UNIROYAL's alloy resistors mainly belong to its alloy low resistance series. This series of products is known for high precision, low temperature coefficient, and high reliability, and is widely used in fields such as automotive electronics, industrial control, and new energy. The following is an analysis of the series attribution and naming rules for alloy resistors:
1、 The series to which the alloy resistor belongs
Thick sound alloy resistors are usually labeled with "LR" as the series identifier (such as the example model LR123WF100LT4E). This series focuses on low resistance and high power density application scenarios, combining special materials and processes to meet the requirements of harsh environments such as high temperature and high current. In addition, Thick Sound also offers other resistor series, such as:
RA/RN series: automotive grade resistor, compliant with AECQ200 standard, resistant to high temperature and vibration;
HP/HPR series: sulfur resistant resistor, suitable for high sulfur environments;
AS series: high-precision resistor with a temperature drift coefficient as low as ± 5ppm/° C.
2、 Naming convention for alloy resistors
Taking the typical model LR123WF100LT4E as an example, its naming convention is analyzed as follows:
LR: represents the type of resistance, where "LR" stands for alloy resistance.
123: Model identification or customer code, which may be related to specific applications or customer customization.
WF: Special identifier, which may represent a product line or specific specifications (such as power level, material process).
100: Resistance code, unit is Ω, here it is 100 Ω.
LT: Temperature coefficient identification, for example, "LT" represents low temperature coefficient (specific values need to refer to the data manual).
4: Tolerance level, where "4" corresponds to ± 0.5%.
E: The packaging form, such as "E", may indicate bagged or rolled packaging.
Additional examples:
HV06W4F5102T5E: High voltage resistor (starting with HV), resistance 5102 Ω, tolerance ± 5%;
HQ06W4J0000T5E: Vehicle grade high-power resistor (starting with HQ), detailed parameters need to be confirmed in conjunction with the manufacturer's manual.
3、 General characteristics of naming conventions
Prefix differentiation series: such as LR (alloy), HV (high voltage), HQ (high power according to vehicle specifications), etc.
Resistance coding rules:
Direct numerical representation (such as 100=100 Ω) or combination of letters and numbers (such as 4K7=4.7k Ω).
Suffix identification characteristics:
Tolerance (such as F=± 1%, K=± 10%);
Temperature coefficient (e.g. LT=low temperature drift);
Package size (e.g. 06=06032512=6.4mm × 3.2mm).
4、 Selection and Precautions
Refer to the data manual: Naming rules may vary due to series or iterative updates, and it is recommended to follow the official documentation.
Application scenario matching:
Alloy resistors are suitable for high current, high-power scenarios such as power management and motor drive;
Vehicle grade resistors must comply with AECQ200 standards, with a focus on durability and temperature range.
Special customization needs: Thick sound supports customized services for resistance, packaging, and environmental resistance performance.
If you need to further understand the specific model parameters or series extensions, you can refer to the official information of Housheng or contact its authorized agent to obtain the data sheet.