2001 Jan 17
4
BCcomponents
Product specification
Standard metal film resistors
SFR16S/25/25H
5033E/5043E/5053H
Composition of the clear text code (NAFTA P/N)
• The resistors have an ordering code starting with 50
• The subsequent digits indicate the resistor type,
temperature coefficient, ohmic value, tolerance and
packaging; see Table 1
• The ohmic value is represented by 5 digits; see Table 2
• For temperature coefficient and tolerance, see Table 3.
Table 2
Examples of the ohmic value
Table 3
Letter coding for temperature coefficient and
tolerance
ORDERING EXAMPLE: CLEAR TEXT CODE
The ordering code of a SFR25 resistor, value 5600
Ω±1%,
taped on a bandolier of 5000 units in tape on reel is:
5043ED5K600F12AF5.
OHMIC
VALUE
5 DIGIT
VALUE
1
Ω
1R000
10
Ω
10R00
100
Ω
100R0
1k
Ω
1K000
10 k
Ω
10K00
100 k
Ω
100K0
1M
Ω
1M000
TC
(
×10−6/K)
LETTER
CODE
TOL.
(%)
LETTER
CODE
200
M
±5J
100
D
±1F
Composition of the 12NC
• The resistors have a 12-digit ordering code
starting with 23
• The subsequent 7 digits indicate the resistor type and
packaging; see Table 1.
• The remaining digits indicate the resistance value:
– The first 2 or 3 digits indicate the resistance value.
– The last digit indicates the resistance decade in
accordance with Tables 4 or 5.
Table 4
Last digit for
±5% tolerance
Table 5
Last digit for
±1% tolerance
ORDERING EXAMPLE: 12NC
The ordering code of a SFR25 resistor, value 5600
Ω±5%,
taped on a bandolier of 5000 units in ammopack is:
2322 181 43562.
RESISTANCE DECADE
LAST DIGIT
0.10 to 0.91
Ω
7
1to9.1
Ω
8
10 to 91
Ω
9
100 to 910
Ω
1
1to9.1 k
Ω
2
10 to 91 k
Ω
3
100 to 910 k
Ω
4
1to9.1 M
Ω
5
≥10 MΩ
6
RESISTANCE DECADE
LAST DIGIT
0.10 to 0.976
Ω
7
1to9.76
Ω
8
10 to 97.6
Ω
9
100 to 976
Ω
1
1to9.76 k
Ω
2
10 to 97.6 k
Ω
3
100 to 976 k
Ω
4
1to9.76 M
Ω
5
≥10 MΩ
6