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參數資料
| 型號： | FM |
| 廠商： | TT Electronics / Welwyn |
| 英文描述： | Fusible Metal Film Resistors |
| 中文描述： | 可熔金屬膜電阻 |
| 文件頁數： | 1/2頁 |
| 文件大小： | 119K |
| 代理商： | FM |
Fusible Metal Film
Resistors
FM Series
Predictable fusing characteristics
Flameproof protection
FM
1
/
4
FM
1
/
2
FM1
0
5
5
2
s
w
C
7
n
w
o
P
5
K
1
R
0
K
7
2
R
0
K
0
1
R
0
s
m
h
o
e
g
n
a
c
n
a
R
0
5
3
0
5
3
0
5
2
s
v
e
g
a
v
e
m
e
n
m
i
0
5
2
C
m
p
p
R
C
T
5
%
e
c
n
a
c
n
a
R
Standard values
E24 preferred
0
0
1
0
2
1
0
5
1
t
w
/
C
e
c
n
a
d
e
p
m
i
m
r
h
T
5
5
1
5
C
e
g
n
a
p
m
e
e
m
A
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Electrical Data
Issue B · 03.02
A subsidiary of
TT electronics plc
Welwyn Components
164
Dimensions (mm) & Weight (g)
PCB
Min.
bend
radius
mounting
centres
Type
L max
D max
f min
d nom
Wt. nom
FM
1
/
4
6.2
2.3
2.5
21.0
0.6
10.2
0.6
0.3
FM
1
/
2
9.0
3.4
19.6
0.8
12.7
1.2
0.6
FM1
12.5
4.2
17.8
0.8
18.4
1.2
0.9
Physical Data
L
D
f
d
Construction
The metal film is deposited on a high purity ceramic rod. End
caps are force fitted and termination wires welded to the
caps. The resistive film is adjusted to the required value by a
special helical cut; finally the cement protection is applied to
the resistor body and marked with indelible ink.
Terminations
Material
Solder-coated copper wire.
Strength
The terminations meet the requirements of
IEC 68.2.21.
Solderability
The terminations meet the requirements of
IEC 115-1, Clause 4.17.3.2.
Marking
Resistors are colour coded with five bands. Four of the bands
are used to indicate value and tolerance, with IEC 62 colours
being used. A fifth yellow band denotes constant voltage
fusibility.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuits.
Flammability
The resistors will not burn or emit incandescent particles
under any condition of applied temperature or power
overload.
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