Datasheet > 135D477X9025T2

135D477X9025T2

更新时间： 2024-02-27 02:04:24

品牌	Logo	应用领域
威世 - VISHAY		电容器
页数	文件大小	规格书
14页	165K
描述
Tantalum Capacitor, Polarized, Tantalum (wet), 25V, 10% +Tol, 10% -Tol, 470uF, Through Hole Mount, AXIAL LEADED

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135D477X9025T2 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Active	包装说明：	,
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8532.21.00.20	Factory Lead Time：	9 weeks
风险等级：	5.66	电容：	470 µF
电容器类型：	TANTALUM CAPACITOR	直径：	9.91 mm
介电材料：	TANTALUM (WET)	ESR：	1800 m Ω
JESD-609代码：	e0	漏电流：	0.006 mA
长度：	19.46 mm	安装特点：	THROUGH HOLE MOUNT
负容差：	10%	端子数量：	2
最高工作温度：	200 °C	最低工作温度：	-55 °C
封装形状：	TUBULAR PACKAGE	封装形式：	Axial
包装方法：	TRAY, PLASTIC	极性：	POLARIZED
正容差：	10%	额定（直流）电压（URdc）：	25 V
纹波电流：	1750 mA	表面贴装：	NO
端子面层：	Tin/Lead (Sn/Pb)	端子形状：	WIRE
Base Number Matches：	1

135D477X9025T2 数据手册

135D

Vishay

www.vishay.com

GUIDE TO APPLICATION

1. AC Ripple Current: Subjecting a capacitor to an AC

voltage causes an AC current to flow through it. The

amplitude of the current is dependent on the impedance

of the capacitor at the frequency of the applied signal:

There will be a point at the lower frequency and

capacitance values when the peak AC voltage will be the

limiting factor on the ripple current - not its heating

effects.

For example:

---

I =

Given a 25 μF, 8 V capacitor in the “C” case code and

assuming a ripple current application at a frequency of

120 Hz, the total maximum allowable peak to peak

voltage at + 25 °C is:

where:

I = Ripple current

V = Applied AC voltage

8 V_F+ 3 V_R= 11 V_pp

Z = Impedance of capacitor (frequency dependent)

In order to allow the full swing of 11 V_ppand not exceed

rated forward or rated reverse, a DC bias of 2.5 V is

assumed to be applied.

This current causes heating in the capacitor because of

I²R losses (R is the equivalent series resistance at the

applied frequency). This heating or power dissipation, is

one of the limiting factors of the capacitor’s ripple current

rating.

From the ”Standard Ratings Table”, the maximum ripple

current at 40 kHz is 0.820 A. Compensating for the lower

frequency from the “Ripple Current Multipliers” tables:

MAXIMUM PERMISSIBLE

I_RMS(120 Hz) = 0.820 A x 0.6 = 0.492 A_RMS

CASE CODE

POWER DISSIPATION

AT + 25 °C (W) IN FREE AIR

This current rating is calculated strictly on the basis of

maximum power dissipation. Now calculate what

impressed voltage this amount of current will cause

across this capacitor.

1.00

1.55

1.75

1.95

Assuming a sinusoidal voltage, calculate the rated peak

to peak current:

These power dissipation ratings are based on a

calculated + 50 °C internal temperature rise in still air. The

maximum allowable ripple currents given in the Standard

and Extended Ratings tables are based on these ratings

and the maximum equivalent series resistance at that

frequency.

I_pp= I_RMSx 2 2 = 0.492 x 2.828 = 1.39 A_pp

_{ppimpressed}= I_ppx Z_C 120 Hz

where:

Z_C120Hz





 ²



ESR²+ (X_C

(120 Hz)

The relationship is written as follows:

P = I²R

ESR = 4  (from “Standard Ratings” table)

where:

P = Maximum power

I = Maximum ripple current

R = Equivalent series resistance

Therefore:

X_C

= 53.1 

212025 x 10^-6

2fC

Therefore:

Z_C

4²+ 53.1²= 53.3 

and

I = ---

V_{ppimpressed}= 1.39 A_ppx 53.3 

= 74.1 V_pp 11 V_pp

where:

R is in 

P is in W

I is in A_RMS

Therefore, the peak voltage of the capacitor is the limiting

factor for the ripple current and can be calculated as

follows:

2. AC Ripple Voltage: In operation, the peak voltage across

the capacitor (DC working voltage plus peak ripple

voltage) must not exceed the rated working voltage of the

capacitor. The DC component of the applied voltage

should be sufficiently large to prevent polarity reversal in

excess of 3 V at + 85 °C or 2 V at 125 °C.

V_Cppallowed

---------------------------------------- ------------------

= 0.206 A_pp

11.0 V

53.3 

Max. I_pp

Z_C

0.206

--------------

= 0.073 A_RMSat 120 Hz

2 2

Revision: 09-Apr-13

Document Number: 40024

For technical questions, contact: tantalum@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

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型号	品牌	描述	获取价格	数据表
135D477X9025T6	VISHAY	Tantalum Capacitor, Polarized, Tantalum (wet), 25V, 10% +Tol, 10% -Tol, 470uF, Through Hol	获取价格
135D477X9030T2	VISHAY	Tantalum Capacitor, Polarized, Tantalum (wet), 30V, 10% +Tol, 10% -Tol, 470uF, Through Hol	获取价格
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