Features
NT
AUTOMOTIVE
C- *R
Q2 o
00 HS
CO an
M d
PL
IA
GRADE
■ High power ratings with higher hold
■ Compliant with AEC-Q200 Rev-D Stress
currents at elevated temperatures
■ Operating temperature range from -40 °C
AE
to 125 °C
■ Low thermal derating factor
■ Standard 1812 footprint size
Test Qualification for Passive Components
in automotive applications
■ Surface mount packaging for automated
assembly
■ Agency recognition:
■ RoHS compliant*
MF-MSHT Series – PTC Resettable Fuses
Electrical Characteristics
Ihold
Model
Vmax
Itrip
Resistance
Volts
42
36
30
30
16
9
9
9
Tripped
Power
Dissipation
at 23 °C
at 23 °C
Watts
cUL
TÜV
Typical
1.2
1.2
1.2
1.5
1.5
1.5
1.5
1.5
E174545
✓
✓
✓
✓
✓
✓
✓
✓
R 50384138
✓
✓
✓
✓
✓
✓
✓
✓
Imax
at 23 °C
Ohms
at 23 °C
MF-MSHT020KX
MF-MSHT035KX
MF-MSHT050KX
MF-MSHT075KX
MF-MSHT110KX
MF-MSHT125KX
MF-MSHT150KX
MF-MSHT175KX
Max. Time
To Trip
Amps
40
40
40
40
40
40
40
40
RMin.
Amps
0.20
1.0
0.35 1.75
0.50
2.5
0.75 3.75
1.10
5.5
1.25 6.25
1.50
6.0
1.75
7.0
0.5
0.3
0.18
0.09
0.05
0.03
0.022
0.018
R1Max.** Amps Seconds
4.5
8.0
0.1
2.6
8.0
0.1
1.6
8.0
0.1
0.85
8.0
5.0
0.45
8.0
5.0
0.30
8.0
5.0
0.20
10.0
5.0
0.17
10.0
5.0
Agency Recognition
AEC-Q200
Compliant
✓
✓
✓
✓
✓
✓
✓
✓
**R1Max. measured 24 hours post reflow
Environmental Characteristics
Item
Additional Information
Condition
Criteria
Operating Temperature
-40 °C to +125 °C
Recommended Storage
+40 °C max. / 70 % R.H. max.
Passive Aging
+85 °C, 1000 hours
R < R1max
Humidity Aging
+85 °C, 85 % R.H. 1000 hours
R < R1max
Thermal Shock
-40 °C to +125 °C, 20 times
R < R1max
Solvent Resistance
MIL-STD-202, Method 215
No change
(marking still legible)
Vibration
MIL-STD-883C, Method 2007.1
Condition A
No change
(Rmin < R < R1max)
Moisture Sensitivity Level
(MSL)
See Note
ESD Classification
Class 6 (per AEC-Q200-2, HBM)
Click these links for more information:
PRODUCT TECHNICAL INVENTORY SAMPLES
SELECTOR LIBRARY
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.
Test Procedures and Requirements
Item
CONTACT
Test Conditions
Accept/Reject Criteria
Visual/Mechanical
Verify dimensions and materials
Per MF physical description
Resistance
In still air @ 23 °C
Rmin ≤ R ≤ Rmax
Time to Trip
At specified current, Vmax, 23 °C, still air
T ≤ max. time to trip (seconds)
Hold Current
30 min. at Ihold, still air
No trip
Trip Cycle Life
Vmax, Imax, 100 cycles
No arcing or burning
Trip Endurance
Vmax, 48 hours
No arcing or burning
Solderability
245 °C ± 5 °C, 5 seconds
95 % min. coverage
Applications
■ Overcurrent surge protection of electronic equipment required to operate at high operating
temperature ranges
■ Robust resettable fault protection for industrial transportation, communication, security, and
consumer electronic equipment
MF-MSHT Series – PTC Resettable Fuses
Product Dimensions
Top View
Side View
A
MARKING
Bottom View
C
D
Recommended Pad Layout
Terminal Material:
ENIG-plated terminals
E
2.95
(.116)
B
1.68
(.066)
A
Model
B
3.10
(.122)
C
Min.
Max.
Min.
Max.
Min.
Max.
4.37
(.172)
4.83
(.190)
3.07
(.121)
3.41
(.134)
0.40
(.016)
0.85
(.033)
4.37
(.172)
4.83
(.190)
3.07
(.121)
3.41
(.134)
0.60
(.024)
1.20
(.047)
4.37
(.172)
4.83
(.190)
3.07
(.121)
3.41
(.134)
0.80
(.031)
1.60
(.063)
1.68
(.066)
D
Min.
E
Min.
0.30
(.012)
0.05
(.002)
MF-MSHT020KX
MF-MSHT035KX
MF-MSHT050KX
MF-MSHT075KX
MF-MSHT110KX
MF-MSHT125KX
MF-MSHT150KX
MF-MSHT175KX
DIMENSIONS:
MM
(INCHES)
Thermal Derating Table - Ihold (Amps)
Model
MF-MSHT020KX
MF-MSHT035KX
MF-MSHT050KX
MF-MSHT075KX
MF-MSHT110KX
MF-MSHT125KX
MF-MSHT150KX
MF-MSHT175KX
-40 °C
0.29
0.51
0.73
1.09
1.60
1.81
2.18
2.54
-20 °C
0.26
0.46
0.66
0.98
1.44
1.64
1.97
2.29
0 °C
0.23
0.41
0.58
0.87
1.28
1.45
1.74
2.03
Ambient Operating Temperature
+23 °C
+40 °C
+50 °C
+60 °C
0.20
0.18
0.16
0.15
0.35
0.31
0.28
0.26
0.50
0.44
0.41
0.37
0.75
0.66
0.61
0.56
1.10
0.97
0.89
0.81
1.25
1.10
1.01
0.93
1.50
1.32
1.22
1.11
1.75
1.54
1.42
1.30
+70 °C
0.13
0.23
0.34
0.50
0.74
0.84
1.01
1.17
+85 °C
0.11
0.20
0.28
0.42
0.62
0.70
0.84
0.98
+125 °C
0.05
0.09
0.14
0.20
0.30
0.34
0.41
0.47
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-MSHT Series – PTC Resettable Fuses
Typical Time to Trip at 23 ˚C
10
G
Time to Trip (Seconds)
1
A
H
F
B
C
E
D
A - MF-MSHT020KX
0.1
B - MF-MSHT035KX
C - MF-MSHT050KX
D - MF-MSHT075KX
E - MF-MSHT110KX
0.01
F - MF-MSHT125KX
G - MF-MSHT150KX
The Time to Trip curves represent typical performance of a device in
a simulated application environment. Actual performance in specific
customer applications may differ from these values due to the
influence of other variables.
H - MF-MSHT175KX
0.001
0.1
1
10
100
Fault Current (Amps)
Typical Part Marking
How to Order
MF - MSHT 035 K X - 2
Represents total content. Layout may vary.
PART IDENTIFICATION:
MF-MSHT020KX = 02
MF-MSHT035KX = 03
MF-MSHT050KX = 05
MF-MSHT075KX = 07
MF-MSHT110KX = 11
MF-MSHT125KX = 12
MF-MSHT150KX = 15
MF-MSHT175KX = 17
®
Multifuse Product Designator
Series
MSHT = 1812 High Temperature Surface Mount Component
Hold Current, Ihold
020 - 175 (0.2 - 1.75 Amps)
07
K = Material Specific Code
X = Multifuse® freeXpansion™ Design
Packaging
-2 = Tape and Reel Packaged per EIA-481
Packaging Quantity
Model
MF-MSHT020KX
MF-MSHT035KX
MF-MSHT050KX
MF-MSHT075KX
MF-MSHT110KX
MF-MSHT125KX
MF-MSHT150KX
MF-MSHT175KX
Packaging Quantity
2,000 pcs. per reel
2,000 pcs. per reel
2,000 pcs. per reel
2,000 pcs. per reel
1,500 pcs. per reel
1,000 pcs. per reel
1,500 pcs. per reel
1,500 pcs. per reel
C
Bi-WEEKLY DATE CODE:
WEEKS 05-06 = C
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-MSHT Series – PTC Resettable Fuses
Solder Reflow Recommendations
Notes:
tp
TP
TL
Temperature
tL
Ts max
RAMP-DOWN
Ts min
•
MF-MSHT models are intended for reflow soldering
(including, but not limited to heating plate, hot air, IR,
nitrogen, and vapor phase).
•
Wave soldering is permissible only if the device is on the top
of the PCB, opposite the heat source.
•
Hand soldering is not recommended for these devices.
•
All temperatures refer to the topside of the device, measured
on the device body surface.
•
If reflow temperatures exceed the recommended profile,
devices may not meet the published specifications.
CRITICAL ZONE
T L TO TP
RAMP-UP
ts
PREHEAT
25
•
Compatible with Pb and Pb-free solder reflow profiles.
•
Excess solder may cause a short circuit.
•
Please refer to the Multifuse® Polymer PTC Resettable Fuse
Soldering Recommendations document for more details.
t 25 °C TO PEAK
Time
Profile Feature
Pb-Free Assembly
Average Ramp-Up Rate (Tsmax to Tp)
3 °C / second max.
PREHEAT:
Temperature Min. (Tsmin)
Temperature Max. (Tsmax)
Time (Tsmin to Tsmax) (ts)
150 °C
200 °C
60~180 seconds
TIME MAINTAINED ABOVE:
Temperature (TL)
Time (tL)
217 °C
60~150 seconds
Peak Temperature (Tp)
260 °C
Time within 5 °C of Actual Peak Temperature (tp)
20~40 seconds
Ramp-Down Rate
6 °C / second max.
Time 25 °C to Peak Temperature
8 minutes max.
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
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-MSHT Series – PTC Resettable Fuses
Packaging Dimensions
18.4*
MAX.
(.72)
185
(7.28)
DIA. MAX.
50
(1.97)
DIA. MIN.
12.4 +2.0/-0*
(.049 +.008/-0)
*MEASURED AT HUB
40.0 ± 0.20
(1.575 ± .008)
10 SPROCKET HOLES
0.6
(.024)
MAX.
4.00 ± 0.10
(.157 ± .004)
1.75 ± 0.10
(.069 ± .004)
2.00 ± 0.05
(.079 ± .002)
1.50 +0.10/-0
(.059 +.004/-0)
DIA.
5.50 ± 0.05
(.217 ± .002)
COVER
TAPE
07
07
07
5.90
(.232)
MAX.
B0
K0
TRAILER
160
(6.30)
MIN.
Model
12.00 ± 0.30
(.472 ± .012)
C
C
C
8.00 ± 0.10
(.315 ± .004)
0.1 MAX.
(.004)
10.25
(.404)
TYP.
A0
LEADER
NO COMPONENT
COMPONENTS
USER DIRECTION OF FEED
390
(15.35)
MIN.
A0
B0
K0
MF-MSHT020KX
~ MF-MSHT075KX
3.66 ± 0.15
(.144 ± .006)
4.98 ± 0.10
(.196 ± .004)
0.95 ± 0.10
(.037 ± .004)
MF-MSHT110KX
3.58 ± 0.10
(.141 ± .004)
4.93 ± 0.10
(.194 ± .004)
1.30 ± 0.10
(.051 ± .004)
MF-MSHT125KX
3.50 ± 0.10
(.138 ± .004)
4.90 ± 0.10
(.193 ± .004)
1.80 ± 0.10
(.071 ± .004)
MF-MSHT150KX
~ MF-MSHT175KX
3.70 ± 0.10
(.146 ± .004)
5.10 ± 0.10
(.201 ± .004)
1.50 ± 0.10
(.059 ± .004)
DIMENSIONS:
MM
(INCHES)
MF-MSHT SERIES, REV. B, 05/21
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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