件 RC网络; 文件大小20KB，共2页; 制造商EFC [Electronic Film Capacitors, Inc.]; 标准

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RC1313EFR-H-.25-2-5/5151概述

RC Network, Isolated, 0.5W, 150ohm, 200V, 0.25uF, Through Hole Mount, 2 Pins, RADIAL LEADED

RC1313EFR-H-.25-2-5/5151规格参数

参数名称	属性值
是否无铅	不含铅
是否Rohs认证	符合
Objectid	1981737674
包装说明	RADIAL LEADED
Reach Compliance Code	compliant
电容	0.25 µF
电容负容差	5%
电容正容差	5%
第一元件电阻	150 Ω
长度	18 mm
制造商序列号	RC1313
安装特点	THROUGH HOLE MOUNT
网络类型	ISOLATED
电容器元件数量	1
功能数量	1
阻容元件数量	1
电阻器元件数量	1
端子数量	2
封装形状	RECTANGULAR PACKAGE
额定（直流）电压（URdc）	200 V
额定功率耗散 (P)	0.5 W
电阻容差	10%
电阻器/电容器网络类型	RC NETWORK
座面最大高度	13.5 mm
表面贴装	NO
端子节距	14.27 mm
端子形状	WIRE
宽度	7.5 mm

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ELECTRONIC FILM CAPACITORS, INC.

Reidville Industrial Park * 41 Interstate Lane

WATERBURY, CONNECTICUT 06705

PHONE (203) 755-5629

FAX (203) 755-0659

RESISTOR-CAPACITOR NETWORKS

APPLICATIONS

Noise suppression and contact protection

SERIES RC1313

source

Fig. 1 (across the load)

Fig. 2 (across the contacts)

The circuit to be used is dependent upon particular situations. Either circuit may be enough protection for

your needs. For extreme situations, both "Load" and "Contact" protection may be required.

Recommendations

There are two types of discharges that can damage switching contacts and generate noise:

(1) "Glow Discharges" caused by the ignition of gases between contacts. These develop at about 320 volts at

about a 0.0003 inch gap range and can be sustained at a much wider gap range.

(2) "Arc Discharges" occur at much lower voltages, about 0.5 MV/cm. Minimum voltages and currents are

necessary for "Arc Discharges" to be sustained. Contact material also plays a role in sustained "Arc Discharges".

(see Table 1)

MATERIAL

Silver

Gold

Gold Alloy

Palladium

Platinum

MIN. (VA)

Arcing Voltage

MIN. (IA)

Arcing Current mA

17.5

400

800

700

The function of the RC network is to:

(1) Keep the voltage across the contacts below 300 volts. C> (I

/300)

(2) Keep the rate of voltage change below 1V/µs. C> I

x 10

-6

(3) Keep the current below that described in Table

TABLE 1

Inductors do not instantly "let go" of a current. At the instant a contact opens, the current through the contact

does not want to change. Using Ohms Law (E = IR), we can see that when the contact is closed, the resistance

is essentially zero, making the voltage zero, as well. As the contact opens the resistance begins to increase.

This leads to the generation of a high voltage which is generally destructive to contact life.

Capacitors will restrict an instantaneous change in voltage. A capacitor, therefore is useful to counter the

destructive voltages generated at the switch contacts. When the contacts are closed, the capacitor is out of the

circuit. As the contacts are opened any change in voltage is restricted by the capacitor if its value is large enough

to restrict the voltage change to less than 1 V/µs.

A capacitor alone is not an ideal solution. When the contacts are open, the capacitor charges up to the supply

voltage. As the contact is "made", an inrush of current results limited only by a residual resistance and damage

may still result. For this reason, a resistor is configured in series with the capacitor. The higher the resistance

value the smaller the inrush current and the less effective is the capacitor. The voltage across the contacts when

opened is equal to the load current x resistance. (V = IR) It is recommended to keep V =< supply voltage.

In this case, the maximum resistance of the network (R

) will be equal to the load resistance (R

The above formulas are recommended for determining the RC network parameters. They do not identify all

of the subtleties but should serve as a guideline for effective results.

RC1313EFR-H-.25-2-5/5151

RC1313EFR-H-.25-2-5/5151概述

RC1313EFR-H-.25-2-5/5151规格参数

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