SQP CR-L Ceramic Cement Resistor 20W 1000 Ohm 5% Tolerance for Charger Aging and Power Supply Circuits
Price:
0.25~0.3 USD/PC
MOQ:
5000PCS
Delivery Time:
10 workdays
Brand:
AMPFORT
Product Description
SQP CR-L Ceramic Cement Resistor 20W 1000 Ohm 5%
This industrial-grade ceramic cased cement resistor delivers reliable 20W power handling with 1000Ω resistance and ±5% tolerance. Designed specifically for demanding applications like charger aging tests, power supply current limiting, and motor starting circuits.
What Are Cement Resistors?
Despite the name, cement resistors contain no actual cement. The term refers to their construction method where resistance elements (wirewound or metal oxide film) are encapsulated in ceramic shells with special non-flammable, heat-resistant filler materials. These components feature excellent thermal conductivity and robust mechanical protection.
20W Model Specifications
| Parameter | Value |
|---|---|
| Power Rating | 20W |
| Resistance | 1000Ω |
| Tolerance | ±5% |
| Dimensions (L×W×H) | 63±1.5mm × 13±1.5mm × 13±1.5mm |
| Lead Diameter | Φ0.68±0.05mm |
| Resistance Range | 1Ω-600Ω (Wire Wound) / 620Ω-100KΩ (Metal Oxide Film) |
Construction Details
| Component | Material |
|---|---|
| Ceramic Core | High alumina ceramic |
| Resistor Element | Metal oxide film or resistance wire |
| Terminal | Tinned iron cap |
| Connection | Solder-plated lead wire welded to caps |
| Filler Material | Silicon resin (UL-94V-0 nonflammable) |
| Ceramic Case | High thermal conductivity material |
Key Features
- Excellent shock, moisture, and heat resistance with superior heat dissipation
- Complete insulation suitable for printed circuit board mounting
- Precision wire winding for accurate resistance values and extended lifespan
- Metal oxide film construction for high resistance values
- Low temperature coefficient with linear resistance change
- Short-time overload capability with minimal noise and long-term stability
- Explosion-proof design with comprehensive protection
Functional Applications
- Power supply current limiting in +300V circuits
- Starting resistance in power supply circuits
- Peak pulse absorption between power switch tubes
- Current protection circuits in ground connections
Industry Applications
Widely used in power adapters, audio equipment, audio frequency dividers, instruments, meters, televisions, automotive systems, and charger aging test equipment. Ideal for high-power applications including air conditioners, televisions, and other appliances above 100 watts.
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Get in Touch
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Company
Dongguan Ampfort Electronics Co., Ltd.
Location
Floor 5,Changlong Industrial Building,No.6,Jiangnan Road,Jingshan,Chashan Town,Dongguan 523323,China
Contact Person
Annie Fang