WRR-331 WRR-330 WRR-321 WRR-322 WRR-323 B thermocouples
WRR-331 WRR-330 WRR-321 WRR-322 WRR-323 B thermocouples, chip tunable resistors also have their disadvantages. Because they are chip packages, they have higher requirements for production equipment, and they also have higher quality requirements for tunable resistors. For example, the production of chip devices generally requires that the adjustable resistance of the chip is within one year from the factory. Otherwise, the device will have a long storage time, resulting in pad oxidation and poor soldering. Especially the smaller the package, the higher the quality requirements . Moreover, the adjustable resistance of the chip is worse than the plug-in type.