SQF Soojus Kaitsme Tsement Takistid
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SQF Soojus Kaitsme Tsement Takistid

SQF Soojus Kaitsme Tsement Takontid Funktsioonid: 1 See on sobivad jaoks kaitsmsissee voolursisseg lauad. 2 Tuleksissedel Ehitus sisse a keraamiline juhtum, resontant kuni niiskus ja sissesulation. 3 Sisse kõrge resontance väärtus, the wsissedsisseg südamikud tahe ole asendatud kõrval vägi film südamikud. 4 Suurepärane ülepinge characterontics ja täpne paindlikkus.

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SQF Thermal Fuse Cement Resistors



Products

SQF Thermal Fuse Cement Resistors

Features

1. It is suitable for protecting circuit boards.

2. Flameproof construction in a ceramic case, resistant to humidity and insulation.

3. In high resistance value, the winding cores will be replaced by power film cores.

4. Excellent anti-surge characteristics and accurate fusibility.




Electrical And Mechanical Performance:


Characteristics

Standards

Test Methods

Resistance Tolerance

±5%(J)

-

Resistance Temp. Coeff.

±300 ppm/°C;

<1Ω:±600ppm/°C

-

Power Rating Load

Surface temp.130°C Max.ΔR/R≤±1%

Rated voltage for 30 minutes

Short Time Overioad

±2%

10 times of rated wattage for 5 seconds.

 

Dielectric Withstanding Voltage

No evidence of mechanical damage or insulation breakdown.

 

AC 1000V for 1 minutes.

 

Insulation Resistance

10,00MΩ

DC 500V megger

 

Terminal Strength

 

No evidence of mechanical damage.

 

4.5 kg

 

Solder-ability

Minimum95%coverage

235 ± 5°C for 2 seconds

Resistance to Soldering Heat

No evidence of mechanical damage.ΔR/R≤±1%

265±5°C for 10 ±1 seconds

 




Environmental Characteristics:


Characteristics

Standards

Test Methods

Temp. Cycle

△R/R≤±1%

 -25°C ( 1 hrs.)—►

Room Temp.( 2 hrs.)

—►+Operating temp.( 1 hrs.)

—►Room Temp.( 2 hrs.) / ( 5 cycles)

Load Life

△R/R≤±5%

Rated power load 90 minutes ON 30 minutes OFF

70°C 1000 hours

Moisture-proof Load Life

△R/R≤±5%

Rated power load 90 minutes ON 30 minutes OFF

40°C95%RH500 hours

Nonflammability

 

not flamed

 

16 times of rated wattage for 5 min.

 




Dimensions:


Rated Wattage

W±1

S±1

H±1.5

P+2/-1

d1 ±0.1

d2±0.1

Resistance Range (Ω)

SQF3

12

8

25

5

0.8

2A:0.6

3A:0.6

5A:1.0

10A:1.0

0.1~50K

SQF5

13

9

25

5

0.8

0.1~50K

SQF7

13

9

39

5

0.8

0.1~50K

SQF10S

16

12

35

7.5

0.8

0.1~50K

SQF10

20Max.

9

25Max.

12.5

0.8

0.8

0.1-50K






Ratings:


Rated Current

Rated Functioning Temperature

Rated Wattage

SQF3

SQF5

SQF7

SQF10

SQF10S

3A

145°C

1.6W

1.6W

2.2W

3.2W

2.5W

5A

145°C

1.6W

1.6W

2.2W

3.2W

2.5W

10A

132°C

1.6W

1.6W

2.2W

3.2W

2.5W

10A

185°C

2.1W

2.1W

2.4W

4.2W

3.5W




Derating Curve :


For resistors operated in ambient temperatures above 25°C , power rating must be derated in accordance with the curve below.





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