Features

1. Super heat dissipation small linear temperature coefficient.
2. Instant overload capability low noise figure and low annual shift on resistance values.
3. Flameproof, light weight, price is lower than enamel types.
4. Winding wires are much more durable than enamel types which are produced in high temperature.

Product Positioning and Core Use

The KNP Series 1% Flameproof Wire Wound Resistor is a power-type wirewound resistor designed for circuits requiring defined power handling, heat dissipation, and short-time overload capability. The series covers rated power levels from 1/4W to 10W and provides a 1% resistance tolerance option.

The flameproof wire wound construction is suitable for resistor positions where power dissipation and electrical insulation are important design considerations. The product series is tested for short-time overload at 10 times the rated wattage for 5 seconds, while the specified insulation resistance is 1,000MΩ. Its environmental characteristics include temperature cycling from -55°C to +200°C.

Product Specifications

Performance Data for Engineering Evaluation

1. 10× Rated Wattage Short-Time Overload

The KNP Series specifies a short-time overload test of 10 times the rated wattage for 5 seconds. This parameter can be referenced when evaluating wirewound resistors for circuits that may experience short-duration overload conditions. It is a specified test condition and should not be interpreted as a continuous operating rating.

2. -55°C to +200°C Temperature Conditions

The environmental characteristics include a temperature cycle from -55°C to +200°C. This provides a defined temperature range for engineering evaluation of the resistor under changing environmental conditions.

For resistors operated at ambient temperatures above 70°C, the rated power must be derated according to the product's derating curve.

3. 1,000MΩ Insulation Resistance

The specified insulation resistance is 1,000MΩ, with the test conducted using a DC 100V or 500V megger according to the listed test conditions. This provides a measurable electrical insulation parameter for component evaluation.

4. 1/4W–10W Power Range

The KNP Series covers multiple rated power levels from 1/4W to 10W, allowing engineers to select a suitable power wirewound resistor according to circuit power requirements.

Applications

Industrial Power Circuits

In industrial power and control equipment, the KNP flameproof wire wound resistor can be used at resistor positions requiring current limiting, power dissipation, or voltage distribution. The 1/4W–10W power range provides multiple options for different circuit power requirements.

Power Supply Circuits

In power supply circuits, the power wirewound resistor can be applied to resistor-load positions involving power dissipation, current limiting, or voltage distribution. The specified 10× rated wattage for 5 seconds short-time overload test can be used as a reference when evaluating resistor requirements under transient load conditions.

Industrial Control Equipment

For industrial control equipment, the KNP Series can be used in electrical circuits requiring a flameproof wire wound resistor with defined power and resistance characteristics. The 1% resistance tolerance, 1,000MΩ insulation resistance, and specified temperature and overload test conditions provide measurable parameters for engineering component selection.