MMU 0102, MMA 0204, MMB 0207 - Precision
Precision MELF Resistors
Vishay Beyschlag
TEST PROCEDURES AND REQUIREMENTS
EN
IEC
60115-1 60068-2 (4)
REQUIREMENTS
PERMISSIBLE CHANGE (R)
TEST
PROCEDURE
CLAUSE
TEST
METHOD
STABILITY
CLASS 0.05
OR BETTER
STABILITY
CLASS 0.1
OR BETTER
STABILITY
CLASS 0.25
OR BETTER
Stability for product types:
MMU 0102
MMA 0204
100
100
100
to 100 k
to 100 k
to 270 k
43
43
43
to 147 k
to 221 k
to 510 k
22
10
to 332 k
to 511 k
MMB 0207
15 to 1 M
U = 15 x P70 x R
Periodic electric
overload;
2 x Umax.
;
(1)
4.37
4.22
-
(0.5 %
R
R
+ 5 m
)
)
standard
operation mode
0.1 s on; 2.5 s off;
1000 cycles
Endurance by sweeping;
10 Hz to 2000 Hz;
no resonance; amplitude
1.5 mm or 200 m/s2; 7.5 h
6 (Fc)
Vibration
(0.01 %
R
+ 5 m
)
(0.02 %
+ 5 m
(0.03 %
R
+ 5 m)
IEC 61340-3-1 (4)
;
Electrostatic
discharge
(Human Body
Model)
3 pos. + 3 neg. discharges
MMU 0102: 1.5 kV
MMA 0204: 2 kV
(1)
4.40
-
(0.5 % R + 50 m)
MMB 0207: 4 kV
Solder bath method;
SnPb40; non-activated flux;
(215 3) C; (3 0.3) s
Good tinning (
Good tinning (
95 % covered); no visible damage
95 % covered); no visible damage
4.17.2
58 (Td)
Solderability
Solder bath method;
SnAg3Cu0.5 or SnAg3.5;
non-activated flux;
(235 3) C; (2 0.2) s
Solder bath method;
(260 5) C; (10 1) s
Note (2)
(0.05 %
R
+ 10 m
)
Resistance to
soldering heat
4.18.2
58 (Td)
Reflow method 2
(IR/forced gas convection);
(260 5) C; (10 1) s
(0.01 %
R
+ 5 m
)
(0.025 %
R
+ 5 m
)
Component
solvent
resistance
Isopropyl alcohol; 50 C;
No visible damage
4.29
4.30
45 (XA)
45 (XA)
method 2
Solvent
resistance of
marking
Isopropyl alcohol; 50 C;
method 1, toothbrush
Marking legible; no visible damage
No visible damage
4.32
4.33
21 (Ue3)
21 (Ue1)
Shear (adhesion)
45 N
No visible damage, no open circuit in bent position
Substrate
bending
Depth 2 mm, 3 times
URMS = Uins; 60 s
(3)
(3)
(0.02 %
R
+ 10 m)
(0.05 % R + 10 m)
4.7
-
-
Voltage proof
Flammability
No flashover or breakdown
IEC 60 695-11-5 (4)
needle flame test; 10 s
,
4.35
No burning after 30 s
Notes
(1) The pulse load stability of professional MELF resistors applies for precision resistors also. However, severe pulse loads are likely to jeopardize
precision stability requirements.
(2) Wave soldering is not recommended.
(3) Special requirements apply to MICRO-MELF, MMU 0102:
- R < 100 (0.15 % R + 10 m).
- 100
R 10 k 0.1 % R.
- R > 10 k: 0.05 %
R
.
(4)
The quoted IEC standards are also released as EN standards with the same number and identical contents.
www.vishay.com
48
For technical questions, contact: melf@vishay.com
This document is subject to change without notice.
Document Number: 28714
Revision: 05-Mar-12
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000