Littelfuse_varistors_catalog_insides_final.pdf

Varistor Products
Industrial High Energy Terminal Varistors > DA/DB Series DA/DB Varistor Series
Description
DA SERIES
The DA and DB Series transient surge suppressors are heavy-duty industrial Metal-Oxide Varistors (MOVs) designed to provide surge protection for motor controls and power supplies used in oil-drilling, mining, and transportation equipment.
These UL recognized varistors have identical ratings and specifications but differ in case construction to provide flexibility in equipment designs.
DB SERIES
DA Series devices feature rigid terminals to ensure secure wire contacts. Both the DA and DB Series feature improved creep and strike distance capability to minimize Agency Approvals
breakdown along the package surface design that provides complete electrical isolation of the disc subassembly.
Agency File Number
See DA/DB Series Device Ratings and Specifications table for part number and brand information.
Features
Series),quick connect push-on connectors V’S
eries

Absolute Maximum Ratings
t'PSSBUJOHTPGJOEJWJEVBMNFNCFSTPGBTFSJFTTFF%FWJDF3BUJOHTBOE4QFDJmDBUJPOTDIBSU Continuous
DA/DB Series
HI–ENERGY MO
For 8/20μs Current Wave (See Figure 2) Single Pulse Energy RangeFor 2ms Current Squarewave (W ) Temperature Coefficient (aV) of Clamping Voltage (V ) at Specified Test Current Hi-Pot Encapsulation (COATING Isolation Voltage Capability) (Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301) 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. DA/DB Varistor Series
Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/da or /db.html for current information.
Varistor Products
Industrial High Energy Terminal Varistors > DA/DB Series DA/DB Series Ratings & Specifications
Note : Average power dissipation of transients not to exceed 2.0W.
Power Dissipation Ratings
Peak Pulse Current Test Waveform
PERCENT OF PEAK V
PERCENT OF R
AMBIENT TEMPERATURE ( oC)
NOTES:1. Peak current Applies to applications rated up to 115VRMS. Peak current is 30kA for applications greater than 115V.
2. Peak current applies to applications rated up to 132VRMS. Peak Current is 30kA for applications greater than 132V.
T = Time from 10% to 90% of PeakT = Rise Time = 1.25 x T Should transients occur in rapid succession, the average power dissipation required is simply the energy Example - For an 8/20 μs Current Waveform:
(watt- seconds) per pulse times the number of pulses per second. The power so developed must be within the specifications shown on the Device Ratings and Specifications table for the specific device. Furthermore, the operating values need to be derated at high temperatures as shown above. Because varistors can only dissipate a relatively small amount of average power they are, therefore, not suitable for repetitive applications that involve substantial amounts of average power dissipation.
DA/DB Varistor Series
Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/da or /db.html for current information.
Varistor Products
Industrial High Energy Terminal Varistors > DA/DB Series Maximum Clamping Voltage
Repetitive Surge Capability
V131DA40 - V751DA40 and V131DB40 - V751DB40
V131DA40 - V751DA40 and V131DB40 - V751DB40
NOTE: If pulse ratings are exceeded, a shift of V +/-10% could result. This type of shift, which normally results in a decrease of V result in the device not meeting the original published specifications, but it does not prevent the device from continuing to function, and to provide ample protection.
Physical Specifications
Environmental Specifications
Operating/Storage
Lead Material
Temperature
Insulating Material meets UL94V–0 requirements.
Humidity Aging
Device Labeling
Thermal Shock
Solvent Resistance
Moisture Sensitivity
V’S
eries

HI–ENERGY MO
DA/DB Varistor Series
Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/da or /db.html for current information.
Varistor Products
Industrial High Energy Terminal Varistors > DA/DB Series Product Dimensions (mm)
DA SERIES
DB SERIES
“A” DIMENSION:
ALL DIMENSIONS ARE MAXIMUM
FILISTER HEAD SCREW - 51mm (2.01)
EXCEPT WHERE NOTED
PAN HEAD SCREW - 53mm (2.09)
44.45 0.75
(1.75 0.03)
15mm (0.59)
25.4 0.75
(1.00 0.03)
M4 INTERNATIONAL
(0.90 0.04)
HOLES 0.23 THRU
BORE 0.370 x 0.370 DP

4.5mm (0.18)
Dimensions in millimeters and (inches).
Part Numbering System
V XX X DA 40
VARISTOR
DISC SIZE (60mm)
SERIES DESIGNATOR
*Refer to Rating & Specifications table
Example:
130 VM(AC) = 131
DA/DB Varistor Series
Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/da or /db.html for current information.

Source: http://www.plextron.com.tw/upload/datasheet2/Littelfuse_MOV_DA_DB.pdf

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