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30ST420U

P1-P3P4-P4
121
Revised: June 4, 2010
POLYFUSE
®
Resettable PTCs
© 2010 Littelfuse, Inc
POLYFUSE
®
Resettable PTCs
ST Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ST.html for current information.
ST Series
Axial Lead Battery Strap Type > ST Series
ST Series
The new ST Series device provides reliable, noncycling
protection against overcharging and short circuits events
for rechargeable battery cells where resettable protection
is desired.
Electrical Characteristics
Part Number
I
hold
(A)
I
trip
(A)
V
max
(Vdc)
I
max
(A)
P
d
max.
(W)
Maximum Time
To Trip
Resistance
Agency
Approvals
Current
(A)
Time
(Sec.)
R
min
(Ω)
R
typ
(Ω)
R
1max
(Ω)
15ST120 1.2 2.7 15 100 1.2 6.00 5.00 0.085 0.160 0.220
XX
15ST120S 1.2 2.7 15 100 1.2 6.00 5.00 0.085 0.160 0.220
XX
15ST175 1.75 3.8 15 100 2.5 8.75 5.00 0.050 0.090 0.120
XX
15ST175S 1.75 3.8 15 100 2.5 8.75 5.00 0.050 0.090 0.120
XX
30ST200 2.00 4.4 30 100 1.9 10.00 4.00 0.030 0.060 0.100
XX
30ST350 3.50 6.3 30 100 2.5 20.00 3.00 0.017 0.031 0.050
XX
30ST420 4.20 7.6 30 100 2.9 20.00 6.00 0.012 0.024 0.040
XX
I
hold
= Hold current: maximum current device will pass without tripping in 20°C still air.
I
trip
= Trip current: minimum current at which the device will trip in 20°C still air.
V
max
= Maximum voltage device can withstand without damage at rated current (I max)
I
max
= Maximum fault current device can withstand without damage at rated voltage (V
max
)
P
d
= Power dissipated from device when in the tripped state at 20°C still air.
R
min
= Minimum resistance of device in initial (un-soldered) state.
R
typ
= Typical resistance of device in initial (un-soldered) state.
R
1max
= Maximum resistance of device at 20°C measured one hour after tripping or reflow
soldering of 260°C for 20 sec.
Caution: Operation beyond the specified rating may result in damage and possible arcing
and flame.
Description
Features
Applications
• RoHS compliant and
lead–free
• Weldable Nickel terminals
• Low resistance
• Provides overcurrent
protection at 125°C trip
temperature
• Rechargeable battery cell
protection
Agency Approvals
AGENCY AGENCY FILE NUMBER
E183209
R50119583
Items with S at end of part number identify items with slit lead option. See Dimension Drawing and Part Ordering Number System sections of this document for more information.
122
Revised: June 4, 2010
POLYFUSE
®
Resettable PTCs
© 2010 Littelfuse, Inc.
ST Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ST.html for current information.
Axial Lead Battery Strap Type > ST Series
Ambient Operation Temperature
-40°C -20°C 0°C 23°C 40°C 50°C 60°C 70°C 85°C
Part Number Hold Current (A)
15ST120 1.90 1.70 1.50 1.20 1.00 0.90 0.80 0.70 0.50
15ST120S 1.90 1.70 1.50 1.20 1.00 0.90 0.80 0.70 0.50
15ST175 2.50 2.30 2.00 1.75 1.50 1.30 1.20 1.10 0.90
15ST175S 2.50 2.30 2.00 1.75 1.50 1.30 1.20 1.10 0.90
30ST200 3.20 2.80 2.50 2.00 1.70 1.60 1.40 1.20 0.90
30ST350 5.40 4.80 4.30 3.50 3.00 2.80 2.50 2.20 1.70
30ST420 6.40 5.70 5.10 4.20 3.60 3.30 3.00 2.60 2.10
Temperature Rerating
Temperature Rerating Curve
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
10%
30%
50%
70%
90%
110%
130%
150%
170%
Temperature (°C)
Percentage of Rated Current
Average Time Current Curves
The average time current curves and Temperature Rerating curve performance is affected
by a number or variables, and these curves provided as guidance only. Customer must
verify the performance in their application.
Time in Seconds
Current in Amperes
0.01
0.1
1
10
1 10 100 1000
1.20 A
1.75 A
2.00 A
3.50 A
4.20 A
ST
123
Revised: June 4, 2010
POLYFUSE
®
Resettable PTCs
© 2010 Littelfuse, Inc
POLYFUSE
®
Resettable PTCs
ST Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ST.html for current information.
ST Series
Axial Lead Battery Strap Type > ST Series
Environmental Specifications
Operating/Storage
Temperature
-40°C to +85°C
Maximum Device Surface
Temperature in Tripped State
125°C
Passive Aging
+70°C, 1000 hours
-/+5% typical resistance change
Humidity Aging
+85°C, 85% R.H., 7 days,
-/+5% typical resistance change
Vibration
MIL–STD–883C, Condition A,
No change
Physical Specifications
Lead Material
0.13mm nominal thickness,
quarter-hard Nickel
Insulating Material Polyester tape
Part Marking System
Dimensions
E
B
D1 D2
C
A
SLIT
E
B
D1 D2
C
A
NOMINAL
0.5 x 4.0
(.02”x .15”)
Figure 1
Figure 2
(Items with S at end of part number)
Part
Number
Fig.
ABCD1D2E
Inches mm Inches mm Inches mm
Inches mm Inches mm
Inches mm
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
Min. Min. Min. Min.
Min Max. Min. Max.
15ST120 1 0.78 0.87 19.9 22.1 0.19 0.20 4.9 5.2 0.02 0.04 0.6 1.0 0.22 5.5 0.22 5.5 0.01 0.22 3.9 4.1
15ST120S 2 0.78 0.87 19.9 22.1 0.19 0.20 4.9 5.2 0.02 0.04 0.6 1.0 0.22 5.5 0.22 5.5 0.01 0.22 3.9 4.1
15ST175 1 0.82 0.91 20.9 23.1 0.19 0.20 4.9 5.2 0.02 0.04 0.6 1.0 0.16 4.1 0.16 4.1 0.01 0.16 3.9 4.1
15ST175S 2 0.82 0.91 20.9 23.1 0.19 0.20 4.9 5.2 0.02 0.04 0.6 1.0 0.16 4.1 0.16 4.1 0.01 0.16 3.8 4.2
30ST200
1 0.84 0.92 21.3 23.4 0.40 0.43 10.2 11.0 0.02 0.04 0.5 1.1 0.20 5.0 0.20 5.0 0.19 0.21 4.8 5.4
30ST350
1 1.12 1.25 28.4 31.8 0.51 0.53 13.0 13.5 0.02 0.04 0.5 1.1 0.25 6.3 0.25 6.3 0.24 0.26 6.0 6.6
30ST420
1 1.20 1.28 30.6 32.4 0.51 0.54 12.9 13.6 0.02 0.04 0.5 1.1 0.20 5.0 0.20 5.0 0.24 0.26 6.0 6.7
Lot Number
(Contact Littelfuse
for additional
information)
ST
120
XX9U
Product Series
Current Rating
Littelfuse
Trademark
Top Side
P1-P3P4-P4

30ST420U

Mfr. #:
Buy 30ST420U
Manufacturer:
Littelfuse
Description:
Resettable Fuses - PPTC PTC 30V POLYFUSE STRAP TYPE 4.20A
Lifecycle:
New from this manufacturer.
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