UBMINIATURE
S
UBMINIATURE
F
USES
TR3
N o. 303 / TR3
125V,
UL 248-14, 125V, F
T ime-Current
Standard
Quick Acting (F)
Specifications
Packaging
000: Tape/Ammopack (1500 pcs.)
013: Long Leads - Bulk (200 pcs.)
042: Short Leads - Bulk (300 pcs.)
Base/Cap:
Black Thermoplastic Base
Polyamide PA 6.6, UL 94V0
Brass, nickel-plated Cap
Round Pins: Copper alloy, tin plated
-25 ºC to +70 ºC (consider de-rating)
-25 ºC/+70 ºC/21 days (EN 60068-1,-2-1,-2-2,-78)
+10 ºC to +60 ºC
relative humidity
≤
75 % yearly average,
without dew, maximum value for 30 days-95 %
24 cycles at 15 min. each (EN 60068-6)
10 - 60 Hz at 0.75 mm amplitude
60 - 2000 Hz at 10 g acceleration
10 N (EN 60068-2-21)
Characteristic
UL 248-14
CSA C22.2 No. 248.14
UL Listed
CSA Certified
Materials
Approvals
Features
Dimensions (mm)
Ø6
Reduced PCB space requirements
Direct solderable or plug-in versions
Internationally approved
Low internal resistance
Shocksafe casing
Vibration resistant
Temperature
Operating Temperature
Climatic Category
Stock Conditions
max. 8
Vibration Resistance
2,54
Ø 0,6
L
1 +0,1
Lead Pull Strength
Solderability
Holes in PCB
Long Leads (L=18.8mm)
Short Leads (L=4.3mm)
260 ºC,
≤
3 s (Wave)
350 ºC,
≤
1 s (Soldering Iron)
260 ºC, 10 s (IEC 60068-2-20)
Soldering Heat Resistance
Marking
<5s
Limits for Pre-arcing Time
Rated Current
50 mA ... 5.00 A
2.0 x I
N
< 60 s
2.0 x I
N
, Voltage Rating, Current Rating, Approvals
Unit Weight
0.40 g (approx.)
Permissible continuous operating current is
≤
70 % at ambient temperature of 23 ºC (73.4 ºF).
Rated
Amp
Voltage
Breaking
Voltage Drop Power Dissipation Melting Integral
1.0 x I
N
10 x I
N
Current
Code
Rating
Capacity
1.0 x I
N
max. (mV)
max. (mW)
max. (A
2
s)
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
0050
0063
0080
0100
0125
0160
0200
0250
0315
0400
0500
0630
0800
1100
1125
1160
1200
1250
1315
1400
1500
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
125V
800
780
730
700
650
600
550
500
450
400
380
160
155
150
145
140
130
125
120
110
105
40
50
60
70
85
100
110
125
145
160
190
100
125
155
185
225
260
315
380
440
525
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
CSA
UL
50A / 125 V AC
50-60Hz
cos
ϕ
= 1.0
50A / 63 V DC
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand.
Order
Information
032906
Qty.
Order-
Number
Series
303
Amp Code
Packaging
Specifications are subject
to change without notice
In our continuing strategy to deliver unparalleled circuit protection solutions,
technical expertise and application leadership, we proudly introduce the
WICKMANN Group and its products to the Littelfuse portfolio.
www.littelfuse.com
UBMINIATURE
S
UBMINIATURE
F
USES
TR3 / No. 303
I-t Characteristics
(Min-Max Limit)
UL 248-14
Test value
Time (sec.)
00
0,0
10
,00
10
0
0
1,0
0
10
0
10
1
0.1
1
0.0
01
0.0
1
1.5
2
3
4
5
6
7 8 9 10
15
I
Fault
/ I
Rated
Contact Littelfuse for individual I-t curves
032906
In our continuing strategy to deliver unparalleled circuit protection solutions,
technical expertise and application leadership, we proudly introduce the
WICKMANN Group and its products to the Littelfuse portfolio.
www.littelfuse.com
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