Resistor 17 Ohm 200W – Tubular Wirewound Enameled with Mounts
When thermal management and power control are critical, the 17 Ohm 200W tubular enameled resistor is the choice of professionals. Its design, consisting of wire wound around a ceramic core and sealed with high-temperature vitreous enamel, provides exceptional protection against moisture, corrosion, and voltage spikes€”essential characteristics in power electronics.
Detailed Technical Specifications of the 17 Ohm 200W Resistor:
Component Type: Tubular Wirewound Power Resistor.
Resistance: 17 Ohms („¦) – Verified.
Rated Power: 200 Watts (W).
Dimensions: 225 mm length x 25 mm outer diameter.
Mounting: Includes metal brackets at the ends for secure installation on a panel or chassis.
Coating: Brown vitreous enamel, typical of high-power industrial applications.
Product Condition: New Old Stock (NOS). Unused piece, lacks original packaging. Has a “vintage” appearance with superficial cosmetic wear from storage, but its terminals and resistive core are at 100% of their operational capacity. Electrically tested.
What is this 17 Ohm 200W Resistor used for and what are its applications?
This component is aimed at electromechanical maintenance technicians and industrial design engineers. Its most common applications include:
Dynamic Braking: Essential in variable frequency drives (VFD) to dissipate energy from motors that decelerate rapidly.
Motor Starting Systems: Acts as a current limiter during the startup of heavy motors, protecting the circuit from harmful surges.
Industrial Load Banks: Used to test the performance of power supplies, generators, and backup batteries under sustained stress.
History and Manufacturing Style:
Although the piece lacks a visible marking in the photograph due to age, its brown enamel format with lug terminals and mounting brackets is the classic design popularized by the legendary American brand Ohmite (particularly their Series 270). Since the 1930s, Ohmite established the world standard for “indestructible” resistors used in military and heavy industrial applications. This product emulates and upholds those same historic standards of reliability and open-air convection dissipation.
(FAQ)
Q: What advantage do the included metal brackets offer?
The brackets allow the resistor to be securely mounted elevated above the metal chassis of an enclosure. This prevents intense heat (up to 300°C at full load) from damaging nearby components and facilitates optimal thermal dissipation through air convection around the entire cylindrical tube.
Q: Does the lack of original packaging affect its functional warranty?
A: Not at all. As a New Old Stock (NOS) component, it has never been installed. Although it shows cosmetic signs of having been stored with other parts, its internal winding and protective enamel coating are intact. It is delivered tested and electrically confirmed with a multimeter.
Q: Is it suitable for direct current (DC) and alternating current (AC) applications?
A: Yes, high-power wirewound resistors are suitable for both types of current. They are purely resistive components at standard industrial frequencies (50/60 Hz) and DC, ideal for motor control, heaters, or surge energy absorption.
