Metal-OxideVaristors (MOVs)
Surface Mount Multilayer Varistors (MLVs) > AUML Series
ꢀoHS
AUML Varistor Series
Description
The AUML Series of MultilayerTransient Surge Suppressors
was specifically designed to suppress the destructive
transient voltages found in an automobile. The most common
transient condition results from large inductive energy
discharges. The electronic systems in the automobile, e.g.
antilock brake systems, direct ignition systems, engine
control, airbag control systems, wiper motor controls, etc.,
are susceptible to damage from these voltage transients and
thus require protection. The AUML transient suppressors
have temperature independent suppression characteristics
affording protection from -55ºC to 125ºC.
The AUML suppressor is manufactured from semiconducting
ceramics which offer rugged protection and excellent
transient energy absorption in a small package. The devices
are available in ceramic leadless chip form, eliminating lead
inductance and assuring fast speed of response to transient
surges. These Suppressors require significantly smaller
space and land pads than SiliconTVS diodes, offering greater
circuit board layout flexibility for the designer.
SizeTable
Metric
3216
3225
4532
5650
EIA
1206
1210
1812
2220
Also see the Littelfuse ML, MLN and MLE Series of
Multilayer Suppressors.
Features
Applications
•
•
•
AEC - Q200 compliant
RoHS Compliant
•
•
High peak surge
current capability
•
Suppression of
inductive switching
or other transient
events such as EFT
and surge voltage at
the circuit board level
MLN Series)
•
•
•
Provides on-board
transient voltage
protection for ICs
and transistors
Low Profile, compact
industry standard chip
size; (1206, 1210, 1812
and 2220 Sizes)
Load Dump energy
rated per SAE
Specification J1113
•
Leadless, surface
mount chip form
Used to help achieve
electromagnetic
compliance of
•
•
Inherent bidirectional
clamping
•
ESD protection for
components sensitive
to IEC 61000-4-2
(Level 4), MIL-STD-
883C, Method 3015.7,
and other industry
specifications (See
Also the MLE or
•
•
“Zero” Lead Inductance
No Plastic or epoxy
packaging assures
better than 94V-0
flammability rating
end products
Variety of energy
ratings available
Replace larger surface
mountTVS Zeners in
many applications
•
No temperature derating
up to 125ºC ambient
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart.
Continuous
AUML Series
Units
Steady State Applied Voltage:
DC Voltage Range (VM(DC)
)
18, 24, 48, 68
V
Transient:
Load Dump Energy, (WLD)
Jump Start Capability (5 minutes), (VJUMP
1.5 to 25
48
-55 to +125
-55 to +150
<0.01
J
V
)
Operating AmbientTemperature Range (TA)
StorageTemperature Range (TSTG
Temperature Coefficient (αV) of Clamping Voltage (VC) at Specified Test Current
OC
)
OC
%/OC
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.
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17