Littelfuse TCMOV Varistor Series - Manual (Page 4)

© 2014 Littelfuse, Inc. 234
Revised: January 16, 2014
Varistor Products
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tcmov34s.html for current information.
TCMOV Varistor Series
Thermally Protected Varistors > TCMOV Series
Lead Material Tin–plated Copper
Soldering
Characteristics Solderability per MIL–STD–202,
Method 208E
Insulating Material
Nylon flame retardant, fiberglass
reinforced polymer meets UL94V–0
requirements
Device Labeling
Marked with LF, part identifier, and
date code
Physical Specifications Environmental Specifications
Wave Solder Profile
Because the TCMOV Series varistors contain a thermal protection
device, care must be taken when soldering the devices into place.
Two soldering methods are possible. Firstly, hand soldering: It is
0
50
100
150
200
250
300
0 0.5 1 1.5 2 2.5 3 3.5 4
TIME(MINUTES)
TE
MPER
AT
URE
(º
C)
Maximum Wave 240C
Lead–free Profile
0
50
100
150
200
250
300
0 0.5 1 1.5 2 2.5 3 3.5 4
TIME(MINUTES)
TEMPE
RAT
UR
E
(ºC)
Maximum Wave 260C
Non Lead–free Profile
recommended to heat–sink the leads of the device. Secondly,
wave–soldering: It is critically important that all preheat stage and
the solder bath temperatures are rigidly controlled.
Figure 5 Figure 6
Part Numbering System
TCMOV 34 S 321 M P
DEVICE FAMILY
Littelfuse Thermally Self Protected MOV
DISC SIZE (mm)
34mm
CERAMIC SHAPE
S: Square
115V to 550V
VM(AC)RMS
M: With Isolated Monitored Switch - Bottom Leads
N: Without Isolated Monitored Switch
Xxxxx
P: Lead-Free and RoHS Compliant
OPTION CODES
X3221: Top leads length 11.9mm+/-0.3mm option (TP devices only)
T: With Isolated Monitored Switch - Top Leads
C: cUR and UR approved for Type 2 SPD
application
No Letter: UR approved for Type 1 SPD application
C
LF9
TCMOV34S321MP
1208
MCOV:320Vac
UR or cURus Recognized
Component Mark
Production Site Code
Littelfuse Mark
Part Number
Production Date Dode
(Year and Week)
Voltage Rating
Device Front View
Device Top View
Part Marking System
Operating/Storage
Temperature -45°C to +75°C
-45°C to +85°C
Humidity Aging
+75°C, 85%R.H., 1000 hours
-/+10% voltage
Thermal Shock
+75°C to -40°C 5 times
-/+10% voltage
Solvent Resistance MIL-STD-202, Method 215F
Moisture Sensitivity Level 1, J-STD-020C