Power Resistor 5W 1.8kΩ

Description

Power Resistor 5W 1.8kΩ The 5 W, 1.8 kΩ power resistor is a cement-type (ceramic-cased) fixed resistor manufactured with a robust ceramic core and a resistor element of either metal-oxide film or wire-wound construction. Its body is filled/sealed with silicon cement (UL-94V-0 compliant) and terminated with tinned iron caps and tinned lead wires, producing a compact, heat-resistant package designed for steady power dissipation. At its 5 W rating the resistor is intended for continuous operation within the rated ambient (derating applies above 70 °C); it exhibits defined temperature coefficients (metal-oxide ≈ ±350 ppm/°C; wire element ≈ ±260 ppm/°C) and is built to tolerate short-time overloads and pulse stresses within the limits shown in the spec table. The rated voltage is calculated from √(P×R), giving about 94.87 V for 5 W × 1.8 kΩ. The resistor is specified to meet JIS C 5202-based tests: insulation resistance, solderability, resistance to soldering heat, temperature cycling, humidity load life and 1,000-hour load-life tests at elevated temperature all demonstrating stable resistance change limits (typical post-test change limits listed in the sheet). These traits make it a rugged passive element for circuits requiring predictable dissipation and long-term stability. Features: Cement (ceramic) body with high-alumina ceramic core. Resistor element available as metal-oxide film or wire-wound. Silicon resin (silicon cement) fill UL-94V-0 non-flammable. Tinned iron end caps and tinned/solderable leads (welded connection). RoHS/environmental substance compliance noted for the series. Built for continuous 5 W operation at specified ambient with derating above 70 °C. Designed to pass JIS C 5202 reliability tests (solder heat, humidity load life, temperature cycling). Specifications: Parameter Value Product type: Cement (ceramic) power resistor. Rated power: 5 W Nominal resistance: 1.8 kΩ (1,800 Ω) Rated voltage (E = √(P×R)): ≈ 94.87 V (√(5 × 1800) = 94.8683 V) Maximum working voltage (5 W row, Table-1): 750 V Maximum overload voltage (5 W, Table-1): 1,500 V Dielectric withstanding voltage: 1,000 V (AC test value shown in Table-1) Temperature coefficient: Metal-oxide: ±350 ppm/°C; Resistor wire: ±260 ppm/°C Resistance tolerance options: K (±10%), J (±5%), G (±2%) Insulation resistance: ≥ 10^3 MΩ Solderability / solder heat resistance: Solderability ≥95% coverage; solder heat test 350±10 °C for 3±1 s Load life / humidity life tests: Load life: 70±3 °C, 1000 h; Humidity load life: 40±2 °C, 90–95% RH, 1000 h Typical external dims (CR-L style, 5 W): L 22±1.5 mm × W 9.5±1.0 mm × H 9.5±1.0 mm; lead dia Φ 0.68 mm Pinout Diagram: Footprint Diagram: Applications: Power Supply Inrush Current Limiting. LED Driver Current Regulation. Audio Amplifier Load Dummy Load. Voltage Divider for High Power Circuits. Snubber Network for Surge Suppression. Motor Control Dynamic Braking. Heat Generation in Temperature Controlled Systems. Test Equipment as a Calibration Load. Bleeder Resistor for Capacitor Discharge. Power Dissipation in Voltage Reference Circuits. Package Contents: 1x Power Resistor 5W 1.8kΩ Datasheet

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