RSMF3JT4K70 Resistors

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The RSMF3JT4K70 is one of the newest generation of through hole resistors. This latest resistors offers superior performance with a maximum current rating of more than 4A. The device is constructed from a glass-encapsulated lead frame and a high-temperature cermet element, allowing up to 85°C temperature operation.

The RSMF3JT4K70 is designed primarily for use in equipment offering both high power density and long-term reliability. Examples include DC motor control circuits, power supplies, AC/DC converters, motor controllers, and power amplifiers. Other potential applications are found in fields such as automotive electronics, lighting products, and communication systems.

The RSMF3JT4K70 features a surface-mounted design, meaning that the resistors can fit into tight spaces. The resistor is constructed with a coated ceramic body for superior heat dissipation. The design incorporates a special diaphragm feature between the resistive element and the substrate, offering improved mechanical strength. Additionally, the device has a wide resistance range of 20 to 200kΩ.

In operation, current passes through the resistor’s lead-free metal-layer element. The element acts as a varying voltage divider, producing an output voltage proportional to the input voltage, divided by the resistance of the lead-free metal-layer element.

The device can also be used as a current shunt resistor, since the current passes through the lead-free metal-layer element. The resistance value of the element and the load current determine the output voltage. The device’s thermal protection automatically shuts off the device if the temperature rises above a safe level. Additionally, the device has been designed to benefit from a wide range of power supplies, from AC/DC converters to DC/DC converters.

The RSMF3JT4K70 is an excellent solution for a number of applications that require high power density and long-term reliability. The device’s surface-mount design allows for use in tight spaces, while its wide resistance range and thermal protection make it ideal for a variety of applications. Additionally, the device’s ability to act as a voltage divider or current shunt allows it to be used in a number of different ways.

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