What are the core parameters of thin film precision chip resistors?

The core parameters of thin film precision chip resistors mainly include the following aspects:

1、 Basic electrical parameters
Resistance (R):
The main parameters of a resistor represent its obstructive effect on current. The resistance range of thin film precision chip resistors is wide, usually ranging from 10 Ω to 10M Ω.
Accuracy:
Indicate the error between the actual resistance value and the nominal resistance value of the resistor. The accuracy of thin film precision chip resistors is usually high, reaching ± 0.01% or higher.
Rated power (P):
The maximum power dissipation allowed by a resistor under normal operating conditions. Beyond this power, the resistor may overheat and be damaged. The rated power of thin film precision chip resistors varies depending on size and packaging, with common power values including 0.06W, 0.1W, etc.
Temperature coefficient (TCR):
Indicates the degree to which the resistance of a resistor changes with temperature. The temperature coefficient of thin film precision chip resistors is usually low, such as ± 5ppm/℃ or lower, which means that their resistance changes very little with temperature.
2、 Packaging and Size
Packaging form:
Thin film precision surface mount resistors are usually packaged in surface mount, with common packaging sizes including 0402, 0603, 0805, 1206, etc. The larger the packaging size, the greater the power that the resistor can withstand.
Size:
Each packaging form corresponds to a specific size, for example, the resistor length of 0402 packaging is 1.00 ± 0.10mm, the width is 0.50 ± 0.10mm, and the height is 0.30 ± 0.10mm.
3、 Other parameters
Maximum operating temperature:
The maximum temperature at which a resistor can function properly. The maximum operating temperature of thin film precision chip resistors is usually high, which can meet the working requirements of most electronic devices.
Moisture resistance:
Indicates the resistance of a resistor to moisture. High quality thin-film precision surface mount resistors typically use reinforced protective coatings to prevent moisture from entering the resistor layer, thereby improving their moisture resistance.
Long term stability:
The ability of a resistor to maintain stable resistance over a long period of time. Thin film precision chip resistors have excellent long-term stability and can operate stably for a long time in harsh environments.
Acceptable customization:
Some thin film precision chip resistors can be customized, such as larger size and rated power, higher resistance, and lower temperature coefficient.
In summary, the core parameters of thin film precision chip resistors include resistance value, accuracy, rated power, temperature coefficient, packaging and size, maximum operating temperature, moisture resistance, long-term stability, and the ability to accept customization. These parameters collectively determine the performance and applicability of the resistor.