Surface Mount Fuses
2
NANO > Slo-Blo Fuse > 452/454 Series
PS
RoHS
E
452/454 Series Fuse
Description
2
The NANO Slo-Blo fuse has enhanced inrush withstand
2
characteristics over the NANO Fast-Acting fuse. The
unique time delay feature of this fuse design helps solve
the problem of nuisance opening by accommodating
inrush currents that normally cause a fast-acting fuse to
open.
Features
Small size UL Recognized to UL/
CSA/NMX UL 248-1 and
Wide range of current
UL/CSA/NMX UL 248-14
rating available (0.375A
to 12A)
Conforms to DENANs
Wide operating Appendix 3
Agency Approvals
temperature range
Agency Agency File Number Ampere Range RoHS compliant and
Halogen Free
E10480 0.375A - 12A
29862 0.375A - 12A
PS
NBK030205-E10480B 1A - 5A
E Applications
Notebook PC Storage system
LCD/PDP TV Telecom system
LCD monitor Wireless basestation
Electrical Characteristics for Series
LCD/PDP panel White goods
% of Ampere Rating Opening Time LCD backlight inverter Game console
Portable DVD player Office Automation
100% 4 hours, Minimum
equipment
Power supply
200% 1 sec., Min.; 60 sec., Max.
Battery charging circuit
300% 0.2 sec., Min.; 3 sec., Max Networking
protection
800% 0.002 sec., Min.; 0.1 sec., Max.
PC server
Industrial equipment
Cooling fan system
Electrical Specifications by Item
Agency Approvals
Max
Ampere Rating Interrupting Nominal Cold Nominal Melting
Amp Code Voltage Rating
2 2
PS
(A) Rating Resistance (Ohms) I t (A sec)
E
(V)
0.375 .375 125 1.2000 0.101 x x
0.500 .500 125 0.7000 0.240 x x
0.750 .750 125 0.3600 0.904 x x
001. 001. 125 0.2250 1.98 x x x
1.50 01.5 125 0.0930 3.65 x x x
50A @ 125 VAC/VDC
2.00 002. 125 300A @ 32 VDC 0.0625 8.20 x x x
PSE: 100A @ 100 VAC
2.50 02.5 125 0.0450 15.0 x x x
3.00 003. 125 0.0340 20.16 x x x
3.50 03.5 125 0.0224 26.53 x x x
4.00 004. 125 0.0186 34.40 x x x
5.00 005. 125 0.0136 53.72 x x x
7.00 007. 75 0.0105 123.83 x x
50A @ 72 VAC
50A @ 60 VDC
8 008. 75 0.0088 137.34 x x
100A @ 75 VDC
12 012. 75 0.0061 260.46 x x
Notes:
2
- l t calculated at 8ms.
- Resistance is measured at 10% of rated current, 25C
2019 Littelfuse, Inc.
Specifications are subject to change without notice. Application testing is strongly recommended.Specifications are subject to change without notice.
Revised: 11/21/1912.0A
8.00A
7.00A
5.00A
4.00A
3.50A
3.00A
2.50A
2.00A
1.50A
1.00A
750mA
500mA
375mA
Surface Mount Fuses
2
NANO > Slo-Blo Fuse > 452/454 Series
Temperature Re-rating Curve Average Time Current Curves
100
10
1
Note:
1. Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation.
0.1
0.01
0.1 1 10 100 1000
CURRENT IN AMPS
Soldering Parameters
Reflow Condition Pb Free assembly
t
P
- Temperature Min (T ) 150C
s(min) T
P
Critical Zone
Ramp-up
T to T
L P
Pre Heat - Temperature Max (T ) 200C
s(max)
- Time (Min to Max) (t ) 60 180 secs T
L
s
t
L
T
Average ramp up rate (Liquidus Temp (T ) to peak 5C/second max.
S(max)
L
T to T - Ramp-up Rate 5C/second max.
S(max) L Ramp-down
Preheat
- Temperature (T ) (Liquidus) 217C
L
T
Reflow
S(min)
- Temperature (t ) 60 150 seconds
t
L
S
+0/5
Peak Temperature (T ) 260 C
P
25
Time within 5C of actual peak Temperature (t ) 20 40 seconds
p
time to peak temperature
Time
Ramp-down Rate 5C/second max.
(t 25C to peak)
Time 25C to peak Temperature (T ) 8 minutes max.
P
Do not exceed 260C
Wave Soldering Parameters 260C Peak Temperature, 3 seconds max.
2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/21/19
TIME IN SECONDS
Temperature