Features
Applications
■ Axial/radial leaded
Any application that requires extra protection
at elevated ambient temperatures, which the
100 °C trip temperature provides.
■ Rechargeable battery pack protection
■ Cellular phones
■ Laptop computers
■ Fully compatible with current industry
standards
■ Weldable nickel terminals
L
014 S190
4T
■ Very low internal resistance
■ RoHS compliant*
■ Agency recognition:
MF-LS Series - PTC Resettable Fuses
Electrical Characteristics
Ihold
Model
MF-LS180
MF-LS180L
MF-LS190
MF-LS190RU
MF-LS260
MF-LS300
MF-LS340
V max.
Volts
I max.
Amps
24
24
24
15
24
24
24
100
100
100
100
100
100
100
Itrip
Amperes
at 23 °C
Hold
1.8
1.8
1.9
1.9
2.6
3.0
3.4
Trip
3.8
3.8
4.2
4.2
5.2
6.3
6.8
Initial
Resistance
1 Hour (R1)
Post-Trip
Resistance
Max. Time
to Trip
Tripped
Power
Dissipation
Ohms
at 23 °C
Ohms
at 23 °C
Amperes Seconds
at 23 °C at 23 °C
Watts
at 23 °C
Min.
0.040
0.040
0.030
0.030
0.025
0.015
0.016
Max.
0.068
0.068
0.057
0.057
0.042
0.031
0.027
Environmental Characteristics
Item
Operating/Storage
Temperature
Max.
0.120
0.120
0.100
0.100
0.076
0.055
0.050
9
9
10
10
13
15
17
2.9
2.9
3.0
3.0
5.0
4.0
5.0
Typ.
2.0
2.0
1.9
1.9
2.3
2.0
2.7
Additional Information
Condition
Criteria
Click these links for more information:
-40 °C to +85 °C
Maximum Device Surface
+125 °C
Temperature in Tripped State
PRODUCT TECHNICAL INVENTORY SAMPLES
SELECTOR LIBRARY
Passive Aging
+85 °C, 1000 hours
±10 % typical
resistance change
Humidity Aging
+85 °C, 85 % R.H. 7 days
±5 % typical
resistance change
Vibration
MIL-STD-883C, Method 2007.1
Condition A
No change
CONTACT
Test Procedures And Requirements For Model MF-LS Series
Test
Test Conditions
Accept/Reject Criteria
Visual/Mech. .................................................... Verify dimensions and materials .......................Per MF physical description
Resistance....................................................... In still air @ 23 °C.............................................Rmin ≤ R ≤ R1max
Time to Trip...................................................... At specified current, Vmax, 23 °C.....................T ≤ max. time to trip (seconds)
Hold Current .................................................... 30 min. at Ihold .................................................No trip
Trip Cycle Life.................................................. Vmax, Imax, 100 cycles....................................No arcing or burning
Trip Endurance ................................................ Vmax, 48 hours.................................................No arcing or burning
UL File Number ............................................... E174545
TÜV File Number............................................. R2057213
WARNING
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
*RoHS Directive 2015/863, Mar 31, 2015 and Annex.
Specifications are subject to change without notice. Users should verify actual device performance in their specific
applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last
page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
MF-LS Series - PTC Resettable Fuses
Thermal Derating Chart - Ihold/ Itrip (Amps)
Model
MF-LS180
MF-LS180L
MF-LS190
MF-LS190RU
MF-LS260
MF-LS300
MF-LS340
-40 ºC
3.10 / 6.54
3.10 / 6.54
3.30 / 7.29
3.30 / 7.29
4.30 / 8.60
5.10 / 10.7
5.50 / 11.0
-20 ºC
2.60 / 5.49
2.60 / 5.49
2.80 / 6.19
2.80 / 6.19
3.70 / 7.40
4.40 / 9.24
4.70 / 9.40
0 ºC
2.20 / 4.64
2.20 / 4.64
2.40 / 5.31
2.40 / 5.31
3.10 / 6.20
3.70 / 7.77
4.00 / 8.00
Ambient Operating Temperature
23 ºC
40 ºC
50 ºC
1.80 / 3.80 1.30 / 2.74 1.10 / 2.32
1.80 / 3.80 1.30 / 2.74 1.10 / 2.32
1.90 / 4.20 1.40 / 3.09 1.20 / 2.65
1.90 / 4.20 1.40 / 3.09 1.20 / 2.65
2.60 / 5.20 1.90 / 3.80 1.60 / 3.20
3.00 / 6.30 2.30 / 4.83 1.90 / 3.99
3.40 / 6.80 2.60 / 5.20 2.20 / 4.40
60 ºC
0.90 / 1.90
0.90 / 1.90
1.10 / 2.43
1.10 / 2.43
1.40 / 2.80
1.60 / 3.36
1.90 / 3.80
70 ºC
0.60 / 1.27
0.60 / 1.27
0.70 / 1.55
0.70 / 1.55
1.10 / 2.20
1.20 / 2.52
1.50 / 3.00
85 ºC
0.20 / 0.42
0.20 / 0.42
0.40 / 0.88
0.40 / 0.88
0.60 / 1.20
0.60 / 1.26
0.80 / 1.60
Product Dimensions
A
Model
MF-LS180
MF-LS180L
MF-LS190
MF-LS190RU
MF-LS260
MF-LS300
MF-LS340
Packaging:
B
Min.
24.0
(0.945)
35.0
(1.38)
21.3
(0.839)
19.8
(0.780)
24.0
(0.945)
28.4
(1.118)
24.0
(0.945)
Max.
26.0
(1.024)
37.5
(1.48)
23.4
(0.921)
20.8
(0.819)
26.0
(1.024)
31.8
(1.252)
26.0
(1.024)
Bulk - 500 pcs. per bag.
Tape and Reel - Consult factory.
Min.
4.9
(0.193)
4.9
(0.193)
10.2
(0.402)
13.3
(0.524)
10.8
(0.425)
13.0
(0.512)
14.8
(0.583)
C
Max.
5.2
(0.205)
5.6
(0.22)
11.0
(0.433)
14.3
(0.563)
11.9
(0.469)
13.5
(0.531)
15.9
(0.626)
Min.
0.6
(0.024)
0.6
(0.024)
0.5
(0.020)
0.4
(0.016)
0.6
(0.024)
0.5
(0.020)
0.6
(0.024)
D
Max.
1.0
(0.039)
1.0
(0.039)
1.1
(0.043)
0.76
(0.030)
1.0
(0.039)
1.1
(0.043)
1.0
(0.039)
Min.
4.1
(0.161)
9.6
(0.38)
5.0
(0.197)
8.1
(0.319)
5.0
(0.197)
6.3
(0.248)
4.0
(0.158)
NOTE: Longer lead option available. Consult factory.
Standard Style
“RU” Style
A
A
F
Max.
5.5
(0.217)
10.0
(0.40)
7.6
(0.299)
9.5
(0.374)
7.0
(0.276)
8.9
(0.350)
5.0
(0.197)
Min.
3.8
(0.150)
3.8
(0.150)
4.8
(0.189)
3.8
(0.150)
5.9
(0.232)
6.0
(0.236)
6.0
(0.236)
Max.
4.1
(0.161)
4.2
(0.17)
5.4
(0.213)
4.1
(0.161)
6.1
(0.240)
6.6
(0.260)
6.1
(0.240
DIMENSIONS:
Pkg.
Style
Std.
Std.
Std.
RU
Std.
Std.
Std.
MM
(INCHES)
Typical Part Marking
Represents total content. Layout may vary.
MANUFACTURER'S
TRADEMARK
F
B
B
D
D
D
C
F
F
C
LS180
0144T
DATE CODE
(FIRST DIGIT =
LAST DIGIT OF YEAR;
NEXT THREE DIGITS =
DAY OF YEAR)
PART
IDENTIFICATION
LOT NO.
(T = TAIWAN
S = CHINA)
Terminal material: quarter-hard nickel
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
MF-LS Series - PTC Resettable Fuses
Typical Time to Trip at 23 ˚C
How to Order
MF
MF LS18
-LS 0
MF 180
MF-LS19 L
-L 0
MF S190
-L
RU
MF S260
-LS
MF 300
-LS
340
MF-LS models offer trip temperatures lower than MF-S models for extra protection at
elevated temperatures.
Multifuse Product
Designator
Series
LS = Axial Leaded “Strap”
Component
Hold Current, Ihold
180-340 (1.8 Amps - 3.40 Amps)
Lead Option
RU = Radial Lead Option
10
Time to Trip (Seconds)
MF - LS 180 __
®
1
0.001
1
10
Fault Current
100
(Amps)
Asia-Pacific: Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA: Tel: +36 88 885 877 • Email: eurocus@bourns.com
The Americas: Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
MF-LS, REV. N, 08/15
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
Bourns
PPTC Resettable
Fuses
3312
- ®2 Multifuse
mm SMD® Trimming
Potentiometer
Application Notice
• Users are responsible for independent and adequate evaluation of Bourns® Multifuse® Polymer PTC devices in the user’s
application, including the PPTC device characteristics stated in the applicable data sheet.
•
Polymer PTC devices must not be allowed to operate beyond their stated maximum ratings. Operation in excess of such
maximum ratings could result in damage to the PTC device and possibly lead to electrical arcing and/or fire. Circuits with
inductance may generate a voltage above the rated voltage of the polymer PTC device and should be thoroughly evaluated
within the user’s application during the PTC selection and qualification process.
• Polymer PTC devices are intended to protect against adverse effects of temporary overcurrent or overtemperature
conditions up to rated limits and are not intended to serve as protective devices where overcurrent or overvoltage conditions
are expected to be repetitive or prolonged.
•
In normal operation, polymer PTC devices experience thermal expansion under fault conditions. Thus, a polymer PTC
device must be protected against mechanical stress, and must be given adequate clearance within the user’s application to
accommodate such thermal expansion. Rigid potting materials or fixed housings or coverings that do not provide adequate
clearance should be thoroughly examined and tested by the user, as they may result in the malfunction of polymer PTC
devices if the thermal expansion is inhibited.
• Exposure to lubricants, silicon-based oils, solvents, gels, electrolytes, acids, and other related or similar materials may
adversely affect the performance of polymer PTC devices.
•
Aggressive solvents may adversely affect the performance of polymer PTC devices. Conformal coating, encapsulating,
potting, molding, and sealing materials may contain aggressive solvents including but not limited to xylene and toluene,
which are known to cause adverse effects on the performance of polymer PTCs. Such aggressive solvents must be
thoroughly cured or baked to ensure their complete removal from polymer PTCs to minimize the possible adverse effect
on the device.
• Recommended storage conditions should be followed at all times. Such conditions can be found on the applicable data
sheet and on the Multifuse® Polymer PTC Moisture/Reflow Sensitivity Classification (MSL) note:
https://www.bourns.com/docs/RoHS-MSL/msl_mf.pdf
MFAN 12/18
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and
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Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
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