Surface Mount Fuses
NANO2® > Slo-Blo® Fuse > 452/454 Series
452/454 Series Fuse
RoHS
PS
E
Description
The NANO2® Slo-Blo® fuse has enhanced inrush withstand
characteristics over the NANO2® 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
Agency Approvals
Agency
PS
E
Agency File Number
Ampere Range
E10480
0.375A - 12A
29862
0.375A - 12A
NBK030205-E10480B
1A - 5A
Electrical Characteristics for Series
% of Ampere Rating
Opening Time
100%
4 hours, Minimum
200%
1 sec., Min.; 60 sec., Max.
300%
0.2 sec., Min.; 3 sec., Max
800%
0.002 sec., Min.; 0.1 sec., Max.
• Small size
• Wide range of current
rating available (0.375A
to 12A)
• Wide operating
temperature range
• RoHS compliant and
Halogen Free
• UL Recognized to UL/
CSA/NMX UL 248-1 and
UL/CSA/NMX UL 248-14
• Conforms to DENAN’s
Appendix 3
Applications
• Notebook PC
• LCD/PDP TV
• LCD monitor
• LCD/PDP panel
• LCD backlight inverter
• Portable DVD player
• Power supply
• Networking
• PC server
• Cooling fan system
• Storage system
• Telecom system
• Wireless basestation
• White goods
• Game console
• Office Automation
equipment
• Battery charging circuit
protection
• Industrial equipment
Electrical Specifications by Item
Ampere Rating
(A)
Amp Code
Max
Voltage Rating
(V)
Interrupting
Rating
Agency Approvals
Nominal Cold
Nominal Melting
Resistance (Ohms)
I2t (A2sec)
PS
E
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
2.00
002.
125
0.0625
8.20
x
x
x
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
8
008.
75
0.0088
137.34
x
x
12
012.
75
0.0061
260.46
x
x
50A @ 125 VAC/VDC
300A @ 32 VDC
PSE: 100A @ 100 VAC
50A @ 72 VAC
50A @ 60 VDC
100A @ 75 VDC
Notes:
- l2t calculated at 8ms.
- Resistance is measured at 10% of rated current, 25ºC
© 2019 Littelfuse, Inc.
Specifications
are subject
to change
without notice.
Specifications are subject to change without notice. Application
testing
is strongly
recommended.
Revised: 11/21/19
Surface Mount Fuses
NANO2® > Slo-Blo® Fuse > 452/454 Series
Temperature Re-rating Curve
Average Time Current Curves
12.0A
8.00A
7.00A
5.00A
4.00A
3.50A
3.00A
2.50A
2.00A
1.50A
1.00A
750mA
500mA
375mA
TIME IN SECONDS
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
Pb – Free assembly
Pre Heat
- Temperature Min (Ts(min))
150°C
- Temperature Max (Ts(max))
200°C
- Time (Min to Max) (ts)
60 – 180 secs
Average ramp up rate (Liquidus Temp (TL) to peak
5°C/second max.
TS(max) to TL - Ramp-up Rate
Reflow
5°C/second max.
- Temperature (TL) (Liquidus)
217°C
- Temperature (tL)
60 – 150 seconds
Peak Temperature (TP)
260+0/–5 °C
Time within 5°C of actual peak Temperature (tp)
20 – 40 seconds
Ramp-down Rate
5°C/second max.
Time 25°C to peak Temperature (TP)
8 minutes max.
Do not exceed
260°C
Wave Soldering Parameters
tP
TP
Critical Zone
TL to TP
Ramp-up
TL
TS(max)
Temperature
Reflow Condition
tL
Ramp-down
TS(min)
25
Preheat
tS
time to peak temperature
(t 25ºC to peak)
Time
260°C Peak Temperature, 3 seconds max.
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/21/19
Surface Mount Fuses
NANO2® > Slo-Blo® Fuse > 452/454 Series
Product Characteristics
Product Marking
Body: Ceramic
Terminations:
Gold-plated Caps / Sn-dipped Silver Plated
Caps (452 Series)
Silver-plated Caps (454 Series)
Brand, Ampere Rating
Operating Temperature
-55°C to 125°C
Moisture Sensitivity Level
Level 1, J-STD-020
Vibration
Solderability
Insulation Resistance
(after Opening)
MIL-STD-202, Method 208
MIL-STD-202, Method 302, Test Condition A
(10,000 ohms minimum)
Moisture Resistance
Materials
Thermal Shock
Mechanical Shock
Salt Spray
Resistance to Soldering Heat
MIL-STD-202, Method 107, Test Condition
B, 5 cycles, -65°C / +125°C, 15 minutes @
each extreme
MIL-STD-202, Method 213, Test I:
Deenergized. 100G’s pk amplitude,
sawtooth wave 6ms duration, 3 cycles
XYZ+xyz = 18 shocks
MIL-STD-202, Method 201: 0.03”
amplitude, 10-55 Hz in 1 min. 2hrs each
XYZ=6hrs
MIL-STD-202, Method 106, 10 cycles
MIL-STD-202, Method 101, Test Condition
B (48hrs)
MIL-STD-202, Method 210, Test condition
B (10 sec at 260°C)
Part Numbering System
Dimensions
0452
2.69 ± .25
(.106")
6.10 ± .20
(.240")
T
F
2.69 ± .25
(.106")
1A
1.45
(.057")
Series
Amp Code
Refer to Amp Code column in the Electrical
Specifications table.
The dot is positioned at the end of the number
sequence with whole ratings and within for
fractional ratings.
Example: 0.375 Amp product is 0452.375MRL
(1 amp product shown)
6.86
(.270")
Quantity code
3.15
(.124")
Packaging code
M = 1000 pcs
N = 5000 pcs
R = Tape and Reel
L - RoHS Compliant & Halogen Free
(Gold Plated Caps)
SN-RoHS Compliant & Halogen Free
(Sn-dipped Caps)
2.95
(.116")
1.96
(.077")
Recommended pad layout
Notes:
452 series may be ordered as “RoHS and HF (Gold Plated Caps)” (“L” suffix).
454 series is available only as “RoHS and HF” version and does not require “L” suffix.
Please do not include “L” suffix within 454 series ordering instructions.
Additional Information
Packaging
Packaging Option
12mm Tape and Reel
12mm Tape and Reel
001. M R L
Packaging
Specification
EIA RS-481-1
(IEC 286, part 3)
EIA RS-481-1
(IEC 286, part 3)
Quantity
Quantity &
Packaging Code
5000
NR
1000
MR
Datasheet
452 Series
Resources
452 Series
Samples
452 Series
Datasheet
454 Series
Resources
454 Series
Samples
454 Series
Disclaimer Notice - Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications,
devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth
in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable
for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and
Conditions of Sale, unless otherwise agreed by Littelfuse. Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own
applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/21/19