The core advantages of the CRH series high-power resistors from Tian'er Technology

The core advantages of the CRH series high-power resistors from Tian'er Technology
 
Ever Ohms' CRH series high-power thick film surface mount resistors have become the preferred solution in industrial control, automotive electronics, new energy and other fields due to material innovation, process breakthroughs and scene adaptability. Its core advantages are reflected in the following dimensions:
 
1、 Process and Material Innovation: Breaking the Performance Boundary of Thick Film Resistors
1. High power density design:
The CRH series uses ruthenium based oxide slurry screen printing technology to form a resistance layer on an alumina ceramic substrate by high-temperature sintering at 850 ℃, with a thickness of 100 μ m and a power density of up to 70W/cm ² (equivalent to more than 5 times that of thin film resistors). Taking the 2512 package (6.4mm × 3.2mm) as an example, the standard power reaches 2W, and some models can be expanded to 3W, far exceeding the 1W limit of traditional thick film resistors.   
 
2. Stability and reliability:
Temperature adaptability: Supports wide temperature range operation from 55 ℃ to+155 ℃, with a temperature coefficient as low as ± 100ppm/℃, ensuring that the resistance drift rate is less than 0.5% in extreme environments;   
Surge resistance: capable of withstanding 2000 temperature cycles (40 ℃ to+125 ℃) and 100A pulse current surge within 5ms, with an instantaneous withstand voltage of 2000V, suitable for high stress scenarios such as motor starting and lightning protection.   
 
2、 Electrical Characteristics and Accuracy: Balancing Power and Control Contradictions
1. Precise parameter control:
 
The full resistance range covers 0.5m Ω -30M Ω, supporting multiple levels of accuracy including ± 0.1%, ± 0.5%, ± 1%, and ± 5%. For example, CRH0603B43R2P05Z has an accuracy of ± 0.1%, meeting the requirements of precision voltage division and current detection;   
The working voltage is 200V, which can be directly applied to 400V power battery systems (such as new energy vehicle BMS), simplifying the voltage divider network design.   
2. Environmental adaptability optimization:
By strengthening the glass glaze protective layer and end electrode structure, the resistance drift rate is less than 0.5% in a humid and hot environment of 85 ℃/85% RH, and it has been certified by IATF 16949 and AECQ200 automotive standards, adapting to the strict standards of automotive electronics.   
 
3、 Application scenario coverage: from industrial control to high-frequency communication
1. High power industrial scenarios:
 
As a current detection resistor in the industrial servo motor drive module (such as the 75 Ω model CRH2512F75R0E04Z), the ± 1% accuracy ensures the linearity of the PWM signal and reduces the risk of motor vibration;   
The design of new energy charging piles supports 2A continuous current, reduces the number of parallel resistors, and optimizes the heat dissipation structure.   
2. High frequency and miniaturized equipment:
Undertaking transient voltage surges in the power module of 5G base stations, the 0603 package model (such as CRH0603F44R2P05Z) has a power of 0.125W, balancing space constraints and power requirements;   
The LED driver circuit can directly connect high-power LEDs of 3W or more in series, simplifying the design of constant current sources.   
 
4、 Cost effectiveness and supply chain advantages