POLYSWITCH RESETTABLE
DEVICES
Strap Battery Devices
Littelfuse PolySwitch, a pioneer of polymeric positive
temperature coefficient (PPTC) resettable devices, offers
several material platforms to help protect battery
applications. Each of these material platforms offers
different performance characteristics that allow the
engineer greater design flexibility. PolySwitch devices
for battery protection include SRP, LR4, VTP, VLP,
VLR, MXP and MGP series, disc and special application
strap devices.
BENEFITS
• Many material platforms and device form factors
help provide engineers more design flexibility
• Compatible with high-volume electronics assembly
• Assists in meeting regulatory requirements
• Low-resistance devices increase battery
operating time
APPLICATIONS
• Mobile phone and smart phone battery packs
• Tablet PC battery packs
• Mobile radio battery packs
• Computer battery packs
• Digital camera battery packs
• Portable media player battery packs
• Power tools (charge line)
FEATURES
• RoHS compliant
• Lead-free versions of all devices are available
• Broad range of resettable devices available
• Current ratings from 1.1A to 13A
• Voltage ratings from 6V to 30V
• Agency recognition: UL, CSA, TÜV
• Fast time-to-trip
• Low resistance
RoHS Compliant, ELV Compliant
Specifications subject to change without notice. ©2016 Littelfuse, Inc.
PolySwitch Resettable Devices
Strap Battery Devices
Application Selection Guide
The guide below lists PolySwitch strap battery devices which are typically used in applications.
The following pages contain the specifications for the part numbers recommended below.
Once a device is selected, the user should evaluate and test each product for its intended application.
PolySwitch Resettable Devices — Key Device Selection Criteria
Installation Method
Surface-mount
Prismatic
Cordless Phone Battery Packs
NiMH
Cylindrical
Lowest Resistance
Lowest Thermal Cut-off
Protection Application
Mobile Phone Battery Packs
Additional Comments
Li-ion
Refer to Surface-mount Section of this Catalog
MXP370BD
VLP210F
SRP175F
VLR175F
—
Mobile Radio Battery Packs
NiMH
Cylindrical
LR4-380F
SRP350F
—
Computer Battery Packs
NiMH
Li-ion
Cylindrical
Cylindrical
Prismatic
LR4-900F
LR4-1300SSF
Consult Local Rep
VLP270F
LR4-380F
—
—
Consult Local Rep
VTP210GF
—
VLR175F
Custom VTP
Camcorder Battery Packs
NiMH or Li-ion
Prismatic
PDA Battery Packs
Power Tools (Charge Line)
Li-ion
NiCd, NiMH or Li-ion
Prismatic
Cylindrical
VLP220F
Custom LR4
Table B1 — Product Series - Current Rating, Voltage Rating / Typical Resistance
VLR
Hold
Current (A)
1.10
1.20
1.70
1.75
1.80
1.90
2.00
2.10
2.20
2.30
2.50
2.60
2.70
3.10
3.50
3.70
3.80
4.20
4.50
5.50
6.00
7.30
9.00
13.00
Typical Activation Temperature
85°C
—
—
12V/0.025Ω
12V/0.024Ω
—
—
—
—
—
12V/0.015Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
90°C
—
16V/0.053Ω
—
16V/0.032Ω
—
—
—
16V/0.024Ω
16V/0.023Ω
—
—
—
16V/0.015Ω
—
—
—
—
—
—
—
—
—
—
—
90°C
16V/0.054Ω
—
16V/0.041Ω
16V/0.040Ω
—
—
—
16V/0.024Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
120°C
—
—
—
—
6V/0.0105Ω
6V/0.011Ω
—
—
—
—
6V/0.011Ω
—
6V/0.0105Ω
6V/0.0075Ω
—
6V/0.007Ω
—
—
—
—
—
—
—
—
125°C
—
15V/0.123Ω
—
15V/0.070Ω
—
—
30V/0.045Ω
—
—
—
—
—
—
—
30V/0.024Ω
—
—
30V/0.018Ω
—
—
—
—
—
—
125°C
—
—
—
—
—
15V/0.056Ω
—
—
—
—
—
15V/0.031Ω
—
—
—
—
15V/0.020Ω
—
20V/0.016Ω
20V/0.013Ω
20V/0.011Ω
20V/0.009Ω
20V/0.008Ω
20V/0.006Ω
VLP
VTP
MXP
SRP
LR4
Specifications subject to change without notice. ©2016 Littelfuse, Inc.
RoHS Compliant, ELV Compliant
PolySwitch Resettable Devices
Strap Battery Devices
Table B2 — Thermal Derating [Hold Current (A) at Ambient Temperature (°C)]
Maximum Ambient Temperature
Part
Number
-40°C
A
-20°C
0°C
20°C
25°C
40°C
50°C
60°C
70°C
80°C
85°C
85°C Typical Activation
VLR*
VLR170F
VLR175F
VLR175LF
VLR230F
3.5
3.5
3.5
5.0
2.9
2.9
2.9
4.2
2.4
2.4
2.4
3.4
1.84
1.87
1.87
2.52
1.70
1.75
1.75
2.30
1.2
1.3
1.3
1.7
1.0
1.0
1.0
1.3
0.7
0.8
0.8
0.9
0.3
0.3
0.3
0.4
—
—
—
—
—
—
—
—
90°C Typical Activation
VLP*
VLP120UF
VLP175UAF
VLP210F
VLP220F
VLP270F
VTP*
VTP110F
VTP170F
VTP170XSF
VTP175F
VTP175LF
VTP210GF
VTP210SF
2.0
3.2
3.2
3.2
3.2
4.1
4.1
1.7
2.7
2.7
2.7
2.7
3.5
3.5
1.4
2.2
2.2
2.2
2.2
2.9
2.9
1.12
1.80
1.80
1.84
1.84
2.26
2.26
1.10
1.70
1.70
1.75
1.75
2.10
2.10
0.85
1.3
1.3
1.3
1.3
1.6
1.6
0.75
1.0
1.0
1.0
1.0
1.3
1.3
0.7
0.8
0.8
0.8
0.8
1.0
1.0
0.4
0.5
0.5
0.5
0.5
0.7
0.7
0.2
0.3
0.3
0.3
0.3
0.4
0.4
0.1
0.1
0.1
0.1
0.1
0.1
0.1
2.4
3.2
4.3
4.5
5.6
2.1
2.7
3.6
3.8
4.7
1.8
2.3
2.9
3.0
4.0
1.30
1.70
2.31
2.45
3.05
1.20
1.75
2.10
2.20
2.70
1.0
1.2
1.6
1.7
2.2
0.7
1.0
1.3
1.4
1.7
0.6
0.9
1.0
1.1
1.4
0.3
0.5
0.6
0.7
0.9
0.2
0.2
0.3
0.3
0.4
0.1
0.1
0.1
0.1
0.1
Maximum Ambient Temperature
Part
Number
-40°C
A
-20°C
0°C
20°C
25°C
40°C
50°C
60°C
70°C
75°C
80°C
85°C
90°C
120°C Typical Activation
MXP*
MXP180
MXP190BB
MXP250K
MXP270
MXP310
MXP370BD
—
—
—
—
—
—
—
—
—
—
—
—
2.45
2.6
3.6
3.8
5.0
5.0
—
—
—
—
—
—
1.8
1.9
2.5
2.7
3.1
3.7
—
—
—
—
—
—
—
—
—
—
—
—
0.80
0.85
1.3
1.4
1.9
1.9
—
—
—
—
—
—
—
—
—
—
1.0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.3
—
—
120˚C Typical Activation
MGP
MGP450
MGP500
—
—
—
—
—
—
—
—
4.5
5.0
—
—
—
—
2.6
3.0
—
2.0
—
—
—
—
—
—
—
—
Maximum Ambient Temperature
Part
Number
-40°C
A
-20°C
0°C
20°C
25°C
40°C
50°C
60°C
70°C
80°C
85°C
125°C Typical Activation
SRP
SRP120F
SRP175F
SRP200F
SRP350F
SRP420F
LR4
LR4-190F
LR4-260F
LR4-380F
LR4-380XF
LR4-450F
LR4-550F
LR4-600F
LR4-600XF
LR4-730F
LR4-900F
LR4-1300SSF
2.8
3.8
5.4
5.4
6.5
7
.6
8.7
8.7
10.5
12.7
17.9
2.5
3.4
4.9
4.9
5.8
6.9
7
.8
7
.8
9.5
11.4
16.2
2.3
3.1
4.4
4.4
5.3
6.2
7
.1
7
.1
8.6
10.0
14.5
1.9
2.6
3.8
3.8
4.5
5.5
6.0
6.0
7
.3
9.0
13.0
1.86
2.54
3.64
3.64
4.38
5.32
5.86
5.86
7.13
8.50
12.40
1.6
2.2
3.3
3.3
3.9
4.7
5.2
5.2
6.3
7
.5
11.1
1.5
2.0
3.0
3.0
3.6
4.3
4.7
4.7
5.7
6.8
10.3
1.4
1.9
2.8
2.8
3.3
4.0
4.4
4.4
5.4
6.2
9.5
1.2
1.7
2.5
2.5
2.9
3.6
3.9
3.9
4.7
5.5
8.6
1.1
1.4
2.3
2.3
2.6
3.2
3.4
3.4
4.2
4.9
7
.7
1.0
1.3
2.1
2.1
2.4
3.0
3.2
3.2
4.0
4.5
7
.2
1.9
2.5
3.1
5.3
6.3
1.7
2.2
2.8
4.8
5.7
1.5
2.0
2.5
4.3
5.1
1.20
1.75
2.00
3.50
4.20
1.17
1.68
1.97
3.44
4.11
1.0
1.4
1.7
3.0
3.6
0.9
1.3
1.5
2.7
3.3
0.8
1.2
1.4
2.5
3.0
0.6
1.0
1.2
2.1
2.6
0.5
0.9
1.0
1.8
2.2
0.4
0.8
0.9
1.7
2.1
* Product electrical characteristics determined at 25°C.
RoHS Compliant, ELV Compliant
Specifications subject to change without notice. ©2016 Littelfuse, Inc.
PolySwitch Resettable Devices
Strap Battery Devices
Figure B1 — Thermal Derating Curve
A =
B =
C =
D =
E =
F =
LR4
SRP
VTP, VLP, MXP
MGP
VLR
RSD
Figure B1
200
180
160
140
120
100
80
60
40
20
0
-50
-40
-30
-20
-10
0
10
20
30
40
50
60
70
D
C
F
B
A
E
% of Rated Hold and Trip Current
A
B
F
E
80
D
C
90
Temperature (˚C)
Table B3 — Electrical Characteristics
Part
Number
85°C Typical Activation
VLR*
VLR170F
VLR175F
VLR175LF
VLR230F
90°C Typical Activation
VLP*
VLP120UF
VLP175UAF
VLP210F
VLP220F
VLP270F
VTP*
VTP110F
VTP170F
VTP170XSF
VTP175F
VTP175LF
VTP210GF
VTP210SF
120°C Typical Activation
MXP*
MXP180
MXP190BB
MXP250K
MXP270
MXP310
MXP370BD
1.80
1.90
2.50
2.70
3.10
3.70
5.2
4.9
6.2
6.2
9.0
9.0
6
6
6
6
6
6
50
50
50
50
50
50
1.0
1.0
1.0
1.0
1.3
1.3
9.00
9.50
13.50
13.50
17
.50
18.50
5.0
2.0
2.0
2.0
5.0
5.0
0.007
0.007
0.006
0.006
0.003
0.004
0.014
0.015
0.016
0.015
0.012
0.010
0.024
0.024
0.028
0.026
0.018
0.016
B10
B9
B10
B10
B10
B10
1.10
1.70
1.70
1.75
1.75
2.10
2.10
2.7
3.4
3.4
3.6
3.6
4.7
4.7
16
16
16
16
16
16
16
100
100
100
100
100
100
100
1.3
1.4
1.4
1.4
1.4
1.5
1.5
5.50
8.50
8.50
8.75
8.75
10.00
10.00
5.0
5.0
5.0
5.0
5.0
5.0
5.0
0.038
0.030
0.030
0.029
0.029
0.018
0.018
0.070
0.052
0.052
0.051
0.051
0.030
0.030
0.140
0.105
0.105
0.102
0.102
0.060
0.060
B5
B2
B4
B3
B3
B3
B4
1.20
1.75
2.10
2.20
2.70
3.6
3.9
5.0
5.3
6.5
16
16
16
16
16
60
60
60
60
60
1.6
1.8
1.8
1.8
2.5
7
.00
8.75
10.50
11.00
13.50
5.0
5.0
5.0
5.0
5.0
0.039
0.023
0.018
0.017
0.012
0.067
0.041
0.030
0.029
0.018
0.134
0.082
0.060
0.058
0.036
B5
B5
B2
B3
B3
1.70
1.75
1.75
2.30
4.1
4.2
4.2
5.0
12
12
12
12
100
100
100
100
1.4
1.4
1.4
2.5
8.50
8.75
8.75
10.00
5.0
5.0
5.0
5.0
0.018
0.017
0.017
0.012
0.032
0.031
0.031
0.018
0.064
0.062
0.062
0.036
B3
B3
B3
B3
I
H
(A)
I
T
(A)
V
MAX
(V
DC
)
I
MAX
(A)
P
D MAX
(W)
Max Time-to-trip
(A)
(s)
R
MIN
(Ω)
R
MAX
(Ω)
R
1MAX
(Ω)
Figure for
Dimension
* Product electrical characteristics determined at 25°C.
Specifications subject to change without notice. ©2016 Littelfuse, Inc.
RoHS Compliant, ELV Compliant
PolySwitch Resettable Devices
Strap Battery Devices
Table B3 — Electrical Characteristics
Part
Number
120˚C Typical Activation
MGP
MGP450
MGP500
125°C Typical Activation
SRP
SRP120F
SRP175F
SRP200F
SRP350F
SRP420F
LR4
LR4-190F
LR4-260F
LR4-380F
LR4-380XF
LR4-450F
LR4-550F
LR4-600F
LR4-600XF
LR4-730F
LR4-900F
LR4-1300SSF
1.90
2.60
3.80
3.80
4.50
5.50
6.00
6.00
7.30
9.00
13.00
3.9
5.8
8.3
8.3
8.9
10.5
11.7
11.7
14.1
16.7
21.2
15
15
15
15
20
20
20
20
20
20
20
100
100
100
100
100
100
100
100
100
100
100
1.2
2.5
2.5
2.5
2.3
2.8
2.8
2.8
3.3
3.8
4.5
9.5
13.0
19.0
19.0
22.5
27
.5
30.0
30.0
30.0
45.0
50.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
10.0
0.0390
0.0200
0.0130
0.0130
0.0110
0.0090
0.0070
0.0075
0.0060
0.0060
0.0035
0.0720
0.0420
0.0260
0.0260
0.0200
0.0160
0.0140
0.0140
0.0120
0.0100
0.0065
0.102
0.063
0.037
0.037
0.028
0.022
0.019
0.019
0.015
0.014
0.009
B7
B7
B7
B7
B7
B7
B7
B7
B7
B7
B8
1.20
1.75
2.00
3.50
4.20
2.7
3.8
4.4
6.3
7
.6
15
15
30
30
30
100
100
100
100
100
1.2
1.5
1.9
2.5
2.9
6.00
8.75
10.00
20.00
20.00
5.0
5.0
4.0
3.0
6.0
0.085
0.050
0.030
0.017
0.012
0.160
0.090
0.060
0.031
0.024
0.220
0.120
0.100
0.050
0.040
B6
B6
B6
B6
B6
4.50
5.00
9.2
9.2
6
6
50
50
1.5
1.5
25.00
25.00
5.0
5.0
0.0025
0.0025
0.007
0.0065
0.013
0.013
B11
B12
I
H
(A)
I
T
(A)
V
MAX
(V
DC
)
I
MAX
(A)
P
D MAX
(W)
Max Time-to-trip
(A)
(s)
R
MIN
(Ω)
R
MAX
(Ω)
R
1MAX
(Ω)
(Cont’d)
Figure for
Dimension
* Product electrical characteristics determined at 25°C.
Notes
: Hold current: maximum current device will pass without interruption in 20°C still air unless otherwise specified.
I
H
: Trip current: minimum current that will switch the device from low-resistance to high-resistance in 20°C still air unless otherwise specified.
I
T
V
MAX
: Maximum voltage device can withstand without damage at rated current.
I
MAX
: Maximum fault current device can withstand without damage at rated voltage.
: Power dissipated from device when in the tripped state in 20°C still air unless otherwise specified.
P
D
R
MIN
: Minimum resistance of device as supplied at 20°C unless otherwise specified.
R
MAX
: Maximum resistance of device as supplied at 20°C unless otherwise specified.
R
1MAX
: Maximum resistance, measured at 20°C unless otherwise specified, of device one hour after being tripped the first time.
Figures B2-B12 — Dimension Figures
Figure B2
Figure B3
Figure B4
A
A A
C
C C
A
A A
C
C C
A
A A
C
C C
B
B B
F
F F
B
B B
F
F F
B
B B
F
F F
D
D D
E
E E
D
D D
E
E E
D
D D
E
E E
RoHS Compliant, ELV
A A A
Compliant
B
B B
C
C C
B
B B
A
A A
C
Specifications subject to change without notice. ©2016 Littelfuse, Inc.
C C
A A A
C C C
F
F F
F
F F
B
B B
F
F F
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