Resettable PTCs
Radial Leaded PTC
30R Series
®
®
• The 30R Series Resettable devices utilize a unique polymer-based,
Positive Temperature Coefficient (PTC) material to protect electrical
circuits against overcurrent conditions.
• In normal operation, the 30R Series PTC has many conductive paths
and a very low resistance. In an overcurrent condition, the temperature
of the polymer material rises. This dramatically reduces the conductive
paths resulting in an immediate rise in resistance. In this condition, the
device provides circuit protection by significantly limiting the flow of
current. However, once the cause of the initial overcurrent condition
is eliminated, the 30R Series PTC cools down and resets to a low
resistance value permitting the normal current flow to resume.
• The 30R Series is a 30V Radial Leaded Device with a 40A Short
Circuit Rating.
Standard reel quantities:
Part
Number
R30R090
R30R110
R30R135
R30R160
R30R185
R30R250
Reel
Quantity
Part
Number
R30R300
R30R400
30R500
30R600
30R700
30R800
30R900
Reel
Quantity
1500
Bulk Only
500 Per
Container
3000
AGENCY APPROVALS:
Recognized under the Components Program
of Underwriters Laboratory and the Component Acceptance Program of
CSA. TUV approved.
ENVIRONMENTAL SPECIFICATIONS:
Passive Aging:
85°C, 1000 Hours. ±5% typical resistance change.
Humidity Aging:
85°C, 85% R.H., 1000 hours. ±5% typical
resistance change.
Thermal Shock:
85°C / –40°C, 20 times. ±10% typical
resistance change.
Vibration:
MIL-STD 202, Method 201. No resistance change.
Mechanical Shock:
MIL-STD-202, Method 213 test condition I
(100 g’s, 6 sec.). No resistance change.
Max. Surface Temperature:
125°C
Operating/Storage Temperature:
–40°C to 85°C
Rerating Curve for 30R Series
200
Percentage of Rated Current
AGENCY FILE NUMBERS:
UL E183209, CSA LR 108832
PHYSICAL SPECIFICATIONS:
Materials: Leads
30R090-250: Tin plated copper-clad steel, 24 AWG
(0.020" Dia.)
30R300-900: Tin plated copper, 20 AWG (0.032" Dia.)
Lead Solderability:
MIL-STD-202, Method 208E
Coating:
Thermoset Coating
Device Labeling:
Device is marked with the letter ‘L’, amperage rating,
voltage rating & date code.
Packaging:
Standard bulk packaging is 500 pieces per container.
Optional tape and reel packaging per EIA 486-B is also available.
150
100
50
0
-40
-30
-20
-10
0
10
20
30
40
Temperature (°C)
50
60
70
80
90
252
w w w. l i t t e l f u s e . c o m
Resettable PTCs
Radial Leaded PTC
30R Series
Dimensions (Inches)
A
E
A
E
1000
MARKING
Average Time Current Curves
.900A
1.10A
1.35A
1.60A
1.85A
2.50A
3.00A
4.00A
5.00A
6.00A
7.00A
8.00A
9.00A
100
TIME IN SECONDS
10
1
B
MARKING
B
D
D
C
C
Note: Stand-offs only used for 30R090-30R250
Part Number
30R090
30R110
30R135
30R160
30R185
30R250
30R300
30R400
30R500
30R600
30R700
30R800
30R900
‘A’ (Max.)
6.60 (0.26)
6.60 (0.26)
8.89 (0.35)
8.89 (0.35)
10.16 (0.40)
11.43 (0.45)
11.43 (0.45)
13.97 (0.55)
13.97 (0.55)
16.51 (0.65)
19.05 (0.75)
21.59 (0.85)
24.13 (0.95)
‘B’ (Max.)
12.19 (0.48)
14.22 (0.56)
13.46 (0.53)
15.42 (0.60)
15.75 (0.62)
18.29 (0.72)
7.27 (0.68)
20.07 (0.79)
24.89 (0.98)
24.89 (0.98)
26.67 (1.05)
29.21 (1.15)
29.72 (1.17)
‘C’ (Typ.)
5.08 (0.20)
5.08 (0.20)
5.08 (0.20)
5.08 (0.20)
5.08 (0.20)
5.08 (0.20)
5.08 (0.20)
5.08 (0.20)
10.16 (0.40)
10.16 (0.40)
10.16 (0.40)
10.16 (0.40)
10.16 (0.40)
0.1
6
0.01
0.05 0.1
1
10
CURRENT IN AMPERES
100
500
Dimension ‘D’ is 7.62 (0.30") Minimum
Dimension ‘E’ is 3.05 (0.12") Maximum
ORDERING INFORMATION:
Maximum Time
To Trip
Part
I
hold
I
trip
V
max
I
max
P
d
max.
Current
Time
Number
(A)
(A)
(Vdc)
(A)
(W)
(A)
(Sec)
30R090
0.90
1.80
30
40
0.6
4.50
5.9
30R110
1.10
2.20
30
40
0.7
5.50
6.6
30R135
1.35
2.70
30
40
0.8
6.75
7.3
30R160
1.60
3.20
30
40
0.9
8.00
8.0
30R185
1.85
3.70
30
40
1.0
9.25
8.7
30R250
2.50
5.00
30
40
1.2
12.5
10.3
30R300
3.00
6.00
30
40
2.0
15.0
10.8
30R400
4.00
8.00
30
40
2.5
20.0
12.7
30R500
5.00
10.00
30
40
3.0
25.0
14.5
30R600
6.00
12.00
30
40
3.5
30.0
16.0
30R700
7.00
14.00
30
40
3.8
35.0
17.5
30R800
8.00
16.00
30
40
4.0
40.0
18.8
30R900
9.00
18.00
30
40
4.2
40.0
20.0
Ihold
=
Hold Current: maximum current device will sustain for 4 hours without tripping in 20°C still air.
Itrip
=
Trip Current: minimum current at which the device will trip in 20°C 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
=
Power dissipated from device when in the tripped state at 20°C still air.
RIL
=
Minimum resistance of device in initial (un-soldered) state.
RAT
=
Maximum resistance of device at 20°C measured one hour after tripping.
CAUTION: Operation beyond the specified ratings may result in damage and possible arcing and flame.
Resistance
R
IL
(W)
0.070
0.050
0.040
0.030
0.030
0.020
0.020
0.010
0.010
0.005
0.005
0.005
0.005
R
AT
(W)
0.22
0.17
0.13
0.11
0.09
0.07
0.08
0.05
0.05
0.04
0.03
0.02
0.02
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253
DSP and ARM Processors
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