UAL Series

UAL Series
Aluminum Housed Power Wirewound Resistors
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Power Rating 5 to 300Watts
High Temperature: -55°C to +275°C
Excellent Pulse Handling
Resistances from 0.005 to 250kOhms
Tolerance to ±0.01%
Low TCR: ± 20ppm/K Standard
Various Terminal Option Available
All Welded Construction
UAL-25-4T
UAL-25-4
UAL-25-4TR
SPECIFICATIONS
MIL-R-39009
MIL-R-18546
Style
Commercial
MIL
Free Air
UAL-5
RER-60 / RE-60
7.5 a
5a
4.5
0.01 to 22K
UAL-10
RER-65 / RE-65
10 a
10 a
7.5
0.005 to 10K
UAL-25
RER-70 / RE-70
25 b
20 b
12
0.005 to 36K
UAL-50
RER-75 / RE-75
50 c
30 c
20
0.01 to 86K
100 d
75 d
40
0.01 to 70K
Type
Power Rating ( W @ 25°C )
UAL-100
Resistance
Range1
UAL-180
-
180 d
-
-
0.01 to 50K
UAL-250
RER-80 / RE-80
250 d
120 d
100
0.01 to 50K
UAL-300
-
300 e
-
75
0.01 to 68K
1
a
b
c
d
e
For non-inductive windings, divide maximum resistance by 2
Heatsink Required : 0.040 [1.0] Alum. Plate, 129 in2 [832 cm2] or equiv.
Heatsink Required : 0.040 [1.0] Alum. Plate, 167 in2 [1077 cm2] or equiv.
Heatsink Required : 0.059 [1.5] Alum. Plate, 291 in2 [1877 cm2] or equiv.
Heatsink Required : 0.125 [3.2] Alum. Plate, 294 in2 [1896 cm2] or equiv.
Heatsink Required : 0.125 [3.2] Alum. Plate, 895 in2 [5780 cm2] or equiv.
Ordering Information
For Non-Inductive Windings / insert the letter “N” ( i.e. UALN-25 )
Part Description: Part Type - Resistance - Tolerance - TCR ( If not standard )
Example: UAL-25 10 Ohm 1%
Riedon Inc.
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
08/15
UAL Series
Aluminum Housed Power Wirewound Resistors
SPECIFICATIONS (continued)
Specification
Value
Tolerances
±0.01% to ±10% ( 1% Standard )
Temperature Coefficient
>10Ω : ±20ppm/K
1Ω to10Ω : ±50ppm/K
<1Ω : Call Factory
Temperature Range
-55°C to +275°C
Dielectric Strength
UAL-5,10: 1500 VAC ; UAL-25: 2500 VAC ; UAL-50: 3500VAC ; Others: 5500VAC
Constuction
Centerless ground ceramic core
Tinned copper or copperweld leads
High-temperature epoxy molding Compound
Anodized aluminum housing
All welded terminations
Environmental Performance
(MIL-STD 202)
∆R
Dielectric
±0.2% + 0.05Ω
Load Life
±1% + 0.05Ω
Storage
±0.2% + 0.05Ω
Moisture Resistance
±0.2% + 0.05Ω
Thermal Shock
±0.2% + 0.05Ω
5X Overload ( 5s )
±0.2% + 0.05Ω
Shock
±0.1% + 0.05Ω
Vibration
±0.1% + 0.05Ω
Optional Lead Configuation
Wire, Flexible, Teflon, Quick Disconnect, Flying Leads, Formed
*Call factory for quote
Power Derating Curve
120
100
Mo
un
ted
Power ( % )
80
on
H
A
60
ea
Free-air Derating
A : UAL-5, UAL-10
B : UAL-25
C : UAL-50, UAL-100, UAL-250
D : UAL-300
tsi
nk
B
C
40
D
20
0
0
50
100
150
200
250
300
350
Ambient Temperature (°C)
Riedon Inc.
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
08/15
UAL Series
Aluminum Housed Power Wirewound Resistors
Dimensions
A
B
C
D
E
F
G
H
J
K
L
M
N
O
P
Q
R
±0.005
[±0.13]
±0.005
[±0.13]
±0.031
[±0.8]
±0.062
[±1.6]
±0.015
[±0.4]
±0.015
[±0.4]
±0.015
[±0.4]
±0.010
[±0.25]
±0.010
[±0.25]
±0.010
[±0.25]
±0.005
[±0.13]
±0.015
[±0.4]
±0.006
[±0.15]
±0.062
[±1.6]
±0.031
[±0.8]
±0.002
[±0.05]
±0.031
[±0.8]
UAL-5
0.444
[11.3]
0.490
[12.4]
0.600
[15.2]
1.125
[28.5]
0.334
[8.5]
0.646
[16.4]
0.320
[8.1]
0.065
[1.7]
0.140
[3.6]
0.078
[2.0]
0.093
[2.4]
0.078
[2.0]
0.050
[1.3]
0.266
[6.8]
0.245
[6.2]
0.051
[1.30]
0.085
[2.2]
UAL-10
0.562
[14.3]
0.625
[15.9]
0.750
[19.1]
1.320
[33.5]
0.430
[10.9]
0.800
[20.3]
0.400
[10.2]
0.075
[1.9]
0.190
[4.8]
0.093
[2.4]
0.093
[2.4]
0.102
[2.6]
0.080
[2.0]
0.312
[7.9]
0.312
[7.9]
0.098
[2.49]
0.160
[4.0]
UAL-25
0.719
[18.3]
0.781
[19.8]
1.062
[27.0]
1.870
[47.5]
0.530
[13.5]
1.080
[27.4]
0.560
[14.2]
0.085
[2.2]
0.260
[6.6]
0.172
[4.4]
0.125
[3.2]
0.125
[3.2]
0.080
[2.0]
0.438
[11.1]
0.391
[9.9]
0.098
[2.49]
0.185
[4.7]
UAL-50
1.563
[39.7]
0.844
[21.4]
1.968
[50.0]
2.720
[70.0]
0.615
[15.6]
1.140
[29.0]
0.615
[15.6]
0.085
[2.2]
0.300
[7.6]
0.196
[5.0]
0.125
[3.2]
0.125
[3.2]
0.080
[2.0]
0.438
[11.1]
0.422
[10.7]
0.098
[2.49]
0.185
[4.7]
Type
Riedon Inc.
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
08/15
UAL Series
Aluminum Housed Power Wirewound Resistors
Dimensions (continued)
Type
A
Aa
B
C
D
E
F
G
H
J
K
L
M
±0.005
[±0.13]
±0.005
[±0.13]
±0.005
[±0.13]
±0.031
[±0.8]
±0.062
[±1.6]
±0.015
[±0.4]
±0.015
[±0.4]
±0.015
[±0.4]
±0.010
[±0.25]
±0.015
[±0.4]
±0.015
[±0.4]
±0.005
[±0.13]
±0.015
[±0.4]
UAL-100
1.870
[47.5]
-
3.464
[88.0]
0.949
[24.1]
1.075
[27.3]
2.567
[65.2]
1.378
[35.0]
1.457
[37.0]
0.465
[11.8]
0.606
[15.4]
0.146
[3.7]
0.173
[4.4]
-
12-24
-
(2) #8
UAL-180
2.750
[69.9]
-
2.500
[63.5]
3.500
[88.9]
5.480
[139]
2.125
[54]
3.000
[76.2]
2.190
[55.6]
0.250
[6.4]
0.950
[24.1]
0.375
[9.5]
0.188
[4.8]
0.200
[5.1]
12-24
-
(2) #8
UAL-250
3.875
[98.4]
3.000
[76.2]
2.500
[63.5]
4.500
[114]
7.000
[178]
2.125
[54]
3.00
[76.2]
2.190
[55.6]
0.250
[6.4]
1.000
[25.4]
0.312
[7.9]
0.188
[4.8]
0.200
[5.1]
1/4-20
1.188
[30.7]
(4) #8
Type
UAL-300
Riedon Inc.
N
P
±0.015
[±0.4]
A
B
C
D
E
F
G
K
MAX
MAX
MAX
±0.010
[±0.3]
J
MAX
±0.010
[±0.3]
H
MAX
MAX
MAX
MAX
±0.010
[±0.3]
MAX
±0.010
[±0.3]
2.854
[72.5]
7.260
[184.4]
1.646
[41.8]
1.791
[45.5]
5.028
[127.7]
4.094
[104.0]
2.323
[59.0]
0.807
[20.5]
0.488
[12.4]
0.217
[5.5]
0.260
[6.6]
5.567
[141.4]
2.047
[52.0]
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
L
Mtg.
Screw
M
N
(626) 284-1704
08/15