The EAK Discharge Resistor is a high-performance, durable resistor designed for specialized electrical applications. It offers excellent thermal and mechanical stability, making it ideal for use in demanding environments such as industrial systems, power electronics, and high-voltage equipment.
Key Features & Specifications
1. Electrical Characteristics
- Resistance Range : 0.04 Ω to 100 Ω (±10% tolerance), with some values available beyond this range depending on diameter.
- Temperature Coefficient of Resistance (TCR) : -0.08% to -0.03% per °C, ensuring stable resistance across temperature fluctuations.
- Resistance Stability Over Time : ±3% maximum deviation after 6 months of normal storage.
- Resistance Change Under Impulse : Less than ±3% after exposure to two lightning impulse waves (1.2/50 μs) at 23.5 kV peak voltage (20.5 kV for diameters ≤50 mm).
2. Physical & Mechanical Properties
- Dimensions :
- Outer Diameter: Available from 48 mm up to 151 mm (±1 mm).
- Inner Diameter: Ranges from 0 mm to 41 mm, depending on model.
- Thickness: 10 mm to 25.3 mm.
- Density : 2.2–2.4 g/cm³.
- Thermal Expansion Coefficient : 4.5–6 × 10⁻⁶ /°C.
- Thermal Conductivity : 1.22 W/(m·K).
- Specific Heat Capacity : 745 J/(kg·K).
- Surface Flatness :
- Finished product: ≤ 0.05 mm (5丝).
- Blank disc: ≤ 0.01 mm (1丝).
3. Thermal Performance
- Rated Power : 22W at 25°C ambient temperature.
- Maximum Temperature Rise : ≤220K under full load.
- Operating Temperature Range : -40°C to 125°C.
- Storage Temperature Range : -55°C to 80°C.
- Maximum Operating Temperature : Up to 220°C.
4. Insulation & Dielectric Strength
- Insulation Resistance : ≥2000 MΩ at DC 1000V.
- Impulse Voltage Test : Withstands 23.5 kV (or 20.5 kV for diameters ≤50 mm) lightning impulse (1.2/50 μs) twice without significant resistance change.
5. Environmental Compliance
- Relative Humidity Tolerance : ≤90% RH.
- Altitude Limitation : Suitable for installations up to 2500 meters.
- Atmospheric Pressure Range : 86 kPa to 106 kPa.
- Corrosion-Free Storage Required : Must be stored in non-corrosive environments.
- Packaging Protection : Individual units are plastic-bagged and paper-wrapped; bulk orders packed in wooden crates.
Installation & Usage Guidelines
- Mounting Torque :
- Standard torque: 15–25 N.
- For 10 mm thickness: Max 25 N.
- For 25 mm thickness: Max 35 N.
- Cooling Considerations :
- Not suitable for continuous impulse loading.
- For frequent intermittent pulses, recommend additional cooling methods such as heat sinks, air cooling, or water cooling to maintain optimal operating temperatures.
- Pre-Use Conditioning :
- If stored long-term, bake at 100–130°C for at least 8 hours before use to remove moisture and restore performance.
Applications
The EAK Discharge Resistor is commonly used in:
- High-voltage discharge circuits
- Surge protection systems
- Energy absorption modules
- Industrial machinery requiring transient energy dissipation
Its robust construction, combined with precise resistance control and high thermal endurance, makes it an essential component in safety-critical and high-reliability systems.
Quality Assurance & Identification
Each unit is marked with:
- Manufacturer’s initials
- Model number
- Batch number
All markings remain legible after standard testing procedures. Packaging ensures safe transport and storage, preventing environmental damage.
Conclusion
The EAK Discharge Resistor delivers reliable performance under extreme conditions, offering precision resistance values, high thermal tolerance, and strong dielectric strength. Its versatile dimensions and compatibility with various cooling solutions make it adaptable to a wide range of technical applications. Whether used in surge suppression or energy management systems, the EAK series stands out as a dependable and high-quality solution for modern electrical engineering needs.
