PSM900JB-390R

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Through Hole Resistors

Through hole resistors consist of a fixed resistor element, usually a cylindrical metal or ceramic substrate with a metal film paste on its surface. It can be accommodated inside a cylindrical plastic package or a flat metal package, and is shielded by a metal shell or plastic base. The common type is the axial leaded resistor, which is fixed by welding the lead wires on the substrate on both sides. The connector is fixed into the circuit board by soldering and wiring. The radial leaded resistor is fixed to the circuit board by two short-axis leads, and the connectors are soldered onto the circuit board. Through hole resistors are classified into two types according to the working principle: fixed resistors and adjustable resistors.

1.PSM900JB-390R Application Field

PSM900JB-390R is a through hole resistor that is designed for power applications. It has a power rating of 900 watts and a resistance range of 390 ohms. Its main applications are in power supplies, high-end consumer electronics, and precision and medical instrumentation. This product is an ideal solution for high voltage and power requirement applications, featuring high temperature tolerance, low inductance, fast cycle steadiness and high ripple current capacity.

2.PSM900JB-390R Working Principle

The working principle of the PSM900JB-390R through hole resistor is based on Ohm’s Law, which states that the voltage across a resistor is proportional to the current passing through it. The resistance value is set by adjusting the amount of material pasted onto the resistor’s surface. The PSM900JB-390R is designed in such a way to ensure accurate tolerance and temperature stability. Its construction also results in a low thermal coefficient of resistance and a significant self-heating power capability.

The PSM900JB-390R is designed with a flame retardant sleeve and an insulation sleeve to cope with extreme temperatures and prevent short circuits and other safety issues. Its ceramic substrate is designed to dissipate heat faster and can withstand temperatures up to 180 °C. The product is also equipped with an integrated thermal disconnect for additional safety. The thermal disconnect will open the circuit when temperature rises above the rated limit, allowing the resistor to cool down.

The PSM900JB-390R through hole resistor is a highly reliable and cost effective solution for applications with high power requirements. It is ideal for use in applications where precise control or continuous operation is required, such as medical instrumentation, lighting, and HVAC control systems.

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