| Image | Part Number | Manufacturer | Description | Series | Operating Temperature | Packaging | Mounting Type | RoHS Status | Manufacturer Part Number | Package / Case | Polarization | Supplier Device Package |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KTY82/121,235 | NXP Semiconductors / Freescale | THERMISTOR PTC 990 OHM TO236AB | KTY82 | -55°C ~ 150°C | Tape & Reel (TR) | Surface Mount | - | - | TO-236-3, SC-59, SOT-23-3 | - | TO-236AB (SOT23) | |
| TFPT0805L1501FV | Dale / Vishay | THERMISTOR PTC 1.5K OHM 1% 0805 | TFPT | -55°C ~ 125°C | Cut Tape (CT) | Surface Mount | - | - | 0805 (2125 Metric) | - | 0805 | |
| PTFT0805L1000JW | Dale / Vishay | THERMISTOR PTC 100 OHM 5% 0805 | PTFT | -55°C ~ 125°C | Tape & Reel (TR) | Surface Mount | - | - | 0805 (2012 Metric) | - | 0805 | |
| TFPT1206L2201JV | Dale / Vishay | THERMISTOR PTC 2.2K OHM 5% 1206 | TFPT | -55°C ~ 125°C | Tape & Reel (TR) | Surface Mount | - | - | 1206 (3216 Metric) | - | 1206 | |
| TFPT1206L3800JV | Dale / Vishay | THERMISTOR PTC 380 OHM 5% 1206 | TFPT | -55°C ~ 150°C | Tape & Reel (TR) | Surface Mount | - | - | 1206 (3216 Metric) | - | 1206 (3216 Metric) | |
| B59008C0080A040 | EPCOS | THERMISTOR PTC 250 OHM RADIAL | - | 90°C ~ 160°C | Bulk | PCB, Through Hole | - | - | Radial | - | - | |
| B59546A0135A020 | EPCOS | THERMISTOR PTC 20 OHM 20% DISC | - | 5°C ~ 80°C | Tray | Surface Mount | - | - | Disc | - | - | |
| TFPT1206L4701FM | Dale / Vishay | THERMISTOR PTC 4.7K OHM 1% 1206 | TFPT | -55°C ~ 125°C | Tape & Reel (TR) | Surface Mount | - | - | 1206 (3216 Metric) | - | 1206 | |
| PTCSC17T155DBE | Electro-Films (EFI) / Vishay | THERMISTOR PTC 5% RECTANGULAR | - | -20°C ~ 165°C | - | Clamp On | - | - | Rectangular | - | - | |
| B59850T1120A62 | EPCOS | THERMISTOR PTC 50 OHM 15% 4SMD | - | -20°C ~ 125°C | Tape & Reel (TR) | Surface Mount | - | - | 4-SMD | - | 4-SMD |
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.