Varistor Products
©2011 Littelfuse, Inc.
Revision: September 25, 2011
BA/BB Varistor Series
Industrial High Energy Terminal Varistors > BA/BB Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ba or /bb.html for current information.
HI–ENERGY MOV’S BA/BB Series
BA/BB Varistor Series
Description
The BA and BB 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,
transportation equipment and other heavy industrial AC line
applications.
These UL– recognized varistors have similar package
construction but differ in size and ratings. The BA models
are rated from 130 to 880V
M(AC)
. The BB models from 1100
to 2800V
M(AC)
.
Both the BA and BB Series feature improved creep and
strike capability to minimize breakdown along the package
surface, a package design that provides complete electrical
isolation of the disc subassembly, and rigid terminals to
ensure secure wire contacts.
See BA/BB Series Device Ratings and Specifications Table
for part number and brand information.
Features
• High energy absorption
capability W
TM
BA Series 3200J
BB Series 10,000J
• Wide operating voltage
range V
M(AC)RMS
BA Series 130V to 880V
BB Series 1100V to 2800V
• Rigid terminals for
secure wire contact
• Case design provides
complete electrical
isolation of disc
subassembly
• Littelfuse largest
packaged disc
60mm diameter
• 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 Specications chart
Agency Agency File Number
E320116 - for BA Series only.
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 BA Series BB Series Units
Steady State Applied Voltage:
AC Voltage Range (V
M(AC)RMS
) 130 to 880 1100 to 2800 V
DC Voltage Range (V
M(DC)
) 175 to 1150 1400 to 3500 V
Transients:
Peak Pulse Current (I
TM
)
For 8/20µs Current Wave (See Figure 2) 50,000 to 70,000 70,000 A
Single Pulse Energy Range
For 2ms Current Squarewave (W
TM
) 450 to 3200 3800 to 10000 J
Operating Ambient Temperature Range (T
A
) -55 to +85 -55 to +85
O
C
Storage Temperature Range (T
STG
) -55 to +125 -55 to +125
O
C
Temperature Coefficient (a
V
) of Clamping Voltage (V
C
) at Specified Test Current <0.01 <0.01 %/
O
C
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
(Dielectric must withstand indicated DC voltage for one minute per MIL–STD–202, Method 301)
5000 5000 V
COATING Insulation Resistance 1000 1000 MΩ
RoHS
BB Series
BA Series
