Datasheet
Document Number: 28714 For technical questions, contact: melf@vishay.com
www.vishay.com
Revision: 05-Mar-12 49
MMU 0102, MMA 0204, MMB 0207 - Precision
Precision MELF Resistors
Vishay Beyschlag
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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 Example
The 12NC of a MMA 0204 resistor, value 47 k and TCR 25
with ± 0.1 % tolerance, supplied in blister tape of 3000 units
per reel was: 2312 156 74703.
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....