Aluminum Chassis Heat Sinkable Precision Resistors

(AH)

Introduction (AH)

Aluminum Housed Power Resistor - AH Series
Power Precision Heat Sinkable (AH)
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Outstanding Heatsink Aluminum Housed Wirewound Power Precision Resistors (AH).
Token Electronics aluminum chassis mount units are designed for maximum heat dissipation mounting solidly to metal chassis surface for maximum heat transfer. AH series are outstanding for their high power dissipation with precision tolerances in minimum physical sizes.

Lower hot spot ratings due to exclusive complete encapsulation of element within anodized aluminum body.
AH series high-performance welded construction throughout assures long stable load life with threaded heavy stud axial-terminals.

Materials :

  1. Encapsulant: S: Silicone, C: Cement;    End caps: Stainless steel.
  2. Core: Ceramic steatite or alumina.
  3. Housing: Aluminum with hard anodic coating.
  4. Element: Copper-nickel alloy, nickel-chrome alloy or manganese copper.
  5. Standard Terminals: 5~50 W Tinned terminals, 100~250 W Threaded terminals.

General Specification :

  1. Operating Temperature Range: -55°C to +275°C.
  2. Resistance Tolerance: ±10%, ±5%, ±1%, ±0.5%, ±0.25%, ±0.1%, ±0.05%
  3. Wattage Range: 6 styles to choose ranging from 5 to 250 watts.

Non-Inductive & Features :

  1. Ayrton Perry type non-inductive winding is available. When required add "N" to the part number.
  2. Standard winding & non-inductive winding avaiable. High power rating, strong construction, small size, and ultra precision.
  3. Aluminum housing allows chassis mounting and provides heat sink capability

The AH Series is RoHS compliant and lead free.
For non-standard technical requirements and custom special applications, please contact us to discuss the details.
Downloads Complete Specification in PDF Heat Sinkable Aluminum Chassis Power Precision Resistors (AH).

Heat Sinkable Dimensions (AH 5W ~ 50W)

Heat Sinkable Dimensions (AH 5W ~ 50W)
Heat Sinkable Dimensions (AH 5W ~ 50W)
Type Dimensions (Unit: 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 12.5 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 12.5 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

Note: The "N" for end of type name is Non-inductive winding.

Token's AH resistor wattage ratings are based on mounting to the following heat sink:

  1. AH-5W/10W: aluminum chassis area is 832 cm2 × 1.0 mm thick or equiv.
  2. AH-25W: aluminum chassis area is 1077 cm2 × 1.0 mm thick or equiv.
  3. AH-50W: aluminum chassis area is 1877 cm2 × 1.5 mm thick or equiv.
  4. AH-100W: aluminum chassis area is 1896 cm2 × 3.2 mm thick or equiv.
  5. AH-250W: aluminum chassis area is 5780 cm2 × 3.2 mm thick or equiv.

Heat Sinkable Dimensions (AH 100W)

Heat Sinkable Dimensions Dimensions (AH-100, AH-100N)
Heat Sinkable Dimensions Dimensions (AH-100, AH-100N)

Note: The "N" for end of type name is Non-inductive winding.


Heat Sinkable Dimensions (AH 250W)

Heat Sinkable Dimensions (AH-250, AH-250N)
Heat Sinkable Dimensions (AH-250, AH-250N)

Note: The "N" for end of type name is Non-inductive winding.

Silicone Filler Electrical Specification (AHS)

Type MIL Type 25°C Rated Power (W) Resistance Tolerance
(± %)
Resistance Range
(Ω)
Temperature Coefficient
(±PPM/°C)
Industry Military
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

Note: All values might be changed or modified, please consult factory for details.

Cement Filler Electrical Specification (AHC)

Type 25°C Rated Power (W) 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

Note: All values might be changed or modified, please consult factory for details.

Surface Temperature Versus Power Load (Mounted on heat-sink chassis) (AH)

(AH) Surface Temperature Versus Power Load
(AH) Surface Temperature Versus Power Load

Ambient Temperature Derating (AH)

(AH) Ambient Temperature Derating
(AH) Ambient Temperature Derating

Derating is required for ambient temperatures above 25°C, see the graph.
Curve Aluminum Chassis applies to all types when mounted to specified heat sink.
Curves A, B, C apply to operation of unmounted resistors.

  1. Curves A:
    AH 5 and 10 watt unites, unmounted.
  2. Curves B:
    AH 25 watt units, unmounted.
  3. Curves C:
    AH 50, 100 and 250 watt units, unmounted.

Reduced Heat Sink Derating (AH)

(AH) Reduced Heat Sink Derating
(AH) Reduced Heat Sink Derating

Derating is also required when recommended heat sink area is reduced.

  1. Curves A:
    AH-5 and AH-10 size resistor.
  2. Curves B:
    AH-25 size resistor.
  3. Curves C:
    AH-50, AH-100 and AH-250 size resistor.

Test Conditions (AH)

Parameters Test Conditions Specifications
Vibration 10~50~10Hz/Min -X- Y- Z Axis 2 Hours each. Δ R±(0.2%+0.05Ω)Max.
Load Life Load Rating (chassis mounted)
25°C (1.5 Hour on 0.5 Hour OFF) Repeat 1000 Hours
Δ R±(5%+0.05Ω)Max.
Terminal Strength (1) Pull Test (30 sec Min)
AH-5 1kg, AH-10 2.3kg, AH-25, AH-50 4.5kg
(2) Torque Test (5~15sec)
AH-100 27kg-cm, AH-250 36kg-cm
Δ R±(0.2%+0.05Ω)Max.
Dielectric Strength AHS-5 AHS-10 AHS-25 1000V
AHS-50 2000V
AHS-100 AHS-250 3000V
Δ R±(0.5%+0.05Ω)Max.
AHC-5 AHC-10 AHC-25 1000V
AHC-50 1500V
AHC-100 AHC-250 2500V
Insulation Resistance Under the same test condition of Dielectric Strength, Load DC500V and measure the Insulation R. 1000 MΩ Min.
Moisture Resistance Temp 40°C moisture 95% DC 100V 100Hr Δ R±(5%+0.05Ω)Max.
Short Time Over Load 5 × wattage rating-5sec. Δ R±(2%+0.05Ω)Max.

Order Codes (AH)

AH S 10 20Ω D
12345
Part Number
Encapsulant
S: Silicone
C: Cement
Rated Power (W)
10 10W
10N 10W
250 250W
250N 250W
N Non-Inductive
Resistance Value (Ω)
R51 0.51Ω
5R1 5.1Ω
51R 51Ω
510R 510Ω
5K1 5.1KΩ
Resistance Tolerance (%)
A5 ±0.05%
B ±0.10%
C ±0.25%
D ±0.5%
F ±1%
J ±5%
K ±10%