Description
Overview
This 300W inverter startup protection resistor is designed for smooth motor drive initialization. With its 50Ω resistance and robust aluminum casing, it offers efficient heat dissipation and reliable performance in harsh environments. Engineers widely use this resistor to protect inverters from inrush current during startup.
🔧 Features
- Rated power: 300W, resistance: 50Ω
- Limits inrush current during inverter startup
- Aluminum housing for efficient heat dissipation
- High overload capacity and stable performance
- Flame-retardant and RoHS compliant
- Custom resistance and size available
Aluminum resistor used in inverter startup circuits
Dimension 
VFD Power vs. Braking Resistor Power Selection Table (General Reference)
| VFD Power (kW) | Recommended Resistor Power (W) | Recommended Resistance (Ω) | Notes |
|---|---|---|---|
| 0.75 kW | 100–200 W | 100–150 Ω | Light-duty, fans |
| 1.5 kW | 200–400 W | 75–100 Ω | – |
| 2.2 kW | 300–600 W | 60–80 Ω | Standard braking |
| 3.7 kW | 600–800 W | 40–60 Ω | – |
| 5.5 kW | 800–1000 W | 30–50 Ω | Common industrial use |
| 7.5 kW | 1.0–1.5 kW | 20–40 Ω | – |
| 11 kW | 1.5–2.0 kW | 15–25 Ω | – |
| 15 kW | 2.0–3.0 kW | 10–20 Ω | – |
| 18.5 kW | 3.0–4.0 kW | 8–15 Ω | Heavy-duty applications |
| 22–30 kW | 4.0–6.0 kW | 6–10 Ω | Large equipment |
| 37–45 kW | 6.0–8.0 kW | 4–8 Ω | Cranes, hoists |
| ≥55 kW | ≥10 kW | 2–5 Ω | May use multiple resistors in parallel |
Applications of Inverter Startup Protection Resistors
- Motor drives and servo systems
- HVAC and elevator control panels
- Industrial inverter soft-start circuits
Why Choose Our Inverter Startup Protection Resistor?
- 300W power rating with 50Ω fixed resistance
- Aluminum housing for superior heat dissipation
- Customizable lead length and mounting style
Learn more about inverter protection standards.
Check out our full range of Aluminum Housed Inrush Current Resistors for more options tailored to inverter startup protection and motor drive systems.
