PRODUCT DATASHEET
Surface Mount PTC Devices
ASMD0603 Series Surface Mount PTC Devices
ASMD0603 Series Surface Mount PTC Devices
Description
The ASMD0603 series provides miniature surface mount
resettable overcurrent protection with holding current
from 10mA to 1A.
This world’s smallest PTC is suitable for ultra portable
applications where space is at a premium and the device
current is low.
Features
● RoHS compliant and lead-free
● Low profile
● Halogen-free
● Fast response to fault current
● Compact design saves board space
● Compatible with high temperature solders
Agency Approvals
Agency
File Number
E472196
Applications
● Mobile phones and PDAs
● USB peripherals
Regulation
Standard
2002/95/EC
EN14582
JDT Fuse Industrial Co., Ltd
www.jdtfuse.com
● Portable MP3 and media player
● IC VCC protection
● Mobile Internet Device (MID)
Page 1/8
Revised 03/20/23
ASMD0603 Series Surface Mount PTC Devices
Performance Specification
Model
V max
(V dc)
I max
(A)
I hold
I trip
Pd
@25°C
(A)
@25°C
(A)
Typ.
(W)
Maximum
Time To Trip
Resistance
Current
(A)
Time
(Sec)
R i min
R1max
(Ω)
(Ω)
ASMD0603-001
60
20
0.01
0.03
0.5
0.2
1.0
15.0
100
ASMD0603-002
60
20
0.02
0.06
0.5
0.2
1.0
12.0
70.0
ASMD0603-002-9V
9.0
20
0.02
0.06
0.5
0.2
1.0
12.0
70.0
ASMD0603-003
30
20
0.03
0.09
0.5
0.2
1.0
6.00
50.0
ASMD0603-003-9V
9.0
20
0.03
0.09
0.5
0.2
1.0
6.00
50.0
ASMD0603-004
15
20
0.04
0.12
0.5
0.2
1.0
4.00
40.0
ASMD0603-004-24V
24
20
0.04
0.12
0.5
0.2
1.0
4.00
40.0
ASMD0603-005
15
20
0.05
0.15
0.5
0.25
1.0
3.80
30.0
ASMD0603-005-9V
9.0
20
0.05
0.15
0.5
0.25
1.0
3.80
30.0
ASMD0603-010
15
40
0.10
0.30
0.5
0.5
1.0
0.90
8.00
ASMD0603-010-24V
24
40
0.10
0.30
0.5
0.5
1.0
0.90
8.00
ASMD0603-020
9.0
40
0.20
0.50
0.5
1.0
0.6
0.55
3.50
ASMD0603-020-16V
16
40
0.20
0.50
0.5
1.0
0.6
0.55
3.50
ASMD0603-025
9.0
40
0.25
0.55
0.5
8.0
0.08
0.50
3.00
ASMD0603-025-16V
16
40
0.25
0.55
0.5
8.0
0.08
0.50
3.00
ASMD0603-035
6.0
40
0.35
0.75
0.5
8.0
0.1
0.20
1.40
ASMD0603-035-16V
16.0
40
0.35
0.75
0.5
8.0
0.1
0.20
1.40
ASMD0603-050
6.0
40
0.50
1.00
0.5
8.0
0.1
0.10
0.80
ASMD0603-050-12V
12
40
0.50
1.00
0.5
8.0
0.1
0.10
0.80
ASMD0603-060
6.0
40
0.60
1.20
0.5
8.0
0.1
0.08
0.60
ASMD0603-065
6.0
40
0.65
1.30
0.5
8.0
0.1
0.07
0.55
ASMD0603-075
6.0
40
0.75
1.40
0.5
8.0
0.1
0.06
0.45
ASMD0603-100
6.0
40
1.00
2.00
0.5
8.0
0.1
0.05
0.30
I hold = Hold Current. Maximum current device will not trip in 25°C still air.
I trip = Trip Current. Minimum current at which the device will always trip in 25°C still air.
V max = Maximum operating voltage device can withstand without damage at rated current (Imax).
I max = Maximum fault current device can withstand without damage at rated voltage (V max).
Pd
= Power dissipation when device is in the tripped state in 25°C still air environment at rated voltage.
Ri min/max = Minimum/Maximum device resistance prior to tripping at 25°C.
R1max = Maximum device resistance is measured one hour post reflow.
CAUTION : Operation beyond the specified ratings may result in damage and possible arcing and flame.
JDT Fuse Industrial Co., Ltd
www.jdtfuse.com
Page 2/8
Revised 03/20/23
ASMD0603 Series Surface Mount PTC Devices
Environmental Specifications
Test
Resistance change
change
Resistance
Conditions
Conditions
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
MIL-STD-202,Method 201
No change
Vibration
Ambient operating conditions : - 40 °C to +85 °C
Maximum surface temperature of the device in the tripped state is 125 °C
Percentage of Derated Current
Thermal Derating Curve
200
150
100
50
0
-40
-20
0
20
40
Temperature (°C )
60
80
0.35A
0.4A
0.5A
0.6A
0.65A
0.75A
1.0A
0.25A
0.2A
0.1A
0.05A
0.03A
100
0.02A
0.01A
Average Time-Current Curve
TIME IN SECONDS
10
1
0.1
0.01
JDT Fuse Industrial Co., Ltd
www.jdtfuse.com
0.01
0.1
1.0
CURRENT IN AMPERES
10
Page 3/8
Revised 03/20/23
ASMD0603 Series Surface Mount PTC Devices
Thermal Derading Chart
Maximum ambient operating temperature (Tmao) vs. hold current (Ihold)
Model
- 40°C
- 20°C
0°C
25°C
40°C
50°C
60°C
70°C
85°C
ASMD0603-001
0.016
0.014
0.012
0.010
0.008
0.007
0.006
0.005
0.0035
ASMD0603-002
0.031
0.027
0.024
0.020
0.016
0.014
0.012
0.011
0.007
ASMD0603-003
0.047
0.041
0.036
0.030
0.024
0.021
0.018
0.016
0.0108
ASMD0603-004
0.052
0.048
0.044
0.040
0.032
0.028
0.024
0.020
0.012
ASMD0603-005
0.065
0.060
0.055
0.050
0.040
0.035
0.031
0.025
0.015
ASMD0603-010
0.13
0.12
0.11
0.10
0.08
0.07
0.06
0.05
0.03
ASMD0603-020
0.27
0.25
0.23
0.20
0.17
0.14
0.12
0.10
ASMD0603-025
0.32
0.29
0.27
0.25
0.21
0.18
0.16
0.14
ASMD0603-035
0.47
0.41
0.38
0.35
0.29
0.26
0.24
0.22
0.16
ASMD0603-050
0.67
0.59
0.54
0.50
0.41
0.37
0.34
0.29
0.20
ASMD0603-060
0.81
0.70
0.651
0.60
0.49
0.44
0.41
0.34
0.24
ASMD0603-065
0.87
0.76
0.71
0.65
0.54
0.48
0.44
0.37
0.26
ASMD0603-075
0.98
0.85
0.81
0.75
0.60
0.54
0.44
0.40
0.31
ASMD0603-100
1.19
1.13
1.08
1.00
0.80
0.72
0.59
0.54
0.43
0.07
0.10
Soldering Parameters
TP 20~40 S
TP 260
Critical Zone
Ramp-up
TL 217
TL to TP
tL
Tsmax
Temperature (°C )
3°C/second mac.
Preheat
Tsmin
Ramp-down
ts
Preheat 60~180 s
25
Average Ramp-Up Rate
Pb-Free Assembly
(Ts max to T p)
60~150 s
200
150
Profile Feature
t 25°C to peak
Time
● 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.
JDT Fuse Industrial Co., Ltd
www.jdtfuse.com
-Temperature Min(Ts min)
150°C
-Temperature Max(Ts max)
200°C
-Time(Ts min to Ts max)
60~180 seconds
Time maintained above:
-Temperature(TL)
217°C
-Time(tL)
60~150 seconds
Peak Temperature(Tp)
260°C
Ramp-Down Rate
6°C/second max.
Time 25°C to Peak Temperature 8 minutes max
Storage And Handling:
Storage conditions
0°C~ 35°C,30% ~60%R.H.
Devices may not meet specified performance if storage
conditions are exceeded.
Page 4/8
Revised 03/20/23
ASMD0603 Series Surface Mount PTC Devices
Physical Dimensions(mm.)
C
A
Marking
D
B
E
A
Model
B
C
D
E
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Min.
ASMD0603-001
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-002
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-002-9V
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-003
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-003-9V
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-004
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-005
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-005-9V
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-010
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-010-24V
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-020
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-020-16V
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-025
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-025-16V
1.45
1.85
0.65
1.05
0.40
1.00
0.15
0.10
ASMD0603-035
1.45
1.85
0.65
1.05
0.35
0.90
0.15
0.10
ASMD0603-035-16V
1.45
1.85
0.65
1.05
0.35
1.15
0.15
0.10
ASMD0603-050
1.45
1.85
0.65
1.05
0.55
1.15
0.15
0.10
ASMD0603-050-12V
1.45
1.85
0.65
1.05
0.55
1.15
0.15
0.10
ASMD0603-060
1.45
1.85
0.65
1.05
0.55
1.15
0.15
0.10
ASMD0603-065
1.45
1.85
0.65
1.05
0.55
1.15
0.15
0.10
ASMD0603-075
1.45
1.85
0.65
1.05
0.55
1.15
0.15
0.10
ASMD0603-100
1.45
1.85
0.65
1.05
0.55
1.15
0.15
0.10
Termination Pad Characteristics
Terminal pad materials:Tin-plated Nickel-Copper
Terminal pad solder ability:Meets EIA specification RS186-9E and ANSI/J-STD-002 Category 3
JDT Fuse Industrial Co., Ltd
www.jdtfuse.com
Page 5/8
Revised 03/20/23
ASMD0603 Series Surface Mount PTC Devices
Packaging Quantity and Marking
1.0±0.1
Part Number
1.0±0.1
Quantity
SMD0603 Series
4,000 pcs/reel
Tape & reel packaging per EIA481-1
0.7±0.1
0.7±0.1
Tape And Reel Specifications (mm)
Governing Specifications
P1
EIA 481-1
W
16.00 ± 0.3
P0
4.00 ± 0.10
P1
8.00 ± 0.10
P2
2.00 ± 0.05
A0
5.70 ± 0.10
B0
8.00 ± 0.10
B1max.
12.10
D0
1.50 + 0.1, -0
F
7.50 ± 0.05
E1
1.75 ± 0.10
E2min.
14.25
T
0.60
T1max.
0.10
K0
0.80 ± 0.1
Leader min.
390
Trailer min.
160
Reel Dimensions
A max.
178
N min.
60
W1
16.40 ± 0.5
W2
22.40
P2
D0
P0
E1
F
W
T
D2
K0
A0
B0
H
W4
W3
D
C
W2
W
F
W1
H1
JDT Fuse Industrial Co., Ltd
www.jdtfuse.com
Page 6/8
Revised 03/20/23
ASMD0603 Series Surface Mount PTC Devices
Part Number System
ASMD 0603 -
Special Voltage Rating(Optional)
Holding Current Rating
Device Dimensions:
Length/width(Unit:1/100 inch) Size 1508 mm / 0603 inch
Surface Mount Device
Cross Reference
Cross Reference
Model
Tyco / PolySwitch®
Littelfuse / POLY-FUSE®
Polytronics / EVERFUSE®
ASMD0603-005
-
-
-
ASMD0603-010
-
0603L010
SMD0603P010TF
ASMD0603-020
-
0603L020
SMD0603P020TF
ASMD0603-025
-
0603L025
SMD0603P025TF
ASMD0603-035
-
0603L035
SMD0603P035TF
ASMD0603-050
-
0603L050
SMD0603P050TF
“PolySwitch” is a registered trademark of Tyco Electronics.
“POLY-FUSE” is a registered trademark of Littelfuse,Inc.
“EVERFUSE” is a registered trademark of Polytronics Technology Corp.
JDT Fuse Industrial Co., Ltd
www.jdtfuse.com
Page 7/8
Revised 03/20/23
ASMD0603 Series Surface Mount PTC Devices
Application Notice
1. Operation of these PPTC devices beyond the stated maximum ratings could result in damage to the devices
and lead to electrical arcing and/or fire;
PPTC 器件在超过规定的最大值额定值运行可能会导致器件损坏以及导致电弧和/或火灾。
2. These PPTC devices are intended to protect against the effects of temporary over-current or over-temperature
conditions and shall not be taken for use as switch.
PPTC 的作用是防止临时的过流或过温造成的不良影响,不能当作开关使用。
3. Exposure to lubricants, silicon-based oils, solvents, gels, electrolytes, acids, and other related or similar
materials may adversely affect the performance of PPTC devices.
PPTC 接触润滑剂、硅基油、溶剂、凝胶、电解质、酸和其他相关或类似材料可能会对 PPTC 器件的性能有不利影响。
4. Circuits with inductance may generate a voltage above the rated voltage of the PPTC device and should be
thoroughly evaluated within the user’s application during the PPTC selection and qualification process.
带有电感的电路可能产生高于 PPTC 额定电压的电压,因此客户在选型和认定过程中应进行彻底的评估。
5. Please do not smash, clamp, pull, dent or twist by tool during assembling process,as they may result in the
PPTC damage.
在装配过程中,避免有砸、挤、拉、扭等方式外力作用于 PPTC 本体上,因为它们可能导致 PPTC 损坏。
6. Hand-soldering of PPTC devices on boards is generally not recommended.Users shall define and verify this
process if needed.
不推荐使用手工焊接的方式焊接 PPTC。如果需要,用户需要定义和验证此过程。
7. Recommended storage conditions should be followed at all times , The MSL classification of PPTC is grade 2a.
必须始终遵守推荐的保存条件要求, PPTC 的 MSL 等级为 2 a级。
JDT Fuse Industrial Co., Ltd
www.jdtfuse.com
Page 8/8
Revised 03/20/23
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