Overview
The Arcol HS300 75R F is a 300-watt aluminum housed wirewound power resistor rated for 75 ohms at ±5% tolerance. From Arcol/Ohmite, the HS300 75R F is an HS series 300W aluminium housed resistor. Manufactured in line with the requirements of MIL 18546 and IEC 115, designed for direct heatsink mounting with thermal compound to achieve maximum performance. This industrial-grade component is engineered for demanding applications requiring stable, linear power dissipation across wide temperature ranges.
Key Features
- 300W power rating with aluminum housing for efficient heat dissipation
- Wire wound design maximizes high pulse characteristics; power dissipates linearly to zero, even at high ambient temperatures.
- ±5% tolerance with excellent stability and linearity
- Optimized for braking resistor, inrush limiter, inverter/converter, snubber and balancing resistor applications.
- RoHS compliant and manufactured to military specifications
- Chassis/heatsink mount configuration with soldering termination
Technical Specifications
The HS300 75R F delivers predictable thermal performance in fixed-resistor applications. All values verified against manufacturer datasheet and distributor specifications.
Typical Applications
The Arcol HS300 75R F is widely deployed in industrial automation and power electronics:
- Dynamic braking resistors for motors and servo drives
- Inrush current limiters in power distribution systems
- Inverter and converter snubber networks
- Load balancing and voltage divider circuits
- PLC motion control and variable frequency drive (VFD) cabinets
Compatibility & Replacements
Compatible With
- Allen-Bradley and Rockwell Automation drive cabinets
- Siemens SINAMICS and S120 servo drives
- Mitsubishi Freqrol and FR-E series inverters
- Omron 3G3MX and MX2 VFD systems
- Any heatsink-mounted DC/AC power application requiring 300W dissipation
- Systems conforming to IEC 115 and MIL-18546 standards
Replaces / Drop-In Replacement For
- Arcol HS300 75R J (same resistance, different tolerance code)
- Ohmite HS300 75R F (Ohmite acquired Arcol brand; electrically identical)
- Other 75-ohm 300W aluminum housed wirewound resistors with equivalent thermal characteristics
Works With
- Standard aluminum or copper heatsinks with thermal compound
- DC power supplies and rectifier circuits (up to 2.5kVdc)
- AC/AC snubber and damping networks (5kVac dielectric strength)
- PWM inverter braking circuits requiring precision load resistance
- Industrial control systems and automation platforms compatible with chassis-mount components
