Datasheet

© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Radial Lead Fuses
TR3
®
> Fast-Acting > 303 Series
TT TT
T
ime (sec.)ime (sec.) ime (sec.)ime (sec.)
ime (sec.)
Contact Littelfuse for individual I-t curves
II
II
I
FaultFault
FaultFault
Fault
/ I / I
/ I / I
/ I
RatedRated
RatedRated
Rated
TR3 / No.
303303
303303
303
23456789 011
0
.
0
0
1
0
.
0
1
0
.
1
1
1
0
1
0
0
1
,
0
0
0
1
0
,
0
0
0
1
0
0
,
0
0
0
151.5
UL 248-14
Test value
I-t Characteristics
(Min-Max Limit)
Average Time Current CurvesTemperature 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)
(Typical Industry Recommendation)
Temperature Minimum:
100
° C
Temperature Maximum:
150
° C
Preheat Time: 60-180 seconds
Solder Pot Temperature:
260
° C Maximum
Solder Dwell Time: 2-5 seconds
Recommended Hand-Solder Parameters:
Solder Iron Temperature: 350° C +/- 5°C
Heating Time: 5 seconds max.
Note: These devices are not recommended for IR or
Convection Reflow process.
Recommended Process Parameters:
0
20
40
60
80
100
120
140
-40-20 020406080
AMBIENTTEMPERATURE(°C)
PERCENT OF RATING
23°C
FAST ACTING DE-RATINGCURVE