Thermik_特密

PTC 正温度系数热敏电阻傳感器 / 電動機保護傳感器

正温度系数(Positive Temperature Coefficient 或 简称PTC) 热敏电阻传感器是对温度敏感的半导体电阻器,也称为电动机保护传感器 ( motor protection sensor ) 或PTC电阻器。

此传感器采用电阻对温度的可重复变化做为启动功能,譬如说自动切断继电器。它可精确的控制多类电器设备的温度,用于关闭负载电流,启动警告器或作其他控制用途。

Power class PTC thermistors

Series PTC thermistors

SNM / SKM / STM / LTM / SSM / TPR

Installation

The PTC’s are usually installed parallel to the coil so that the mechanical strain is minimized. The Mylar-Nomex shrink cap is well suited due to its mechanical stability (no cold flow, as opposed to Tefl on). In conjunction with the miniature pill (Ø 1,5 mm), response times of ≤ 5 seconds to a maximum of 10 seconds were achieved.

Function

Thermik thermistors correspond to DIN 4408, DIN 44082 and IEC 34-11-2, and exhibit a very high temperature sensitivity. The resistance increases strongly in the area of the rated response temperature. This change can be used to switch off the load circuit through a triggering device. Electronic evaluations of many different applications are also possible. The typical characteristics of Thermik thermistors are presented in the temperature resistance diagram.

Advantages:

Small dimensions
Fast response times
Mechanical stability
Temperature-resistance-characteristic-curves individually made for the application

Resistance Diagram
Temperature Resistance Diagram and Primary Parameters as per DIN 44081 / 44082 and IEC 34-11-2

Customer Specific Designs

Design K – customer specific – upon request Possible Variations/Additions:

Colour coding

Wire insulation material or wire cross-section

Cable end packing

Connection technology

UL wire components used

High voltage proof insulation (suited for safety class II applications)