Vishay Sfernice RSSD Wirewound Resistor, Industrial High Power, Vitreous Tubular, Adjustable, Low Values
The Vishay Sfernice RSSD series offers industrial high-power wirewound resistors with vitreous tubular construction, designed for demanding applications. These resistors are characterized by their high power rating, ability to withstand heavy overloads, low ohmic values, and excellent long-term stability. They are suitable for applications requiring robustness against transient conditions, shock, and vibration, and can be tapped using adjustable collars for flexible resistance adjustments. The resistors are fire-proof and possess excellent thermal shock resistance and mechanical strength.
Product Attributes
- Brand: Vishay Sfernice
- Material: Stainless Steel 304 L (collars)
- Construction: Vitreous Tubular
- Features: Adjustable, Fire Proof, High Power Rating, Heavy Overloads, Low Ohmic Values, High Long Term Stability, Excellent Thermal Shock Withstanding, Mechanical Strength
- Certifications: NF F 16101, 10/1988 and 16102, 04/1992: Not applicable
- Material Categorization: Refer to www.vishay.com/doc?99912 for compliance definitions
Technical Specifications
| Model Size | Resistance Range | Rated Power P25 C W | Tolerance % | Approx. Average Unit Weight g |
| RSSD 8 x 34 | 0.12 to 10 | 16 | 5, 10, 20 | 10 |
| RSSD 10 x 50 | 0.12 to 22 | 25 | 5, 10, 20 | 22 |
| RSSD 13 x 70 | 0.12 to 43 | 42 | 5, 10, 20 | 38 |
| RSSD 16 x 94 | 0.33 to 75 | 70 | 5, 10, 20 | 55 |
| RSSD 20 x 117 | 0.22 to 100 | 100 | 5, 10, 20 | 80 |
| RSSD 25 x 138 | 0.10 to 150 | 140 | 5, 10, 20 | 90 |
| RSSD 25 x 168 | 0.12 to 220 | 200 | 5, 10, 20 | 115 |
| RSSD 30 x 250 | 0.22 to 360 | 280 | 5, 10, 20 | 240 |
| RSSD 40 x 370 | 0.47 to 470 | 450 | 5, 10, 20 | 845 |
| RSSD 50 x 373 | 0.68 to 560 | 600 | 5, 10, 20 | 1270 |
Performance Tests
| Test | Conditions | Requirements | Typical Values and Drifts |
| Short Time Overload | 10 Pr during 5 s | 2 % | 1 % |
| Climatic Sequence | -55 C, +200 C, 5 cycles | 3 % | 1 % |
| Thermal Shock | Load at 100 % Pr followed by cold -55 C / 15 min | 2 % or 0.05 | 1 % |
| Load Life | 90 / 30 cycle, 1000 h at Pr at +25 C | 5 % | 5 % |
Environmental Specifications
| Parameter | Value |
| Temperature Range | -55 C to +450 C |
| Climatic Category | -55 C / +200 C / 56 days |
Ordering Information Example
RSSD 10 50 AN 10U 5 % BA25
MODEL STYLE SPECIAL DESIGN Method No Optional Connections OHMIC VALUE TOLERANCE PACKAGING LEAD (Pb)-FREE
2412091029_VISHAY-RSSD25168CR820MB04_C17651200.pdf
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