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| Part Number | RWR78S4990FRB12 | RWR78S4991FRB12 | RWR78S4990FSB12 | RWR78S4990BRB12 | RWR78S4990FPB12 |
|---|---|---|---|---|---|
| Manufacturer | Vishay Dale | Vishay Dale | Vishay Dale | Vishay Dale | Vishay Dale |
| Product Status | Active | Active | Active | Active | Active |
| Resistance | 499 Ohms | 4.99 kOhms | 499 Ohms | 499 Ohms | 499 Ohms |
| Tolerance | ±1% | ±1% | ±1% | ±0.1% | ±1% |
| Power (Watts) | 10W | 10W | 10W | 10W | 10W |
| Composition | Wirewound | Wirewound | Wirewound | Wirewound | Wirewound |
| Features | Military, Moisture Resistant | Military, Moisture Resistant | Military, Moisture Resistant | Military, Moisture Resistant | Military, Moisture Resistant |
| Temperature Coefficient | ±20ppm/°C | ±20ppm/°C | ±20ppm/°C | ±20ppm/°C | ±20ppm/°C |
| Operating Temperature | -55°C ~ 250°C | -55°C ~ 250°C | -55°C ~ 250°C | -55°C ~ 250°C | -55°C ~ 250°C |
| Package / Case | Axial | Axial | Axial | Axial | Axial |
| Supplier Device Package | Axial | Axial | Axial | Axial | Axial |
| Size / Dimension | 0.375" Dia x 1.780" L (9.53mm x 45.21mm) | 0.375" Dia x 1.780" L (9.53mm x 45.21mm) | 0.375" Dia x 1.780" L (9.53mm x 45.21mm) | 0.375" Dia x 1.780" L (9.53mm x 45.21mm) | 0.375" Dia x 1.780" L (9.53mm x 45.21mm) |
| Height - Seated (Max) | - | - | - | - | - |
| Number of Terminations | 2 | 2 | 2 | 2 | 2 |
| Failure Rate | R (0.01%) | R (0.01%) | S (0.001%) | R (0.01%) | P (0.1%) |
