HPRS-F-3-1K High Power Resistance Decade Box

HPRS-F-3-1K High Power Resistance Decade Box

Double click on above image to view full picture

Zoom Out
Zoom In
More Views

Photo represents example of series. See datasheet for more details on any specific model.

  • Resistance from 1 mΩ to 10 MΩ
  • Power Rating : 225 W/decade, 250 W max. or higher (Contact IET for Custom Higher Power Units)
  • Accuracy: 0.5% or 1%
  • Voltage Rating: 1000 V or higher
  • Special and custom configurations available
Priced at $1,432

Estimated Delivery is 2 to 3 weeks

Repair/Calibration Quote Technical Support Request

The High-Power Decade Resistance Substituter (HPRS) Series is a family of resistance decade boxes offering a broad choice of high-power, excellent-performance resistance sources.

The HPRS Series resistance decade boxes employ state-of-the-art precision resistors of various types for high accuracy, high stability, and low temperature and power coefficients of- resistance. High-power resistors within the unit are made available without sacrificing other electrical properties.

The standard models offer a choice of 3 to 8 decades. The panels are clearly labeled showing the step size and maximum voltage and current limitations for each decade.

With a resolution as low as 1 mΩ and a maximum resistance of 10 MΩ , the HPRS resistance decade box may be used as a general purpose substituter as well as a high power load for testing power supplies and for other high-power applications.

Applications include calibration of meters and instruments. HPRS resistance decade boxes are useful development tools wherever precise resistances with high-power handling capacity are required.

HPRS Series High Power Resistance Decade Box Basic Specifications (See datasheet for full specifications)

Option F: ±(1% + 20 mΩ)
Option C: ±(0.5% + 20 mΩ)

Zero Resistance: <5 mΩ per decade

Maximum Voltage to Case: 1000 V peak Switches:
Continuous rotation 10 positions marked "0"-"9"

Resistance per step
Total decade resistance
Max current*
Max power per step* (W)
Temperature coefficient (ppm/°C)
Resistor Type
1 mΩ
0.009 Ω
8 A
Resistance Wire
10 mΩ
0.09 Ω
6 A
100 mΩ
0.9 Ω
6 A
1 Ω
9 Ω
5 A
-20 to +80
Power Film
10 Ω
90 Ω
1.5 A
-20 to +80
100 Ω
900 Ω
0.5 A
-20 to +80
1 kΩ
9 kΩ
150 mA†
-20 to +80
10 kΩ
90 kΩ
50 mA†
-20 to +80
100 kΩ
900 kΩ
V limit†
V limit†
-20 to +80
Wirewound/metal film
1 MΩ
9 MΩ
V limit†
V limit†
*Subject to maximum of 250 W max. per unit: 9 Steps per decade, multiply the decade value by the power per step. Multiple decades can be used to share power loads
†Subject to 1000 V (dc+ac) peak max


Would you like to proceed with your quote, or continue to add products to your quote cart?