Discomelt II
Thermostat / Thermal Link Combination
Tmax 250 °C / Imax 23 A / short reaction time / easy mounting / orientation independent mounting / temperature resistant ceramic housing / standard terminals
Properly installed, the thermostat / thermal link combination type 161 791 may be used for applications where a fixed temperature needs to be monitored or controlled and a maximum temperature must not be exceeded, for example in household appliances such as dishwashers and washing machines, small electrical appliances such as coffeemakers, steam generators etc. or in electrically monitored water heaters.
A vaulted bimetal disc is used as a temperature sensing element in the thermostat. The disc is placed in direct contact with the
mounting plate of the combination therefore reacting quickly to changes in temperature. Upon reaching the preset temperature the bimetal disc operates and opens the electrical circuit. Upon cooling, the disc snaps back into its original position thereby closing the circuit again. The switching temperature is freely selectable within a wide range. The thermal link, approved in accordance with DIN VDE 0821 / EN 60691, has a solder insert in the mounting plate which is in direct thermal contact with the surface that is to be monitored. When the preset temperature is reached, the solder melts causing a pin to move which results in the electrical contacts opening. Resetting is not possible. 6 different preset solder temperatures are available. The two components thermostat and thermal link have a common mounting plate, which is responsible for thermal conduction. This ensures that the thermal information for thermostat and thermal link always comes from exactly the same source.
The advantages of Discomelt II
Details
Technical Data
fixed Thermostat / Thermal Link Combination
| Switching cycles | Tmax | |||||
| Type | Voltage | Current | VDE | cURus | ||
| V Ni | A | °C | ||||
| 161791 | ||||||
| .001 - 0XY | AC | 240 | 10 | 100.000 | 100.000 | 200 |
| AC | 240 | 15 | 10.000 | 30.000 | 200 | |
| AC | 120 | 13,5 | --- | 100.000 | 200 | |
| .301 - 3XY | AC | 240 | 10 | 40.000 | 100.000 | 250 |
| AC | 240 | 16 | 10.000 | 30.000 | 250 | |
| AC | 240 | 23 | 1.000 | --- | 250 | |
| AC | 400 | 7 | 10.000 | --- | 250 | |
| AC | 400 | 16 | 300 | --- | 250 | |
| .901 - 9XY | AC | 240 | 1 | 50.000 | 50.000 | 250 |
| AC | 400 | 1 | 10.000 | 10.000 | 250 | |
| DC | 48 | 1 | 100.000 | 100.000 | 250 | |
General product featrures:
| Switching temperature: | 60 °C - Tmax |
| Switching tolerance: | ± 5 K 60 - 180 °C ± 7,5 K > 180 - 250 °C |
| Differential: | 10 - 25 K (standard) modification on request |
| Rate of temperature rise: | > 1 K/min |
| Design: | according DIN EN60730 protection class I |
| Proof tracking index: | PTI > 250 V |
Technical Data TS Link
The "Minimelt II Plus" thermal fuse has been tested in accordance with DIN EN60691 and is approved for the following requirements:
| Ambient conditions: | Temperature fuse for use under normal atmospheric conditions. | |
| Circuit conditions: | Thermal fuse for use in ohmic circuits | |
| Comparative tracking index: | CTI ≥ 250 V | |
| Characteristic values | VDE, cURus = UL / CSA, CQC on request | |
| Nominal current | Ir | 15 A |
| Switch-off current | Ib | 22,5 A |
| Short-term overload current | Ip | 225 A |
| Nominal voltage | Ur | 240 V |
| Characteristic temperatures |
| Tf ... Nominal temperature |
| Th ... Continuous operating temperature in accordance with DIN EN60691 (measured at the base plate near the link insert) |
| Tm ... Max. temperature limit |
| Tf | Th | Th | Th | Tm |
| VDE | UL | CQC | ||
| 206 °C | 165 °C | 170 °C | 170 °C | 500 °C |
| 229 °C | 187 °C | 205 °C | 187 °C | 500 °C |
| 250 °C | 215 °C | 215 °C | 215 °C | 500 °C |
| 260 °C | 215 °C | 230 °C | 215 °C | 500 °C |
| 298 °C | 255 °C | 260 °C | 260 °C | 500 °C |
| 318 °C | 270 °C | 280 °C | 280 °C | 500 °C |
| Tolerance for Tf is according to VDE 0821 / DIN EN60691 / UL60691 -10 K | ||||
It is important to pay attention to an aligned design of both components.
Applications
Properly installed, the thermostat / thermal link combination type 161 791 may be used for applications where a fixed temperature needs to be monitored or controlled and a maximum temperature must not be exceeded, for example in household appliances such as dishwashers and washing machines, small electrical appliances such as coffeemakers, steam generators etc. or in electrically monitored water heaters.
Structure and mode of operation
A vaulted bimetal disc is used as a temperature sensing element in the thermostat. The disc is placed in direct contact with the
mounting plate of the combination therefore reacting quickly to changes in temperature. Upon reaching the preset temperature the bimetal disc operates and opens the electrical circuit. Upon cooling, the disc snaps back into its original position thereby closing the circuit again. The switching temperature is freely selectable within a wide range. The thermal link, approved in accordance with DIN VDE 0821 / EN 60691, has a solder insert in the mounting plate which is in direct thermal contact with the surface that is to be monitored. When the preset temperature is reached, the solder melts causing a pin to move which results in the electrical contacts opening. Resetting is not possible. 6 different preset solder temperatures are available. The two components thermostat and thermal link have a common mounting plate, which is responsible for thermal conduction. This ensures that the thermal information for thermostat and thermal link always comes from exactly the same source.
Advantages
- easy mounting
- both components mounted onto one base plate with homogenous heat transfer
- very fast response time thanks to integrated solder strut in the base plate
- protected contact system, no cover cap necessary
- large variance in different, discreet fuse temperatures from Tf 206 °C up to 318 °C
- high continuous operating temperature Th
- high contact opening force
- high dielectric strength and long lifespan
- consistent performance characteristics and product quality through fully automated production
Approbation
refer to approvals list which is available on request
Applications
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© AdobeStock
Major Appliances
Dishwasher, oven, professional cooking systems, washer
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© AdobeStock
Small household appliances
Multifunction stove, deep fryer, waffle maker, steamer, rice stove
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© AdobeStock
Beverage processing
Fully automatic coffee machines, milk frothers, tea machines, samovars
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© iStock
Clothing preparation / steam cleaning
Iron, steam station, steam straightener, steam cleaner
Downloads
List of all available downloads.
| Download file | Version | Extension | Size | |
|---|---|---|---|---|
|
Data sheet_161791
|
800 KB | Download |