4.5*12方头贴片保险丝 SMD4718

产品信息
产品类别:一次性贴片保险丝
关键词:4,5*12方头贴片保险丝,SMD4718
点击率:
发布时间:2022-10-18 17:18:30
全国服务热线:13549460265
产品详情

1、   Description, Features and Applications

The R1245 series fast-acting square Surface Mount fuses are designed for high-end cloud  computing servers, telecom base station power supplies, blockchain servers, and new energy vehicle battery management systems, RoHS compliant, Halogen Free and lead(Pb) exempts of the requirements of RoHS Directive(2002/95/EC), with U.S. (UL/CSA) safety agency approvals. Provide board level primary and secondary circuit protection in a wide variety of applications. With excellent inrush current withstanding capability, excellent reliability for thermal and mechanic shock, also have a high reliability and stable solder ability, end caps are available in gold/silver plated.

Physical map:


Features:

•Fast acting                                        • Small size(12.5mm*4.5mm)

•High current rating available                               • Wide operating temperature range( -55°C to 125°C)

•Low temperature de-rating                        • RoHS compliant, Halogen Free

•Tape and Reel for automatic placement               • Conflict free metals

Applications:

 •     Telecom base station power supplies  •     Cloud computing      • Block chain server  • Battery Management System


2、   Standards:In accordance with UL 248-14.

3、Electrical Characteristics for Series

% of Ampere  rating

OpeningTime

100%

4 hours, Minimum

200%

  60 sec., Max.

4、Electrical Specifications by Item

目录编号Catalog No.

额定电流Ampere Rating

额定电压Voltage Rating

分断能力

Breaking Capacity

冷阻值Nominal Cold Resistance

(mΩ)

熔化热能I2TMelting Integral(A2.S)

安规认证

Agency Approvals

UL

CSA

1245.1

1A

72-100VDC

125-250Vac

1KA@32VDC

500A@72VDC

300A@100VDC

75

0.87

1245.2

2A

50

3.8

1245.5

18

23

1245.10

10A

8.05

91

1245.15

1

4.50

203

1245.20

20A

3.30

360

1245.25

2

2.25

563

1245.30

30A

1.98

810

1245.40

40A

1.20

1360

1245.50

50A

0.99

1949

1245.60

60A

0.79

2887

1245.80

80A

0.55

5270

1245.100

100A

0.33

8080

              ●DC Cold Resistance are measured at <10% of rated current in ambient temperature of 25℃;

              ●Typical Pre-arching I2t are calculated at 10*In Current or 8ms.


http://vdefuse.com/uploadfile/image/20190126/20190126182836_88002.gif

Notes:

1.  Derating depicted in this curve is in addition to the standard derating of 20% for continuous operation.

Example:For continuous operation at 75 degrees celsius, the fuse should be derated as follows:I = (0.80)(0.85)IRAT= (0.68)IRAT


5、Soldering Parameters

Reflow Condition

Pb – Free assembly

Pre Heat

- Temperature Min (Ts(min)) 150°C

- Temperature Max (Ts(max)) 200°C

- Time (Min to Max) (ts) 60 – 120 secs

Average ramp up rate (Liquidus Temp (TL) to peak

3°C/second max.

TS(max) to TL - Ramp-up Rate

3°C/second max.

Reflow

- Temperature (TL) (Liquidus) 217°C

- Temperature (tL) 60 – 90 seconds

Peak Temperature (TP)

 260+0/–5 °C

Time within 5°C of actual peak Temperature (tp)

20 – 40 seconds

Ramp-down Rate

5°C/second max.

Time 25°C to peak Temperature (TP)

8 minutes max.

Do not exceed

 260°C

Wave Soldering Parameters

260°C Peak Temperature,3 seconds max.

 

1206yc-3

6、Dimensions and Structure


7Product Characteristics

编号

NO.

项目

Item

内容

Content

参考标准

Reference standards

1

产品标识

Product Marking

Brand, Ampere Rating

 marking standards

2

工作温度

Operating Temperature

-55°C to 125°C

–55ºC to 125ºC with proper derating

3

可焊性

Solderability

T=240°C±5°C , t=3sec±0.5sec,

Coverage≥95%

MIL-STD-202, Method 208

4

耐焊接热

Resistance to Soldering Heat

10 sec at 260°C

MIL-STD-202, Method 210, Test condition B

5

绝缘阻抗

Insulation Resistance (after Opening)

10,000 ohms minimum

5 cycles, -65°C / +125°C, 15 minutes at each extreme

MIL-STD-202, Method 302, Test Condition A

6

热冲击

Thermal Shock

MIL-STD-202, Method 107, Test Condition B

7

机械冲击

Mechanical Shock

100G’s peak for 6 milliseconds,

3cycles

MIL-STD-202, Method 213, Test I

8

振动试验

Vibration

0.03”amplitude, 10-55 Hz in 1

min. 2hrs each XYZ=6hrs

MIL-STD-202, Method 201

9

耐湿性

Moisture Resistance

10 cycles

MIL-STD-202, Method 106

10

盐雾试验

Salt Spray

5% salt solution, 48hrs

MIL-STD-202, Method 101, Test Condition B

8、Packaging

2,000 pcs in 13 inches dia. reel, 24mm wide tape, EIA Standard 481

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