30R250 データシートの表示（PDF） - Littelfuse, Inc
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30R250 Datasheet PDF : 2 Pages
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Resettable PTCs
Radial Leaded PTC
30R Series
Dimensions (Inches)
A
E
A
E
MARKING
B
MARKING
B
Average Time Current Curves
1000
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)
Dimension ‘D’ is 7.62 (0.30") Minimum
Dimension ‘E’ is 3.05 (0.12") Maximum
‘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)
100
10
1
0.1
6
0.01
0.05 0.1
1
10
100
500
CURRENT IN AMPERES
ORDERING INFORMATION:
Maximum Time
To Trip
Part
Number
Ihold
Itrip
Vmax
Imax
Pd max. Current
Time
(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 =
Itrip
=
Vmax =
Imax =
Pd
=
RIL
=
RAT
=
Hold Current: maximum current device will sustain for 4 hours without tripping in 20°C still air.
Trip Current: minimum current at which the device will trip in 20°C still air.
Maximum voltage device can withstand without damage at rated current (Imax)
Maximum fault current device can withstand without damage at rated voltage (Vmax)
Power dissipated from device when in the tripped state at 20°C still air.
Minimum resistance of device in initial (un-soldered) state.
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
R AT
(W)
(W)
0.070
0.22
0.050
0.17
0.040
0.13
0.030
0.11
0.030
0.09
0.020
0.07
0.020
0.08
0.010
0.05
0.010
0.05
0.005
0.04
0.005
0.03
0.005
0.02
0.005
0.02
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