ERZ-C20EK391 Panasonic, ERZ-C20EK391 Datasheet

ERZ-C20EK391

Manufacturer Part Number

ERZ-C20EK391

Description

Varistors ZNR Transient/Surge Absorber Type E

Manufacturer

Panasonic

Datasheet

1.ERZ-C25EK821.pdf (3 pages)

Specifications of ERZ-C20EK391

Product

MOV

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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1.1.2 ZNR Varistor must be operated correctly

ÒZNRÓ Transient/Surge Absorbers (hereafter referred to as ÒZNR VaristorsÓ) may fail in either a short or open-

circuit mode when subjected to severe conditions of electrical, environmental and/or mechanical stresses

(beyond their specified ÒRatingsÓ and ÒConditionsÓ). Worst case failure may result in glowing, flaming or

burnout.

The following Ò

further questions regarding the ÒHandling PrecautionsÓ, please contact our engineering section or factory.

ÒZNR

1.1

1.1.1 ZNR Varistors should not be operated beyond

their specified ÒRatingsÓ or ÒEnvironmental

ConditionsÓ in the Catalog or the Specifications to

prevent them from deterioration, breakdown, flaming

or glowing.

l ZNR Varistors should not be operated exceeding

l ZNR Varistors should not be subjected to

l In case of exposure to repeated surge/

l When

l ZNR Varistors should not be operated beyond

l It is recommended that ZNR Varistors, if not

l ZNR Varistors should not be operated in

l ZNR Varistors should not be operated beyond

l Some safety countermeasures such as a

the application.

under the following conditions to prevent

mechanical damages and ruptures and to

avoid serious injuries;

their specified ÒMaximum Allowable VoltageÓ.

energy levels above their specified ÒMaximum

Energy RatingsÓ.

overvoltage, the ZNR Varistors should not be

subjected to surge currents and energy levels

above the specified maximum ratings in the ÒImpulse

Life RatingÓ section or Individual Specifications.

applied to ZNR Varistors in short durations, the

devices should not be operated beyond their

specified ÒRated PowerÓ.

their specified ÒOperating Temperature RangeÓ.

fused, should be mounted away from other

combustible components.

excess of their specified ÒMaximum Allowable

Voltage RatingÓ.

their ÒMaximum Peak Current RatingsÓ.

protective case covering the Varistor are

recommended; If additonal safety is required for

Safety Precautions

Operating Conditions

Ó Transient/Surge Absorbers, Type E

Ó Transient/Surge Absorbers, Type CK

surge/overvoltages

Safety PrecautionsÓ and ÒApplication NotesÓ should be taken into major consideration. For

are

intermittently

Handling Precautions

ÒZNR

1.1. 3 When ZNR Varistors are used between a live

2. Application Notes

2.1 Usage Precautions

2.1.1 ZNR Varistors should be protected from

part and a electrically conductive chassis, follow

safety countermeasures to avoid electric shock.

A) The metallic chassis should be grounded.

B) The live part should be have a protected

accidental failure by following the cautionary

notes:

l In case of ÒAcross-the Line UseÓ, ZNR

l In case of ÒLine to Ground UseÓ, a short-circuit

The following safety countermeasures (A or B)

are therefore recommended;

A) Connect a Òleakage current circuit breakerÓ in

B) Use current type fuses and a thermal type fuse

Ó Transient/Surge Absorbers, Type E, Type CK

cover to prevent contact and potential electric

shock.

Varistors should be protected by connecting

a fuse in series

condition of the Varistor may not blow the current

type fuse due to the grounding resistance (be-

tween Line and Ground), and may cause flaming

or burnout of the device. (in the worst case)

series to the Varistor to be protected. (See Table 1)

thermally coupled each other. (See

to the devices. (See Table 1)

Table 1)

Rev.02/04

Related parts for ERZ-C20EK391

ERZ-C20EK391 Summary of contents

Page 1

Transient/Surge Absorbers, Type E â ÒZNR Ó Transient/Surge Absorbers, Type CK â 1. Safety Precautions ÒZNRÓ Transient/Surge Absorbers (hereafter referred to as ÒZNR VaristorsÓ) may fail in either a short or open- circuit mode when subjected to severe ...

Page 2

Circuit Design 1 (Selection of Varistor Voltage Rating) 2.2.1 General Precautions In the selection of Varistor Voltage Ratings for line protection, the following general precautions should be taken into consideration; (1)Maximum operating voltage must be lower than the specified ...

Page 3

... ERZC11EK471 ERZC11EK511 f : fuse f : fuse Line to Ground Use Nominal Part Number of ZNR Line Voltage ERZC11CK471 ERZC11CK511 A.C.200 V ERZC11CK821 to to A.C.220 V ERZC11CK511 ERZC11CK821 to A.C.240 V Line to Ground Use Nominal Part Number of ZNR Line Voltage ERZC11EK471 ERZC11EK511 A.C.100 V ERZC11EK821 to to A.C.220 V ERZC11EK511 ERZC11EK821 to A.C.240 V ]] ...

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