CRH2512J4R30E04Z: Detailed explanation of a 4.3 Ω high-power thick film resistor
Among numerous surface mount resistors, CRH2512J4R30E04Z is a high-power thick film surface mount resistor produced by EVER OHMS. Its core feature is to achieve a rated power of up to 2W in the standard 2512 package size, with a resistance of 4.3 Ω and an accuracy of ± 5%. This resistor is very common in circuits that require handling large currents, such as power supplies and industrial controls.
Interpretation of Model Identification
The model "CRH2512J4R30E04Z" contains all the key identity information of the resistor:
CRH: High power thick film resistor series representing Tian'er Technology.
2512: indicates its package size, with a length of 6.30mm (0.25 inches) and a width of 3.20mm (0.12 inches), which is the imperial code.
J: The accuracy (tolerance) of the resistance is ± 5%.
4R30: This is the resistance code, representing a resistance value of 4.3 Ω. Among them, "R" represents the decimal point.
E04Z: It is usually related to the packaging method (tape) and the number of trays (such as 4000 per tray).
Core parameters and characteristics
Understanding the specific parameters of CRH2512J4R30E04Z is the foundation for its correct application.
Electrical parameters
|Parameter item | Specification value | Description|
|Nominal resistance | 4.3 Ω | Design resistance of the resistor at room temperature. |
|Resistance accuracy | ± 5% | The actual resistance value may deviate from the nominal range, determined by the code "J". |
|Rated power | 2W | Maximum power that can operate safely for a long time at an ambient temperature of 70 ℃. |
|Working voltage | 200V | Maximum DC or AC voltage allowed to be continuously applied across the resistor. |
|Temperature coefficient | ± 400 ppm/℃ | The percentage change in resistance value per 1 ℃ of temperature variation affects the stability of resistance value. |
Physical and Environmental Characteristics
Package size: Standard 2512 SMT package, suitable for automated surface mount (SMT) production.
Working temperature range: -55 ℃ to+155 ℃, suitable for most industrial and consumer electronics working environments.
Reliability: Compliant with the EU RoHS directive, made on ceramic substrates using thick film technology, with good stability and reliability.
Main application scenarios
With a power of 2W and a small resistance of 4.3 Ω, CRH2512J4R30E04Z plays an important role in the following circuits:
1. Power supply and power management circuit
Switching power supply: can be used for buffering absorption circuits on the primary side or for false loads on the secondary side, consuming excess energy.
LED driver: As a current limiting resistor for high-power LED lights, it stabilizes the current at the set value.
Power allocation: In sampling or shunt applications that require low resistance and high power, such as current detection.
2. Industrial and consumer electronic devices
According to the product information of Tian'er Technology, its CR series resistors are widely used in multiple fields:
Consumer electronics: voltage divider and bias circuits in entertainment devices such as televisions and speakers.
Household appliances: power control components in electronic control boards such as air conditioners and refrigerators.
Communication equipment: related circuits in power modules of mobile phones, base stations, and other devices.
3. Other common scenarios
CRH2512J4R30E04Z can be considered for applications that require a resistance of around 4.3 Ω within a limited circuit board space and can withstand high power consumption (up to 2W). It is often used to replace solutions that require parallel connection of multiple low-power resistors, which helps simplify design and save PCB area.
Selection and usage precautions
When designing and procuring the use of CRH2512J4R30E04Z, there are several points to note:
Power derating usage: The 2W rated power of a resistor usually refers to the value at 70 ℃ environment. When the ambient temperature exceeds 70 ℃, the power consumption must be reduced according to the manufacturer's derating curve to ensure long-term reliability.
Heat dissipation design: Although it has high power, heat dissipation still needs to be considered. When laying out PCBs, ensuring proper air circulation around resistors or connecting larger copper foils to assist in heat dissipation can improve their actual power carrying capacity.
Procurement information: This model is usually sold in the form of bundled reels, with a common minimum packaging quantity of 4000 pieces per reel. Supplier information can be found on mainstream electronic component e-commerce platforms such as Lichuang Mall and Huanian Mall.
Alternative considerations: If different resistance values, higher accuracy, or better temperature coefficients are needed, you can refer to the selection manual for the CRH series from Tian'er Technology. This series offers various sizes from 0402 to 2512, with a resistance range covering 10m Ω to 10M Ω. Accuracy options include ± 1%, ± 5%, etc., and power ranges from 0.1W to 2W.
In summary, CRH2512J4R30E04Z is a practical thick film surface mount resistor that achieves a balance between power and size. For engineers, understanding its core features of 4.3 Ω resistance, 2W power, and 2512 package can quickly determine whether it is suitable for their current control, energy consumption, or power distribution circuit design.
