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The information contained herein does not form part of a
contract and is subject to change without notice. ARCOL
operate a policy of continual product development, therefore,
specifications may change.
It is the responsibility of the customer to ensure that the
component selected from our range is suitable for the intended
application. If in doubt please ask ARCOL.
ARCOL UK Limited,
Threemilestone Ind. Estate,
Truro, Cornwall, TR4 9LG, UK.
T +44 (0) 1872 277431
F +44 (0) 1872 222002
E sales
@
arcolresistors.com
12/14.08
HS Aluminium Housed Resistors
Manufactured in line with the requirements of MIL 18546 and
IEC 115, designed for direct heatsink mounting with thermal
compound to achieve maximum performance.
• High Power to volume
• Wound to maximise High Pulse Capability
• Values from R005 to 100K
• Custom designs welcome
• RoHS Compliant
Characteristics
Tolerance (Code):
Tolerance for low Ω values:
Temperature coefficients:
Insulation resistance (Dry):
Power dissipation:
Ohmic values:
Low inductive (NHS):
NHS ohmic value:
NHS working volts:
Standard ±5% (J) and ±10% (K). Also available ±1% (F), ±2% (G) and ±3% (H)
Typically ≥ R05 ±5% ≤ R047 ±10%
Typical values < 1K 100ppm Std. > 1K 25ppm Std. For lower TCR’s please contact Arcol
10,000 MΩ minimum
At high ambient temperature dissipation derates linearly to zero at 200°C
From R005 to 100K depending on wattage size
Specify by adding N before HS Series code, e.g. NHS50
Divide standard HS maximum value by 4
Divide standard HS maximum working voltage by 1.414
Ordering Procedure
Standard Resistor. To specify standard: Series, Watts, Ohmic
Value, Tolerance Code, e.g.: HS25 2R2 J
Non Inductive Resistor. To specify add N, e.g.: NHS100 10R J
Heat Dissipation
Heat dissipation: Whilst the use of proprietary heat sinks
with lower thermal resistances is acceptable, uprating is not
recommended. For maximum heat transfer it is recommended
that a heat sink compound be applied between the resistor
base and heat sink chassis mounting surface. It is essential that
the maximum hot spot temperature of 200°C is not exceeded,
therefore, the resistor must be mounted on a heat sink of
correct thermal resistance for the power being dissipated.
Temp. Rise & Power Dissipation
Surface temperature of resistor related to power dissipation.
The resistor is standard heatsink mounted using a proprietary
heatsink compound.
HS300
HS250
HS200
HS150
HS50
HS75
HS25
HS15
HS10
HS100
0 20 50 75 100 150 200 250 300
POWER DISSIPATION (WATTS)
200
100
5
SU RFAC E T EMPER ATU RE RI SE (˚ C)
