The strongest introduction to KAO resistor series

KOA Speer Electronics is a globally renowned manufacturer of electronic components, known for its resistor products that are highly precise, reliable, and diverse. They are widely used in fields such as automotive electronics, industrial control, consumer electronics, and medical equipment. The following are the main series and characteristics of KOA resistors:
1、 Universal resistor series
RK73 series (thick film chip resistor)
Features: Standard thick film process, high cost-effectiveness, size coverage from 0402 to 2512.
Accuracy: ± 1%, ± 5% optional.
Application: General consumer electronics, home appliances, communication equipment.
RK73H series (high-precision thick film resistor)
Features: Accuracy improved to ± 0.5%, temperature coefficient as low as ± 100ppm/℃.
Applications: Precision instruments, medical equipment, testing and measurement.
RK73B series (anti sulfurization thick film resistor)
Features: Adopting an anti sulfurization coating to prevent resistance drift caused by sulfur erosion.
Applications: automotive electronics, industrial environments (such as sulfide pollution scenarios).
2、 Thin film resistor series
RN73 series (metal film thin film resistor)
Features: Thin film process, high precision (± 0.1%), low temperature coefficient (± 25ppm/℃).
Applications: High frequency circuits, audio equipment, precision power supplies.
RN73H series (high-precision thin film resistor)
Features: Accuracy up to ± 0.01%, temperature coefficient as low as ± 5ppm/℃, excellent stability.
Application: Aerospace, military, high-end testing instruments.
RT73 series (automotive grade thin-film resistor)
Certification: AEC-Q200, resistant to high temperature and vibration.
Applications: Automotive ECU, ADAS system, Battery Management System (BMS).
3、 Power resistor series
PWR series (high-power wound resistor)
Features: Power range of 5W to 50W, strong resistance to impact current.
Application: Industrial power supply, charging station, motor drive.
MCR series (metal oxide film resistor)
Features: High power density, resistant to pulse loads.
Application: Lightning protection module, surge protection circuit.
4、 Special Application Resistance Series
LR series (low resistance current detection resistor)
Resistance range: 0.001 Ω to 0.1 Ω, accuracy ± 1%.
Applications: current sampling, battery management, motor control.
SR series (high voltage resistor)
Voltage resistance: up to 10kV, suitable for high-voltage circuits.
Application: Power electronics, high-voltage testing equipment.
TR series (temperature sensor resistor)
Features: NTC/PTC thermistor, temperature range -55 ℃ to+300 ℃.
Applications: temperature compensation, overheating protection, environmental monitoring.
VR series (variable resistor/potentiometer)
Type: Single turn/multi turn potentiometer, precision adjustable.
Application: Calibration equipment, audio equalizer, industrial control.
5、 Automotive grade resistor series
ARK73 series (automotive grade thick film resistor)
Certification: AEC-Q200, resistant to high temperature, humidity, and vibration.
Application: Automotive body control module, lighting system.
ARN73 series (automotive grade thin-film resistors)
Features: High precision (± 0.1%), low noise, suitable for in car sensors.
Application: ADAS camera, radar module.
6、 Miniature resistor series
RK73Z series (0201 ultra small resistor)
Size: 0.6mm × 0.3mm, suitable for high-density PCBs.
Applications: Smartphones, wearable devices, Bluetooth earphones.
RK73B-REEL series (packaged micro resistors)
Features: 0402/0603 size, suitable for automated surface mount production.
Application: Consumer electronics, IoT devices.
How to choose KOA resistor series?
General scenario: RK73 series (preferred for cost-effectiveness).
High precision requirement: RN73H series (± 0.01% accuracy).
Automotive Electronics: ARK73/ARN73 series (AEC-Q200 certified).
High power applications: PWR/MCR series (5W-50W power).
Special environment: RK73B series (sulfur resistant), SR series (high pressure).
It is recommended to select the appropriate series based on specific parameters (resistance, accuracy, power, temperature coefficient), certification requirements, and packaging size. If necessary, contact KOA or its authorized agents to obtain technical documentation or sample testing.