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4291.25

更新时间： 2024-11-13 13:45:39
品牌 Logo 应用领域
力特 - LITTELFUSE 电子
页数 文件大小 规格书
1页 65K
描述
429系列快熔型SMF是一款小型（1206尺寸）薄膜器件，旨在为用于空间受限应用中的电路  提供次级保护，例如手持式  的可携带电子设备。  此系列无卤素、无铅，且符合  RoHS指令的要求。 功能与特色:

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4291.25 数据手册

  
SURFACE MOUNT FUSES  
THIN-FILM SURFACE MOUNT  
®
®
1206 Very Fast-Acting Thin-Film Type 429 Series  
• For new designs below 4A please consult the 433 Series  
ELECTRICAL CHARACTERISTICS:  
% of Ampere  
Rating  
Opening  
Time at 25°C  
100%  
200%  
300%  
4 hours, Minimum  
5 seconds, Maximum  
0.2 seconds, Maximum  
AGENCY APPROVALS: Recognized under the  
Components Program of Underwriters Laboratories and  
Certified by CSA.  
RECOMMENDED PAD LAYOUTS  
AGENCY FILE NUMBERS: UL E10480, CSA LR 29862.  
INTERRUPTING RATINGS:  
3.18  
(.125")  
0.125 – 3A  
4 – 7A  
50 amperes at rated voltage, VAC/VDC  
35 amperes at rated voltage, VAC/VDC  
1.52  
1.52  
3.81  
ENVIRONMENTAL SPECIFICATIONS:  
(.060")  
(.060")  
(.150")  
Operating Temperature: –55°C to 90°C. Consult tempera-  
ture rerating chart on page 4. For operation above 90°C  
contact Littelfuse.  
Vibration: Withstands 10–55 Hz per MIL-STD-202F,  
Method 201A and 10-2000 Hz at 20 G’s per MIL-STD-202F,  
Method 204D, Condition D.  
Insulation Resistance (After Opening): Greater than 10 KOhm.  
Resistance to Soldering Heat: Withstands 60 seconds  
above 200°C up to 260°C, maximum.  
1.14  
(.045")  
2.49 (.098")  
REF.  
1.12  
(.044")  
REF.  
2.03  
(.080")  
REFLOW SOLDER  
1.14  
(.045")  
.635  
(.025")  
Thermal Shock: Withstands 5 cycles of –55° to 125°C.  
PHYSICAL SPECIFICATIONS:  
Materials: Body: Epoxy Substrate  
Terminations: Copper/Nickel/Tin-Lead (95/5)  
Cover Coat: Conformal Coating  
Average Time Current Curves  
Soldering Parameters:  
100  
Reflow Solder — 260°C, 30 seconds maximum  
PACKAGING SPECIFICATIONS: 8mm Tape and Reel  
per EIA-RS481-1 (IEC 286, part 3); 3,000 per reel, add  
packaging suffix, WR.  
PATENTED  
ORDERING INFORMATION:  
10  
Nominal  
Voltage  
Rating  
Nominal  
Resistance  
Cold Ohms1  
Catalog  
Number  
Ampere  
Rating  
Marking  
Code  
Melting I2t  
(A2 Sec.)2  
429.125  
429.200  
429.250  
429.375  
429.500  
429.750  
429 001  
429 1.25  
429 01.5  
429 1.75  
429 002  
429 02.5  
429 003  
0.125  
0.200  
0.250  
0.375  
0.500  
0.75  
1.00  
1.25  
1.50  
1.75  
2.0  
FB  
FC  
FD  
FE  
FF  
FG  
FH  
FJ  
FK  
FL  
FN  
FO  
FP  
125  
125  
125  
125  
63  
63  
63  
63  
63  
63  
63  
32  
32  
2.30000  
0.93800  
0.62500  
0.37500  
0.24050  
0.13700  
0.09950  
0.07475  
0.06250  
0.05000  
0.03975  
0.03065  
0.02625  
0.00020  
0.00055  
0.00100  
0.00280  
0.0060  
0.0170  
0.035  
0.065  
0.125  
0.150  
0.230  
1
0.1  
0.01  
2.5  
3.0  
0.500  
0.700  
For New Designs Below 4A Use 433 Series.  
429 004  
429 005  
429 007  
4.0  
5.0  
7.0  
FS  
FT  
FU  
24  
24  
24  
0.01926  
0.01375  
0.00925  
1.50  
2.70  
3.60  
1 Measured at 10% of rated current, 25°C. 2 Measured at rated voltage.  
0.001  
0.1  
1
10  
CURRENT IN AMPERES  
100  
33  
1

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