Datasheet

315
Axial Lead & Cartridge Fuses
3AG > Fast Acting > 312/318 Series
312/318 Series
© 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Please refer to www.littelfuse.com/series/312.html
or /318.html for current information.
312/318 Series
Average Time Current Curves
1000
100
10
1
0.1
0.01
1
10
100
0.01
0.1
.031 A .062 A .125 A .250 A .375 A .500 A .750 A 1 A 1.5 A
2 A
2.5 A 3 A 4 A 5 A
6 A
7 A
8 A 10 A
0.005
TIME IN SECONDS
CURRENT IN AMPERES
Temperature Rerating Curve
Soldering Parameters - Wave Soldering
Dwell Time
0
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
0
10 20 30 40 50 60 70 80 90
100 110 120 130 140 150 160 170 180 190 200 210 220 230 240
Time (Seconds)
Temperature (°C) - Measured on bottom side of board
Cooling Time
Preheat Time
Wave Parameter Lead-Free Recommendation
Preheat:
(Depends on Flux Activation Temperature)
5ZQJDBM*OEVTUSZ3FDPNNFOEBUJPO
Temperature Minimum:
100
° C
Temperature Maximum:
150
° C
1SFIFBU5JNF 60-180 seconds
Solder Pot Temperature:
260
° C Maximum
Solder Dwell Time: 2-5 seconds
Recommended Hand-Solder Parameters:
4PMEFS*SPO5FNQFSBUVSF¡$¡$
)FBUJOH5JNFTFDPOETNBY
Note: These devices are not recommended for IR or
Convection Reow process.
Recommended Process Parameters:
1MFBTFDPOUBDU-JUUFMGVTFGPSNPSFEFUBJMTPOUIPTF5$$VSWFTPGPUIFSBNQFSF
ratings which are not published.