RC0603FR-10330KL

The RC0603FR-10330KL is a 330kΩ thick film chip resistor from Yageo’s RC_L series, designed for general-purpose applications requiring reliable performance across a wide range of operating conditions. Packaged in the industry-standard 0603 (1608 Metric) footprint, this resistor features ±1% resistance tolerance and a ±100ppm/°C temperature coefficient, making it suitable for precision general-purpose circuits where moderate accuracy is required.

Manufactured using thick film technology, the resistor element is screen-printed onto a high-purity alumina ceramic substrate and fired at high temperature to form a durable resistive film. A protective glass overcoat protects the resistive layer from environmental factors including moisture, dust, and mechanical abrasion. The RC_L series incorporates moisture-resistant construction for improved long-term stability in humid environments compared to standard thick film resistors.

The nickel-barrier solderable termination system features a matte tin finish that provides excellent solderability and compatibility with both leaded and lead-free soldering processes. The resistor is supplied on 7-inch diameter reels with paper tape packaging (code 10 = 13-inch reel), containing 5,000 pieces per reel for compatibility with standard high-speed SMT placement equipment.

With a power rating of 0.1W (1/10 watt) at 70°C ambient temperature and an operating temperature range of -55°C to +155°C, the RC0603FR-10330KL is fully RoHS 3 compliant and halogen-free, meeting all current environmental compliance requirements for global electronics manufacturing.

A thick film resistor operates by providing a precisely controlled resistance path through a conductive paste film deposited and fired onto an insulating ceramic substrate.

In the RC0603FR-10330KL, the resistor is constructed on a high-purity 96% alumina (Al2O3) ceramic substrate, chosen for its excellent electrical insulation, high thermal conductivity, and mechanical strength. A conductive resistive paste — typically a mixture of ruthenium oxide (RuO2) or silver-palladium (AgPd) particles suspended in a glass frit binder and organic vehicle — is screen-printed onto the substrate in a carefully controlled pattern. The resistance value is determined by the sheet resistance of the paste and the length-to-width ratio (L/W) of the printed resistor pattern.

After printing, the resistor is fired at high temperature (typically 800°C to 900°C) in a belt furnace. During firing, the organic binder burns off, and the glass frit melts and vitrifies, bonding the conductive particles together and adhering the resistor film firmly to the ceramic substrate. The resulting resistive film is a composite of conductive particles dispersed in a glassy matrix.

Once fired, the resistor value is typically within about 70-80% of the target value. Laser trimming is then used to precisely adjust the resistance to within the specified tolerance (±1% for this part). A laser cuts a precise notch into the resistor film, effectively increasing the current path length and raising the resistance until it falls within the target tolerance range.

A protective overcoat layer of glass is then applied and fired to protect the resistor element from mechanical damage, moisture, and contaminants. End terminations are applied — typically a silver-based inner electrode on the end face, followed by a nickel barrier layer and an outer tin (solderable) plating. The nickel barrier prevents solder leaching during assembly, while the tin plating ensures excellent wetting and solder joint reliability.

When current flows through the resistor, electrical energy is converted to heat through the Joule heating effect (P = I²R). The ceramic substrate conducts this heat away efficiently, allowing the resistor to dissipate its rated power without exceeding temperature limits. The 0.1W power rating of the RC0603FR-10330KL represents the maximum continuous power dissipation at 70°C ambient, with linear derating to zero at 155°C.

Note: The RC0603FR-10330KL is a non-polarized passive component — either terminal can be connected to either side of the circuit. Orientation does not affect electrical performance. The resistive element is symmetrically positioned between the two end electrodes.

• General purpose pull-up and pull-down resistor networks
• Voltage dividers and level shifting circuits
• Signal conditioning and filtering networks
• Consumer electronics — televisions, audio equipment, home appliances
• Industrial control systems and PLC I/O circuits
• Power supply current limiting and feedback networks
• Telecommunications and networking equipment
• Automotive body electronics and infotainment
• LED current limiting and driver circuits