POLYSWITCH RESETTABLE
DEVICES
Line-Voltage-Rated Devices
PolySwitch line-voltage-rated (LVR) devices help protect
electric motors and transformers used in commercial and
home appliances from damage caused by mechanical
overloads, overheating, stall, lost neutral and other
potentially harmful conditions.
The LVR line-voltage product line of polymeric positive
temperature coefficient (PPTC) devices includes
components that are rated for line voltages of 120V and
AC
240V , for up to 2A of operating current at 20C. They
AC
help protect against damage caused by both overcurrent
surges and overtemperature faults. They also offer low
resistance and are compatibly sized with fuse solutions.
Unlike traditional fuses, PolySwitch devices do not
require replacement after a fault event. After power has
been removed and the overcurrent condition eliminated,
the circuit is restored to normal operating condition.
Compared to bimetal breakers, they offer greater flexibility, longer lifespan and lower electromagnetic interference
(EMI).
The PolySwitch LVR devices resettable functionality and latching attributes make them a reliable, cost-effective circuit
protection solution for both intermittent- and continuous-operation motor applications. Their low resistance, fast
time-to-trip, and low profile help circuit designers provide a safe and dependable product, comply with regulatory
agency requirements and reduce warranty repair costs. LVR/LVB series are suitable for line-voltage applications up to
a continuous operating voltage of 240V /120V . RoHS versions of all products are available.
AC AC
BENEFITS APPLICATIONS
Choice of many devices helps provide engineers Electromagnetic loads
with design flexibility
Game machines
Compatible with high-volume electronics assembly
Industrial controls
Assist in meeting regulatory requirements
Lighting ballasts
Higher voltage ratings allow use in new applications
Loudspeakers
Medical equipment
FEATURES
Motors, fans and blowers
RoHS compliant
POS equipment
Broadest range of radial-leaded resettable devices
Satellite video receivers
available in the industry
Security and fire alarm systems
Current ratings from 50mA to 2A
Test and measurement equipment
Line voltage rating of 120V and 240V
AC AC
Transformers
Agency recognition : UL, CSA, TV, CQC
USB hubs, ports and peripherals
Fast time-to-trip
Intelligent appliance
Low resistance
Robotic machine
RoHS
182
RoHS Compliant, ELV Compliant
Specifications subject to change without notice. 2018 Littelfuse, Inc. PolySwitch Resettable Devices
Line-Voltage-Rated Devices
Table L1 Product Series - Current Rating, Voltage Rating/Typical Resistance
Voltage Rating LVR 240V / 120V LVB 240V
AC AC AC
Hold Current (A)
0.050 25.00
0.080 9.800
0.120 4.800
0.160 3.400
0.250 1.700
0.330 1.000
0.400 0.800
0.550 0.590
0.750 0.400
1.000 0.276
1.250 0.209 0.209
1.350
2.000 0.110
Table L2 Thermal Derating [Hold Current (A) at Ambient Temperature (C)]
Part Maximum Ambient Temperature
-20C 0C 20C 25C 40C 50C 60C 70C 85C
Number
LVR
LVR005N 0.08 0.06 0.05 0.05 0.04 0.04 0.03 0.03 0.02
LVR008N 0.12 0.10 0.08 0.08 0.07 0.06 0.05 0.04 0.03
LVR012 0.18 0.15 0.12 0.12 0.10 0.09 0.07 0.06 0.04
LVR016 0.24 0.20 0.16 0.16 0.13 0.11 0.10 0.08 0.05
LVR025 0.38 0.32 0.25 0.25 0.21 0.18 0.15 0.13 0.09
LVR033 0.50 0.42 0.33 0.33 0.27 0.23 0.20 0.17 0.11
LVR040 0.61 0.51 0.40 0.40 0.33 0.28 0.24 0.20 0.14
LVR055 0.80 0.68 0.55 0.54 0.46 0.40 0.35 0.29 0.22
LVR075 1.23 0.98 0.75 0.74 0.60 0.56 0.49 0.45 0.41
LVR100 1.65 1.30 1.00 0.94 0.80 0.75 0.65 0.60 0.55
LVR125 2.06 1.63 1.25 1.20 1.00 0.94 0.81 0.75 0.69
LVR200 3.30 2.60 2.00 1.97 1.60 1.50 1.30 1.20 1.10
LVR075-240 1.23 0.98 0.75 0.74 0.60 0.56 0.49 0.45 0.41
LVR100-240 1.65 1.30 1.00 0.94 0.80 0.75 0.65 0.60 0.55
LVR125-240 2.06 1.63 1.25 1.20 1.00 0.94 0.81 0.75 0.69
LVR200-240 3.30 2.60 2.00 1.97 1.60 1.50 1.30 1.20 1.10
Part Maximum Ambient Temperature
-40C -20C 0C 20C 25C 40C 50C 60C 70C 85C
Number
LVB
LVB125 2.09 1.81 1.53 1.25 1.19 0.99 0.86 0.73 0.60 0.41
180 180
AA
170 170 BB
Figure L1 Thermal Derating Curve 160 160
150 150
140 140
A = LVR075-LVR200
CC
130 130
120 120
B = LVB125
1110 10
100 100
C = LVR005N-LVR055
90 90
80 80
70 70
60 60
AA
50 50
CC
40 40
30 30
BB
20 20
-40 -40 -30 -30 -20 -20 -10 -10 0 0 10 10 20 20 30 30 40 40 50 50 60 60 70 70 80 80 90 90
AmbientAmbient TTemperature (emperature ( ) )
RoHS
183
RoHS Compliant, ELV Compliant
Specifications subject to change without notice. 2018 Littelfuse, Inc.
% Rated Hold and% Rated Hold and TTrip Current rip Current