MP001618

## **Thermal Fuse Axial Leaded** 

## **Description** 

The BTT thermal cutoff fuses are non-resetting single-pole and normally closed devices and provide accurate, reliable protection for high temperature applications against overheating through interrupting electric current. With their metal body and strong leads these fuses offer a sturdy built and high rated currents such as 10 or 15 Amperes. 

## **Applications** 

Thermal cutoff fuses are widely used in various applications such as transformers, adapters, secondary batteries, household appliances, gas water heaters, lighting and other heating equipment 

## **Features** 

- Metal casing, epoxy sealing material 

- Small size, Ф4mm×10mm 

- 1mm lead wires made of tin or silver plated copper 

- Protection against harmful over-temperature in primary and secondary applications 

- Lead-free and Halogen-free 

- Designed according to IEC 60691, UL 60691, EN 60691, etc 

## **Specifications** 

Operating Temperature : -55°C to +125°C Storage Conditions : +10°C to +60°C Relative Humidity : ≤ 75% yearly average without dew, maximum 30 days at 95% Vibration Resistance :  24 cycles at 15 min. each 10-60Hz at 0.75mm amplitude 60-2000Hz at 10g acceleration 

## **Electrical Characteristics at 25°C** 

|**(°C)**<br>MP001618<br>73|**(°C)**<br>**Temperature**<br>**(°C)**<br>69 ±2|**Temperature**<br>**(°C)**<br>**(°C)**<br>**(A)**<br>**(V)**<br>50<br>150<br>10A<br>250V AC|
|---|---|---|
|**Ratings**|**Indicator**|**Description**|
|Rated Functioning<br>Temperature|Tf|The temperature at which the thermal cutoff fuse changes its state of conductivity and<br>opens the circuit with detection current of <10mA as the only load. The temperature<br>tolerance for UL CSA and VDE standards is +0. -10ºC|
|Hold Temperature|Thold|The maximum temperature at which a thermal cutoff can be maintained while<br>conducting rated current for 168 hours without causing a change in the conductivity<br>to open the circuit.|
|Maximum<br>Temperature Limit|Tm|At the rated voltage, the temperature the fuse can withstand for 10 minutes at highest<br>temperature ratingwithout change in the conductivity|



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## **Thermal Fuse Axial Leaded** 

|**Ratings**|**Indicator**|**Description**|
|---|---|---|
|Rated Current|Ir|The maximum current which the thermal cutoff fuse is able to carry and not affect its<br>electrical characteristics.|
|Rated Voltage|Vr|The maximum voltage which the thermal cutoff fuse is able to carry and not affect its<br>electrical characteristics.|



## **Operation Principle** 

## **Before action:** 

In normal condition the thermal pellet keeps the Short Spring in tension, which provides contact between the copper disk and the silver contact. All parts, lead A, silver contact,metal case and lead B are connected and electric circuit current can pass freely through the thermal fuse. 

## **Cut off:** 

When the temperature increases and reaches the Rated Functioning Temperature(Tf), the thermal pellet starts to melt and liquefies. this will release the Long Spring and separates the silver contact from the lead, cutting off the current. 

## **Diagram** 

Dimensions : Millimetres 

## **Part Number Table** 

|**Part Number Table**||
|---|---|
|**Description**<br>**Part Number**|**Part Number**|
|Thermal Fuse, 73°C, 10A, 250V AC, Axial Leaded|MP001618|



**Important Notice :** This data sheet and its contents (the “Information”) belong to the members of the AVNET group of companies (the “Group”) or are licensed to it. No licence is granted for the use of it other than for information purposes in connection with the products to which it relates. No licence of any intellectual property rights is granted. The Information is subject to change without notice and replaces all data sheets previously supplied. The Information supplied is believed to be accurate but the Group assumes no responsibility for its accuracy or completeness, any error in or omission from it or for any use made of it. Users of this data sheet should check for themselves the Information and the suitability of the products for their purpose and not make any assumptions based on information included or omitted. Liability for loss or damage resulting from any reliance on the Information or use of it (including liability resulting from negligence or where the Group was aware of the possibility of such loss or damage arising) is excluded. This will not operate to limit or restrict the Group’s liability for death or personal injury resulting from its negligence. Multicomp Pro is the registered trademark of Premier Farnell Limited 2019. 

Newark.com/multicomp-pro Farnell.com/multicomp-pro Element14.com/multicomp-pro 

02/08/21 V1.1 

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