0437002.WR [LITTELFUSE]
Surface Mount Fuses Ceramic Fuse > 437 Series; 表面贴装保险丝陶瓷保险丝\u003e 437系列
| 型号： | 0437002.WR |
| 厂家： | 
LITTELFUSE |
| 描述： | Surface Mount Fuses Ceramic Fuse > 437 Series |
| 文件： | 总3页 (文件大小：535K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Surface Mount Fuses
Ceramic Fuse > 437 Series
437 Series – 1206 Fast-Acting Fuse
Description
This 100% Lead-free, RoHS compliant and Halogen-free
fuse series has been designed specifically to provide over
current protection to circuits that see high working ambient
temperatures (up to 150ºC).
The general design ensures excellent temperature stability
and performance reliability.
In addition to this, the high I²t values typical of the
Littelfuse Ceramic Fuse family ensure high inrush current
withstand capability.
Features
Agency Approvals
•ꢀ OperatingꢀTemperatureꢀ •ꢀ Suitableꢀforꢀbothꢀleadedꢀ
Agency
Agency File number
Ampere rAnge
0.250A ~ 8A
from -55ºC to +150ºC
and lead-free reflow /
wave soldering
e10480
•ꢀ 100%ꢀLead-freeꢀandꢀ
RoHS compliant
lr29862
0.250A ~ 8A
Applications
Electrical Characteristics for Series
•ꢀ AutomotiveꢀElectronics
•ꢀ LCDꢀDisplays
•ꢀ Servers
•ꢀ Printers
•ꢀ Scanners
•ꢀ DataꢀModems
% of Aꢀꢁꢂꢃꢂ
Aꢀꢁꢂꢃꢂ ratꢄꢅꢆ
OꢁꢂꢅꢄꢅꢆTꢄꢀꢂ at 25ºc
ratꢄꢅꢆ
100%
250%
350%
350%
250mA - 8A
750mA - 8A
4 hours, Minimum
5 seconds, Maximum
5 seconds, Maximum
1 second, Maximum
250mA -500mA
750mA - 8A
Electrical Specifications by Item
Aꢆꢂꢅꢉꢊ Aꢁꢁꢃovaꢇs
Aꢀꢁꢂꢃꢂ
ratꢄꢅꢆ
(A)
max.
Voꢇtaꢆꢂ
ratꢄꢅꢆ (V)
noꢀꢄꢅaꢇ
noꢀꢄꢅaꢇ noꢀꢄꢅaꢇ Voꢇtaꢆꢂ noꢀꢄꢅaꢇ powꢂꢃ
Aꢀꢁ
codꢂ
iꢅtꢂꢃꢃꢈꢁtꢄꢅꢆ ratꢄꢅꢆ
rꢂsꢄstaꢅꢉꢂ mꢂꢇtꢄꢅꢆ i2t Dꢃoꢁ At ratꢂd
Dꢄssꢄꢁatꢄoꢅ At
(Ohꢀs)2
(A2Sꢂꢉ.)3
cꢈꢃꢃꢂꢅt (V)4
ratꢂd cꢈꢃꢃꢂꢅt (W)
250mA .250
375mA .375
500mA .500
750mA .750
125
125
63
63
63
63
63
63
63
32
32
32
32
32
32
32
2.290
1.330
0.908
0.665
0.360
0.318
0.209
0.0703
0.058
0.043
0.033
0.027
0.022
0.016
0.010
0.0084
0.003
0.010
0.018
0.064
0.100
0.256
0.324
0.075
0.144
0.225
0.400
0.576
1.024
1.936
4.900
6.400
0.78
0.60
0.52
0.45
0.41
0.40
0.39
0.27
0.17
0.14
0.15
0.16
0.16
0.09
0.11
0.067
0.195
0.225
0.260
0.335
0.415
0.496
0.579
0.474
0.345
0.363
0.462
0.560
0.618
0.484
0.760
0.539
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
50 A @ 125 V AC/DC
1A
1.25A
1.5A
1.75A
2A
001.
1.25
01.5
1.75
002.
02.5
003.
03.5
004.
005.
007.
008.
50 A @ 63 V AC/DC
2.5A
3A
3.5A
4A
50 A @ 32 V AC/35 V DC
5A
7A
8A
Notes:
1. AC Interrupting Rating tested at rated voltage with unity power factor. DC Interrupting
Devices designed to carry rated current for 4 hours minimum. It is recommended that
devices be operated continuously at no more than 80% rated current. See “Temperature
Rerating Curve”for additional rerating information.
Rating tested at rated voltage with time constant < 0.8 msec.
2. Nominal Resistance measured with < 10% rated current.
3. Nominal Melting I²t measured at 1 msecs. opening time.
Devices designed to be mounted with marking code facing up.
4. Nominal Voltage Drop measured at rated current after temperature has stabilized.
© 2009 Littelfuse, Inc.
437 Series
17
Revised: June 23, 2011
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/437.html for current information.
Surface Mount Fuses
Ceramic Fuse > 437 Series
Temperature Rerating Curve
AverageTime Current Curves
100
10
140
120
100
80
1
60
40
-65 -45
-25
-5
15
35
55
75
95
115 135 155
0.1
TEMPERATURE (°C)
Note:
0.01
0.001
1. Rerating depicted in this curve is in addition to the standard rerating of 20% for
continuous operation.
Example:ꢀ
For continuous operation at 75 degrees celsius, the fuse should be rerated as follows:
I = (0.80)(0.85)IRAT = (0.68)IRAT
0.1
1
10
100
CURRENT IN AMPERES
Soldering Parameters
tP
rꢂflow coꢅdꢄtꢄoꢅ
-Tꢂꢀꢁꢂꢃatꢈꢃꢂ mꢄꢅ (Ts(ꢀꢄꢅ)
Pbꢀ–ꢀfreeꢀassembly
TP
Critical Zone
Ramp-up
TL to TP
)
150°C
TL
TS(max)
pꢃꢂ Hꢂat -Tꢂꢀꢁꢂꢃatꢈꢃꢂ max (Ts(ꢀax)
)
200°C
tL
-Tꢄꢀꢂ (mꢄꢅ to max) (ts)
60ꢀ–ꢀ180ꢀseconds
Ramp-down
Avꢂꢃaꢆꢂ raꢀꢁ-ꢈꢁ ratꢂ (lꢄqꢈꢄdꢈsTꢂꢀꢁ
(Tl) to ꢁꢂak)
Preheat
3°C/second max.
TS(min)
tS
TS(ꢀax) toTl - raꢀꢁ-ꢈꢁ ratꢂ
5°C/second max.
217°C
-Tꢂꢀꢁꢂꢃatꢈꢃꢂ (Tl) (lꢄqꢈꢄdꢈs)
rꢂflow
25
time to peak temperature
(t 25ºC to peak)
-Tꢂꢀꢁꢂꢃatꢈꢃꢂ (tl)
60ꢀ–ꢀ150ꢀseconds
260+0/-5 °C
Time
pꢂakTꢂꢀꢁꢂꢃatꢈꢃꢂ (Tp)
Tꢄꢀꢂ wꢄthꢄꢅ 5°c of aꢉtꢈaꢇ ꢁꢂak
Tꢂꢀꢁꢂꢃatꢈꢃꢂ (tꢁ)
10ꢀ–ꢀ30ꢀseconds
raꢀꢁ-dowꢅ ratꢂ
6°C/second max.
8 minutes max.
260°C
Tꢄꢀꢂ 25°c to ꢁꢂakTꢂꢀꢁꢂꢃatꢈꢃꢂ (Tp)
Do ꢅot ꢂxꢉꢂꢂd
Wavꢂ Soꢇdꢂꢃꢄꢅꢆ
260°C, 10 seconds max.
© 2009 Littelfuse, Inc.
437 Series
18
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/437.html for current information.
Surface Mount Fuses
Ceramic Fuse > 437 Series
Product Characteristics
Moisture Resistance
MIL-STD-202, Method 106G
Body: Advanced Ceramic
Terminations: Ag / Ni / Sn (100% Lead-free)
Element Cover Coating: Lead-free Glass
Materials
MIL-STD-202, Method 107G,
ConditionꢀB
Thermal Shock
MIL-STD-202,ꢀMethodꢀ213B,ꢀ
Mechanical Shock
Vibration
Moisture
Sensitivity Level
Condition A
IPC/JEDECꢀJ-STD-020C,ꢀLevelꢀ1
MIL-STD-202, Method 201A
Solderability
HumidityTest
IPC/EIC/JEDECꢀJ-STD-002B,ꢀConditionꢀB
MIL-STD-202,ꢀMethodꢀ103B,ꢀConditionsꢀD
Vibration,
High Frequency
MIL-STD-202, Method 204D,
Condition D
Dissolution of
Metallization
IPC/EIC/JEDECꢀJ-STD-002B,ꢀ
Condition D
Resistance to
Solder Heat
MIL-STD-202,ꢀMethodꢀ210F,ꢀConditionꢀB
Terminal Strength
IECꢀ60127-4
Dimensions
Part Marking System
Aꢀꢁ codꢂ maꢃkꢄꢅꢆ codꢂ
3.200 0.ꢁ11ꢀ
[0.ꢁ26 0.0018
ꢁ.000
[0.0398
.250
.375
.500
.750
001.
1.25
01.5
1.75
002.
02.5
003.
03.5
004.
005.
007.
008.
D
E
F
ꢁ.63 +0.ꢁ0 / -0.2
[0.064 +0.004 / -0.00ꢀ8
ꢅ
H
J
N
ꢄ
L
N
ꢀ
P
0.ꢀꢁ19 +0.046 / -0.016
[0.0332 +0.00ꢁꢀ / -0.0038
2
R
S
T
W
X
0.520 0.200
[0.020 0.0ꢀ8
ꢁ.000
[0.0398
Part Numbering System
ꢁ.500
[0.0598
0437 008. W R
ꢁ.ꢀ00
[0.01ꢁ8
SERIES
PACꢄINꢅ CꢀDE
Rꢀ=ꢀReelꢀPack
AMP CꢀDE
3.500
[0.ꢁ3ꢀ8
ꢁꢂANTITꢃ CꢀDE
W = 3000 pcs
Packaging
Qꢈaꢅtꢄtꢊ &
paꢉkaꢆꢄꢅꢆ codꢂ
paꢉkaꢆꢄꢅꢆ Oꢁtꢄoꢅ
paꢉkaꢆꢄꢅꢆ Sꢁꢂꢉꢄfiꢉatꢄoꢅ
Qꢈaꢅtꢄtꢊ
8mmTape and Reel
EIA-481,ꢀIECꢀ60286,ꢀPartꢀ3
3000
WR
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/437.html for current information.
437 Series
19
相关型号：
©2020 ICPDF网 联系我们和版权申明