When it comes to high-power, high-reliability resistive components in industrial, automotive, and energy systems, thick film power resistors stand out as the preferred choice for engineers seeking precision, durability, and thermal stability. Designed for applications that demand robust performance under extreme conditions, our thick film power resistors offer exceptional power handling, low parasitic inductance, and high insulation voltage — making them ideal for critical circuits where failure is not an option.
Key Specifications of Our Thick Film Power Resistors
Our advanced thick film power resistor series delivers industry-leading performance across a wide range of operating parameters:
- Power Rating: 100W to 250W — engineered to handle substantial continuous and pulse power loads without degradation.
- Resistance Range: From ultra-low 0.1Ω to ultra-high 100MΩ — offering flexibility for virtually any circuit design requirement.
- Parasitic Inductance: Less than 40nH — ensuring minimal interference in high-frequency or fast-switching applications such as inverters, motor drives, and SMPS systems.
- Insulation Withstand Voltage: Up to 4KVrms — providing superior electrical isolation and safety in high-voltage environments like EV battery management, solar inverters, and industrial automation.
These specifications make our thick film resistors suitable for use in harsh environments — from aerospace and defense to renewable energy and electric vehicle charging infrastructure.
Primary Applications: Fixed Discharge Resistor, Voltage Equalizing Resistor, Charging Resistor
Our thick film power resistors are specifically optimized for three core applications, each requiring precise resistance control and high reliability:
1. Fixed Discharge Resistor
Used primarily in capacitor discharge circuits, these resistors safely dissipate stored energy after system shutdown. Commonly found in DC-link circuits of variable frequency drives (VFDs), UPS systems, and EV battery packs, they ensure rapid and controlled discharge to protect downstream components and personnel. Their stable resistance value and high power dissipation capability make them indispensable in safety-critical applications.
2. Voltage Equalizing Resistor
In high-voltage series-connected capacitor banks or IGBT modules, voltage imbalance can lead to premature component failure. Our thick film equalizing resistors provide consistent voltage sharing across multiple devices, ensuring uniform stress distribution and prolonged system life. With their tight tolerance and low inductance, they are perfect for high-reliability power electronics such as HVDC transmission and traction converters.
3. Charging Resistor
Critical in limiting inrush current during startup phases of power supplies, battery chargers, and motor controllers, our charging resistors protect sensitive components from surge damage. Engineered with high thermal mass and excellent pulse-handling capability, they allow safe ramp-up of voltage while minimizing stress on capacitors and switches. Ideal for EV onboard chargers, server PSUs, and industrial motor starters.
Why Choose Thick Film Power Resistors?
Unlike wirewound or metal film alternatives, thick film technology offers a unique combination of advantages:
- Superior Thermal Stability: Thick film resistors maintain consistent resistance values even under repeated thermal cycling, thanks to their ceramic substrate and laser-trimmed resistive layer.
- Low Inductance Design: The non-inductive structure minimizes electromagnetic interference (EMI), making them suitable for high-speed switching applications.
- Compact Form Factor: Despite their high power ratings, these resistors are available in compact, surface-mount or chassis-mount packages — saving valuable PCB space and simplifying thermal management.
- Long-Term Reliability: Rigorous testing ensures compliance with international standards (IEC, MIL-STD, AEC-Q200), guaranteeing performance over decades of operation.
Industries Served
Our thick film power resistors are trusted by leading manufacturers in:
- Electric Vehicles & Battery Management Systems (BMS)
- Renewable Energy (Solar Inverters, Wind Turbine Converters)
- Industrial Automation & Motor Drives
- Uninterruptible Power Supplies (UPS) & Telecom Power
- Medical Equipment & Test Instruments
Whether you’re designing a next-generation EV charger, a high-efficiency solar inverter, or a mission-critical industrial controller, our thick film power resistors deliver the performance, reliability, and scalability your project demands.
Conclusion
As a global supplier of high-performance passive components, we specialize in thick film power resistors engineered for the most demanding applications — including fixed discharge resistors, voltage equalizing resistors, and charging resistors. With power ratings up to 250W, resistance ranges spanning 0.1Ω to 100MΩ, and insulation withstand voltages reaching 4KVrms, our products are built to exceed expectations in both performance and longevity.
Partner with us to enhance your system’s reliability, safety, and efficiency — because when every watt matters, only the best will do.
