Direct's new flat core winding technology allows for wirewound heatsinkable resistor affording a very low profile, and superior thermal transfer characteristics when compared to conventional aluminum housed wirewound resistor.
Close mounting of heat sensitive components is possible due to only a slight rise of the temperature on the aluminum profile. No heat sink compound is required because of large mounting surface.
Feature:
Complete welded construction.
Mounts on chassis to utilize heat-sink effect.
Meets applicable requirements of MIL-PRF-18546.
Molded construction for total environmental protection.
Excellent stability in operation (<1% change in resistance).
Available in non-inductive styles with Aryton-Perry winding for lowest reactive components.
General Specification:
Wattage Range: 6 styles to choose ranging from 5 to 250 watts.
Resistance Tolerance: 10%, 5%, 3%, 2%, 1%, 0.5%
Operating Temperature Range : -55% to +275°C
Aluminum Housed AH Resistors - Materials
Encapsulant: S: Silicone, C: Cement. End caps: Stainless steel Core: Ceramic steatite or alumina
Housing: Aluminum with hard anodic coating Element: Copper-nickel alloy, nickel-chrome alloy or manganese copper Standard Terminals: 5~50W Tinned terminals , 100~250W Threaded terminals.
AH 5W~50W Dimensions (Unit: mm)
Type
Dimensions(mm)
A
B
C
D
E
F
G
H
J
K
L
M
N
P
± 1.0
± 1.0
± 1.0
± 2.0
± 1.0
± 1.0
± 1.0
± 0.8
± 1.0
± 0.8
± 0.5
± 0.5
± 0.2
± 0.8
AH-5
11.2
125
15.2
28.6
8.5
16.4
8.1
1.7
3.8
2
2.4
1.5
1.3
6.7
AH-5N
11.2
125
15.2
28.6
8.5
16.4
8.1
1.7
3.8
2
2.4
1.5
1.3
6.7
AH-10
14.2
15.9
19
34.9
10.7
20.3
9.9
1.9
4.2
2.4
2.4
2
2.2
7.95
AH-10N
14.2
15.9
19
34.9
10.7
20.3
9.9
1.9
4.2
2.4
2.4
2
2.2
7.95
AH-25
18.2
19.8
27
49.2
14
27.4
13.9
1.9
5.9
4.4
3.2
1
2.2
11.1
AH-25N
18.2
19.8
27
49.2
14
27.4
13.9
1.9
5.9
4.4
3.2
1
2.2
11.1
AH-50
40
21.4
50
70.6
16
29
15.5
2.2
6.6
5
3.2
2
2.2
10.3
AH-50N
40
21.4
50
70.6
16
29
15.5
2.2
6.6
5
3.2
2
2.2
10.3
Notice: All values might be changed or modified, please consult factory for details.
AH-100, AH-100N Dimensions (Unit: mm)
Notice: All values might be changed or modified, please consult factory for details.
AH-250, AH-250N Dimensions (Unit: mm)
Notice: All values might be changed or modified, please consult factory for details.
AHS Type Wirewound Aluminum Housed - Electrical Specification
Type
MIL Type
25°C Rated Power (W)
Resistance Range (Ω)
Industry
Military
Resistance Tolerance (± %)
Resistance Range (Ω)
Temperature Coefficient (±PPM/°C)
AHS-5
RE60G
5
5
0.1, 0.25, 0.5
10~1K
25
0.5, 1
1.0~3.32K
25, 50
5, 10
0.1~3.32K
100, 250
10
0.01~3.32K
100, 250
AHS-5N
RE60N
5
5
1, 5
10~200
25, 50
5
1.0~860
100
5, 10
0.1~860
100, 250
10
0.01~1K
100, 250
AHS-10
RE65G
10
10
0.1, 0.25, 0.5
10~1.2K
25, 50
0.5, 1
1.0-2.7K
50, 100
5, 10
0.1~2.7K
100, 250
10
0.01~5.62K
100, 250
AHS-10N
RE65N
10
10
1, 5
10~860
25, 50
5
1.0~1.2K
100
5, 10
0.1~1.2K
100, 250
10
0.01~1.5K
100, 250
AHS-25
RE70G
25
20
0.1, 0.25, 0.5
10~2.7K
25, 50
0.5, 1
1.0~3.9K
50, 100
5, 10
0.1~3.9K
100, 250
10
0.01~12.1K
100, 250
AHS-25N
RE70N
25
20
1, 5
10~1.2K
25, 50
5
1.0~2.7K
100
5, 10
0.1~2.7K
100, 250
10
0.01~6.04K
100, 250
AHS-50
RE75G
50
30
0.1, 0.25, 0.5
10~3.9K
25, 50
0.5, 1
1.0~5.6K
50, 100
5, 10
0.1~5.6K
100, 250
10
0. 01~39.2K
100, 250
AHS-50N
RE75N
50
30
1, 5
10~2.7K
25, 50
5
1.0~3.9K
100
5, 10
0.1~3.9K
100, 250
10
0.01~19.6K
100, 250
AHS-100
RE77G
100
75
0.1, 0.25, 0.5
10~5.6K
25, 50
0.5, 1
1.0~8.2K
50, 100
5, 10
0.1~12K
100, 250
10
0.01~29.4K
100, 250
AHS-100N
RE77N
100
75
1,5
10~3.9K
25, 50
5
1.0~5.6K
100
5, 10
0.1~5.6K
100, 250
10
0.01~14.7K
100, 250
AHS-250
RE80G
250
120
0.1, 0.25, 0.5
10~12K
25, 50
0.5, 1
1.0~27K
50, 100
5, 10
0.1~27K
100, 250
10
0.01~35.7K
100, 250
AHS-250N
RE80N
250
120
1, 5
10~5.6K
25, 50
5
1.0~8.2K
100
5, 10
0.1~8.2K
100, 250
10
0.01~17.4K
100, 250
Notice: All dimensions might be changed or modified, please refer to last updating specification.
AHC Type Wirewound Aluminum Housed - Electrical Specification
Type
25°C Rated Power (W)
Resistance Range (Ω)
Resistance Tolerance (± %)
Resistance Range (Ω)
Temperature Coefficient (±PPM/°C)
AHC-5
5
0.1, 0.25, 0.5
10~1K
25
0.5, 1
1.0~3.32K
25, 50
5, 10
0.1~3.32K
100, 250
10
0.01~3.32K
100, 250
AHC-5N
5
1, 5
10~200
25, 50
5
1.0~860
100
5, 10
0.1~860
100, 250
10
0.01~1K
100, 250
AHC-10
10
0.1, 0.25, 0.5
10~1.2K
25, 50
0.5, 1
1.0-2.7K
50, 100
5, 10
0.1~2.7K
100, 250
10
0.01~5.62K
100, 250
AHC-10N
10
1, 5
10~860
25, 50
5
1.0~1.2K
100
5, 10
0.1~1.2K
100, 250
10
0.01~1.5K
100, 250
AHC-25
25
0.1, 0.25, 0.5
10~2.7K
25, 50
0.5, 1
1.0~3.9K
50, 100
5, 10
0.1~3.9K
100, 250
10
0.01~12.1K
100, 250
AHC-25N
25
1, 5
10~1.2K
25, 50
5
1.0~2.7K
100
5,10
0.1~2.7K
100, 250
10
0.01~6.04K
100, 250
AHC-50
50
0.1, 0.25, 0.5
10~3.9K
25, 50
0.5, 1
1.0~5.6K
50, 100
5, 10
0.1~5.6K
100, 250
10
0. 01~39.2K
100, 250
AHC-50N
50
1, 5
10~2.7K
25, 50
5
1.0~3.9K
100
5, 10
0.1~3.9K
100, 250
10
0.01~19.6K
100, 250
AHC-100
100
0.1, 0.25, 0.5
10~5.6K
25, 50
0.5, 1
1.0~8.2K
50, 100
5, 10
0.1~12K
100, 250
10
0.01~29.4K
100, 250
AHC-100N
100
1, 5
10~3.9K
25, 50
5
1.0~5.6K
100
5, 10
0.1~5.6K
100, 250
10
0.01~14.7K
100, 250
AHC-250
250
0.1, 0.25, 0.5
10~12K
25, 50
0.5, 1
1.0~27K
50, 100
5, 10
0.1~27K
100, 250
10
0.01~35.7K
100, 250
AHC-250N
250
1, 5
10~5.6K
25, 50
5
1.0~8.2K
100
5, 10
0.1~8.2K
100, 250
10
0.01~17.4K
100, 250
Notice: All dimensions might be changed or modified, please refer to last updating specification.
Surface Temperature Versus Power Load (on Chassis)
Derating is required to reduce chassis ounting area and for high ambient temperatures.
Curves: A=5 & 10 watt unites, unmounted.B=25 watt units, unmounted.C=50,100 & 250 watt units, unmounted.
Heat Sink Derating
REDUCED HEAT SINK DERATING: Derating is also required when recommended heat sink
area is reduced.
A = AH-5 and AH-10 size resistor.
B = AH-25 size resistor
C = AH-50, AH-100 and AH-250 size resistor
Complete welded construction.
