Characteristics - Electrical

Long Term Stability:

For improvements in long-term stability, resistors must be derated

as follows; for 50% of stated ΔR maximum dissipation must not

exceed 70% of rating; for 25% of stated ΔR maximum, dissipation

must not exceed 50% of rating

Insulation Resistance:

Dry: 10,000MΩ minimum. After moisture test: 1000MΩ minimum.

Heat Dissipation:

Although the use of proprietary heat sinks with lower thermal

resistance is acceptable, up rating is not recommended.

The use of proprietary heat sink compound to improve thermal

conductivity is recommended for optimum performance of all

sizes but essential for HSC200, HSC250 & HSC300

Specification:

Temperature coefficient below 100R, 50ppm/°C

Temperature coefficient above 100R, 30ppm/°C

Tolerance, 5% standard: 10%, 3%, 2%, 0.5% & 0.25% available

Tolerance for values below R10, 10% standard

Derating Curve HSA5 to HSA50

0

25

50

75

100

125

150

175 200

225

250 275

Heatsink Temp. (degC)

60

50

40

30

20

10

0

HSA5

HSA50

HSA25

HSA10

0

25

50

75

100

125

150

175 200

225

250 275

Heatsink Temp. (degC)

350

300

250

200

150

100

50

0

Derating Curve HSC75 to HSC300

HSC300

HSC250

HSC200

HSC150

HSC100

HSC75

0.01

0.1

1

10

100

1000

10000

100000

Resistance (Ohms)

400

350

300

250

200

150

100

50

0

HSA5

HSA10

HSA25

HSA50

HSC75

Pulse Energy HSA5 to HSC75

Aluminium Housed Power Resistors

Type HS Series

1773035 CIS BI 10/2011

Dimensions are in millimeters

Dimensions are shown for

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and inches unless otherwise

reference purposes only.

specified. Values in brackets

Specifications subject

are standard equivalents.

to change.