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5 . 1
STANDARD PART NUMBE R CODING
5. 1 . 1
Fixed resistor coding
Fixed resistor part numbers are as follows.
F i xed resistors
symobl
2
Type of resistor
(in capital letters )
Type of resistor (third digit)
c
C omposition resistors
C arbon film resistors
D
F
Unflammable resistors
G
Oxide metal film
· resistors
H
Fusible resistors
M
Metal plate resistors
s
Metal glazed resistors
v
Precision metal film
resistors
w
Wire wound resistors
x
Metal film resistors
z
Special resistors
Shape of resistor (sixth digit)
-
Note:
indicates flame retardant resistor.
c
1
-c:J-
rDi
2
3
4
5
6
7
8
9
5-2
Rated wattage
�
©
®
0
I
Shape of resistor
(in figures)
Rated wattage
(fourth and fifth digits)
O
1 / 1 0 w
A
1 8
1 /8 w
1 /6 w
1 6
1 4
1 /4 w
1 2
1 /2 w
0 1
1 W
0 2
2 W
0 3
3 W
0 4
4 W
0 5
5 W
0 6
6 W
0 7
7 W
7 5
7 . 5 w
0 8
a w
1 0
1 0 W
5
1 5 w
1
1 6 w
A 6
2 0
20 W
3 0
30 W
D
F
G
-CJ-
-c:J-
-CJ-
rDi
R
e:
<2
R
.... ..
o
---
rCJi
!Bl type
Lug
!Al type
Lug
�
! C l type
Lug
Tolerance
(in capital
letters )
I
0
- [I]
0
I
Tolerance
(seventh digit)
± 1 %
F
± 2 %
G
5 %
J
±
± 1 0 %
K
± 2 0 %
M
Values
(eighth - tenth or eleventh digits)
examples:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R47
4R 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4. 7 U
4 70 . . . . . . . . . . . . . . . . 4 7 x 1 0 ° . . . . . . . . . . . . . . . . 4 7 n
. . . . . . . . . . . . . . . . 4 7 x 1 0 1 . . . . . . . . . . . . . . . . 470 n
4 7 1
4 72 . . . . . . . . . . . . . . . . 4 7 x 1 O !
473 . . . . . . . . . . . . . . . . 4 7 x 1 0 1 . . . . . . . . . . . . . . . . 4 7 kU
4 7 4 . . . . . . . . . . . . . . . . 4 7 x 1 0 � . . . . . . . . . . . . . . . . 470 kU
4 75 . . . . . . . . . . . . . . . . 4 7 x 1 0 ' . . . . . . . . . . . . . . . . 4 . 7
ORV resistance shown by four d igits:
4640 . . . . . . . . . . . . . . 464 x 1 0 11 . . . . . . . . . . . . . . 464 n
464 1 . . . . . . . . . . . . . . 464 x 1 0 1 . . . . . . . . . . . . . . 4 . 64 kn
4642 . . . . . . . . . . . . . . 464 x 1 o !
· -
---
s
H
M
-c:J-
R
t;:;l
R
u _ D
C hip
�
Assistant code
(in capital letters)
I
@
Values
Assistant code
(twelfth digit)
A
Small type
B
Small type
s
Small type
y
Lead taping
z
Lead taping
0 . 4 7 0
4. 7 kU
. .
. . . . . . . . . . . . . .
. .
. . . . . . . . . . . . 4 6 . 4 kn
w
x
v
CJ-
-CJ-
�
e_
�
-c:J-
I l l type
.... ..
R
---
R
�
�
--�-4
- � -
Mn
, .,. -_
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