JRM Adjustable Resistor 50 Ohm 200W – Tubular Wound

In automation and power control, reliability is non-negotiable. The JRM Adjustable Resistor 50 Ohm 200W represents the standard of Japanese engineering durability. Designed to dissipate extreme heat in harsh environments, this tubular wire-wound component excels in adjustability, allowing technicians to derive accurate voltages or calibrate currents in real time.

Technical Specifications of JRM 50 Ohm 200W Adjustable Resistor:

• Manufacturer: JRM (Japan Resistor Mfg. Co.).

• Component Type: Adjustable Wirewound Power Resistor (Adjustable Wirewound Power Resistor / Slide Wire Rheostat).

• Impedance: Adjustable from 0 to 50 Ohms (Ω).

• Power Capacity (Dissipation): 200 Watts (W).

• Tube dimensions: 253 mm length x 25 mm outside diameter.

• Mounting and Connections: Incorporates screw terminals at the ends and a movable metal center clamp for ohmic value selection.

• Coating: High temperature industrial enamel/silicone (gray/dark green color), formulated to resist corrosive environments and thermal shock.

• Product Condition: Used / Tested. The piece looks aesthetically impeccable, with no signs of overheating. As it does not have its original packaging or factory traceability, it is strictly catalogued as used. It has passed continuity and resistance tests with precision multimeter, guaranteeing 100% functionality.

Applications and Uses (What is this JRM 50 Ohm 200W Adjustable Resistor for?):
The inclusion of a slider makes it a versatile tool for both laboratory and industrial board:

1. Power Voltage Dividers: Allows a fraction of a source’s total voltage to be extracted to power auxiliary circuits.

2. Machinery Calibration: Used to adjust field current in direct current (DC) motors or drive systems.

3. Test Loads (Dummy Loads): Ideal for performance and stress testing of power supplies, generators and amplifiers.

Manufacturer’s History (JRM – Japan Resistor Mfg. Co.):
JRM is a historic Japanese manufacturer specializing in highly demanding passive components. Over the decades, it has positioned itself as a key supplier to the automation, railway and power generation industries in Asia and the world. Its components are manufactured under strict JIS (Japanese Industrial Standards), which ensures that a legacy part such as this retains its structural and electrical integrity over time.

(FAQ)

Q: Why is it offered as a “used” component if it looks new?
R: In our e-commerce we prioritize transparency. Since the resistor does not have its original packaging and factory seals intact, we cannot guarantee its previous storage history or plant use. We sell it as used, but we back it up by confirming that it has been tested with a multimeter and works perfectly.

Q: How do I set the resistance value?
R: The setting is made using the central metal clamp (cursor). Just loosen the screw, slide the clamp along the exposed track until the required ohms are measured (between 0 and 50 Ω) and tighten the screw firmly.

Q: Is it safe to hot fit the sliding clamp?
R: No. Under no circumstances should you move the clamp while the resistor is under electrical load (energized). Always do this with the power off to avoid arcing, burns or circuit damage.