Electronic Components

RARA RH25 (Non-Inductive) Series Products

	Product name	SKU	Dimensions	Product Type	Power Rating	Minimum Resistance	Maximum Resistance	Tolerance	Temperature Coefficient	Filling Material	Datasheet	Add to enquiry
	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]	Add to Enquiry
	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]	Add to Enquiry
	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	[Download not found]	Add to Enquiry
	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	[Download not found]	Add to Enquiry

Temperature Coefficient is dependent on the resistant range. These are as follows; ±100PPM/°C (0.1Ω – 0.976Ω), ±50PPM/°C (1Ω – 19.6Ω) and ±20PPM/°C (20Ω+).

RH Series Description

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.

• Metal clad wire wound resistor
• Resistance ranges available between 0.1Ω and 50KΩ **
• TCRs of ±40 ppm/°C, ±50 ppm/°C and ±100 ppm/°C ***
• Tolerances of ±0.1%, ±0.25%, ±0.5%, ±1%, ±2% and ±5% available
• 25C Power rating of 20W on a heat sink or 8W in free air
• 50C Power rating of 50W* on a heat sink or 10W in free air
• Insulation resistance of 20MΩ minimum
• Temperature range between -55°C and +250°C
• High stability at conventional power ratings
• Short time overload of 5 x power rating for 5 seconds

_{* 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.

Supporting Manufacturer Information

• RARA Product Brochure