Products

RST Electric introduces the classic Wirewound Rheostat – a manually adjustable power resistor designed for applications requiring smooth, continuous variation of current or voltage. Featuring a rugged ceramic core with exposed wirewound element and a sliding contact arm, this Wirewound Rheostat delivers reliable performance in motor speed control, lighting dimming, laboratory experiments, and industrial equipment calibration. With power ratings from 25W to 500W and resistance ranges from 1Ω to 5kΩ (tolerance ±5%), it provides a simple, cost-effective solution for hands-on adjustment in educational, industrial, and maintenance environments. 

RST Electric presents the Aluminum Housed Braking Resistor – a high-performance power resistor engineered for industrial braking and energy dissipation applications. Featuring an extruded aluminum housing that acts as an efficient integral heatsink, this Aluminum Housed Resistor delivers superior power handling in a compact, rugged package. With power ratings from 60W to 2000W and resistance ranges from 0.1Ω to 10kΩ, it is ideal for variable frequency drives (VFDs), UPS systems, motor control, and heavy machinery. Available in ±1% and ±5% tolerances with TCR options from ±50 ppm/°C to ±350 ppm/°C, this Braking Resistor ensures reliable performance in continuous duty and peak power applications. 

RST Electric presents the Chassis Mount Power Resistor – a high performance aluminum housed resistor engineered for demanding industrial applications. Featuring a metal aluminum crust with excellent heat radiation properties, this Chassis Mount Resistor is designed for cooling plate installation and long-term operation in harsh environments. With power ratings from 5W to 500W and resistance ranges from 0.1Ω to 10kΩ, it delivers reliable performance in power supplies, variable frequency drives (VFDs), elevators, professional audio, and high-end equipment. Available in ±1%, ±2%, ±5%, and ±10% tolerances with TCR from ±100 ppm/°C to ±300 ppm/°C, this Aluminum Housed Power Resistor undergoes rigorous testing including temperature cycling, load life humidity, vibration, and non-flammability verification.

RST Electric introduces the Metal Clad Resistor – a low profile, high-performance wirewound resistor engineered for demanding braking and inverter/converter applications. Featuring a flexible design with exceptional pulse overload capability (10 × rated power for 5 seconds), this Metal Clad Resistor delivers reliable energy dissipation in compact installations. With power ratings from 150W to 600W (up to 1200W when heatsink mounted) and resistance ranges from 2.2Ω to 1.1kΩ, it is ideally suited for dynamic braking circuits, motor drives, and power conversion systems. Standard 600V cables simplify integration, while the low profile design enables installation in space-constrained equipment. Available in ±5% tolerance with low TCR (≤ ±150 ppm/°C), this Wirewound Metal Clad Resistor ensures stable performance under repeated pulse conditions.

RST Electric presents the Grounding Resistor – a critical safety device engineered for medium-voltage power systems requiring fault current limitation. Designed to protect personnel and equipment in generators, transformers, and distribution networks, this Grounding Resistor limits earth fault currents to safe levels while maintaining system stability. With rated system voltages from 6.3kV to 35kV and fault current ratings from 10A to 2000A, it accommodates diverse utility and industrial applications. Available with time ratings from 5 seconds to 60 seconds and resistance values from 1Ω to 9999Ω, it features robust stainless steel grid elements (SUS304/SUS430) housed in corrosion-resistant enclosures. Compliant with IEEE32 standards and tested for BIL up to 170kV, it ensures reliable performance in the most demanding environments. 

RST Electric presents the Neutral Earthing Resistor – a critical safety component engineered for medium-voltage power systems requiring controlled fault current management. Designed to protect personnel and assets in generator neutrals, transformer star points, and industrial distribution networks, this Neutral Earthing Resistor limits earth fault currents to predetermined safe levels while maintaining system continuity. Covering rated system voltages from 6.3kV to 35kV and fault currents from 10A to 2000A, it accommodates diverse applications including power plants, offshore platforms, renewable energy farms, and mining operations. Available with time ratings from 5 to 60 seconds and resistance values from 1Ω to 9999Ω, this Earthing Resistor features corrosion-resistant stainless steel grid elements (SUS304/SUS430) housed in rugged enclosures suitable for indoor or outdoor installation. Compliant with IEEE32 and designed to meet IEC standards, it undergoes rigorous impulse voltage testing with BIL ratings up to 170kV.