ROA-100V470MI6# datasheet, PDF

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ROA-100V470MI6#: DescriptionCAP ALUM; CategoryPassive components; File Size7MB，255 Pages; ManufacturerELNA

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ROA-100V470MI6# Overview

CAP ALUM

ROA-100V470MI6# Parametric

Parameter Name	Attribute value
capacitance	47µF
Tolerance	±20%
Voltage - Rated	100V
ESR (equivalent series resistance)	-
Service life at different temperatures	1000 hours at 85°C
Operating temperature	-40°C ~ 85°C
polarization	polarization
grade	-
application	Audio
Ripple current @ low frequency	230mA @ 120Hz
Ripple current @ high frequency	299mA @ 100kHz
lead spacing	0.197"（5.00mm）
size/dimensions	0.492" diameter (12.50mm)
Height - Installation (maximum)	1.063"（27.00mm）
Surface mount pad dimensions	-
Installation type	Through hole
Package/casing	Radial, Can

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Electronic Components

High Quality

CAPACITORS

CONDUCTIVE POLYMER HYBRID ALUMINUM ELECTROLYTIC CAPACITORS

ALUMINUM ELECTROLYTIC CAPACITORS WITH CONDUCTIVE POLYMER SOLID ELECTROLYTE

ALUMINUM ELECTROLYTIC CAPACITORS

ELECTRIC DOUBLE LAYER CAPACITORS “DYNACAP

PLASTIC FILM CAPACITORS

CO., LTD.

CAT.No.2017/2018E

■

About the Sn whisker

1. Sn whisker-generating mechanism on the lead wire

On the surface of the lead wire, Sn and aluminum will get mixed instead of getting dissolved.

The surface condition is complex, aluminum will expand due to the heat and humid causing the oxidation

and hydration. This reaction will cause the inner stress and influence the development of the whisker.

2. Generation control of the Sn whisker

In the past, Sn whisker was reduced by adding a lead(Pb). Aluminum electrolytic capacitor was also using

the Sn-plate with Pb on the lead wire.

But due to environmental regulation such as the “ELV” and “RoHS”, Pb was strictly prohibited since 2000.

Lead wire not containing the Pb was used, which caused the Sn whisker problem to happen again.

surface was to clean the lead terminal using the alkali.

Since Sn whisker is influenced by the mixture of aluminum, method of reducing the aluminum on the welding

However since the welding area of the large case size is larger compared to the small ones, whisker will

generate even if it is cleaned by alkali. This whisker will scatter outside of the capacitor and potentially

cause the short-circuit. Countermeasure of keeping the whisker inside the capacitor is being discussed.

3. Prevention of scattering of Sn whisker

In the past Sn-plate with Pb was used and recently plate with Bi is being introduced to prevent the whisker

from generating. However the whisker will still generate under the temperature and moisture condition.

generating.

Therefore, the current method of preventing the whisker will not completely prevent the whisker from

In our company, we are developing and supplying products with design of preventing the whisker from

scattering outside the capacitor.

This design corresponds to series such as the RJD and RJE for 105℃ use, RKD and RPK for 125℃ use.

If it is required for the other series, please feel free to make an inquiry.

Sectional view of capacitor

Standard type

Whisker proof type

Rubber hole

Not covered

Rubber hole

covered

NOTE : Design, Specifications are subject to change without notice.

It is recommended that you shall obtain technical specifications

from ELNA to ensure that the component is suitable for your use.

CAT.No.2017/2018E

ROA-100V470MI6# Related Products

	ROA-100V470MI6#	ROA-25V470MG3#	ROA-35V471MJ6#	ROA-100V221MK9#
Description	CAP ALUM	CAP ALUM	CAP ALUM	CAP ALUM
capacitance	47µF	47µF	470µF	220µF
Tolerance	±20%	±20%	±20%	±20%
Voltage - Rated	100V	25V	35V	100V
Service life at different temperatures	1000 hours at 85°C	1000 hours at 85°C	1000 hours at 85°C	1000 hours at 85°C
Operating temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
polarization	polarization	polarization	polarization	polarization
application	Audio	Audio	Audio	Audio
Ripple current @ low frequency	230mA @ 120Hz	110mA @ 120Hz	795mA @ 120Hz	760mA @ 120Hz
Ripple current @ high frequency	299mA @ 100kHz	143mA @ 100kHz	1.0335A @ 100kHz	988mA @ 100kHz
lead spacing	0.197"（5.00mm）	0.138"（3.50mm）	0.295"（7.50mm）	0.197"（5.00mm）
size/dimensions	0.492" diameter (12.50mm)	0.315" diameter (8.00mm)	0.630" diameter (16.00mm)	0.394" diameter (10.00mm)
Height - Installation (maximum)	1.063"（27.00mm）	0.512"（13.00mm）	1.063"（27.00mm）	0.866"（22.00mm）
Installation type	Through hole	Through hole	Through hole	Through hole
Package/casing	Radial, Can	Radial, Can	Radial, Can	Radial, Can

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