5 Ohm CR MOF Cylindrical Cement Resistor 100W Wire Wound with UL 94 V-0 Certification and 350V-15000V Voltage Range
Price:
Contact sales
MOQ:
1000 Pieces
Delivery Time:
7-10 Workdays
Brand:
AMPFORT
Product Description
Cement Resistor Overview
Cement resistors are high-power wire wound resistors encapsulated in refractory cement material, designed for demanding industrial applications requiring robust performance and reliability.
Applications
- Instrumentation and measurement systems
- Audio systems and frequency dividers
- Automotive electronics and power supplies
- Industrial control systems and white goods
- Pre-charged applications and motor current limiting
Key Features
- Ceramic casing with high thermal conductivity
- Non-flammable coating conforming to UL 94 V-0
- Excellent pulse load capability and long-term stability
- Low noise operation and instant overload capability
- Small linear temperature coefficient
- Non-inductive (NI) version available
Performance Specifications
| Rated Power | Max Working Voltage | Max Overload Voltage | Dielectric Withstanding Voltage | Max Intermittent Overload Voltage |
|---|---|---|---|---|
| 1W | 350V | 700V | 1000V | 1500V |
| 2W | 350V | 700V | 1000V | 1500V |
| 3W | 500V | 1000V | 1000V | 1500V |
| 5W | 750V | 1500V | 1000V | 1500V |
| 7W | 1000V | 1500V | 1000V | 1500V |
| 10W | 1000V | 1500V | 1000V | 1500V |
| 15W | 1000V | 15000V | 1000V | 1500V |
| 20W | 1000V | 1500V | 1000V | 1500V |
| 30W | 1000V | 1500V | 1000V | 1500V |
| 40W | 1000V | 1500V | 1000V | 1500V |
Construction Materials
| Component | Material |
|---|---|
| Ceramic Core | High alumina ceramic |
| Resistor Element | Metal oxide film or resistance wire |
| Terminal | Tinned iron cap |
| Connection | Soldered or tinned annealed wire |
| Silicon Cement | Silicon resin (UL-94V-0 compliant) |
| Ceramic Case | High thermal conductivity material |
Technical Characteristics
| Parameter | Performance | Test Standard |
|---|---|---|
| Temperature Coefficient | Metal Oxide Film: ±350PPM/℃, Resistor Wire: ±260PPM/℃ | JIS C 5202 Section 5.2 |
| Short Time Overload | Within ±(2%+0.05Ω), no mechanical damage | Rated power × 10 times, 5s duration |
| Insulation Resistance | 103MΩ or more | DC 500V for 60 seconds |
| Dielectric Withstanding Voltage | No flashover, mechanical damage, arcing or insulation breakdown | AC potential for 60 seconds |
| Pulse Overload | Within ±(2%+0.05Ω) | Rated voltage × 4 times, 10000 cycles |
Construction Diagram
Power Derating Curve
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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