What are the categories of ROHM brand resistors?

ROHM, as a leading enterprise in the global semiconductor and electronic components field, has a diverse range of resistor product matrices covering basic circuits to high-end industrial applications, which can be classified into the following six core categories:
1. Classified by materials and technology
Traditional material resistors: including carbon film resistors, metal film resistors, and metal oxide film resistors, meet the requirements of general circuits with cost-effectiveness and basic stability.
Thin film/thick film resistors: Using advanced deposition processes, such as the LTR50 series thick film resistors, achieve 2W high power density and low TCR of ± 100ppm/℃, suitable for consumer electronics current detection.
Special material resistors: such as alloy resistors, low resistance resistors (0.5m Ω to 910m Ω), using a non adjustable resistor structure to suppress temperature rise, widely used in motor control and battery management.
2. Classify by packaging form
Plug in resistor: Provides radial and axial pin packaging, suitable for traditional circuit board designs such as industrial equipment power modules.
Surface Mount Resistors (SMD): Covering standard sizes from 0402 to 6432, the MCRx series achieves high precision through laser resistance tuning, while the MCRL series supports high temperature applications up to 155 ℃, helping to miniaturize electronic devices.
3. Classified by application field
Universal resistor: meets the basic voltage division and current limiting requirements, widely used in consumer electronics and general industrial circuits.
Precision resistor: With a core of ± 0.1% accuracy and low TCR (≤ 20ppm/℃), it serves measuring instruments and calibration equipment.
Power resistor: rated power up to 5W, such as PMR100 series, using 6432 size to achieve 5W power density, suitable for industrial inverters and server power supplies.
Automotive grade resistor: certified by AEC-Q200, with a working temperature range of -65 ° C to+175 ° C, used in automotive systems such as EPS and ADAS controllers.
Special application resistors: including sulfur resistant resistors (resistant to harsh environments) and pulse load resistors (resistant to transient overvoltage), specially customized for the energy and aviation fields.
4. Classify by functional characteristics
Adjustable resistor (potentiometer): Provides manual or electronic adjustment function, used for calibrating audio equipment and industrial control parameters.
Sensitive resistors, such as thermistors (NTC/PTC) and photoresists, achieve temperature compensation and light intensity detection, and are widely used in IoT sensors.
Fuse resistor: Integrated overcurrent protection function, replacing traditional fuses in consumer electronics and communication devices, enhancing circuit safety.
Technical advantages and certification
Material innovation: Using SiC (silicon carbide) and GaN (gallium nitride) materials, such as SiC power module resistors, to reduce the volume of electric vehicle chargers by 30%.
Technological breakthrough: The LTR50 series achieves a 2W power density and ± 100ppm/℃ TCR by optimizing the resistor material, and improves current detection accuracy by 40%.
Extreme environmental adaptability: Automotive grade resistors have passed AEC-Q200 certification and operate in a wide temperature range of -65 ℃ to+175 ℃, meeting the stringent requirements of in vehicle electronics.
High precision and reliability: PMR100 series resistance temperature coefficient ± 75ppm/℃, long-term stability deviation<0.5% (after 2000 hours).
Application area coverage
Industrial control: motor drive, power management, factory automation (such as PLC, AC servo system).
Automotive electronics: EPS, electric compressor, BMS battery management system, ADAS controller.
Consumer electronics: white goods (air conditioners, refrigerators), smart devices (mobile phones, drones).
Energy sector: solar power generation systems, energy storage inverters, electric vehicle charging stations.
Communication equipment: 5G base station power supply, server power supply, high-speed optical module.
ROHM resistors are based on material science, process innovation, and extreme environmental adaptability, building a complete solution from basic circuits to high-end industrial applications. Its products have passed international certifications such as UL, VDE, AEC-Q200, ensuring global market access and becoming the preferred brand for customers in the automotive, industrial, energy and other fields.