53
Cartridge and Axial Lead Fuses
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Revised: July 18, 2008
374 Series
TR5® > Time Lag > 374 Series
374 Series
Pb
RoHS
Agency Approvals
Agency Agency File Number Ampere Range
File number:
E 67006 50mA - 6.3A
®
Certification:
51378 50mA - 6.3A
File number:
E 67006 8A - 10A
Features
Electrical Characteristics
t -FBEoGSFF
t 3FEVDFE1$#TQBDF
SFRVJSFNFOUT
t %JSFDUTPMEFSBCMFPS
QMVHoJOWFSTJPOT
t *OUFSOBUJPOBMMZBQQSPWFE
t -PXJOUFSOBMSFTJTUBODF
t 4IPDLTBGFDBTJOH
t 7JCSBUJPOSFTJTUBOU
t )BMPHFOoGSFF
t %FTJHOFEUP6-o
GPS5JNFoMBHGVTFT
t 3P)4DPNQMJBOUBOE
-FBEoGSFF
t"WBJMBCMFGSPNN"
to 10A
% of Ampere
Rating Opening Time
100% )PVSTMin.
 4FDPOETMax.
Applications
®
t 5FMFDPNFRVJQNFOU
t %BUBQSPDFTTJOH
FRVJQNFOU
t *OQVUPVUQVUNPEVMFT
t 1PXFSTVQQMJFT
t )PVTFIPMEBQQMJDBODFT
t .FEJDBMFRVJQNFOU
Description
5IF53® 4FSJFTBSFUJNFoMBH7SBUFEGVTFT
UIBUBSFEFTJHOFEJOBDDPSEBODFUP6-o5IFTF
GVTFTBSFJOUFOEFEGPSBSBOHFPGBQQMJDBUJPOTTVDIBT
QSPUFDUJPOPGFMFDUSJDBQQMJBODFTFMFDUSPOJDFRVJQNFOU
BOEDPNQPOFOUQBSUTOPSNBMMZJOUFOEFEGPSJOEPPSVTF
This series replaces the 665 LT–5 Series Fuses.
54
Cartridge and Axial Lead Fuses
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Revised: July 18, 2008
374 Series
TR5® > Time Lag > 374 Series
Average Time Current CurvesTemperature Derating Curve
23ºC
PERCENT OF RATING
AMBIENT TEMPERATURE
-40ºC
-104ºF
-20ºC
-68ºF
-0ºC
-32ºF
20ºC
68ºF
40ºC
104ºF
60ºC
140ºF
80ºC
176ºF
20
40
60
80
100
120
140
0
TIME LAG DE-RATING CURVE
Electrical Characteristics
Rated
Current
Amp
Code
Voltage
Rating Breaking Capacity
Voltage
Drop 1.0 x IN
max. (mV)
Power
Dissipation
1.5 x IN
max. (mV)
Melting Integral
10 x IN
Min. (As)
Agency Approvals
®
50mA 0050 7
"7"$)[
DPTJ = 1.0
900  0.0056 x x
63mA 0063 7 800 50 0.009 x x
80mA 0080 7 700 55  xx
100mA 0100 7 600 60  xx
N"  7 550 70  xx
160mA 0160 7  80 0.058 x x
N"  7 390 80 0.1 x x
N"  7 350 90 0.17 x x
315mA 0315 7 300 95  xx
N"  7  100  xx
500mA 0500 7  110 0.6 x x
630mA 0630 7  135 0.75 x x
800mA 0800 7 160 130 0.98 x x
1. 0 0 A 110 0 7 155 155  xx
"  7  185  xx
1.60A 1160 7 130   xx
"  7   7. 5 x x
"  7  300  xx
3.15A 1315 7 110 350  xx
"  7 10 0  36 x x
5.00A 1500 7 95  59 x x
6.30A 1630 7 90 570 110 x x
8.00A1 1800 7 80 1000 150 x
10.00A1 7 90   x
/PUFNFBOTUIFOVNCFSPOFXJUIUXPEFDJNBMQMBDFTNFBOTUIFOVNCFSPOFUIPVTBOE
CURRENT IN AMPERES
TIME IN SECONDS
0.001
0.010
0.100
1
10
100
1000
10000
100000
0.100 1 10 1000.02
0.050A
0.063A
0.080A
0.100A
0.125A
0.160A
0.200A
0.250A
0.315A
0.400A
0.500A
0.630A
0.800A
1.00A
1.25A
1.60A
2.00A
2.50A
3.15A
4.00A
5.00A
6.30A
8.00A
10.00A
55
Cartridge and Axial Lead Fuses
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Revised: July 18, 2008
374 Series
TR5® > Time Lag > 374 Series
Materials
#BTF$BQ#SPXO5IFSNPQMBTUJD
1PMZBNJEF1"6-7
3PVOE1JOT$PQQFS5JOQMBUFE
Lead Pull Strength /&/
Solderability $õ4FD8BWF
$õ4FD4PMEFSJOHJSPO
Soldering Heat
Resistance $4FD*&$
Product Characteristics
Operating Temperature $UP$DPOTJEFSEFSBUJOH
Climatic Category $$EBZT
&/
Stock Conditions
$UP$
3)õZFBSMZBWFSBHFXJUIPVU
EFXNBYJNVNWBMVFGPSEBZT
95%
Vibration Resistance
DZDMFTBUNJOFBDI
&/
)[BUNNBNQMJUVEF
)[BU(TBDDFMFSBUJPO
Dimensions
8.5
0.5 min
max. 8L
0.6
5.08
1 +0.1
)PMFTJO1$#
-POH-FBET-NN
4IPSU-FBET-NN
Part Numbering System
Packaging Code Packing Option Quantity
000 5BQF"NNPQBDL 
 4IPSU-FBET 
Packaging
374 0050
Series
Amp. Code
000
Packaging Code
(See Electrical Characteristics Chart)
000 Tape/Ammopack (1,000 pcs.)
041 Short Leads - Bulk (1,000 pcs.)
Soldering Parameters
Dwell Time
0
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
Time (Seconds)
Temperature (°C) - Measured on bottom side of board
Cooling Time
Preheat Time
Wave Parameter Lead-Free Recommendation
Preheat:
%FQFOETPO'MVY"DUJWBUJPO5FNQFSBUVSF 5ZQJDBM*OEVTUSZ3FDPNNFOEBUJPO
5FNQFSBUVSF.JOJNVN 100° C
5FNQFSBUVSF.BYJNVN 150° C
1SFIFBU5JNF TFDPOET
Solder Pot Temperature: ° $.BYJNVN
Solder Dwell Time: TFDPOET
Recommended Hand-Solder Parameters:
4PMEFS*SPO5FNQFSBUVSF¡$¡$
)FBUJOH5JNFTFDPOETNBY
Note: These devices are not recommended for IR or
Convection Reflow process.
Recommended Process Parameters: