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ARCOL HS300 25R J
ARCOL HS300 25R J Aluminum Housed Power Resistor – 300W, 25Ω, ±5%, MIL-R-18546
The ARCOL HS300 25R J is a high-power aluminum housed wirewound resistor designed for demanding industrial, power control, and braking applications. Rated at 300 watts when mounted on a standard heatsink, this resistor offers excellent thermal performance, high voltage capability, and mechanical durability. Built to MIL-R-18546 style specifications, the HS300 series is ideal for use in environments requiring reliable power dissipation, low inductance options, and stable resistance over temperature.
| Specification | Value |
|---|---|
| Manufacturer | ARCOL |
| Series | HS300 |
| Part Number | HS300 25R J |
| Resistor Type | Aluminum housed wirewound |
| Military Style | MIL-R-18546 |
| Resistance Value | 25 Ω |
| Resistance Tolerance | ±5% (J) |
| Power Rating (with heatsink @ 25°C) | 300 W |
| Power Rating (no heatsink @ 25°C) | 60 W |
| Resistance Range | R01 to 68K |
| Limiting Element Voltage | 2500 V |
| Voltage Proof (AC RMS) | 7070 V |
| Peak Voltage Proof (AC) | 5000 V |
| Approximate Weight | 700 g |
| Insulation Resistance | ≥ 10,000 MΩ |
| Temperature Coefficient | <1K: 100 ppm/°C, >1K: 25 ppm/°C |
| Operating Temperature (Derating) | Linear derating to zero at 200°C |
| Inductance | Low inductive (NHS option available) |
| Feature | Benefit |
|---|---|
| 300W Power Rating (Heatsink Mounted) | Handles high energy dissipation reliably |
| Aluminum Housed Construction | Efficient heat transfer and mechanical robustness |
| MIL-R-18546 Style | Suitable for defense and industrial-grade applications |
| Wide Resistance Range | Flexible use across control and power circuits |
| High Voltage Capability | Safe operation in high-voltage environments |
| Low Inductive Option (NHS) | Ideal for fast-switching and pulse applications |
| Multiple Tolerance Options | Supports precision and general-purpose designs |
| High Insulation Resistance | Enhanced safety and long-term stability |
Applications: Dynamic braking systems, motor drives, power supplies, load banks, industrial controls, inverters, servo systems, test equipment, traction systems, power conversion equipment