기능

• Carbon resistors are the basis of resistors for low power. It has been used for general circuits that do not require difficult considerations. In terms of performance, metal film resistors are superior in almost all respects. In particular, it is not suitable for precise applications where the resistance to temperature varies greatly. Therefore, a tolerance of ±5% is typical, and the number of significant digits is two. Note that even if the resistance value is the same as the basic metal film resistance with an allowable error of ±1% and three significant digits, the value is indicated differently. Since metal film resistors have become cheaper than before (For example, in the case of 1 kΩ, carbon tolerance 5%=102, brown black red gold, gold skin tolerance 1%=1001, brown black black brown, color code final digit represents tolerance), they are often adopted. It is not suitable for applications that generate heat, and those with an allowable loss of 1W or more are now special. Metal oxide film resistance, winding resistance, enamel resistance, and cement resistance are used for high-power applications. A metal film type is used for areas where low noise is required due to high noise. However, it is said that there is a sound quality peculiar to carbon for audio, and it is sometimes used.