MMU 0102, MMA 0204, MMB 0207 - Precision
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Vishay Beyschlag
Revision: 16-Sep-16
12
Document Number: 28714
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HISTORICAL 12NC INFORMATION
• The resistors had a 12-digit numeric code starting with
2312.
• The subsequent 4 digits indicated the resistor type,
specification and packaging; see the 12NC table.
• The remaining 4 digits indicated the resistance value:
- The first 3 digits indicated the resistance value.
- The last digit indicated the resistance decade in
accordance with the 12NC Indicating Resistance
Decade table.
Last Digit of 12NC Indicating Resistance Decade
Historical 12NC
The 12NC of a MMU 0102 resistor, value 47 k. and TCR 25
with ± 0.25 % tolerance, supplied in blister tape of 3000
units per reel is: 2312 166 64703.
RESISTANCE DECADE LAST DIGIT
10 to 99.9 9
100 to 999 1
1 k to 9.99 k 2
10 k to 99.9 k 3
100 k to 999 k 4
1 M to 9.99 M 5
HISTORICAL 12NC - Resistor type and packaging
DESCRIPTION
2312 ... .....
BLISTER TAPE ON REEL BULK CASE
TYPE TCR TOL.
B1
1000
UNITS
BL
3000
UNITS
B0
10 000
UNITS
M8
8000
UNITS
MMU 0102
± 25 ppm/K
± 0.25 % 171 6.... 166 6.... 176 6.... 061 6....
± 0.1 % 171 7.... 166 7.... 176 7.... 061 7....
± 15 ppm/K
± 0.5 % 172 5.... 167 5.... 177 5.... 062 5....
± 0.25 % 172 6.... 167 6.... 177 6.... 062 6....
± 0.1 % 172 7.... 167 7.... 177 7.... 062 7....
TYPE TCR TOL.
B1
1000
UNITS
BL
3000
UNITS
B0
10 000
UNITS
M3
3000
UNITS
MMA 0204
± 25 ppm/K
± 0.25 % 141 6.... 156 6.... 146 6.... 041 6....
± 0.1 % 141 7.... 156 7.... 146 7.... 041 7....
± 15 ppm/K
± 0.5 % 142 5.... 157 5.... 147 5.... 042 5....
± 0.25 % 142 6.... 157 6.... 147 6.... 042 6....
± 0.1 % 142 7.... 157 7.... 147 7.... 042 7....
TYPE TCR TOL.
B1
1000
UNITS
B2
2000
UNITS
B7
7000
UNITS
MMB 0207
± 25 ppm/K
± 0.25 % 181 6.... 196 6.... 186 6....
± 0.1 % 181 7.... 196 7.... 186 7....
± 15 ppm/K ± 0.1 % 182 7.... 197 7.... 187 7....