U.L. Approved Dual Function
Fuse Resistors
F500 Series
•
•
•
•
•
•
Affords protection for semiconductor devices
Acts as a precision wirewound resistor and a fuse
Allows precise control of fusing point and time lag
Reduces the number of discrete components required
Eliminates unnecessary blowing due to transient conditions
Eliminates fire hazard and circuit board damage due to overheated components
Electrical Data
IRC
Style
F501
F502
F503
F504
F505
F506
F507
F508
F509
F510*
F511*
F512*
F513*
F514*
F515*
F516*
F517*
F518*
F519*
F520*
F521*
F522*
F523*
F524*
F525*
F526*
F527*
F528*
Steady State
Resistance
Dissipation
(ohms)
Current
(watts)
0.2
0.2
0.5
0.5
0.5
1
1
1
2
2
2
5
5
5
10
10
10
20
20
20
50
50
50
100
100
100
200
200
2.2A
2.2A
1.4A
1.4A
1.4A
1.0A
1.0A
1.0A
700ma
700ma
700ma
450ma
400ma
350ma
300ma
300ma
200ma
220ma
220ma
150ma
140ma
130ma
80ma
100ma
80ma
60ma
70ma
60ma
1
1
1
1
1
1
1
1
1
1
1
1
0.8
0.6
0.9
0.9
0.4
1
1
0.4
1
0.8
0.3
1
0.6
0.4
1
0.8
Blow Condition I
Current
10A
10A
6A
6A
6A
4A
4A
4A
3A
3A
3A
2A
1.5A
1.0A
1.2A
1.0A
600ma
600ma
600ma
350ma
400ma
350ma
200ma
250ma
200ma
140ma
200ma
150ma
Dissipation Blow Time
(watts)
(T max)
20
20
18
18
18
16
16
16
18
18
18
20
10
5
14
10
3.6
7.2
7.2
2.4
8.0
6.1
2.0
6.2
4.0
2.6
8.0
4.0
500ms
300ms
10sec
500ms
50ms
10sec
500ms
50ms
10sec
200ms
50ms
200ms
50ms
100ms
200ms
100ms
100ms
10sec
100ms
500ms
500ms
100ms
200ms
10sec
200ms
10sec
10sec
100ms
Current
25A
25A
15A
15A
15A
10A
10A
10A
7A
7A
7A
4.5A
4.0A
1.4A
3.0A
1.3A
900ma
900ma
900ma
450ma
600ma
450ma
240ma
300ma
250ma
180ma
250ma
250ma
Blow Condition II
Dissipation
(watts)
125
125
112
112
112
100
100
100
98
98
98
101
80
10
90
17
8
16
16
4
18
10
2.9
9.0
6.2
3.2
12.5
12.5
Blow Time
(T max)
50ms
30ms
100ms
50ms
10ms
100ms
50ms
10ms
50ms
50ms
10ms
50ms
10ms
20ms
10ms
50ms
50ms
100ms
50ms
50ms
50ms
50ms
50ms
100ms
50ms
200ms
100ms
10ms
*UL LISTED - Add "S" To Style Description
Contact factory for specification limits beyond these listed.
General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print.
Wire and Film Technologies Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
A subsidiary of
TT electronics plc
F500 Series Issue October 2008 Sheet 1 of 2
U.L. Approved Dual Function
Fuse Resistors
Capability Data
Resistance Range
Resistance Tolerance
Operating Temperature
TCR
0.2Ω to 200Ω
10% STD, 5% and 2%
-55°C to +150°C
IRC Advanced Film Division
±150ppm <1W, ±50ppm, 1W and above
Intrinsically safe single fusing element - all welded construction - ceramic bobbin - ceramic
shell, air encapsulated.
Flameproof construction
Various quality assurance data options available, including conditioning and plot of blow
time vs. current.
Construction
Physical Data
0.140 ± 0.015
(3.6 ± 0.4mm)
Lead
Length
1.25 Min
(31.75mm)
(Lead Diameter #24 Awg)
0.020” (0.5mmA)
0.400 Max
(10.2 mm)
Ordering Data
Contact factory for ordering information.
Wire and Film Technologies Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
F500 Series Issue October 2008 Sheet 2 of 2
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