UB Series
Powertron
FEATURES
•
•
•
•
•
•
•
Resistances from 0.02 to 260kOhms
Power Rating 1 to 15 Watts
Resistance Tolerances to ± 0.01%
Low TCR: ± 20ppm/K Standard
MIL-R-26 / MIL-R-39007 Power Ratings
Temperature Range: -55°C to +250°C
Non-Inductive Windings Available
TABLE 1—SPECIFICATIONS
Tolerances
Temperature Coefficient
±0.01% to ±10% ( 1% Standard )
>10W : ±20ppm/K
1W to10W : ±50ppm/K
<1W : Call Factory
-55°C to +250°C
500 VAC : UB-1 / UB-2 / UB-3
1000 VAC : All Others
Centerless ground ceramic core
Tinned copper or copperweld leads
High temperature / trivalent / inorganic Silicone coating
All welded terminations
Temperature Range
Dielectric Strength
Constuction
Environmental Performance
(MIL-STD 202)
DR
±0.2% + 0.05W
to ±1% depending on size and Resistance Value
±0.2% + 0.05W
±0.2% + 0.05W
±0.2% + 0.05W
±0.2% + 0.05W
±0.1% + 0.05W
±0.1% + 0.05W
Dielectric
Load Life
Storage
Moisture Resistance
Thermal Shock
5X Overload ( 5s )
Shock
Vibration
ORDERING INFORMATION
Part Number - Resistance - Tolerance - TCR ( If not standard )
UB-3 10 Ohm 1%
For Non-Inductive Windings / insert the letter “N” ( i.e. UBN-5 )
Document No.: 64326
Revision: 23-05-2013
For technical questions,
contact
powertron@vishaypg.com
www.powertron.de
1
UB Series
Powertron
TABLE 1—SPECIFICATIONS (continued)
Dimensions
Type
Wattage Rating
( Watts )
Maximum
Ohms
2
A
±0.062”
[±1.6mm]
MIL-R-26 /
MIL-
R-39007
Style
RW-81
RWR-81
RWR-82
RW-80
RWR-80
B
±0.031”
[±0.8mm]
C
1
±0.002”
[±0.05mm]
0.020 [0.5]
0.025 [0.6]
0.020 [0.5]
0.025 [0.6]
0.025 [0.6]
0.020 [0.5]
0.032 [0.8]
0.032 [0.8]
0.032 [0.8]
0.040 [1.0]
0.040 [1.0]
0.040 [1.0]
0.040 [1.0]
Maximum
Working
Voltage
UB-1
UB-2
3
UB-3
UB-3C
UB-5
UB-5C
UB-6
UB-10
UB-12
UB-15
1
1
1.5
2
3
4
5
6
7
10
15
3.4k
7.5k
10k
12.5k
25k
32k
50k
95k
150k
260k
0.250 [6.4]
0.312 [7.9]
0.406 [10.3]
0.350 [8.9]
0.560 [14.2]
0.500 [12.7]
0.625 [15.9]
0.875 [22.2]
1.220 [31.0]
1.780 [45.2]
0.085 [2.2]
0.078 [2.0]
0.094 [2.4]
0.156 [4.0]
0.187 [4.7]
0.218 [5.5]
0.250 [6.4]
0.312 [7.9]
0.312 [7.9]
0.375 [9.5]
33
42
80
135
162
194
258
425
607
1050
RW-84
2
3
Lead Diameter: 18 AWG = 0.040” / 20 AWG = 0.032” / 22 AWG = 0.025” / 24 AWG = 0.020”
Where more than one lead is listed / the top value is Standard
For non-inductive windings / divide maximum resistance by 2
This part does not meet the RoHS directive - call factory for details
FIGURE 1—DERATING
120
100
Power (%)
80
60
40
20
0
0
25
50
100
150
200
250
Ambient Temperature (°C)
www.powertron.de
2
For technical questions,
contact
powertron@vishaypg.com
Document No.: 64326
Revision: 23-05-2013
Legal Disclaimer Notice
Vishay Precision Group
Disclaimer
ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their
behalf (collectively, “Vishay Precision Group”), disclaim any and all liability for any errors, inaccuracies or
incompleteness contained herein or in any other disclosure relating to any product.
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conditions of purchase, including but not limited to, the warranty expressed therein.
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and conditions of purchase.
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Group disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and
all liability, including without limitation special, consequential or incidental damages, and (iii) any and
all implied warranties, including warranties of fitness for particular purpose, non-infringement and
merchantability.
Information provided in datasheets and/or specifications may vary from actual results in different
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Document No.: 63999
Revision: 27-Apr-2011
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