UMA0204 Datasheet, PDF (7/8 Pages) Vishay Siliconix – Ultra Precision MELF Resistor

Ultra Precision MELF Resistor
UMA 0204
Vishay Beyschlag
TEST PROCEDURES AND REQUIREMENTS - continued
EN
60 115-1
CLAUSE
IEC
60 068-2
TEST
METHOD
TEST
PROCEDURE
stability for product types:
REQUIREMENTS
PERMISSIBLE CHANGE (∆R/R)
STABILITY
CLASS 0.05
OR BETTER
STABILITY
CLASS 0.1
OR BETTER
STABILITY
CLASS 0.25
OR BETTER
4.22
6 (Fc) vibration
4.17.2 58 (Td) solderability
4.18.2
58 (Td)
resistance to
soldering heat
UMA 0204 100 Ω to 100 kΩ
endurance by sweeping;
43 Ω to 221 kΩ
22 Ω to 332 kΩ
10 to 2000 Hz; no resonance;
amplitude ≤1.5 mm or ≤ 200 m/s²;
6h
solder bath method; SnPb40;
± (0.01 %R + 1 mΩ)
good tinning (≥ 95 % covered); no visible damage
non-activated flux;
(215 ± 3) °C; (3 ± 0.3) s
solder bath method; SnAg3Cu0.5
good tinning (≥ 95 % covered); no visible damage
or SnAg3.5; non-activated flux;
(235 ± 3) °C; (2 ± 0.2) s
solder bath method;
(260 ± 5) °C; (10 ± 1) s
reflow method 2
(IR / forced gas convention)
(260 ± 5) °C; (10 ± 1) s
note 2
± (0.05 %R + 10 mΩ)
± (0.01 %R + 1 mΩ)
± (0.02 %R + 1 mΩ)
4.29
45 (XA) component solvent isopropyl alcohol; 50 °C;
resistance
method 2
no visible damage
4.30
45 (XA) solvent resistance isopropyl alcohol; 50 °C;
of marking
method 1, toothbrush
marking legible; no visible damage
4.32
21 (Ue₃) shear (adhesion) 45 N
4.33
21 (Ue₁) substrate bending depth 2 mm, 3 times
no visible damage
no visible damage, no open circuit in bent position
± (0.02 %R + 10 mΩ)
± (0.05 %R + 10 mΩ)
4.7
−
4.35
−
voltage proof
flammability
U_rms = U_ins; 60 s
IEC 60 695-2-2, needle flame test; 10 s
no flashover or breakdown
no burning after 30 s
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.
Document Number: 28715
Revision: 25-Feb-04
For technical questions contact: [e-mail]
www.vishay.com
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