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| Image | Part Number | Manufacturer | Description | Series | Operating Temperature | Packaging | Mounting Type | Current | Accuracy | Termination | Package / Case | Temperature Coefficient |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| B59501A0135A020 | EPCOS | THERMISTOR PTC 33 OHM 20% DISC | - | 5°C ~ 80°C | Tray | Surface Mount | - | - | - | Disc | - | |
| B59841C0135A070 | EPCOS | THERMISTOR PTC 6 OHM 25% DISC | - | -40°C ~ 125°C | Bulk | Through Hole | - | - | - | Disc, 17.5mm Dia x 5.0mm W | - | |
| B59990C0160A070 | EPCOS | THERMISTOR PTC 55 OHM 25% DISC | - | -40°C ~ 125°C | Bulk | Through Hole | - | - | - | Disc, 4.0mm Dia x 3.5mm W | - | |
| TFPT0805L1000FY | Dale / Vishay | THERMISTOR PTC 100 OHM 1% 0805 | TFPT | -55°C ~ 150°C | Tape & Reel (TR) | Surface Mount | - | - | - | 0805 (2012 Metric) | - | |
| B59550T1120A262 | EPCOS | THERMISTOR PTC 50 OHM 15% 4SMD | - | -20°C ~ 125°C | Tape & Reel (TR) | Surface Mount | - | - | - | 4-SMD | - | |
| KTY83/120,113 | NXP Semiconductors / Freescale | THERMISTOR PTC 1K OHM DO34 | KTY83 | -55°C ~ 175°C | Tape & Reel (TR) | Through Hole | - | - | - | DO-204AG, DO-34, Axial | - | |
| B59883C0120A570 | EPCOS | THERMISTOR PTC 120 OHM 20% RAD | - | -40°C ~ 125°C | Bulk | Through Hole | - | - | - | Radial | - | |
| B59721A0070A062 | EPCOS | THERMISTOR PTC 680 OHM 50% 0805 | Automotive, AEC-Q200, B59721 | -40°C ~ 125°C | Tape & Reel (TR) | Surface Mount | - | - | - | 0805 (2012 Metric) | - | |
| PR421D090S701H | Agastat Relays / TE Connectivity | THERMISTOR PTC 70 OHM RECT | - | -40°C ~ 150°C | Bulk | Clamp On | - | - | - | Rectangular | - | |
| PRF18BE471RS5RB | Murata Electronics | THERMISTOR PTC 470 OHM 50% 0603 | POSISTOR® PRF18/21 | -20°C ~ 110°C | Tape & Reel (TR) | Surface Mount | - | - | - | 0603 (1608 Metric) | - |
Positive temperature coefficient (PTC) thermistors are temperature-sensitive resistors whose resistance increases significantly with temperature rise. PTC thermistors are typically made of ceramic materials doped with metal oxides and exhibit a nonlinear resistance-temperature characteristic. They find applications in overcurrent protection, motor starting, temperature sensing, and temperature compensation circuits. PTC thermistors offer self-regulating characteristics, where their resistance increases sharply when the operating temperature exceeds a certain threshold, limiting current flow and providing inherent overcurrent protection. PTC thermistors also find applications in temperature compensation circuits and inrush current limiters, where their resistance changes with temperature variations to control current flow and stabilize operating conditions.