BHFUSE
BSMD2018 Series Surface Mount PTC Device
Features
Size 0.20*0.18 inch /5.0*4.5 mm
RoHS compliant, lead-free and halogen-free
Fast response to fault current
Low resistance
Low profile
Compatible with high temperature solders
Applications
Computer, Mobile phones, Multimedia
Automotive, Industrial controls, Telephony and broadband
Game machines, Portable electronics, Battery
Electrical Characteristics(25℃)
Part Number
Ihold
(A)
Itrip
(A)
Vmax
(Vdc)
Imax
(A)
Pd typ
(W)
Time to trip
(A)
(Sec)
Rmin
(Ω)
R1max
(Ω)
BSMD2018-030-60V
0.30
0.60
60
10
0.9
1.50
3.00
0.50
2.30
BSMD2018-050-60V
0.55
1.20
60
10
1.0
2.50
3.00
0.20
1.00
BSMD2018-075-60V
0.75
1.50
60
10
1.1
8.00
0.30
0.11
0.63
BSMD2018-100-15V
1.10
2.20
15
35
1.1
8.00
0.40
0.06
0.36
BSMD2018-100-33V
1.10
2.20
33
35
1.1
8.00
0.40
0.06
0.36
BSMD2018-150-15V
1.50
3.00
15
35
1.1
8.00
0.80
0.05
0.17
BSMD2018-200-10V
2.00
4.00
10
35
1.1
8.00
2.40
0.03
0.10
Ihold = Hold current: maximum current device will pass without tripping in 25℃ still air.
Itrip = Trip current: minimum current at which the device will trip in 25℃ still air.
Vmax = Maximum voltage device can withstand without damage at rated current (Imax).
Imax = Maximum fault current device can withstand without damage at rated voltage (Vmax).
Pd typ. = Typical power dissipated from device when in the tripped state at 25℃ still air.
Rmin = Minimum resistance of device in initial (un-soldered) state.
R1max = Maximum resistance of device at 25℃ measured one hour after tripping or reflow soldering of 260℃ for 20 sec.
Caution:Operation beyond the specified ratings may result in damage and possible arcing and flame.
Specifications are subject to change without notice
Revision 2017
Polymer PTC Thermistor
1/5
BHFUSE
BSMD2018 Series Surface Mount PTC Device
WARNING
Users shall independently assess the suitability of these devices for each of their applications.
Operation of these devices beyond the stated maximum ratings could result in damage to the devices and lead to
electrical arcing and/or fire.
These devices are intended to protect against the effects of temporary over-current or over-temperature conditions
and are not intended to perform as protective devices where such conditions are expected to be repetitive or
prolonged in duration.
Exposure to silicon-based oils, solvents, electrolytes, acids, and similar materials can adversely affect the prolonged
of these PPTC devices.
These devices undergo thermal expansion under fault conditions, and thus shall be provided with adequate space
and be protected against mechanical stresses.
Circuits with inductance may generate a voltage (L di/dt) above the rated voltage of the PPTC device.
Thermal Derating Curve
Typical Time-to-Trip At 25℃
Thermal Derating Chart
Part Number
Ambient operating temperature hold current(Ihold)
-40℃
-20℃
0℃
25℃
40℃
50℃
60℃
70℃
85℃
BSMD2018-030
0.48
0.42
0.35
0.30
0.24
0.21
0.17
0.15
0.10
BSMD2018-050
0.87
0.77
0.67
0.55
0.46
0.41
0.36
0.31
0.23
BSMD2018-075
1.19
1.05
0.91
0.75
0.61
0.54
0.47
0.41
0.32
BSMD2018-100
1.71
1.52
1.32
1.00
0.94
0.84
0.74
0.64
0.50
BSMD2018-150
2.38
2.10
1.82
1.50
1.27
1.13
0.99
0.85
0.64
BSMD2018-200
2.95
2.65
2.35
2.00
1.74
1.59
1.44
1.29
1.06
Specifications are subject to change without notice
Revision 2017
Polymer PTC Thermistor
2/5
BHFUSE
BSMD2018 Series Surface Mount PTC Device
Soldering Parameters
Profile Feature
Pb-Free Assembly
Average Ramp-Up Rate(Tsmax to Tp)
3℃/second max
Preheat
-Temperature Min(Tsmin)
-Temperature Max(Tsmax)
-Time(Tsmin to Tsmax)
150℃
200℃
60~180 seconds
Time maintained above:
-Temperature(TL)
-Time(tL)
217℃
60~150 seconds
Peak Temperature(Tp)
260℃
Ramp-Down Rate
6℃/second max
Time 25℃ to Peak Temperature
8 minutes max
Storage Condition
0℃~30℃,30%-60%RH
Recommended reflow methods: IR, vapor phase oven, hot air oven, N2 environment for lead-free.
Recommended maximum paste thickness is 0.25mm.
Devices can be cleaned using standard industry methods and solvents.
Note 1: All temperature refer to topside of the package, measured on the package body surface.
Note 2: If reflow temperatures exceed the recommended profile, devices may not meet the performance requirements.
Environmental Specifications
Test
Conditions
Resistance change
Passive aging
+85°C, 1000 hrs.
±5% typical
Humidity aging
+85°C, 85% R.H. , 168 hours
±5% typical
Thermal shock
+85°C to -40°C, 20 times
±33% typical
Resistance to solvent
MIL-STD-202,Method 215
No change
Vibration
MIL-STD-202,Method 201
No change
Ambient operating conditions : - 40 °C to +85 °C
Maximum surface temperature of the device in the tripped state is 125 °C
Specifications are subject to change without notice
Revision 2017
Polymer PTC Thermistor
3/5
BHFUSE
BSMD2018 Series Surface Mount PTC Device
Physical Dimensions & Recommended Pad Layout (mm)
1.50
A
1.50
D
Part Number
4.60
B
010
050
B
3.40
E
Marking
Quantity
BSMD2018-030-60V
B030
BSMD2018-050-60V
C
A
B
C
D
E
Min
Max
Min
Max
Min
Max
Min
Min
1500
4.72
5.44
4.22
4.93
0.50
1.20
0.30
0.25
B050
1500
4.72
5.44
4.22
4.93
0.50
1.20
0.30
0.25
BSMD2018-075-60V
B075
1500
4.72
5.44
4.22
4.93
0.50
1.20
0.30
0.25
BSMD2018-100-15V
B100
1500
4.72
5.44
4.22
4.93
0.50
1.20
0.30
0.25
BSMD2018-100-33V
B100
1500
4.72
5.44
4.22
4.93
0.50
1.20
0.30
0.25
BSMD2018-150-15V
B150
1500
4.72
5.44
4.22
4.93
0.50
1.20
0.30
0.25
BSMD2018-200-10V
B200
1500
4.72
5.44
4.22
4.93
0.50
1.20
0.30
0.25
Specifications are subject to change without notice
Revision 2017
Polymer PTC Thermistor
4/5
BHFUSE
BSMD2018 Series Surface Mount PTC Device
Tape And Reel Specifications (mm)
Governing
Specifications
BSMD2018-030-60V~
BSMD2018-075-60V
BSMD2018-100-15V~
BSMD2018-150-15V
BSMD2018-200-10V
W
12.0 ± 0.3
12.0 ± 0.3
12.0 ± 0.3
F
5.5 ± 0.05
5.5 ± 0.05
5.5 ± 0.05
E1
1.75 ± 0.1
1.75 ± 0.1
1.75 ± 0.1
D0
1.55 ± 0.05
1.55 ± 0.05
1.55 ± 0.05
D1
1.55min
1.55min
1.55min
P0
4.0 ± 0.1
4.0 ± 0.1
4.0 ± 0.1
P1
8.0 ± 0.1
8.0 ± 0.1
8.0 ± 0.1
P2
2.0 ± 0.05
2.0 ± 0.05
2.0 ± 0.05
A0
3.58 ± 0.1
3.58 ± 0.1
3.58 ± 0.1
B0
4.93 ± 0.1
4.93 ± 0.1
4.93 ± 0.1
T
0.2 ± 0.1
0.2 ± 0.1
0.2 ± 0.1
K0
0.74 ± 0.1
1.04 ± 0.1
1.35 ± 0.1
Leader min
390
390
390
Trailer min
160
160
160
Reel Dimensions
C
φ178 ± 1.0
D
φ60.2 ± 0.5
H
16.0 ± 0.5
W
13.2 ± 1.5
Contact information
SHENZHEN HCHC ELECTRONIC CO., LTD
TEL: 0755-85259917 FAX: 0755-28704432
E-MAIL: sale@hchc-elec.com
Specifications are subject to change without notice
Revision 2017
Polymer PTC Thermistor
5/5
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