Product Description
The Vishay Sfernice RSSD series are industrial high-power, vitreous tubular, adjustable wirewound resistors designed for demanding applications. They offer high power ratings from 16 W to 600 W at 25 C, with excellent capability to withstand heavy overloads (10 Pn for 5 s with < 1 % drift). These resistors are suitable for applications requiring low ohmic values (down to 0.10 ) and exhibit high long-term stability with drift < 1.5 % after 1000 hours. They are known for their excellent thermal shock resistance, mechanical strength, and fire-proof properties. The RSSD series complements existing Vishay styles in the low-value area and can be tapped using adjustable collars for flexible resistance adjustments. Standard models feature a single adjustable collar.
Product Attributes
- Brand: Vishay Sfernice
- Material: Stainless Steel 304 L (collars)
- Certifications: NF F 16101, 10/1988 and 16102, 04/1992 (Not applicable)
- Material Categorization: Refer to www.vishay.com/doc?99912 for definitions of compliance.
Technical Specifications
| Model Size | Resistance Range () | Rated Power P25C (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 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 %) |
| Model Size | Power Rating at 25 C Continuous (W) | Resistance Ohmic Range (E12, E24 Series) with 1 Tapping () | Maximum Number of Additional Tapping | Reduction % of Ohmic Value by Tapping |
| RSSD 8 x 34 | 16 W | 0.12 to 10 | 0 | 23 |
| RSSD 10 x 50 | 25 W | 0.12 to 22 | 1 | 21 |
| RSSD 13 x 70 | 42 W | 0.12 to 43 | 1 | 14 |
| RSSD 16 x 94 | 70 W | 0.33 to 75 | 1 | 11 |
| RSSD 20 x 117 | 100 W | 0.22 to 100 | 1 | 10 |
| RSSD 25 x 138 | 140 W | 0.10 to 150 | 1 | 8 |
| RSSD 25 x 168 | 200 W | 0.12 to 220 | 2 | 6.5 |
| RSSD 30 x 250 | 280 W | 0.22 to 360 | 2 | 6 |
| RSSD 40 x 370 | 450 W | 0.47 to 470 | 4 | 5.7 |
| RSSD 50 x 373 | 600 W | 0.68 to 560 | 4 | 5.7 |
2412091029_VISHAY-RSSD16X94A3R30KB19_C17696301.pdf
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