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| Image | Part Number | Manufacturer | Description | Series | Operating Temperature | Packaging | Mounting Type | Current | Accuracy | Termination | Package / Case | Temperature Coefficient |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| B59421A0135A062 | EPCOS | THERMISTOR PTC 470 OHM 50% 0402 | Automotive, AEC-Q200, B59421 | -40°C ~ 125°C | Original-Reel® | Surface Mount | - | - | - | 0402 (1005 Metric) | - | |
| PRF21BE471QB5RA | Murata Electronics | THERMISTOR PTC 470 OHM 50% 0805 | POSISTOR® PRF18/21 | -20°C ~ 100°C | Original-Reel® | Surface Mount | - | - | - | 0805 (2012 Metric) | - | |
| P5010D090S401H | Agastat Relays / TE Connectivity | THERMISTOR PTC 40 OHM COIN | - | -40°C ~ 150°C | Bulk | Clamp On | - | - | - | Coin | - | |
| TFPT0805L3300FM | Dale / Vishay | THERMISTOR PTC 330 OHM 1% 0805 | TFPT | -55°C ~ 125°C | Tape & Reel (TR) | Surface Mount | - | - | - | 0805 (2125 Metric) | - | |
| B59970C0160A051 | EPCOS | THERMISTOR PTC DISC | - | -40°C ~ 125°C | Tape & Reel (TR) | Through Hole | - | - | - | Disc, 9.0mm Dia x 3.5mm W | - | |
| STS210101L360500U129 | Cantherm | THERMISTOR PTC 1.01K OHM 1% AXL | - | -40°C ~ 170°C | Bulk | Free Hanging | - | - | - | Axial | - | |
| TFPT0805L4700FV | Dale / Vishay | THERMISTOR PTC 470 OHM 1% 0805 | TFPT | -55°C ~ 125°C | Cut Tape (CT) | Surface Mount | - | - | - | 0805 (2125 Metric) | - | |
| 5506-20-140-24-PTH | Advanced Sensors / Amphenol | THERMISTOR PTC 20 OHM 25% COIN | - | - | Bulk | Clamp On | - | - | - | Coin 14.0mm Dia x 1.5mm W | - | |
| 2381 670 90003 | Electro-Films (EFI) / Vishay | THERMISTOR PTC 120 OHM RADIAL | 2381 | - | Tape & Reel (TR) | PCB, Through Hole | - | - | - | Radial | - | |
| TFPT1206L2201FM | Dale / Vishay | THERMISTOR PTC 2.2K OHM 1% 1206 | TFPT | -55°C ~ 125°C | Tape & Reel (TR) | Surface Mount | - | - | - | 1206 (3216 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.