RWM Datasheet, PDF (2/4 Pages) Vishay Siliconix – Enamelled Wirewound Power Resistors Axial Leads

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RWM
Vishay Sfernice
TECHNICAL SPECIFICATIONS
VISHAY SFERNICE SERIES RWM RWM
AND STYLE
4 x 10 4 x 22
at + 70 °C 2.6 W 4.5 W
at + 25 °C
3W
5W
Power Rating _{With Surface}
Temp.
5.5 W 7 W
 + 450 °C
Ohmic Range in Relation to
Tolerance ± 5 % E24 Series
0.1  0.1 
10 k 16 k
Qualified Ohmic Range
NF C 83-210
0.1  0.1 
10 k 6.8 k
Limiting Element Voltage
120 V 300 V
Critical Resistance
4.8 k
-
RWM
5 x 26
6W
7W
RWM
6 x 22
6W
7W
10 W 10 W
0.1  0.1 
27 k 39 k
0.15  0.15 
10 k 39 k
350 V 350 V
18.8 k 17.5 k
RWM
8 x 26
7W
8W
10 W
0.1 
27 k
-
500 V
-
RWM
6 x 34
7W
8W
12 W
0.33 
36 k
0.33 
15 k
500 V
31 k
RWM
8 x 34
9.5 W
11 W
14 W
0.33 
36 k
-
650 V
-
RWM
8 x 45
9.5 W
11 W
RWM
10 x 45
21 W
25 W
RWM
10 x 64
21 W
25 W
RWM
10 x 65
25.8 W
30 W
20 W 25 W 25 W 30 W
0.47 
62 k
0.47 
33 k
650 V
38 k
0.47  0.68  0.68 
62 k 100 k 100 k
-
-
-
800 V 800 V 800 V
25.6 k 25.6 k 21.3 k
PERFORMANCE
CECC 40201 - EN 140-201
TESTS
Short Time Overload
Temperature Cycling
(5 cycles)
Humidity (Steady State)
Terminal Strength
Load Life
CONDITIONS
10 P_r during 10 s
25 °C ambient
- 55 °C + 200 °C
56 days
40 °C ambient - R.H. 95 %
Tensile test: 20 N
2 successive bending
2 full rotations of 180°
1000 h at P_r
90’/30’ cycle
25 °C ambient
OVERLOAD
Heavy overloads can be endured in the form of short pulses
< 0.1 s. Particular requirements should be submitted to
Vishay Sfernice, specifying peak voltage, cycle and
environmental conditions.
RECOMMENDATIONS FOR USE
Since these components are high dissipation power
resistors, customers are advised to use a high melting point
solder.
For low ohmic values, the measurement becomes critical
and the connecting wires resistance is to be included. The
value is measured at 5 mm from the resistor body.
REQUIREMENTS
± (2 % + 0.1 )
± (1 % + 0.05 )
± (5 % + 0.1 )
± (1 % + 0.05 )
TYPICAL DRIFTS
± (0.5 % + 0.05 )
± (0.5 % + 0.05 )
± (0.5 % + 0.05 )
± (0.1 % + 0.05 )
± (5 % + 0.1 )
± (1.5 % + 0.05 )
Group Mounting
In a still atmosphere, a distance between axes equal to five
times the resistor’s diameter is recommended.
Cabinet Mounting
• Unventilated box: Dissipation should be reduced (see
dimensional drawing).
• Forced ventilation: If conditions are appropriate,
dissipation may be doubled or even trebled.
• In any case: The surface temperature at the hottest point
should not exceed 450 °C.
These aspects should be considered by the end user.
ELECTRICAL SPECIFICATIONS
Tolerance
Temperature Coefficient
Dielectric Withstanding Voltage NF EN140000
Inductance
Standard
On request
± 5 % (NI ± 10 %)
± 1 % and ± 2 % (NI ± 5 %)
+ 75 ppm/°C typical
500 V_RMS - 1 min - 10 mA
Non inductive (Ayrton-Perry) winding available
Revison: 15-Apr-14
2
Document Number: 50008
For technical questions, contact: [e-mail]
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ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000