Product Description
The LPTC-4050H and LPTC-4000H thermistors are high-precision PTC linear thermistors with a maximum temperature measurement of 125°C. Their resistance increases linearly with increasing temperature, demonstrating excellent linearity. Compared to PTC polymer ceramic thermistors, these thermistors offer superior linearity, eliminating the need for linear compensation measures and simplifying circuit design.
Specification
Product Name: Silicon PTC Thermistor
R25 : 4050Ω±3%
Package : D0-35 glass encapsulated
Operating temperature : -40℃ to +125℃
Application : Industrial, automotive and consumer electronics, etc.

| No. | Electrical Parameters | Symbol | Test Condition | Min. | Nor. | Max. | Unit |
| 1 | Resistance at 25℃ | R25 | Ta=25±0.05℃PT≦0.1mw | 3920 | 4050 | 4172 | Ω |
| 2 | Operating temperature range | / | / | -50 | / | +125 | ℃ |
| 3 | Temperature coefficient | a25~85 | / | 0.7 | / | / | %℃ |
| 4 | Rated power (25℃) | Pmax | Ta=25±0.5℃ | / | / | 10 | mw |
| 5 | Maximum operating current | Iopr | Ta=25±0.5℃ | / | / | 1.0 | mA |
| 6 |
Thermal Dissipation Coefficient (Still Air) |
/ | / | 2.5 | / | 5 | Mw/℃ |
Features
- Fully sealed,waterproof
- Stable glass housing
- Wide temperature application range
- Protection specific version possible(cable connection,external form,plug-in connection,etc.)
Application
1. Temperature detection and control in the automotive industry
2. Temperature detection and control in household appliances
3. Temperature compensation for precision circuits and crystal oscillators
4. Micromotor speed control
5. Temperature detection and control in medical devices







