The RH series from RARA are metal clad wirewound resistors with an aluminium housing covering cement moulding. These resistors offers a power rating from 20W up to 50W* on a suitable heat sink and 8W or 10W in free air depending on the model. The resistance range varies depending on the model and inductivity. These range from 0.1kΩ to 50KΩ. Full details can be found on the individual product pages. These high power resistors are available with tolerances of ±0.1% (>1Ω), ±0.25% (>0.4Ω), ±0.5% (>0.2Ω), ±1% (>0.1Ω), ±2% (>0.05Ω) and ±5% (>0.02Ω). All RH resistors have an operating temperature of -55°C to +250°C. Derating is required for reduced chassis mounting area and for high ambient temperatures.
* 30W on heat sink (178x127x51x1mm), 50W on heat sink (305x305x2mm)
** Exact ranges as per the product pages for each model.
*** ±20 ppm/°C is available upon request
RARA Electronics Corporation is a renowned manufacturer specialising in industrial and braking resistors. They provide high-quality, durable resistors for various industrial applications, including power generation, transport, and renewable energy sectors, ensuring reliability and efficiency in demanding operational environments. Their products are known for performance and customisation options. Please visit www.raraohm.com for more information.
| Weight | 35 kg |
|---|---|
| Dimensions | 16.00 x 29.60 x 70.8mm |
| Product Type | |
| Series / Model | |
| Power Rating | |
| Filling Material | Cement |
| Minimum Resistance | 0.68Ω |
| Maximum Resistance | 50kΩ |
| Tolerance | |
| Temperature Coefficient | |
| Inductive or Non Inductive | Inductive |
RH50
(blank) Inductive
Resistance value expressed in ohms, for example 220.5Ω or 25KΩ.
| SKU | Resistance Value | Tolerance |
|---|---|---|
| RH25-1-2-1 | Custom (0.68Ω - 1Ω) | ±0.1% |
| RH25-1-2-1 | Custom (0.68Ω - 1Ω) | ±0.25% |
| RH25-1-2-1 | Custom (0.68Ω - 1Ω) | ±0.5% |
| RH25-1-2-1 | Custom (0.68Ω - 1Ω) | ±1% |
| RH25-1-2-1 | Custom (0.68Ω - 1Ω) | ±2% |
| RH25-1-2-1 | Custom (0.68Ω - 1Ω) | ±5% |
| RH25-1-2-1 | Custom (1Ω - 10kΩ) | ±0.1% |
| RH25-1-2-1 | Custom (1Ω - 10kΩ) | ±0.25% |
| RH25-1-2-1 | Custom (1Ω - 10kΩ) | ±0.5% |
| RH25-1-2-1 | Custom (1Ω - 10kΩ) | ±1% |
| RH25-1-2-1 | Custom (1Ω - 10kΩ) | ±2% |
| RH25-1-2-1 | Custom (1Ω - 10kΩ) | ±5% |
| RH25-1-2-1 | Custom (10kΩ – 20kΩ) | ±0.1% |
| RH25-1-2-1 | Custom (10kΩ – 20kΩ) | ±0.25% |
| RH25-1-2-1 | Custom (10kΩ – 20kΩ) | ±0.5% |
| RH25-1-2-1 | Custom (10kΩ – 20kΩ) | ±1% |
| RH25-1-2-1 | Custom (10kΩ – 20kΩ) | ±2% |
| RH25-1-2-1 | Custom (10kΩ – 20kΩ) | ±5% |
| RH25-1-2-1 | Custom (20kΩ - 50kΩ) | ±0.1% |
| RH25-1-2-1 | Custom (20kΩ - 50kΩ) | ±0.25% |
| RH25-1-2-1 | Custom (20kΩ - 50kΩ) | ±0.5% |
| RH25-1-2-1 | Custom (20kΩ - 50kΩ) | ±1% |
| RH25-1-2-1 | Custom (20kΩ - 50kΩ) | ±2% |
| RH25-1-2-1 | Custom (20kΩ - 50kΩ) | ±5% |
| Product name | SKU | Dimensions | Product Type | Power Rating | Minimum Resistance | Maximum Resistance | Tolerance | Temperature Coefficient | Filling Material | Datasheet | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RARA RH25 (Inductive) | RH25-1-1 | 16.00 x 29.60 x 49.40mm | Wirewound, Resistor | 8W, 20W | 0.27Ω | 25kΩ | ±0.1%, ±0.25%, ±0.5%, ±1%, ±2%, ±5% | ±40 ppm/°C, ±50 ppm/°C, ±100 ppm/°C | Cement | [Download not found] | View Product |
|
| RARA RH25 (Non-Inductive) | RH25-1 | 16.00 x 29.60 x 49.40mm | Wirewound, Resistor | 8W, 20W | 0.1Ω | 10kΩ | ±0.1%, ±0.25%, ±0.5%, ±1%, ±2%, ±5% | ±40 ppm/°C, ±50 ppm/°C, ±100 ppm/°C | Cement | [Download not found] | View Product |
|
| RARA RH50 (Inductive) | RH25-1-2-1 | 16.00 x 29.60 x 70.8mm | Wirewound, Shunt, Resistor | 10W, 30W, 50W | 0.68Ω | 50kΩ | ±0.1%, ±0.25%, ±0.5%, ±1%, ±2%, ±5% | ±40 ppm/°C, ±50 ppm/°C, ±100 ppm/°C | Cement | View Product | |
|
| RARA RH50 (Non-Inductive) | RH25-1-2 | 16.00 x 29.60 x 70.8mm | Wirewound, Resistor | 10W, 30W, 50W | 0.2Ω | 20kΩ | ±0.1%, ±0.25%, ±0.5%, ±1%, ±2%, ±5% | ±40 ppm/°C, ±50 ppm/°C, ±100 ppm/°C | Cement | View Product |
Temperature Coefficient is dependent on the resistant range. These are as follows; ±100PPM/°C (0.2Ω – 0.976Ω), ±50PPM/°C (1Ω – 19.6Ω) and ±20PPM/°C (20Ω+).
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