Power Resistor 30W 10Ω
The 30 W, 10 Ω cement-type power resistor features a high-alumina ceramic core enclosed within a cement-coated ceramic body that provides mechanical protection and thermal stability. The resistive element may be realized as a metal-oxide film or a resistance wire, embedded and sealed with silicone-based cement to resist moisture and improve heat transfer. Termination is provided by welded tinned iron end caps with solderable leads, offering a secure electrical connection for through-hole mounting or wired assemblies.
Rated for continuous 30 W dissipation, this resistor’s nominal electrical behavior follows the defined power and resistance relationship; its rated voltage is √(P×R) approximately 17.32 V for the 10 Ω value. The part is designed to operate continuously at the rated ambient with a manufacturer-specified derating curve as temperature rises, and it tolerates short-duration overloads and pulse stresses within the limits set by the specification, maintaining stable resistance under both steady-state and transient thermal loading.
Constructed to meet common industrial reliability tests, the component passes solderability and solder-heat checks, dielectric and insulation testing, temperature cycling, humidity load-life and extended load-life trials. The cement sealing and ceramic casing minimize moisture ingress and mechanical stress, reducing long-term drift. These qualities make the resistor suitable where predictable dissipation, long-term stability, and flame-resistant housing are required.
Features:
- Cement-coated ceramic housing with high-alumina core.
- Metal-oxide film or resistance-wire element options.
- Silicone/silicon-cement sealing (flame-resistant).
- Welded tinned iron end caps with solderable leads.
- Continuous 30 W rating with derating for elevated ambient temperature.
- Designed to meet standard reliability tests (solder heat, humidity, load life).
| Parameter | Value |
|---|---|
| Product type: | Cement (ceramic) power resistor |
| Rated power: | 30 W |
| Nominal resistance: | 10 Ω |
| Rated voltage (E = √(P×R)): | ≈ 17.32 V |
| Maximum working voltage: | 1,000 V |
| Maximum overload voltage: | 1,500 V |
| Dielectric withstanding voltage: | 1,000 V |
| Temperature coefficient: | Metal-oxide: ±350 ppm/°C; Resistance wire: ±260 ppm/°C |
| Resistance tolerance options: | K (±10%), J (±5%), G (±2%) |
| Insulation resistance: | ≥ 10³ 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): | L 75±2.0 mm × W 19±2.0 mm × H 17±2.0 mm; lead dia Φ 0.68 mm |
Applications:
- Power control circuits.
- Load testing / dummy loads.
- Motor drive braking and discharge networks.
- Industrial automation equipment.
- Power supplies and inverter systems.
Package Contents:
- 1x Power Resistor 30W 10Ω
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