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| PartNumber | PRG21AR420MS1RA | PRG21AR420MB1RA | PRG21AR420MS1RA,HK060356 |
| Description | Thermistors - PTC 42 Ohm 20% 20volts | Thermistors - PTC 42 OHM 20% | |
| Manufacturer | Murata Electronics North America | Murata Electronics North America | - |
| Product Category | PTC Resettable Fuses | PTC Resettable Fuses | - |
| Series | POSISTORR PRG21AR | POSISTORR PRG21AR | - |
| Type | PTC | PTC | - |
| Packaging | Tape & Reel (TR) | Digi-ReelR Alternate Packaging | - |
| Termination Style | SMD/SMT | SMD/SMT | - |
| Qualification | Commercial | - | - |
| Operating Temperature Range | - 40 C to + 150 C | - 40 C to + 105 C | - |
| Package Case | 0805 (2012 Metric) | 0805 (2012 Metric) | - |
| Tolerance | 20 % | 20 % | - |
| Current Max | 590mA | 590mA | - |
| Voltage | 20 V | - | - |
| Current Hold Ih Max | 54mA | 54mA | - |
| Voltage Max | 20V | 20V | - |
| Current Trip It | 102mA | 102mA | - |
| R Min Max | - | - | - |
| Time to Trip | - | - | - |
| Resistance | 42 Ohms | 42 Ohms | - |
| Unit Weight | - | 0.000141 oz | - |