521 Quick-Acting Miniature Fuse
BETTER ELECTRONICS
TECHNOLOGY CO., LTD.
东莞市贝特电子科技股份有限公司
www.betterfuse.com
China sales:
Jacky Huang
+86 769-83238731 ext.859
Japan sales:
Erin
+86-769-2307 8202
Europe sales:
Helge Glueck
+49-341-946 98772
South Korea sales:
Jenny Li
+86 769-2307 8212
20±0.5
Φ
5.
2
+0.1 -0
.2
5,25±0,2
Main Characteristics
Cartridge Miniature fuse; Quick-Acting(F)
Standard
IEC 60127-2/
Ⅱ
Materials
Tube:
Glass Tube
End Caps:
Nickel-plated brass
Axial Leads: Nickel-plated caps
Tin-plated copper wires
Operating Temperature
-55
℃
to +125
℃
Storage Conditions
+10
℃
to +60
℃
Relative humidity:≤75% yearly average
without dew, maximum 30 days at 95%
Vibration Resistance
24 cycles at 15 min. each (60068-6)
10-60Hz at 0.75mm amplitude
60-2000Hz at 10g acceleration
Soldering Parameters
260
℃
.
≤
5 sec (Wave Soldering)
350
℃
.
≤
3 sec (Hand Soldering)
Soldering Peak:
260
℃
. 10 sec. (IEC 60068-20)
0.01
0.1
1
10
100
1000
0.10
1.00
10.00
100.00
1000.00
T
IM
E
IN
S
E
C
ON
DS
CURRENT IN AMPERES
0.
25
A
0.
315
A
0.
5A
0.
63
A
0.
8A
1A
1.
6A
2A
2.
5A
3.
15A
4A
5A
6
.3
A
8A
10
A
12.
5A
1
6A
Note
: (1) Permissible continuous operating current is 100% at ambient temperature of 23°C (73.4°F)
(2)The cURus certification by 125V and 250V; the VDE certification with 8A~10A by 125V; the others certification by 250V.
Time vs Current Characteristics: IEC 60127-2/
Ⅱ
Rated Current
150%
210%
275%
400%
1000%
250mA~6.3A
>1h
<30min
50ms-2s
10ms-300ms
≤20ms
8A~10A
>1h
<30min
50ms~2s
10ms~400ms
≤40ms
12.5A~16A
>30min
<30min
50ms~3s
10ms~400ms
≤50ms
Electrical Characteristics
Amp
Code
Rated
Current
Rated
Voltage
Max.
Voltage
Drop (mV)
Max. Power
Dissipation
(W)
Nominal
Melting
I²t(A²sec)
Breaking
capacity
Approvals
cURus
CQC
VDE
PSE
CCC
0250
250mA
125V AC
250V AC
1400
1.6
0.0256
10kA/125VAC
100A/250VAC
50-60Hz
Cosφ=0.7~0.8
○
○
○
○
○
0300
300mA
1300
1.6
0.1035
○
○
○
○
○
0315
315mA
1300
1.6
0.1089
●
○
●
○
●
0350
350mA
1300
1.6
0.1717
●
○
○
○
○
0375
375mA
1300
1.6
0.2058
●
○
○
○
○
0400
400mA
1200
1.6
0.24
●
○
○
○
●
0500
500mA
1000
1.6
0.1681
●
○
●
○
●
0630
630mA
650
1.6
0.7225
●
○
●
○
●
0750
750mA
240
1.6
0.813
●
○
○
○
○
0800
800mA
240
1.6
0.757
●
○
●
○
●
1100
1.00A
200
1.6
1.64
●
○
●
●
●
1125
1.25A
200
1.6
2.56
●
○
●
●
●
1150
1.50A
190
1.6
3.76
●
○
○
○
○
1160
1.60A
190
1.6
4
●
○
●
●
●
1200
2.00A
170
1.6
5.76
●
○
●
●
●
1250
2.50A
170
1.6
9.61
●
○
●
●
●
1300
3.00A
150
2.5
13.88
●
○
○
○
○
1315
3.15A
150
2.5
20.7
●
○
●
●
●
1350
3.50A
150
2.5
21.3
●
○
○
○
○
1400
4.00A
130
2.5
22.09
●
○
●
●
●
1500
5.00A
130
2.5
40.96
●
○
●
●
●
1630
6.30A
130
2.5
70.56
●
○
●
●
●
1700
7.00A
130
2.5
105.5
●
○
○
○
○
1800
8.00A
130
4
163.8
●
●
●
●
○
2100
10.00A
130
4
272.2
●
●
●
●
○
2150
12.50A
100
6
702.25
○
●
○
○
○
2160
16.00A
100
6
1332.3
○
●
○
○
○
Series
Amp Code
Supplementary Code
Qty
521
RoHS
Dimensions
(units in mm)
21.5±1.0
30
+1
-0
Max:6.0
Φ
0
.65/0.
8
0±0.
1
★
Note：★
250mA～7.0A ：
Φ
0.65mm
8.0A～10A ：
Φ
0.80mm
Ordering Information
Average Time Current (I-T) Curves
Note:
250mA~7.00A
：
Φ0.65mm
8.00A~12.50A:
Φ0.80mm
16.00A:
Φ1.00mm