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參數(shù)資料
| 型號： | UMA0204 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Ultra Precision MELF Resistor |
| 中文描述： | 超精密晶圓電阻 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 109K |
| 代理商： | UMA0204 |
Document Number: 28715
Revision: 25-Feb-04
For technical questions contact: ff3bresistors@vishay.com
www.vishay.com
7
UMA 0204
Vishay Beyschlag
Ultra Precision MELF Resistor
Note
1.
The pulse load stability of professional MELF resistors applies also to ultra precision resistors. However, severe pulse loads are likely to
jeopardize ultra precision stability requirements.
2.
Wave soldering is not recommended.
TEST PROCEDURES AND REQUIREMENTS
- continued
EN
60115-1
CLAUSE
IEC
60068-2
TEST
METHOD
TEST
PROCEDURE
REQUIREMENTS
PERMISSIBLE CHANGE (
R
/
R
)
STABILITY
CLASS 0.05
OR BETTER
STABILITY
CLASS 0.1
OR BETTER
STABILITY
CLASS 0.25
OR BETTER
stability for product types:
UMA 0204
100
to 100 k
43
to 221 k
22
to 332 k
4.22
6 (Fc)
vibration
endurance by sweeping;
10 to 2000 Hz; no resonance;
amplitude
≤
1.5 mm or
≤
200 m/s
2
;
6 h
± (0.01 %
R
+ 1 m
)
4.17.2
58 (Td)
solderability
solder bath method; SnPb40;
non-activated flux;
(215 ±
3)
°
C; (3 ± 0.3) s
good tinning (
≥
95 % covered); no visible damage
solder bath method; SnAg3Cu0.5
or SnAg3.5; non-activated flux;
(235 ± 3)
°
C; (2 ± 0.2) s
good tinning (
≥
95 % covered); no visible damage
4.18.2
58 (Td)
resistance to
soldering heat
solder bath method;
(260 ± 5)
°
C; (10 ± 1) s
note 2
± (0.05 %
R
+ 10 m
)
reflow method 2
(IR / forced gas convention)
(260 ± 5)
°
C; (10 ± 1) s
± (0.01 %
R
+ 1 m
)
± (0.02 %
R
+ 1 m
)
4.29
45 (XA)
component solvent
resistance
isopropyl alcohol; 50
°
C;
method 2
no visible damage
4.30
45 (XA)
solvent resistance
of marking
isopropyl alcohol; 50
°
C;
method 1, toothbrush
marking legible; no visible damage
4.32
21 (Ue
3
)
shear (adhesion)
45 N
no visible damage
4.33
21 (Ue
1
)
substrate bending
depth 2 mm, 3 times
no visible damage, no open circuit in bent position
± (0.02 %
R
+ 10 m
)
± (0.05 %
R
+ 10 m
)
4.7
voltage proof
U
rms
=
U
ins
; 60 s
no flashover or breakdown
4.35
flammability
IEC 60 695-2-2,
needle flame test; 10 s
no burning after 30 s
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