Radial Lead Fuses
TR3® > Fast-Acting > 303 Series
303 Series,
TR3®, Fast-Acting Fuse
Description
The 303 Series are TR3®, fast-acting type, 125V rated
fuses designed in accordance to UL 248–14.
Features
t 4IPDLTBGFDBTJOH
t %JSFDUTPMEFSBCMFPS
plug-in versions
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t *OUFSOBUJPOBMMZ
approved
Agency Approvals
Agency File Number
Ampere Range
E67006
50mA-5A
051378
50mA-5A
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t 7JCSBUJPOSFTJTUBOU
t -FBEGSFF
t "WBJMBCMFGSPNN"
to 5A
Applications
t #BUUFSZDIBSHFST
t 1PXFSTVQQMJFT
t $POTVNFSFMFDUSPOJDT
t *OEVTUSJBMDPOUSPMMFST
303 Series
Agency
t 3FEVDFE1$#TQBDF
requirements
Electrical Characteristics
% of Ampere
Rating
Opening Time
200
60 Seconds, Maximum
Electrical Characteristics
Amp Code
0050
0063
0080
0100
0125
0160
0200
0250
0315
0400
0500
0630
0800
1100
1125
1160
1200
1250
1315
1400
1500
Rated
Current
Voltage
Rating
50mA
63mA
80mA
100mA
125mA
160mA
200mA
250mA
315mA
400mA
500mA
630mA
800mA
1.00A
1.25A
1.60A
2.00A
2.50A
3.15A
4.00A
5.00A
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
Voltage
Drop
1.0 x IN
max. (mV)
800
780
730
700
650
600
550
500
450
400
380
160
155
150
145
140
130
125
120
110
105
Breaking Capacity
50A / 125VAC
60-60 Hz/cos ϕ - 1
50A / 63 VDC
Power
Dissipation
1.0 x IN
max. (mW)
40
50
60
70
85
100
110
125
145
160
190
100
125
155
185
225
260
315
380
440
525
Melting
Integral
10 x IN
max. (A2s)
0.00007
0.00013
0.0002
0.0004
0.0022
0.0029
0.0042
0.0082
0.015
0.025
0.042
0.015
0.025
0.039
0.059
0.11
0.17
0.23
0.45
1.0
1.5
Approvals
®
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand.
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/303.html for current information.
135
Revised: January 7, 2009
303 Series
Fuses
Introduction toRadial
CircuitLead
Protection
TR3® > Fast-ActingTransientology
> 303 Series
Temperature Rerating Curve
Average Time Current Curves
TR3 / No. 303
00
0,0
10
140
I-t Characteristics
100
(Min-Max Limit)
UL 248-14
Test value
,00
10
80
0
60
0
1,0
23°C
40
0
PERCENT OF RATING
120
20
-20
0
20
40
60
80
0
-40
10
0
10
Time (sec.)
AMBIENT TEMPERATURE (°C)
1
0.1
1
0.0
01
0.0
1
1.5
2
3
4
5
6
7 8 9 10
15
IFault / I Rated
Contact Littelfuse for individual I-t curves
Soldering Parameters - Wave Soldering
Recommended Process Parameters:
280
260
Wave Parameter
240
220
Preheat:
200
(Depends on Flux Activation Temperature)
180
160
140
120
80
60
40
Lead-Free Recommendation
(Typical Industry Recommendation)
Temperature Minimum:
100° C
Temperature Maximum:
Preheat Time:
150° C
60-180 seconds
100
Solder Pot Temperature:
260° C Maximum
Solder Dwell Time:
2-5 seconds
Recommended Hand-Solder Parameters:
240
230
220
210
200
190
180
170
160
140
150
130
120
110
90
100
80
70
60
50
40
30
20
0
10
20
0
Temperature (°C) - Measured on bottom side of board
300
Time (Seconds)
Solder Iron Temperature: 350° C +/- 5°C
Heating Time: 5 seconds max.
Cooling Time
Preheat Time
Dwell Time
Note: These devices are not recommended for IR or
Convection Reflow process.
303 Series
136
Revised: January 7, 2009
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/303.html for current information.
Radial Lead Fuses
TR3® > Fast-Acting > 303 Series
Product Characteristics
Base/Cap: Black Thermoplastic Base
Polyamide PA 6.6, UL 94V-0
Brass, Nickel-plated Cap
Round Pins: Copper alloy, Tin–plated
Materials
Lead Pull Strength
10 N (EN 60068-2-21)
Solderability
260ºC, ≤ 3s. (Wave)
350ºC, ≤ 1s. (Soldering Iron)
Soldering Heat
Resistance
260ºC, 10s. (IEC 60068-2-20)
350ºC, 3s. (Soldering Iron)
Operating Temperature
-25ºC to +70ºC (consider de-rating)
Climatic Category
-25ºC/+70ºC/21 days
(EN 60068-1..3)
Stock Conditions
+10ºC to +60ºC RH,
≤ 75% yearly average, without dew
Vibration Resistance
24 cycles at 15 min. each
(EN 60068-6)
10 - 60 Hz at 0.75 mm amplitude
60 - 2000 Hz at 10 g acceleration
Part Numbering System
Dimensions
L
max. 8
Ø6
2,54
303 Series
1 +0,1
Ø 0,6
Dimensions (mm)
Holes in PCB
Long Leads (L=18.8 mm)
Short Leads (L=4.3 mm)
Packaging
Packaging Option
303 Series
Tape & Ammopack
Short Leads
Short Leads
Packaging Specification
Quantity
Quantity &
Packaging Code
Reel Size
N/A
N/A
N/A
1,500
200
300
000
013
042
N/A
N/A
N/A
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/303.html for current information.
137
Revised: January 7, 2009
303 Series
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