Littelfuse 045203.5MRL

Cross Number:

Item Description: FUSE BRD MNT 3.5A 125VAC/VDCSMD

Qty Price
1 - 470 $0.52800
471 - 1,210 $0.41200
1,211 - 2,770 $0.36000
2,771 - 4,460 $0.33600
4,461 + $0.31200


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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

61
© 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Surface Mount Fuses
452/454 Series
NANO
2®
> Slo-Blo
®
> 452/454 Series
452/454 Series
Please refer to www.littelfuse.com/series/452.html
or /454.html for current information.
452/454 Series Fuse
Description
The NANO
2
Slo-Blo
®
fuse has enhanced inrush withstand
characteristics over the NANO
2
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
t 5JNF-BH4MP#MP
t 4NBMMTJ[F
t 8JEFSBOHFPGDVSSFOU
SBUJOHBWBJMBCMFN"
UP"
t 8JEFPQFSBUJOH
temperature range
t -PXUFNQFSBUVSF
de-rating
t 3P)4DPNQMJBOU
t )BMPHFO'SFF
Electrical Characteristics for Series
% of Ampere
Rating
Opening Time
100% 4 hours, Minimum
200% 1 sec., Min.; 60 sec., Max.
 TFD.JOTFD.BY
800% 0.02 sec., Min.; 0.1 sec., Max.
PS
E
Electrical Specications by Item
Ampere
Rating
(A)
Amp Code
Max
Voltage
Rating
(V)
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
Nominal
Melting
I
2
t (A
2
sec)
Agency Approvals
PS
E
  
BNQFSFT!7"$7%$
BNQFSFT!7%$
14&BNQFSFT!7"$
1.2000 0.101 x x
    0.240 x x
    0.904 x x
001. 001.   1.98 x x x
     xxx
2.00 002.   8.20 x x x
     xxx
    20.16 x x x
   0.0224  xxx
4.00 004.  0.0186  xxx
     xxx
  
BNQFSFT!7"$
BNQFSFT!7%$
  xx
8 008. 
BNQFSFT!7"$
BNQFSFT!7%$
0.0088  xx
12 012.  0.0061 260.46 x x
Applications
t /PUFCPPL1$
t -$%1%157
t -$%NPOJUPS
t -$%1%1QBOFM
t -$%CBDLMJHIUJOWFSUFS
t 1PSUBCMF%7%QMBZFS
t 1PXFSTVQQMZ
t /FUXPSLJOH
t 1$TFSWFS
t $PPMJOHGBOTZTUFN
t 4UPSBHFTZTUFN
t 5FMFDPNTZTUFN
t 8JSFMFTTCBTFTUBUJPO
t 8IJUFHPPET
t (BNFDPOTPMF
t 0GåDF"VUPNBUJPO
equipment
t #BUUFSZDIBSHJOHDJSDVJU
protection
t *OEVTUSJBMFRVJQNFOU
t .FEJDBMFRVJQNFOU
t "VUPNPUJWF
Agency Approvals
AGENCY AGENCY FILE NUMBER AMPERE RANGE
E10480 375mA - 12A
LR29862 375mA - 12A
PS
E
NBK030205-E10480B 1A - 5A
Notes:
- l
2
t calculated at 8ms.
- Resistance is measured at 10% of rated current, 25ºC
Revised: May 3, 2011
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
62
© 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Surface Mount Fuses
452/454 Series
NANO
2®
> Slo-Blo
®
> 452/454 Series
Please refer to www.littelfuse.com/series/452.html
or /454.html for current information.
Average Time Current Curves
Reow Condition Pb – Free assembly
Pre Heat
- Temperature Min (T
s(min)
) ¡$
- Temperature Max (T
s(max)
) ¡$
- Time (Min to Max) (t
s
) 60 – 120 secs
Average ramp up rate (Liquidus Temp
(T
L
) to peak
¡$TFDPOENBY
T
S(max)
to T
L
- Ramp-up Rate ¡$TFDPOENBY
Reow
- Temperature (T
L
) (Liquidus) ¡$
- Temperature (t
L
) 60 – 90 seconds
Peak Temperature (T
P
) 

¡$
Time within 5°C of actual peak
Temperature (t
p
)
20 – 40 seconds
Ramp-down Rate ¡$TFDPOENBY
Time 25°C to peak Temperature (T
P
) 8 minutes max.
Do not exceed ¡$
Wave Soldering Parameters
¡$1FBL
Temperature,
TFDPOETNBY
Soldering Parameters
Temperature Rerating Curve
Note:
 %FSBUJOHEFQJDUFEJOUIJTDVSWFJTJOBEEJUJPOUPUIFTUBOEBSEEFSBUJOHPGGPS
continuous operation.
Time
Temperature
T
P
T
L
T
S(max)
T
S(min)
25
t
P
t
L
t
S
time to peak temperature
(t 25ºC to peak)
Ramp-down
Ramp-up
Preheat
Critical Zone
T
L
to T
P
0.01
0.1
1
10
100
0.1 1 10 100 1000
TIME IN SECONDS
CURRENT IN AMPS
375mA
500mA
1.00A
1.50A
2.00A
2.50A
3.00A
3.50A
4.00A
5.00A
7.00A
750mA
8.00A
12.0A
63
© 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Surface Mount Fuses
452/454 Series
NANO
2®
> Slo-Blo
®
> 452/454 Series
452/454 Series
Please refer to www.littelfuse.com/series/452.html
or /454.html for current information.
Materials
#PEZ$FSBNJD
5FSNJOBUJPOT(PMEQMBUFE$BQT
4JMWFSQMBUFE$BQT
Product Marking #SBOE"NQFSF3BUJOH
Operating
Temperature
¡$UP¡$
Moisture
Sensitivity Level
-FWFM+45%$
Solderability .*-45%.FUIPE
Insulation
Resistance (after
Opening)
.*-45%.FUIPE5FTU$POEJUJPO
"PINTNJOJNVN
Thermal Shock
.*-45%.FUIPE5FTU
$POEJUJPO#DZDMFT¡$
¡$NJOVUFT!FBDIFYUSFNF
Mechanical Shock
.*-45%.FUIPE5FTU*
%FFOFSHJ[FE(TQLBNQMJUVEF
TBXUPPUIXBWFNTEVSBUJPO
DZDMFT9:;YZ[TIPDLT
Vibration
.*-45%.FUIPEw
BNQMJUVEF)[JONJOIST
FBDI9:;IST
Moisture Resistance .*-45%.FUIPEDZDMFT
Salt Spray
.*-45%.FUIPE5FTU
$POEJUJPO#IST
Resistance to Soldering
Heat
.*-45%.FUIPE5FTU
DPOEJUJPO#TFDBU¡$
Product Characteristics
1 A
T
6.86
(.270")
3.15
(.124")
2.95
(.116")
1.96
(.077")
2.69
(.106")
2.69
(.106")
1.45
(.057")
6.10
(.240")
Recommended pad layout
F
Dimensions
Packaging
Part Numbering System
Packaging Option Packaging Specication Quantity
Quantity &
Packaging Code
NN5BQFBOE3FFM &*"34*&$QBSU  /3
NN5BQFBOE3FFM &*"34*&$QBSU 1000 .3
0452 001. M R L
SERIES
AMP Code
QUANTITY Code
PACKAGING Code
.QDT
/QDT
35BQFBOE3FFM
RoHS Compliant & Halogen Free
3FGFSUP"NQ$PEFDPMVNOJOUIF
&MFDUSJDBM4QFDJåDBUJPOTUBCMF
The dot is positioned at the end of the
number sequence with whole ratings
and within for fractional ratings.
Example:"NQQSPEVDUJT
.375.3-BNQQSPEVDUTIPXO
NOTE: “L” sufx applies to 452 series only
 TFSJFT NBZ CF PSEFSFE BT FJUIFS i3P)4 BOE )'w i-w TVGåY PS OPO3P)4 OP
TVGåYWFSTJPO
TFSJFTJTBWBJMBCMFPOMZBTi3P)4BOE)'wWFSTJPOBOEEPFTOPUSFRVJSFi-wTVGåY
1MFBTFEPOPUJODMVEFi-wTVGåYXJUIJOTFSJFTPSEFSJOHJOTUSVDUJPOT

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13197 Sandoval Street
Santa Fe Springs, CA 90670

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(Deadline for next day shipment 2:00pm PST)

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Industry since 1986

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