Littelfuse RA Varistor Series Manuel d'utilisateur télécharger pdf (Page 1)

193

Revised: May 8, 2013

Varistor Products

RA Varistor Series

Low Proﬁle / Application Speciﬁc Varistors > RA Series

Speciﬁcations are subject to change without notice.

Please refer to www.littelfuse.com/series/ra.html for current information.

RA Series

RA Varistor Series

Description

The RA Series transient surge suppressors are varistors

(MOVs) supplied in a low-proﬁle box that features a precise

seating plane to increase mechanical stability for secure

circuit-board mounting. This feature makes these devices

suitable for industrial applications critical to vibration. Their

construction permits operation up to 125ºC (ambient)

without derating.

The RA Series are available in voltage ratings up to 275V

M(AC)RMS

, and energy levels up to 140J. These varistors are

used in automotive, motor-control, telecommunication, and

military applications.

See RA Series Device Ratings and Speciﬁcations Table for

part number and brand information.

Features

Agency Approvals

Absolute Maximum Ratings

• For ratings of individual members of a series, see Device Ratings and Speciﬁcations chart

Agency Agency File Number

E320116

LR91788

Continuous RA8 Series RA16 Series RA22 Series Units

Steady State Applied Voltage:

AC Voltage Range (V

M(AC)RMS

) 4 to 275 10 to 275 4 to 275 V

DC Voltage Range (V

M(DC)

) 5.5 to 369 14 to 369 18 to 369 V

Transients:

Peak Pulse Current (I

)

For 8/20μs Current Wave (See Figure 2) 100 to 1200 1000 to 4500 2000 to 6500 A

Single Pulse Energy Range (Note 1)

For 10/1000μs Current Wave (W

) 0.4 to 23 3.5 to 75 70 to 160 J

Operating Ambient Temperature Range (T

) -55 to +125 -55 to +125 -55 to +125 ºC

Storage Temperature Range (T

STG

) -55 to +150 -55 to +150 -55 to +150 ºC

Temperature Coefﬁcient (a

) of Clamping Voltage (V

) at Speciﬁed Test Current <0.01 <0.01 <0.01 %/ºC

Hi-Pot Encapsulation (COATING Isolation Voltage Capability)

(Delectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)

5000 5000 5000 V

COATING Insulation Resistance 1000 1000 1000 MΩ

CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and

operation of the device at these or any other conditions above those indicated in the operational sections of this speciﬁcation is not implied.

RoHS

• Lead–free/RoHS

compliant parts

available (add

sufﬁx "x2749")

• Low proﬁle outline with

precise seating plane

• No derating up to

125ºC ambient

• In-line leads

• Wide operating

voltage range:

M(AC)RMS

: 4 – 275V

M(DC):

5.5 – 369V

• High energy absorption

capability W

up to 140J

• 3 model sizes available

A8, RA16, and RA22

1 2 3 4 5 6 7 8

Résumé du contenu

Page 1 - RA Varistor Series

Page 2

Page 3

Page 4 - Figure 7

Page 5 - RA Series

Page 6 - Figure 12

Page 7 - Maximum Wave 260C

Page 8 - V 200 RA 16

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Naviguer en ligne ou télécharger Manuel d'utilisateur pour Matériel Littelfuse RA Varistor Series. Littelfuse RA Varistor Series User Manual Manuel d'utilisatio

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Naviguer en ligne ou télécharger Manuel d'utilisateur pour Matériel Littelfuse RA Varistor Series. Littelfuse RA Varistor Series User Manual Manuel d'utilisatio

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