Littelfuse DA_DB Varistor Series - Manual

© 2013 Littelfuse, Inc. 157
Revised: May 8, 2013
Varistor Products
DA/DB Varistor Series
Industrial High Energy Terminal Varistors > DA/DB Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/da or /db.html for current information.
HI–ENERGY
MO
V’S
DA/DB Series
DA/DB Varistor Series
Description
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.
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
breakdown along the package surface design that provides
complete electrical isolation of the disc subassembly.
See DA/DB Series Device Ratings and Specifications
table for part number and brand information.
Features
• High energy
absorption capability
W
TM
up to 1050J
• Wide operating
voltage range
V
M(AC)RMS
130V to 750V
• Screw terminals (DA
Series),quick connect
push-on connectors
(DB Series)
• Case design provides
complete electrical
isolation of disc
subassembly
• 40mm diameter disc
• No derating up to
85ºC ambient
• RoHS compliant
Agency Approvals
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Agency Agency File Number
E320116
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.
Continuous DA/DB Series Units
Steady State Applied Voltage:
AC Voltage Range (V
M(AC)RMS
) 130 to 750 V
DC Voltage Range (V
M(DC)
) 175 to 970 V
Transients:
Peak Pulse Current (I
TM
)
For 8/20μs Current Wave (See Figure 2) 40,000 A
Single Pulse Energy Range
For 2ms Current Squarewave (W
TM
) 270 to 1050 J
Operating Ambient Temperature Range (T
A
) -55 to +85 ºC
Storage Temperature Range (T
STG
) -55 to +125 ºC
Temperature Coefficient (a V ) of Clamping Voltage (V
C
) at Specified Test Current <0.01 %/ºC
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
(Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
5000 V
COATING Insulation Resistance 1000 MΩ
RoHS
DA SERIES
DB SERIES