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4.5*12方頭貼片保險(xiǎn)絲 SMD4718

產(chǎn)品信息

產(chǎn)品類(lèi)別：一次性貼片保險(xiǎn)絲

關(guān)鍵詞：4,5*12方頭貼片保險(xiǎn)絲,SMD4718

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發(fā)布時(shí)間：2022-10-18 17:18:30

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產(chǎn)品詳情

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

目錄編號(hào)Catalog No.	額定電流Ampere Rating	額定電壓Voltage Rating	分?jǐn)嗄芰?/span> Breaking Capacity	冷阻值Nominal Cold Resistance (mΩ)	熔化熱能I²TMelting Integral(A².S)	安規(guī)認(rèn)證 Agency Approvals
目錄編號(hào)Catalog No.	額定電流Ampere Rating	額定電壓Voltage Rating	分?jǐn)嗄芰?/span> Breaking Capacity	冷阻值Nominal Cold Resistance (mΩ)	熔化熱能I²TMelting Integral(A².S)	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.

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)I_RAT= (0.68)I_RAT

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
Reflow	- 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.