LIM-Q-82-A-90-5-100-10A

yLimitor Temperature, Current, Time under Control 

## **Temperature Limiter Q (self holding)** 

**very compact constructional size mould-proof housing** 

## **Area of Application** 

The temperature limiter Q is used wherever, on one hand, protection against overtemperatures is required, and, on the other hand, automatic reset function of the device to be protected - subsequent to a follow-on cooling down period - is undesirable or not permissible. 

## **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 reset function of the device when the switch cools down again, the switch is equipped with an electrical self-holding resistor inside. 

## **Self-holding** 

Caused of a high value resistor heat is generated by the supply voltage applied after breaking the contact. This prevents any decrease in temperature below the value necessary for the closing temperature TE. In this way, the switch will keep its contact open, irrespective of its ambient temperature. Make the contact of the switch, and thus closing the circuit, will be possible only after disconnection from the supply voltage. 

## **Circuit diagram** 

## **Functional diagram** 

TA : Cut-off temperature TE : Closing temperature IK : Short-circuit current/blocking current 

**excellent thermal conduction characteristics due to homogenous constructional size** 

**high temperature sensitivity** 

**permanent cut-out by self-holding** 

## **Configuration examples** 

## **Technical Specifications Temperature Limiter Q** 

**nom. breaking capacity:** 250 V; 2,5 (1,0) A / 60 Hz **min. current:** 5 V / 20 mA 

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 

**max. breaking capacity:** 

40°C – 120°C (150°C), ±5 K 

**switching temperature: type of action:** 

1.C (3000 cycles) 2.C (max. drift ±5 K) 

**max. ambient temperature:** 160°C **holding resistor:** 0,1 kΩΩ **approvals:** 

0,1 kΩΩ - 60 kΩ, take note of safety instruction* VDE (EN 60730), UL, (2111) conform to RoHS 

## **Dimensions Q8** 

alternativ: 

Q5 housing type: **L** 4,0 x **W** 8,0 x **H** 16,0 

Q1 housing type: 

**L** 3,6 x **W** 8,0 x **H** 14,5 

## **Accessories** 

## **Technical Data** 

The housing of this switch consists of a single part bag housing which is closed at its end by resin (Q8 housing type); this makes the switch mould-proof. This mouldproof switch may thus also be used in "tough" environments subject to the detrimental influences of humidity or dirt. Alternative housing types: unsealed version (Q5) or plate bar version (Q1). All housing types are voltage-free. Due to its constructional size the Q switch is one of the most compact thermostats available. This ensures a very fast response rate. 

Its rectangular homogenous constructional size provides excellent thermal conduction characteristics. The housing is resistant against temperatures (permanent temperature: 160°C), with a temporary increase in temperature up to 200°C max. being permissible for a short period only. 

The standard version is equipped with 100 mm long (length of stripped isolation: 10 mm) insulated leads or wire connection (AWG 24). 

Special leads or wire (larger diameter to AWG 22) or different lengths available on request. 

**==> picture [126 x 24] intentionally omitted <==**

**----- Start of picture text -----**<br>
Mounting brackets<br>Mounting clips<br>**----- End of picture text -----**<br>


## ***Safety Instruction** 

Adjusting right hold resistor value on its final assembling position under real heat conduction, otherwise risk of overheating! (table-sheet selfhold resistor value) 

## **Type reference Q switch** 

## **Q 8 X-X-XXX-XX-XXX** 

Length of leads/wires Standard = 100 mm temperature tolerance in K (+/- 5/10 K) Cut-off temperature in °C 40,45,50,...150°C self-holding resistor Connection type: 2 = insulated leads 3 = insulated wires • • • 8 = sealed housing 

Example for type reference: 

## **Q 8 2 - Z - 125 - 05 - 100** 

thermal switch with electrical self-holding function insulated lead (standard AWG 24) holding resistor 30 kΩ 125°C cut-off temperature tolerance ±5 K 100 mm lead length (10 mm stripped length) 

fy Limito Temperature, Current, Time under Control 

**Limitor GmbH Phone +49(0)7181/48390-0 info@limitor.de Dieselstrasse 22 Fax +49(0)7181/48390-10 www.limitor.de D-73660 Urbach** 

manufactured: 25.05.2010 subject to change