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RA25X138AN27010%2SUP.C. [VISHAY]

RES,PANEL MOUNT,TAN/NICR,270 OHMS,10% +/-TOL,75PPM TC;
RA25X138AN27010%2SUP.C.
型号： RA25X138AN27010%2SUP.C.
厂家： VISHAY    VISHAY
描述：

RES,PANEL MOUNT,TAN/NICR,270 OHMS,10% +/-TOL,75PPM TC

电阻器
文件： 总3页 (文件大小：70K)
中文：  中文翻译
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RA  
Vishay Sfernice  
Adjustable Wirewound Enamelled Resistors  
FEATURES  
• 21 Watt to 180 Watt at 25°C  
• NF C 93-214  
- RBA 13 x 70  
- RBA 20 x 117  
- RBA 25 x 168  
”B” Ring  
The ceramic tubular core ensures high dissipation capacity and excellent resistance to thermal shock and overload. The resistor  
winding is evenly coiled on the core and protected by an enamel coating. A longitudinal opening provides for one or more  
electrical connections by means of sliding collars equipped with a tongued connector.  
DIMENSIONS in millimeters  
DIMENSIONS in millimeters  
16 x 94 20 x 117 25 x 138  
13 x 70  
25 x 168 30 x 250  
AN-B-CS AN-B-CS  
RA MODEL  
WELDED STAINLESS STEEL 304 L BAND “B”  
Connection  
AN-B  
94  
AN-B  
117  
23  
AN-B-CS  
138  
AN-B*  
A
2
70  
168  
28  
250  
33  
Ø B max.  
Ø C min.  
D
19.5  
9
28  
16  
A
K
Ø4.2  
5
9
12  
12  
17  
F
4
5
°
17.5 0.5 21 0.7 23.5  
1
16 0.5  
23.5  
1
26  
1
+ 0.5  
E
F
8
12  
–
8
14  
–
8
15  
7
10.5  
–
8
15  
8
+ 0  
D
O
+ 0.5  
18  
30  
30  
+ 0  
H
1
27  
27  
J max  
K max  
23  
29.5  
–
25  
31.5  
–
27.5  
34  
19.5  
24  
27.5  
34  
ØC  
ØB  
E
36.5  
317  
- 0  
L
199  
–
229  
- 4  
M
N
O max  
78  
2
98  
2
117  
2
56  
2
147  
2
227 2.5  
287  
WELDED STAINLESS STEEL 304 L COLLAR “AN” TYPE 1  
- 0  
–
28  
–
–
33  
–
169  
38.5  
50  
–
199  
38.5  
50  
- 4  
24.5  
43.5  
60  
M
P
Q
R
S
T
U
V
X
1.5  
0.5  
–
–
ØS  
–
–
24  
24  
25  
ØC  
26.5 0.5 31 0.7 33.5  
1
1
24 0.5  
4.2  
33.5  
1
1
36  
5.7  
1
R
V
4.2  
6.35  
–
4.2  
6.35  
–
5.7  
9
5.7  
9
X
6.35  
–
13  
9
0.5  
6.5  
6.5  
ØB  
21 0.5 24 0.7 28.5  
20 0.5  
28.5  
33  
1
T
Z
38  
1
42  
1
51 1.5  
34.5  
3.5  
40  
1
51 1.5 55 1.5  
A
Z approx  
Average unit  
weight in g  
5
6
6
6
5
70  
116  
200  
225  
415  
SCREWED STAINLESSSTEEL304 L “CS” TYPE 1  
*Also with CS and CR collars. See RW data sheet.  
A
P
H
ØB  
26  
Q
L
15  
N
U
Document Number: 50019  
Revision12-Jan-04  
www.vishay.com  
67  
For technical questions, contact sfer@vishay.com  
RA  
Adjustable Wirewound Enamelled Resistors  
Vishay Sfernice  
MECHANICAL SPECIFICATIONS  
ELECTRICAL SPECIFICATIONS  
Resistance Range  
Mechanical Protection  
Resistive Element  
Connections  
vitreous enamel  
33 to 22k  
(E6-E24 series)  
Ni-Cr wire  
B band  
AN or CS collar  
Tolerance  
Standard  
10%  
Average Unit Weight  
40 to 415g  
Power Rating  
21Wto180Wa2t 5°C  
Temperature Coefficient  
+ 75ppm/°C (typical)  
ENVIRONMENTAL SPECIFICATIONS  
Temperature Limits  
– 55°C + 350°C  
Climatic Category  
– 55°C/+ 200°C/56 days  
PERFORMANCE  
TESTS  
CONDITIONS  
REQUIREMENTS  
TYPICAL VALUES AND DRIFTS  
10Pr 5s  
Short Time Overload  
Climatic Sequence  
0.5%  
2% or 0.05  
Voltage < 6000V  
3% or 0.05  
Insulation resistance > 100M  
– 55°C  
+ 200°C  
1%  
5 cycles  
56 days  
95% R.H.  
Humidity  
(Steady State)  
2% or 0.05  
Insulation resistance > 100M  
0.5%  
Load at Pr  
Thermal Shock  
Resistor Strength  
Vibration  
0.5%  
0.25%  
0.5%  
2% or 0.05  
2% or 0.05  
1%* or 0.05  
1% or 0.05  
followed by exposure at – 55°C/15  
200N 10N  
55/10  
AN  
B
Traction 40Ncm  
Torque 60Ncm  
Terminals Strength  
0.25%  
1000 hours at Pr  
25°C  
Load Life  
1.5%  
5%  
90 /30  
*1% of total resistance and 2% between sliding collar and fixed connection.  
SPECIAL FEATURES  
RA STYLE  
16 x 94  
25 x 138  
30 x 250  
25 x 168  
13 x 70  
20 x 117  
Designation NF C 93-214  
–
–
–
RBA 13 x 70  
RBA 20 x 117  
RBA 25 x 168  
Power Rating  
NF C 93-214  
–
–
75W  
–
13W  
21W  
25W  
50W  
50W  
at 25°C  
Maximum Power  
Rating at 25°C  
35W  
3.9k  
180W  
120W  
Ohmic Range  
68  
150 6.8k  
330 22k  
33  
3.9k  
100  
4.7k  
220  
10k  
(E6, E24 series)  
ADMISSIBLE RATED AMPERAGE  
This must in all cases be less than:  
In =  
Pr (W)  
Rn ( )  
√
SLIDING COLLAR  
Resistors are normally supplied with 1 sliding collar fitted and locked in a specific position.  
Additional collars can be supplied and adjusted at the factory to special order (on request).*  
*Quote ohmic value and tolerance of each resistance section, and Rn value.  
MAXIMUM ADDITIONAL COLLARS  
RA  
RA  
RA  
RA  
RA  
MODEL  
RA  
13 x 70  
16 x 94  
20 x 117  
25 x 138  
25 x 168  
AND TYPE  
30 x 250  
Additional  
sliding collar  
4
1
1
1
2
3
www.vishay.com  
68  
Document Number: 50019  
Revision 12-Jan-04  
For technical questions, contact sfer@vishay.com  
RA  
Adjustable Wirewound Enamelled Resistors  
Vishay Sfernice  
POWER RATING CHART  
TEMPERATURE RISE  
MARKING  
100  
75  
50  
25  
0
0
50  
100  
150  
200  
250  
300  
350  
AMBIENT TEMPERATURE IN DEGREES CELSIUS  
400  
300  
200  
100  
0
10  
100  
1000  
RATED POWER IN WATTS  
SFERNICE trademark, model, style, NF style (if applicable) ohmic value (in ), tolerance (in %), manufacturing date.  
ORDERING INFORMATION  
AN  
RA  
6.8k  
10%  
4 SUP. C.  
20 x 117  
TOLERANCE  
MODEL  
ADDITIONAL  
SLIDING  
SPECIAL  
DESIGN  
CONNECTIONS  
OHMIC  
VALUE  
STYLE  
COLLAR  
In option  
Custom items are subject  
to extra-charge and min. order.  
Please see price list.  
Document Number: 50019  
Revision12-Jan-04  
www.vishay.com  
69  
For technical questions, contact sfer@vishay.com  

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