521 Miniature Cartridge Fuse
20±0.5
Φ5.2
+0.1
-0.2
5,25±0,2
Main Characteristics
Miniature Cartridge fuse;
Fast-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)
T
ime
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~600ms ≤80ms
Series
Amp Code Supplementary Code Qty
521
RoHS
Dimensions
(units in mm)
21.5±1.0
30
+1
-0
Max:6.0
Φ0.65/0.80±0.1
★
Note：★
250mA
7.0A
Φ
0.65mm
8.0A
10A
Φ
0.80mm
Ordering Information
Note:
250mA~7.00A：Φ0.65mm
8.00A~12.50A: Φ0.80mm
16.00A: Φ1.00mm
TM
Intertek
01
4
IATF 16949
ISO 9001-2015
Na
tional High-tech Enterprise
SC 32C National Technical
Committe Member of China
Intertek ISO 9001 Certificated Company
Intertek ISO 14001 Certificated Company
Intertek QC 080000 Certificated Company
NQA IATF 16949 Certificated Company
国 家 高 新 技 术 企 业
SC 32C 国内专家组成员单位
I S O 9 0 0 1 认 证 企 业
I S O 1 4 0 0 1 认 证 企 业
Q C 0 8 0 0 0 0 认 证 企 业
I A T F 1 6 9 4 9 认 证 体 系
Sales Contact
sls01@beterfuse.com
Technical Support
Kenny@betterfuse.com
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 and 250V;
the others certification by 250V.
（3） The current values used for calculating I2T should be within the standard range of 8ms ~ 10ms.
Electrial Characteristics at 25℃
Amp
Code
Rated
Current
Rated
Voltage
Voltage
Drop
Max(mV)
Max
Power
Dissipation
(W)
Typical
Code
Resistance
(mΩ)
Nominal
Melting
I²T (A²sec)
Breaking
Capacity
Approvals
cURus CQC VDE PSE CCC
0250 250mA
125V AC
250V AC
1400 1.6
570
0.026
10KA/125V AC
100A/250V AC
○○○○○
0315 315mA 1300 1.6
860
0.109 ●○●○●
0400 400mA 1200 1.6
540
0.240 ●○○○●
0500 500mA 1000 1.6
220
0.168 ●○●○●
0630 630mA 650 1.6
285
0.723 ●○●○●
0800 800mA 240 1.6
120
0.757 ●○●○●
1100 1.00A 200 1.6
101
1.64 ●○●●●
1125 1.25A 200 1.6
65.0
2.56 ●○●●●
1150 1.50A 190 1.6
51.47
3.76 ●○○○○
1160 1.60A 190 1.6
50.35
4.00 ●○●●●
1200 2.00A 170 1.6
40.65
5.76 ●○●●●
1250 2.50A 170 1.6
30.00
9.61 ●○●●●
1300 3.00A 150 2.5
25.00
13.9 ●○○○○
1315 3.15A 150 2.5
24.00
20.7 ●○●●●
1400 4.00A 130 2.5
17.60
22.1 ●○●●●
1500 5.00A 130 2.5
13.50
41.0 ●○●●●
1630 6.30A 130 2.5
10.60
70.6 ●○●●●
1700 7.00A 130 2.5
9.48
106 ●○○○○
1800 8.00A 130 4
7.50
164 ●●●●○
2100 10.00A 130 4
6.30
272 ●●●●○
2125 12.50A 100 6
3.80
702 ○●○○○
2160 16.00A 100 6
3.10
1332 ○●○○○
0.25A
0.315A
0.5A
0.63A
0.8A
1A
1.6A
2A
2.5A
3.15A
4A
5A
6.3A
8A
10A
12.5A
16A
0.4A
1.25A
1.5A
3A
7A