452, 454 Series Datasheet by Littelfuse Inc.

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© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/21/19
Surface Mount Fuses
NANO > Slo-Blo® Fuse > 452/454 Series
452/454 Series Fuse
Description
The NANO Slo-Blo® fuse has enhanced inrush withstand
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
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
RoHS
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.
PS
E
Electrical Specifications by Item
Ampere Rating
(A) Amp Code
Max
Voltage Rating
(V)
Interrupting
Rating
Nominal Cold
Resistance (Ohms)
Nominal Melting
I2t (A2sec)
Agency Approvals
PS
E
0.375 .375 125
50A @ 125 VAC/VDC
300A @ 32 VDC
PSE: 100A @ 100 VAC
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
0 01. 0 01. 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. 0 0 0 0 7. 75 50A @ 72 VAC
50A @ 60 VDC
100A @ 75 VDC
0.0105 123.83 x x
8 008. 75 0.0088 137.34 x x
12 012. 75 0.0061 260.46 x x
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
Agency Approvals
Agency Agency File Number Ampere Range
E10480 0.375A - 12A
29862 0.375A - 12A
PS
ENBK030205-E10480B 1A - 5A
Notes:
- l2t calculated at 8ms.
- Resistance is measured at 10% of rated current, 25ºC
Specifications are subject to change without notice. Application testing is strongly recommended.
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© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/21/19
Surface Mount Fuses
NANO > Slo-Blo® Fuse > 452/454 Series
Average Time Current Curves
0.01
0.1
1
10
100
0.1 1 10 100 1000
TIME IN SECONDS
CURRENT IN AMPS
375mA
500mA
1.00A
1.50A
2.00A
2.50A
3.00A
3.50A
4.00A
5.00A
7.00A
750mA
8.00A
12.0A
Reflow Condition 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 5°C/second max.
Reflow - 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 260°C Peak Temperature, 3 seconds max.
Soldering Parameters
Temperature Re-rating Curve
Note:
1. Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation.
Time
Temperature
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
(t 25ºC to peak)
Ramp-down
Ramp-up
Preheat
Critical Zone
TL to TP
0452 001. M IL yam, s u III e II. n L A m %—u
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/21/19
Surface Mount Fuses
NANO > Slo-Blo® Fuse > 452/454 Series
Materials
Body: Ceramic
Terminations:
Gold-plated Caps /
Sn-dipped Silver Plated
Caps (
452
Series)
Silver-plated Caps (454 Series)
Product Marking Brand, Ampere Rating
Operating Temperature -55°C to 125°C
Moisture Sensitivity Level Level 1, J-STD-020
Solderability MIL-STD-202, Method 208
Insulation Resistance
(after Opening)
MIL-STD-202, Method 302, Test Condition A
(10,000 ohms minimum)
Thermal Shock
MIL-STD-202, Method 107, Test Condition
B, 5 cycles, -65°C / +125°C, 15 minutes @
each extreme
Mechanical Shock
MIL-STD-202, Method 213, Test I:
Deenergized. 100G’s pk amplitude,
sawtooth wave 6ms duration, 3 cycles
XYZ+xyz = 18 shocks
Vibration
MIL-STD-202, Method 201: 0.03”
amplitude, 10-55 Hz in 1 min. 2hrs each
XYZ=6hrs
Moisture Resistance MIL-STD-202, Method 106, 10 cycles
Salt Spray MIL-STD-202, Method 101, Test Condition
B (48hrs)
Resistance to Soldering Heat MIL-STD-202, Method 210, Test condition
B (10 sec at 260°C)
Product Characteristics
1 A
T
6.86
(.270")
3.15
(.124")
2.95
(.116")
1.96
(.077")
2.69 ± .25
(.106")
2.69 ± .25
(.106")
1.45
(.057")
6.10 ± .20
(.240")
Recommended pad layout
F
Dimensions
Packaging
Part Numbering System
Packaging Option Packaging
Specification Quantity Quantity &
Packaging Code
12mm Tape and Reel EIA RS-481-1
(IEC 286, part 3) 5000 NR
12mm Tape and Reel EIA RS-481-1
(IEC 286, part 3) 1000 MR
0452 001. M R L
Series
Amp Code
Quantity code
Packaging code
M = 1000 pcs
N = 5000 pcs
R = Tape and Reel
L - RoHS Compliant & Halogen Free
(Gold Plated Caps)
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)
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.
SN-RoHS Compliant & Halogen Free
(Sn-dipped Caps)
452 Series
454 Series
452 Series
454 Series
452 Series
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.
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