Dale Resistor 2 Ohm 225W – Tubular 5% Power Wound
For applications that demand absolute reliability in load handling and thermal dissipation, the Dale 2 Ohm 225W resistor is an undisputed standard in the electronics industry. Its classic tubular design allows efficient heat dissipation by free air convection, ideal for control panels and heavy machinery.
Detailed Technical Specifications of the Dale 2 Ohm 225W Resistor:
Manufacturer: Dale (Vishay Intertechnology).
Component Type: Tubular Wirewound Power Resistor (Tubular Wirewound Power Resistor).
Impedance / Value: 2 Ohms (Ω).
Rated Power Capacity: 225 Watts (W).
Tolerance: ± 5%.
Dimensions: 260 mm length x 24 mm outside diameter.
Coating: Vitreous enamel or high temperature silicone (characteristic of Dale’s HL/HLZ series).
Product Condition: New Old Stock (NOS). New vintage component that has never been soldered, but has surface wear and scratches on its outer coating due to unprotected bulk storage.
Electrical Test: Verified with multimeter; continuity and ohmic value in perfect condition.
Applications and Use Cases (What is it for?):
Intended for electromechanical engineers, automation technicians and machine refurbishment specialists, this resistor is vital in applications such as:
Dynamic Braking Systems: To absorb regenerative energy from AC/DC motors during deceleration.
Load Banks (Dummy Loads): For stress testing generators, high capacity batteries and industrial power supplies.
Voltage Divider and Limiter Circuits: In heavy motor starting systems, reducing current peaks (Inrush current).
Brand History: Dale’s Legacy
Founded in 1950 in Nebraska, Dale Electronics built a legendary reputation for manufacturing components that met the most stringent U.S. military MIL-SPEC standards. Its wound resistors are famous for withstanding extreme conditions without failure. In 1985, Dale was acquired by Vishay Intertechnology, but the name “Dale” is still imprinted and sought after by electronics purists because of its synonym for unwavering industrial durability.
(FAQ)
Q: Does cosmetic damage to the coating affect the dissipation of the 225W?
R: No. Storage wear is purely cosmetic. As long as the internal resistive wire and connection terminals are intact (which we have verified with multimeter), the resistor will dissipate temperature according to its original factory specifications.
Q: Does this model require mounting on an aluminum heatsink?
R: It is not strictly necessary. Thanks to its generous dimensions of 260x24mm, this tubular model is designed to dissipate heat by free airflow (convection). Just be sure to leave adequate space in your cabinet for air circulation.
Q: Can I use it to test high power audio amplifiers?
R: Although electrically it will function as a dummy load, 2 ohms is a very low value (4 or 8 ohms is usually used for audio) and the wound resistors can present some inductance at high frequencies. Their ideal use is in direct current (DC) or low industrial frequencies (50/60Hz).
