Non-inductive winding + thermal-absorption effect for outstanding reliability
Available in non-inductive styles with Ayrton-Perry winding for minimum reactance; mounts on chassis to utilize heat-sink effect. Provides excellentreliable .
Dimensions
Dimensions (mm)| Model — Part No. | Length L (mm) | Width W (mm) | Height H (mm) | terminal Size |
|---|---|---|---|---|
| RX24-5W | 15 | 17 | 9 | 0.6 Straight Lead |
| RX24-10W | 19 | 23 | 10 | 1.6 Hole Lead |
| RX24-25W | 28 | 27 | 15 | 2.0 hole-lead |
| RX24-35W | 34 | 29 | 15 | 2.0 hole-lead |
| RX24-50W | 50 | 29 | 15 | 2.0 hole-lead |
| RX24-75WM | 60 | 29 | 15 | 2.0 hole-lead |
| RX24-80W | 75 | 29 | 15 | 2.0 hole-lead |
| RX24-100WM | 70 | 29 | 15 | 2.0 hole-lead |
| RX24-100WS | 60 | 22 | 15 | 2.0 hole-lead |
| RX24-75W | 66 | 48 | 26 | M4 |
| RX24-100W | 98 | 48 | 26 | M4 |
| RX24-150W | 136 | 48 | 26 | M4 |
| RX24-200W | 155 | 48 | 26 | M4 |
| RX24-200WL | 92 | 73 | 45 | M8 |
| RX24-250W | 112 | 73 | 45 | M8 |
| RX24-300W | 128 | 73 | 45 | M8 |
| RX24-500W | 200 | 73 | 45 | M8 |
| RX24-800W | 250 | 73 | 45 | M8 |
| RX24-1000W | 300 | 73 | 45 | M8 |
Rated Power Derating Curve
Rated Power Derating CurveElectrical Characteristics
Testing Method & Condition| Test Item | Test Condition | Performance |
|---|---|---|
| TCR Temperature Coefficient | Measure resistance at room temperature and at room temperature +100°C, then calculate resistance change per °C | ±300 ppm/℃ |
| Short Time Overload | Apply voltage corresponding to 10× rated power (√10PR) or maximum operating voltage (whichever is lower) for 5 seconds | ΔR ≤ ±(2%R0+0.05Ω) |
| Resistance to Soldering Heat | Dip in solder bath at 350±10°C for 2~3 seconds | ΔR ≤ ±(1%R0+0.05Ω) |
| Solderability | Dip in solder bath at 260±5°C for 2~3 seconds | Solder coverage ≥95% |
| Temperature Cycling | 30 min at -55°C → 10~15 min at +25°C → 30 min at +275°C, 5 cycles | ΔR ≤ ±(1%R0+0.05Ω) |
| Load Life in Humidity | 40±2°C and 90~95% RH chamber; apply rated or maximum operating voltage for 1000h (1.5h ON / 0.5h OFF) | ΔR ≤ ±(5%R0+0.05Ω) |
| Load Life in Heat | 70±2°C chamber; apply rated or maximum operating voltage for 1000h (1.5h ON / 0.5h OFF) | ΔR ≤ ±(5%R0+0.05Ω) |
| terminal Strength | Pull: 10N | ΔR ≤ ±(2%R0+0.1Ω) |
| Vibration | Frequency 10~55Hz, amplitude 0.75mm, 6 hours | ΔR ≤ ±(2%R0+0.1Ω) |
| Nonflammability | Apply 5×, 10×, 16× rated power AC load for 5 minutes | No visible flame |
Heatsink Metal Resistor
Heatsink metal resistor is a high‑power wirewound resistor with built‑in integrated heatsink metal structure, manufactured by Guangdong Qingda Electronic Technology Co., Ltd. Different from ordinary power resistors, this series combines resistive winding unit and metal heat‑sink housing into one assembly. It transfers internal heat rapidly outwards to reduce temperature rise during continuous heavy‑duty operation.
High‑temperature alloy resistance wire and high‑thermal‑conductivity inorganic insulation filler are applied inside. The integral metal heatsink structure greatly improves thermal exchange efficiency, avoids over‑heating failure under long‑term load or pulse overload. Robust metal construction brings excellent vibration resistance, dust‑proof and moisture‑proof capability, adapting to complex industrial working conditions. Pre‑drilled mounting points support easy installation onto chassis or cooling assemblies.
Key Features
‑ Integrated metal heatsink structure, superior heat dissipation efficiency ‑ High power handling capacity, excellent overload withstand performance ‑ Fast thermal conduction, low temperature rise under continuous load ‑ Solid metal housing, anti‑shock and anti‑vibration ‑ Dust‑proof, moisture‑proof for harsh industrial environments ‑ Stable resistance value, low thermal drift, long service life ‑ Convenient mechanical mounting for equipment integration ‑ Custom resistance, power rating and outline dimensions supported
Applications
Inverter braking systems, servo motor energy discharge, elevator drive systems, new‑energy power equipment, battery discharge testing, power load banks, industrial power control, high‑heat cabinet equipment.