Long term stabilized resistors for meters | High-End MELF SMD Resistors Manufacturer - FIRSTOHM

The environment of the electric grid is complex and changeable, due to inrush pulses being frequently generated by thunderbolts or braker switching ON/OFF, causing large impacts on sensing voltage or current. 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 is 3 times larger than chip resistors, because MELF resistors are cylindrical shapes with an enhanced conductive film that greatly withstand high voltage and is easy for heat dissipation. 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.

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Long term stabilized resistors for meters

The resistors and block diagram of smart meter

The resistors and block diagram of smart meter

Long term stabilized resistors for meters

The environment of the electric grid is complex and changeable, due to inrush pulses being frequently generated by thunderbolts or braker switching ON/OFF, causing large impacts on sensing voltage or current. 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 is 3 times larger than chip resistors, because MELF resistors are cylindrical shapes with an enhanced conductive film that greatly withstand high voltage and is easy for heat dissipation. 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 the 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 to VISHAx.

General Specification

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Metal Film MELF Resistor (0102 size)
Metal Film MELF Resistor (0102 size)

It can be direct alternative to chip resistor(0805 size), due to made by cylindrical ceramic rod, the dimension is 3 times larger than chip resistor, that...

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Stabilized Metal Film MELF Resistor
Stabilized Metal Film MELF Resistor

A kind of stabilized metal film resistor is specially designed for smart meter, the performance is similar to SMM0204/SMM0207.

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Metal Film MELF Precision Resistor
Metal Film MELF Precision Resistor

SMD enable structure, thin film with superior reliability and stability, tight tolerance and low T.C.R.

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Anti-Surge Wirewound Resistor
Anti-Surge Wirewound Resistor

Anti-Surge Wirewound Resistor is operating in the high ambient temperature where amti-surge and power dissipation are required.

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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.