NFR25, NFR25H
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Vishay BCcomponents
Revison: 06-Sep-16
8
Document Number: 28737
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TEST PROCEDURES AND REQUIREMENTS
IEC
60115-1
CLAUSE
IEC
60068-2
TEST
METHOD
TEST PROCEDURE
REQUIREMENTS
NFR25 NFR25H
4.4.1 Visual examination No holes; clean surface; no damage
4.4.2 Dimensions (outline) Gauge (mm) See Dimensions Table
4.5
Resistance
(refer note on first page
for measuring distance)
Applied voltage (+ 0 % / - 10 %):
R < 10 : 0.1 V
10 R < 100 : 0.3 V
100 R < 1 k: 1 V
1 kR < 10 k 3 V
10 kR 15 k: 10 V
R - R
nom.
: max. ± 5 %
4.18 20 (Tb)
Resistance to soldering
heat
Thermal shock: 10 s; 260 °C;
3 mm from body
R max.: ± (0.25 % R + 0.05 )
4.29 45 (Xa)
Component solvent
resistance
Isopropyl alcohol or H
2
O followed by
brushing
No visual damage
4.17 20 (Ta) Solderability
2 s; 235 °C:
Solder bath method; SnPb40
3 s; 245 °C:
Solder bath method; SnAg3Cu0.5
Good tinning (95 % covered); no damage
Solderability (after aging)
8 h steam or 16 h, 155 °C;
leads immersed 6 mm;
for 2 s at 235 °C: Solder bath (SnPb40)
for 3 s at 245 °C: Solder bath
(SnAg3Cu0.5) method
Good tinning (95 % covered); no damage
4.7
Voltage proof on
insulation
U
RMS
= 500 V during 1 min;
metal block method
No breakdown or flashover
4.16
Robustness of
terminations:
4.16.2 21 (Ua1) Tensile all samples Load 10 N; 10 s Number of failures < 10 x 10
-6
4.16.3 21 (Ub)
Bending half number
of samples
Load 5 N; 4 x 90° Number of failures < 10 x 10
-6
4.16.4 21 (Uc)
Torsion other half
of samples
3 x 360° in opposite directions
No damage
R max.: ± (0.25 % R + 0.05 )
4.20 29 (Eb) Bump 3 x 1500 bumps in 3 directions; 40 g
No damage
R max.: ± (0.25 % R + 0.05 )
4.22 6 (Fc) Vibration
Frequency 10 Hz to 500 Hz;
displacement 1.5 mm or acceleration
10 g; 3 directions; total 6 h (3 x 2 h)
No damage
R max.: ± (0.25 % R + 0.05 )
4.19 14 (Na)
Rapid change of
temperature
30 min at LCT and 30 min at UCT; 5 cycles
No visual damage
R max.: ± (0.25 % R + 0.05 )
4.23 Climatic sequence:
4.23.2 2 (Ba) Dry heat 16 h; 155 °C
4.23.3 30 (Db)
Damp heat (accelerated)
1
st
cycle
24 h; 55 °C; 90 % to 100 % RH
4.23.4 1 (Aa) Cold 2 h; -55 °C
4.23.5 13 (M) Low air pressure 2 h; 8.5 kPa; 15 °C to 35 °C
4.23.6 30 (Db)
Damp heat (accelerated)
remaining cycles
5 days; 55 °C; 95 % to 100 % RH
R
ins
min. 10
3
M
R max.: ± (1.5 % R + 0.1 )
4.24 78 (Cab) Damp heat (steady state)
56 days; 40 °C; 90 % to 95 % RH;
loaded with 0.01 P
70
(IEC steps: 0 V to 100 V)
R
ins
min. 10
3
M
R max.: ± (1 % R + 0.05 )
4.25.1 Endurance (at 70 °C)
1000 h; loaded with P
70
or U
max.
;
1.5 h ON and 0.5 h OFF
R max.: ± (1 % R + 0.05 )
4.25.3
Endurance at upper
category temperature
1000 h; no load R max.: ± (1 % R + 0.05 )
4.8 Temperature coefficient
Between -55 °C and +155 °C
0.22 R 4.7
4.7 < R 15
15 < R 15 k
± 200 ppm/K
± 200 ppm/K
± 100 ppm/K
± 200 ppm/K
± 100 ppm/K
± 100 ppm/K
4.12 Noise IEC 60195 < 0.1 μV/V
4.26 Accidental overload Cheese-cloth Non flammable
4.6.1.1 Insulation resistance
Maximum voltage U
max.
DC = 500 V
after 1 min; metal block method
R
ins
min. 10
4
M
