Bimetallic switch Q

Area of Application
The temperature limiter Q is used wherever, on the one hand, protection against overtemperatures is required, and, on the other hand, automatic cut-in of the device to be protected - subsequent to a follow-on cooling down period - is undesirable or not permissible.
Mounting brackets or clips available.

Function
The temperature limiter Q operates independent from any current supply. Temperature detection is effected by means of a bimetal disk which was first dimensioned in accordance with the required cut-off temperature. When this fixed cut-off temperature TA is reached, this bimetal disk will snap over, breaking a contact system and thereby interrupting the electric circuit of the device to be protected. In order to prevent any automatic cut-in of the circuit when the switch cools down again, the switch is equipped with an electric latch/self-holding device.

Self-holding Function
By means of a resistor heat is generated by the supply voltage applied after breaking the contact. This heat prevents any decrease in temperature below the value necessary for the cut-in temperature TE. In this way, the switch will keep its contact open, irrespective of its ambient temperature. To close the contacts of the switch, and thus closing the current circuit, will be possible only after disconnection from the power supply.

nom. breaking capacity:	250 V; 2,5 (1,0) A / 60 Hz
min. current:	5 V / 20 mA
max. breaking capacity:	2,5 A cos Φ 1,00 / 250 V, 150°C, 3000 cycles 3,0 A cos Φ 0,45 / 230 V, 135°C, 3000 cycles 4,0 A cos Φ 0,45 / 230 V, 135°C, 2000 cycles 6,5 A cos Φ 1,00 / 120 V, 120°C, 100 cycles
switching temperature:	40°C – 120°C (150°C), ±5 K
type of action:	1.C (3000 cycles) 2.C (max. drift ±5 K)
max. ambient temperature:	160°C
holding resistor:	0,1 kΩ - 60 kΩ, take note of safety instruction*
approvals:	VDE (EN 60730), UL, (2111) conform to RoHS

Limitor GmbH 是一家定时开关、 温度传感器、 温度保险丝、 温度开关、 温度限制器、 绝缘套管、 限流器的德国制造商，始于1979年。勒密拖 Limitor GmbH的高温、超高温领域的温度开关热保护产品处于水平。