Long term stabilized resistors for meters / More than 50 years of resistor manufacture experience

The environment of electric grid is complex and changeable, due to inrush pulses are frequently generated by thunderbolts or braker switching ON/OFF, caused large impacts on sensing voltage or current. In order to reduce the impacts on resistance variation, it is recommended to adopt MELF resistors for sampling voltage and current. In comparison to the chip resistors, the dimension of MELF resistors are 3 times larger than chip resistors, because of MELF resistors are cylindrical shapes with enhanced conductive film that greatly withstand high voltage and easy for heat disspation. Whether in function, mechanical structure, electrical characteristics, or safety, they are significantly better than the chip resistors. FIRSTOHM Long term stabilized resistors for meters Introduction. More than 50 years of resistor manufacture experience. FIRSTOHM is one of the few companies who is able to design thin-film resistors according to customer's requirements with high quality and reliability. We’re specialized in MELF resistors since 1969, ISO9001/14001 certificated manufacturer.

qrc@firstohm.com.tw

On Duty: 9am - 6pm

First resistor & condenser Co. Ltd.

The resistors and block diagram of smart meter

Long term stabilized resistors for meters

The environment of electric grid is complex and changeable, due to inrush pulses are frequently generated by thunderbolts or braker switching ON/OFF, caused large impacts on sensing voltage or current. In order to reduce the impacts on resistance variation, it is recommended to adopt MELF resistors for sampling voltage and current. In comparison to the chip resistors, the dimension of MELF resistors are 3 times larger than chip resistors, because of MELF resistors are cylindrical shapes with enhanced conductive film that greatly withstand high voltage and easy for heat disspation. Whether in function, mechanical structure, electrical characteristics, or safety, they are significantly better than the chip resistors.


Feature

★SM204 – For current/voltage sensing, Ultra stability and high pulse load.
★MM102/MM204 series - For current/voltage sensing (low TCR, long term stability and Anti-surge).
★SWA series(THT type) for Power module.
SWA is a wire wound axial resistor with superior Anti-Surge capability, it has granted worldwide patents of weld spot between wired metal alloy and metal electrode. It’s the best alternative of VISHAx.

General Specification

High-End MELF SMD Resistors Manufacturer - FIRSTOHM

Located in Taiwan since 1969, First resistor & condenser Co. Ltd. is a MELF type resistor manufacturer. ISO9001/14001 certificated, award winning and patented design thin-film resistors, including anti-surge resistor, precision resistor, stability resistor, high voltage resistor, current sense resistor, automotive grade resistor, high power resistor, circuit protection resistor, fusible resistor and so forth.

FIRSTOHM's resistors are being widely used in industry applications, such as power supply, telecom, meter, medical, automotive and lighting. The strong R&D has allowed FIRSTOHM to develop new technology and obtain hundreds of patents, as well as develop specialty resistors, such as high voltage resistor, short circuit protection resistor, dual power resistor, high humidity resistor, etc.

FIRSTOHM has been offering customers high quality MELF resistors since 1969, both with advanced technology and 50 years of experience, FIRSTOHM ensures each customer's demands are met.