Raychem Circuit Protection, a unit of
Tyco Electronics Corporation, introduces
the LVR series of PolySwitch®resettable
devices. Designed for use in line voltage
applications, the LVR series PPTC (poly-
meric positive temperature coefficient)
devices are rated at 240VAC, permitting
maximum voltages of up to 265VAC, and
are available in hold currents from 50 to
550mA.
The LVR series extends the proven
PolySwitch technology of resettable over-
current protection into higher voltage
applications. When installed in proximity
to potential heat generating components
such as magnetics, FETs, or power resis-
tors, the thermally active devices can help
protect against both overcurrent and
overtemperature faults in power sup-
plies, transformers and control circuits.
The properties of the LVR device can
offer distinct benefits in transformer
protection designs. The surface tem-
perature of the LVR device in the high
resistance state is well within the range
of most transformer winding insulation
ratings. This low temperature operation,
combined with small size, low resistance
and good thermal shock tolerance, can
allow the LVR device to be mounted in
direct contact with the transformer wind-
ings for a faster response to potential
fault conditions.
PolySwitch LVR Series
Resettable Protection Devices
LVR Line Voltage Series of PolySwitch devices for AC line voltage applications
Benefits:
• Helps reduce warranty, service and
repair costs
• Helps provide overcurrent and overtemper-
ature protection
• Low surface temperature in high resistance
state helps provide an effective solution
for protection of transformer windings
• Assists in meeting regulatory requirements
• Compatible with high-volume electronics
assembly
Features:
• Maximum operating voltage of 240VAC
• Maximum interrupt voltage of 265VAC
• Hold currents from 50mA – 550mA
• UL, CSA, and TÜV (IEC) recognized
• Solid-state: able to withstand mechanical
shock and thermal stress
• Low off state resistance
Target Applications:
• Cell phone chargers
• Appliance (range, washing machine,
HVAC) control boards
• Cordless phone and answering machine
power supplies
• Metering, industrial control boards
• Switching power supplies
• Transformers
• Lighting dimmers, ballasts
• AC Motors
Part
number
LVR005
LVR008
LVR012
LVR016
LVR025
LVR033
LVR040
LVR055
Hold
currrent
(A)
0.05
0.08
0.12
0.16
0.25
0.33
0.40
0.55
Voltage
rating
(VAC)
240
240
240
240
240
240
240
240
Max.
interrupt
voltage
(VAC)
265
265
265
265
265
265
265
265
Max.
interrupt
current
135V
AC/240V
AC
(A)
20/1.0
20/1.2
20/1.2
20/2.0
20/3.5
20/4.5
20/5.5
20/5.5
Hold
0.05
0.08
0.12
0.16
0.25
0.33
0.40
0.55
Trip
0.12
0.19
0.30
0.37
0.56
0.74
0.90
1.40
Current
(A)
0.25
0.40
0.60
0.80
1.25
1.25
2.00
2.75
T-t-T
(s)
15.0
15.0
15.0
15.0
18.5
18.5
26.0
26.0
Min.
18.5
7.4
3.0
2.5
1.3
0.83
0.6
0.45
Max.
31.00
12.00
6.50
4.10
2.10
1.24
0.97
0.73
Post-trip
resistance
standard
trip (Ω)
Max.
65.0
26.0
12.0
7.8
3.8
2.6
1.9
1.45
Typical power
dissipation
in the
tripped state
(W)
0.7
0.8
1.0
1.4
1.5
1.7
2.0
3.4
Current ratings
(A)
Max. time-to-trip Resistance
(Ω)
Electrical Characteristics (at 20˚ C)
Product Notes:
1. A PTC device is not a fuse—it is a nonlinear thermistor that limits current. Under a fault condition all PTC devices go into a high resistance state but not open circuit so hazardous voltage
may be present at PTC locations.
2. The devices are intended for protection against occasional overcurrent or overtemperature fault conditions and should not be used when repeated fault conditions or prolonged trip events
are anticipated.
3. For complete information and applications limitations, please visit us at www.circuitprotection.com/lvr/
New
Worldwide Headquarters
308 Constitution Drive, MS R21/2A
Menlo Park, CA USA 94025-1164
Tel (800) 227-7040
(650) 361-6900
Fax (650) 361-2508
PolySwitch, SiBar, miniSMD, and nanoSMD are trademarks of Tyco Electronics Corporation.
All information, including illustrations, is believed to be reliable. Users, however, should independently evaluate the suitability of each product for their application. Tyco
Electronics makes no warranties as to the accuracy or completeness of the information, and disclaims any liability regarding its use. Tyco Electronics’ only obligations are
those in the Company’s Standard Terms and Conditions of Sale for this product, and in no case will Tyco Electronics be liable for any incidental, indirect, or consequential
damages arising from the sale, resale, use, or misuse of the product. Specifications are subject to change without notice. In addition, Tyco Electronics reserves the right to
make changes-without notification to Buyer-to materials or processing that do not affect compliance with any applicable specification.
©2004 Tyco Electronics Corporation. Printed in USA. RCP0045.0304.5000
Europe
Tel 32-16-351321
Fax 32-16-351319
www.circuitprotection.com/lvr/
www.circuitprotection.com.hk (Chinese)
www.raychem.co.jp/polyswitch (Japanese)
Japan
Tel 81-44-900-5110
Fax 81-44-900-5140
Asia Pacific
Tel 852-2738-3401
Fax 852-2735-1185
LVR Devices
1
Figure A Figure B Figure C Figure D
Typical Time-to-Trip Characteristics Thermal Derating Curve
Part
number
LVR005S
LVR005K
LVR008S
LVR008K
LVR012S
LVR012K
LVR016S
LVR016K
LVR025S
LVR025K
LVR033S
LVR033K
LVR040S
LVR040K
LVR055S
LVR055K
Fig.
A
C
A
C
A
C
A
C
B
D
B
D
B
D
B
D
Min.
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Max.
8.3 (0.33)
8.3 (0.33)
8.3 (0.33)
8.3 (0.33)
8.3 (0.33)
8.3 (0.33)
9.9 (0.39)
9.9 (0.39)
9.6 (0.38)
9.6 (0.38)
11.4 (0.45)
11.4 (0.45)
11.5 (0.46)
11.5 (0.46)
14.0 (0.55)
14.0 (0.55)
Min.
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Max.
10.7 (0.43)
12.9 (0.51)
10.7 (0.43)
12.9 (0.51)
10.7 (0.43)
12.9 (0.51)
12.5 (0.50)
13.8 (0.54)
17.4 (0.69)
18.8 (0.74)
16.5 (0.65)
19.0 (0.75)
19.5 (0.77)
20.9 (0.82)
21.7 (0.85)
21.7 (0.85)
Min.
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
4.3 (0.17)
Max.
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
5.8 (0.23)
Min.
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
7.6 (0.30)
Max.
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Min.
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Max.
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
3.8 (0.15)
ABCDE
Dimensions in millimeters (inches)
Installation Notes: LVR parts are not recommended for reflow soldering. Installation where the LVR part is constrained may inhibit proper device function. Visit our web site or
contact your local representative for additional information.
Typical Time-to-Trip of LVR Devices at 20°C Typical Thermal Derating for LVR Devices
Fault Current (A) Temperature (°C)
Time-to-Trip (sec)
Percent of Rated Current
A = LVR005
B = LVR008
C = LVR012
D = LVR016
E = LVR025
F = LVR033
G = LVR040
H = LVR055
