V18AUMLA2220H Littelfuse Inc, V18AUMLA2220H Datasheet - Page 5

• Manufacturer Part Number: V18AUMLA2220H
• Description: VARISTOR MULTI AUTO 18V SMD 2220
• Manufacturer: Littelfuse Inc
• Series: AUMLr

Specifications of V18AUMLA2220H

• Package / Case: 2220 (5750 Metric)
• Varistor Voltage: 32V
• Number Of Circuits: 1
• Maximum Ac Volts: 14VAC
• Maximum Dc Volts: 18VDC
• Energy: 25J
• Voltage Rating Dc: 18 V
• Voltage Rating Ac: 14 V
• Clamping Voltage: 40 V
• Surge Energy Rating: 25 J
• Operating Temperature Range: - 55 C to + 125 C
• Current Rating: 10 A
• Dimensions: 5 mm W x 5.7 mm L x 3 mm H
• Mounting: SMD/SMT
• Technology: Multilayer Single
• Clamping Current: 10A
• Dc Voltage Rating (max): 18VDC
• Operating Temp Range: -55C to 125C
• Size Code: 2220
• Product Length (mm): 5.7mm
• Product Depth (mm): 5mm
• Product Height (mm): 3mm
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS Compliant
• Current-surge: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/AUML.html for current information.
Lead (Pb) Soldering Recommendations
The principal techniques used for the soldering of
The termination option available for each solder technique is:
The recommended solder for the AUML suppressor is
To avoid the possibility of generating stresses due to
thermal shock, a preheat stage in the soldering process
is recommended, and the peak temperature of the solder
process should be rigidly controlled.
gradient steeper than 4 degrees per second; the ideal
peak temperature is essential to minimize thermal shock.
Once the soldering process has been completed, it
is still necessary to ensure that any further thermal
shocks are avoided. One possible cause of thermal
shock is hot printed circuit boards being removed from
at room temperature. The boards must be allowed to
Lead–free (Pb-free) Soldering Recommendations
Littelfuse offers the Nickel Barrier Termination finish for the
optimum Lead–free solder performance.
flux, but there is a wide selection of pastes and fluxes
available with which the Nickel Barrier parts should be
compatible.
The reflow profile must be constrained by the maximums
Note: the Lead–free paste, flux and profile were used for
evaluation purposes by Littelfuse, based upon industry
standards and practices. There are multiple choices of all
three available, it is advised that the customer explores the
optimum combination for their process as processes vary
considerably from site to site.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > AUML Series
Revision: September 14, 2010
Reflow Solder Profile
Wave Solder Profile
Lead–free Re-flow Solder Profile
Figure 9
Figure 10
Figure 11
300
250
200
150
100
50
0
0.0
0.5
MAXIMUM TEMPERATURE 260˚C
20 - 40 SECONDS WITHIN 5˚C
PREHEAT ZONE
1.0
FIRST PREHEAT
1.5
TIME (MINUTES)
MAXIMUM WAVE 260
RAMP RATE
<3˚C/s
2.0
SECOND PREHEAT
2.5
230
3.0
5.0
o
60 - 150 SEC
C
> 217˚C
3.5
6.0
AUML Varistor Series
4.0
7.0
4.5