10Ω 500W Tubular Wirewound Resistor – Industrial Grade
Performance & Reliability for Industrial Environments
In power electronics, thermal management and current limiting require robust components. The 10Ω 500W wirewound resistor is an industrial-grade passive component designed to withstand high temperatures and extreme voltage surges. Its construction features a high-quality steatite ceramic core, around which a special alloy resistive wire is wound, all sealed under a green vitreous enamel coating that protects against moisture and corrosion.
Applications & Main Uses
Due to its 500-watt power dissipation capability, this component is not intended for consumer electronics, but for engineers, maintenance technicians, and industrial facilities. Its uses include:
Dynamic Braking: Energy dissipation in variable frequency drives (VFDs) and large electric motors.
Load Banks: Capacity testing for generators, batteries, and solar inverters.
Capacitor Discharge: Safety discharge in high-voltage power supplies.
Current Limiting: Soft start for heavy machinery.
Condition Analysis & Testing – 10Ω 500W Wirewound Resistor
Transparency Note: This is a reclaimed (used) or New Old Stock (NOS) component. As shown in the images, it may present minor surface chipping on the vitreous enamel coating and wear on the metal terminals. These are purely cosmetic and do not affect performance. The internal resistive element is fully intact, and each unit is tested for continuity and impedance using a precision multimeter prior to shipping to ensure 100% functionality.
Technical Data Sheet – 10Ω 500W Wirewound Resistor
| Technical Specification. | |
| Component Type | Tubular power resistor Wirewound |
| Resistance Value: 10 Ω (Ohms) | |
| Power Dissipation: | 500 W (Watts) |
| Estimated Tolerance: | ±5% to ±10% (Industrial standard) |
| Physical Dimensions: | 269 mm (Length) í— 25 mm (Diameter) |
| Refractory Ceramic | |
| Coating material: | Vitreous enamel |
| Terminal Type: | Metal screw clamps (Lug€‘type terminals) |
| Item Condition: | Used / Tested (Functional) |
Manufacturer / Brand History
Upon detailed analysis of the component (black stenciled lettering “10R 500W” on green enamel and terminal design), no registered commercial logo is visible.
Design history: This manufacturing format belongs to the classic tubular resistor standard developed in the mid-20th century by pioneers such as Ohmite Manufacturing (USA) and Danotherm (Europe). The green vitreous enamel became the military and industrial industry standard during the Cold War due to its extreme heat resistance and flame-retardant properties. This particular product corresponds to a generic OEM (Original Equipment Manufacturer) unit for heavy industrial machinery, manufactured under the same strict dissipation standards as major brands.
(FAQ)
Q: Does this 500W resistor include mounting brackets?
A: No. It is supplied exactly as shown in the images, with only the end terminal clamps included. Additional ceramic or metal mounting supports are required if it will be installed in a chassis.
Q: It has wear on the green enamel, does this affect its performance?
A: Not at all. The vitreous enamel acts as an environmental insulator. Small chips are common in used equipment. The vital thing is the integrity of the internal metal wire, which is tested with a multimeter before packing.
Q: Can it be used as an RF dummy load?
A: Not recommended for high frequencies (RF), because as a wirewound resistor (enameled wire coiled), it has high parasitic inductance (it is inductive). It is ideal for DC and low industrial frequencies (50/60 Hz).
