3W 5% Low Inductance Resistor Flame Proof Small Type Pulse Resistor

Features

• High power, Small body size.
• Excellent pulse characteristics.
• Flameproof painting, resistant to heat & solvents.
• Very low inductance (less than 1 μH).

Product Positioning and Core Applications

The NRSS series is a small type anti-pulse non-inductive power resistor designed for electronic circuits that require pulse handling capability and low parasitic inductance. The resistor features flameproof coating with resistance to heat and solvents, while providing a 3W rated power in a compact body size.

A key technical characteristic is its very low inductance of less than 1 μH, making the resistor suitable for circuit sections where resistor inductance needs to be controlled and pulse or short-time overload conditions may occur. This 3W version uses a 5% resistance tolerance for applications requiring a compact power resistor with anti-pulse characteristics.

Product Specifications

The NRSS series is identified as an Anti-Pulse Non-Inductive Resistor (Small Type), with IEC 60115-4 and JIS C 5201-4 listed as reference standards. The product range includes a 3W rated power option, while this product description is limited to the requested 3W specification and 5% tolerance.

Key Performance Data

Very Low Inductance: Less Than 1 μH

The NRSS series is designed as a non-inductive resistor, with inductance specified at less than 1 μH. This provides a specific technical basis for applications where the inductive effect of the resistor needs to be minimized.

Pulse and Short-Time Overload Capability

The product is tested under a short-time overload condition of 16 times the rated wattage for 5 minutes. For the 3W version, this corresponds to a 48W test condition. This value represents a test condition and should not be interpreted as the continuous power rating of the resistor.

Wide Temperature Test Range

The specified temperature testing range extends from -55°C to +155°C, with temperature cycling and load-life test conditions also included in the product data. These specifications provide useful technical references when selecting the resistor for electronic circuits operating across a wide temperature range.

Applications

Pulse Load Protection Circuits

The NRSS resistor can be applied in circuit sections exposed to pulse loads. Its pulse characteristics and short-time overload test condition make it suitable for circuit designs that require resistive handling of transient load conditions.

Low-Inductance Circuits

For circuit sections where parasitic inductance needs to be controlled, the NRSS can be selected based on its specified inductance of less than 1 μH. This characteristic is particularly relevant when the resistor's own inductive effect is an important design consideration.

Power Electronic Circuits

The 3W rated power makes the NRSS suitable for electronic circuits requiring a compact power resistor. Its small body size, power rating and flameproof coating support applications where a compact resistor construction is required.

Circuits Requiring Flameproof Resistor Construction

The NRSS features flameproof coating with resistance to heat and solvents. It can therefore be considered for electronic circuit sections where flameproof resistor construction is required. The product data also specifies non-flammability-related testing as part of its performance characteristics.

Technical Selection Notes

When a circuit requires a combination of pulse characteristics, low inductance and compact power resistor construction, the NRSS 3W version can be evaluated as a component option. For operation at ambient temperatures above 70°C, the product data specifies that the power rating must be derated according to the derating curve. Actual component selection should therefore consider ambient temperature and applied load conditions.