Revised: May 12, 2009
143
© 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Radial Lead Fuses
372 Series
Please refer to www.littelfuse.com/series/372.html for current information.
TR5® > Time-Lag > 372 Series
372 Series
372 Series, TR5®, Time-Lag Fuse
Agency Approvals
Agency Agency File Number Ampere Range
5007679-1170-0003/82447 50mA - 4A
5007679-1170-0004/82452 5A - 6.3A
JET1896-31007-2002 1A - 5A
709066 50mA - 6.3A
E67006 40mA - 6.3A
SU05024-7010
SU05024-7011
SU05024-7006
SU05024-7007
SU05024-7008
SU05024-7009
SU05024-7012
50mA - 100mA
125mA - 800mA
1A - 2.5A
3.15A
4A
5A
6.3A
CQC07012021162 5A - 6.3A
2007010207240346 40mA - 4A
Features
Electrical Characteristics
t -FBEGSFF
t 3FEVDFE1$#TQBDF
SFRVJSFNFOUT
t %JSFDUTPMEFSBCMFPS
QMVHJOWFSTJPOT
t *OUFSOBUJPOBMMZ
BQQSPWFE
t -PXJOUFSOBMSFTJTUBODF
t 4IPDLTBGFDBTJOH
t 7JCSBUJPOSFTJTUBOU
t )BMPHFOGSFF
t "WBJMBCMFGSPNN"
UP"
% of Ampere
Rating Opening Time
150% )PVSMin.
210% .JOVUFTMax.
275% NTMin.4FDMax.
400% NTMin.4FDMax.
1000% NTMin.NTMax.
Applications
5IF4FSJFTBSF53®UJNF-BHUZQF7SBUFEGVTFT
UIBUBSFEFTJHOFEJOBDDPSEBODFUP*&$
t #BUUFSZ$IBSHFST
t $POTVNFSFMFDUSPOJDT
t 1PXFSTVQQMJFT
t *OEVTUSJBM$POUSPMMFST
Description
Revised: May 12, 2009
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
144 © 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Radial Lead Fuses
372 Series
Please refer to www.littelfuse.com/series/372.html for current information.
TR5® > Time-Lag > 372 Series
Average Time Current CurvesTemperature Rerating Curve
0
20
40
60
80
100
120
140
-40-20 0 20406080
AMBIENT TEMPERATURE (°C)
PERCENT OF RATING
23°C
Electrical Characteristics
Amp
Code
Rated
Current
Voltage
Rating Breaking Capacity
Voltage
Drop
1.0 x IN
max. (mV)
Power
Dissipation
1.5 x IN
max. (mW)
Melting
Integral
10 x IN
min. (A2s)
Agency Approvals
0040 40mA 7
"7"$1
)[DPTϕ = 1.0
900 90 0.009 X
0050 50mA 7 500 70 0.01 XX X X X
0063 63mA 7 400 80 0.02 XX X X X
0080 80mA 7 370 100 0.023 XX X X X
0100 100mA 7 300 110 0.047 XX X X X
0125 125mA 7 260 120 0.066 XX X X X
0160 160mA 7 200 130 0.14 XX X X X
0200 200mA 7 170 140 0.20 XX X X X
0250 250mA 7 150 150 0.28 XX X X X
0315 315mA 7 140 160 0.36 XX X X X
0400 400mA 7 130 170 0.9 XX X X X
0500 500mA 7 125 180 1.3 XX X X X
0630 630mA 7 120 200 2.5 XX X X X
0800 800mA 7 110 220 3.8 XX X X X
1100 1.00A 7 110 360 5.5 XX X X X X
1125 1.25A 7 95 450 9 XX X X X X
1160 1.60A 7 95 450 14 XX X X X X
1200 2.00A 7 85 600 23 XX X X X X
1250 2.50A 7 80 700 35 XX X X X X
1315 3.15A 7 80 1100 60 XX X X X X
1400 4.00A 7 "7"$ 75 1200 95 XX X X X X
1500 5.00A 7 "7"$ 80 1300 94 G X X X CQC X
1630 6.30A*7 58 1250 105 G X X CQC X
 1FS6-BQQSPWFECSFBLJOHDBQBDJUZJT"BU7
 $POEVDUJOHQBUINJONN2
(&YQFSU3FQPSU
/PUFNFBOTUIFOVNCFSPOFXJUIUXPEFDJNBMQMBDFTNFBOTUIFOVNCFSPOFUIPVTBOE
CURRENT IN AMPERES
TIME IN SECONDS
0.001
0.010
0.100
1
10
100
1000
10000
100000
0.100 1 10 1000.02
0.040A
0.050A
0.063A
0.080A
0.100A
0.125A
0.160A
0.200A
0.250A
0.315A
0.400A
0.500A
0.630A
0.800A
1.00A
1.25A
1.60A
2.00A
2.50A
3.15A
4.00A
5.00A
6.30A
Revised: May 12, 2009
145
© 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Radial Lead Fuses
372 Series
Please refer to www.littelfuse.com/series/372.html for current information.
TR5® > Time-Lag > 372 Series
372 Series
Materials
#BTF$BQ#SPXO5IFSNPQMBTUJD
1PMZBNJEF1"6-7
3PVOE1JOT$PQQFS5JOQMBUFE
Lead Pull Strength 10 N (EN 60068-2-21)
Solderability $õT8BWF
$õT4PMEFSJOH*SPO
Soldering Heat
Resistance
$T*&$
$T4PMEFSJOH*SPO
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
(EN 60068-2-6)
)[BUNNBNQMJUVEF
)[BU(TBDDFMFSBUJPO
Soldering Parameters - Wave Soldering
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: 260° $.BYJNVN
Solder Dwell Time: TFDPOET
Recommended Hand-Solder Parameters:
4PMEFS*SPO5FNQFSBUVSF¡$¡$
)FBUJOH5JNFTFDPOETNBY
Note: These devices are not recommended for IR or
Convection Reow process.
Recommended Process Parameters:
Revised: May 12, 2009
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
146 © 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Radial Lead Fuses
372 Series
Please refer to www.littelfuse.com/series/372.html for current information.
TR5® > Time-Lag > 372 Series
Dimensions
8.5
0.5 min
max. 8L
0.6
5.08
1 +0.1
-POH-FBET-NN
4IPSU-FBET-NN
Part Numbering System
Packaging
Packaging Option Packaging Specication Quantity Quantity &
Packaging Code Taping Width
372 Series
5BQF"NNPQBDL N/A  0000 N/A
4IPSU-FBET N/A  0411 N/A
4IPSU-FBET N/A 200 0431 N/A
NN-FBET N/A  0511 N/A
0001372 xxxx
Packaging Code
Amp Code
Series
0000 Tape/Ammopack (1,000 pcs.)
0411 Short Leads - Bulk (1,000 pcs.)
0431 Short Leads - Bulk (200 pcs.)
0511 3.3 mm Leads - Bulk (1000 pcs.)
Refer to Amp Code column of
Electrical Characteristics Table