Cartridge and Axial Lead Fuses
3AG > Fast Acting > 312/318 Series
Temperature Rerating Curve
Average Time Current Curves
.031 A
.062 A
.125 A
1000
100
TIME IN SECONDS
10
1
0.1
0.01
0.005 0.01
.250 A
.375 A
.500 A
.750 A
1A
1.5 A
2A
2.5 A
3A
4A
5A
6A
7A
8A
10 A
10
100
1
0.1
CURRENT IN AMPERES
Soldering Parameters - Wave Soldering
300
Temperature
(°C) - Measured on bottom side of board
280
260
240
220
200
180
160
140
120
100
80
60
40
20
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
10
20
30
40
50
60
70
80
90
0
0
Recommended Process Parameters:
Wave Parameter
Preheat:
(Depends on Flux Activation Temperature)
Lead-Free Recommendation
Temperature Minimum:
Temperature Maximum:
Solder Pot Temperature:
Solder Dwell Time:
100
°
C
150
°
C
60-180 seconds
280
°
C Maximum
2-5 seconds
Recommended Hand-Solder Parameters:
Time
(Seconds)
Preheat
Time
Dwell
Time
Cooling
Time
Note: These devices are not recommended for IR or
Convection Reflow process.
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
http://www.littelfuse.com/series/312.html or
Please refer to www.littelfuse.com for current information. 318.html for current information.
155
Revised: July 16, 2008
312/318 Series
LITTELFUSE [ LITTELFUSE ]
