Littelfuse MA Varistor Series - Manual

© 2013 Littelfuse, Inc. 187
Revised: October 9, 2013
Varistor Products
MA Varistor Series
Axial Lead / Application Specifi c Varistors > MA Series
Specifi cations are subject to change without notice.
Please refer to www.littelfuse.com/series/ma.html for current information.
MA Series
Description
The MA Series of transient surge suppressors are axial
lead Metal Oxide Varistors (MOVs) for use in a wide
variety of board level industrial and commercial electronic
equipment. They are intended to protect components and
signal/data lines from low energy transients where the
small axial lead package is required.
The MA Series is offered with standard ('S' suffi x) or
tightened ('B' suffi x) clamping voltage.
See MA Series Device Ratings and Specifi cations Table for
part number and brand information.
Features
• 3mm diameter disc size
• Small axial lead package
• Wide operating voltage
range:
V
M(AC)RMS
9V to 264V
V
M(DC)
13V to 365V
• Available in tape and
reel or bulk packaging
• No derating up to
85ºC ambient
• New black epoxy offers
improved performance
for high temperature
Lead-free wave
soldering process.
Absolute Maximum Ratings
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
specifi cation is not implied.
Continuous MA Series Units
Steady State Applied Voltage:
AC Voltage Range (V
M(AC)RMS
) 9 to 264 V
DC Voltage Range (V
M(DC)
) 13 to 365 V
Transient:
Peak Pulse Current (I
TM
)
For 8/20μs Current Wave(See Figure 2) 40 to 100 A
Single-Pulse Energy Range
For 2ms Current Square Wave (W
TM
) 0.06 to 1.7 J
Operating Ambient Temperature Range (T
A
) -55 to +85 °C
Storage Temperature Range (T
STG
) -55 to +125 °C
Temperature Coefficient ( V) of Clamping Voltage (V
C
) at Specified Test Current <0.01 %/°C
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
1000 V
COATING Insulation Resistance 1000 M Ω
• For ratings of individual members of a series, see Device Ratings and Specifi cations chart
MA Varistor Series
Agency Approvals
Agency Agency File Number
None
RoHS