YESO has sworn to offer its best products to customers, focusing on the leading technologies, the excellent services, and the interactive sales and marketing, being enthusiastic in improving qualities, and constantly enhancing its corporate culture. To ensure the full customer satisfaction, the entire group of YESO staff work with collective wisdom and concerted effort and there is only one objective "High quality; zero defective" that totally isolates our customers from "Defects" and "Inconvenience". We firmly believe that only so doing could really make ourselves the best choice to our customers.

With the support and recognition from different areas including foreign and domestic regions, we are able to maintain a steady growth and become aware of in the resistor industry. Our company appreciates your support and welcomes any suggestions that can help us put our quality policy "Fulfilling our customer's expectation and requirements with high-quality products and services" into effect. It shows the excellence of our products and helps us step towards a more advanced future as well.

1.Smoke emitted from non-flammable resistors on initial use in powered circuits is a normal phenomenon and the component can be safely utilized.
2.All resistors manufactured by Ywh Chau Electric Co., Ltd. comply with the U.S. UL-94 non- flammability test, Class V-0, a continuous combustion period of zero seconds.
3.Never use organic solvents to clean non-flammable resistors.
4.Non-flammable resistors cannot be utilized in oil.
5.Non-flammable resistor cannot be used in high frequency machinery because of the inductance produced by the windings. A suitable type of resistor must be selected. Contact us for details.
6.In applications where resistors are subject to intermittent current surges and spikes, be sure in advance that the components selected are capable of withstanding brief durations of increased load.
7.Do not exceed the recommended usable load. Resistors must used within the rated voltage range to prevent the shortening of service life and/or failure of the wound resistance elements
8.Minimum load. Resistors must be utilized at 1/10 or more of the rated voltage to prevent poor conductance due to oxidation build-up.
9.Although the hardness exceeds that of a 3H pencil lead, do not nick the resistor coating with screw drivers or other pointed objects.
10.Avoid touching non-flammable resistors in operation; the surface temperature ranges from approximately 350¢J to 400¢J when utilized at the full rated value. Maintaining a surface temperature of 200¢J or less will extend resistor service life.
11.Keep temperature from rising by choosing a resistor with a higher rated capacity; do not use a component having the exact load value required. For considerations of safety in extended period applications, the resistor rating should be more than four times higher than the actual wattage involved, but never use a resistor at less than 25% of its rated power.
12.Application and Placement: Wire-wound resistors use different gauges of wire as resistance elements. Sometimes the gauge is extremely thin (finer than a strand of human hair) and very susceptible to breakage in environments containing salts, ash, dust and corrosives. Avoid utilization in such environments. Do not install in dusty areas because the accumulation will cause shorts and poor conductance.