0308.750.pdf 데이터시트 (총 3 페이지) - 파일 다운로드 0308.750 데이타시트 다운로드

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Special Application Fuses
Intrinsically Safe > Surface Mount > 308 Series
308 Series 30V Intrinsically Safe Fuse
Pb RoHS
Agency Approvals
Agency
Agency File Number
DEMKO 15 ATEX 1439U
II 1 G Ex ia IIC
E358130
IECEx UL 15.0011U
Ex ia IIC
Ampere Rating
0.250A – 1.5A
0.250A – 1.5A
0.250A – 1.5A
Reference Standards
Certification
ATEX
IECEx
UL
cUL
Standards
EN 60079-0, EN 60079-11
IEC 60079-0, IEC 60079-11
UL 913, UL 60079-0,
UL 60079-11
CAN/CSA C22.2 No. 157,
CAN/CSA C22.2 No. 60079-0,
CAN/CSA C22.2 No. 60079-11
Description
The 308 Series offers a range of surface mountable
encapsulated fuses certified as intrinsically safe components
that can be used in hazardous locations. Ideal for use in oil,
gas, mine, chemical, pharmaceutical and process industries,
the 308 Series surface mountable fuse was designed to limit
the energy and temperature generated during its operation.
The fuse design and its encapsulant are suitable for use in
intrinsically safe apparatus and associated apparatus for peak
voltage not exceeding 30V.
Features
• Surface Mountable
• Encapsulated and sealed
(0.7mm minimum)
• Designed for operation in
a range of hazardous area
applications requiring
30V peak
• RoHS compliant
and Pb-Free
• Fully compatible with
lead-free solder alloys and
higher temperature profiles
associated with lead-free
assembly
• Global hazardous locaiton
(haz loc) certificaitons
Applications
• Testing, measuring or
processing electronic and
electrical equipment
• Motor controllers
• Communication handsets/
two-way radios
• Process control and
automation
• Sensors
• Lighting
• Flow/gas meters
Electrical Characteristics for Series
% of Ampere Rating
100%
250%*
350%**
* Applicable to 750mA - 1.5A
** Applicable to 250mA - 1.5A
Opening Time
4 Hours, Minimum
120 Seconds, Maximum
60 Seconds, Maximum
Electrical Specifications by Items
Catalog
Number
Ampere
Rating
(A)
Amp Code
Interrupting
Rating
Nominal
Melting
I2t (A2 Sec.)
Minimum Cold
Resistance at
-20°C (Ohms)
Minimum Cold
Resistance at
-40°C (Ohms)
0308.250
0308.375
0308.500
0308.750
0308001.
03081.25
030801.5
0.250
0.375
0.500
0.750
1.00
1.25
1.50
.250
.375
.500
.750
001.
1.25
01.5
50A@24VAC
50A@30VDC
0.004
0.010
0.022
0.048
0.100
0.220
0.3
1.856
1.022
0.712
0.520
0.226
0.240
0.182
1.821
1.006
0.676
0.511
0.216
0.236
0.144
Notes:
1. The fuse must be mounted so that creepage and clearance distances aren’t impaired in any way.
2. The fuse is suitable for use in intrinsically safe equipment and associated apparatus for voltage not exceeding 30V peak.
3. Maximum surface temperature rise at 170% rated current: 250-375mA = 23°C, 500mA = 35°C, 750mA = 53°C, 1A = 38°C, 1.25-1.50A = 96°C.
4. Minimum Cold Resistance at -30°C is available upon request.
Nominal Cold
Resistance at
25°C (Ohms)
2.290
1.330
0.908
0.665
0.420
0.318
0.209
Agency Approvals
X XX
X XX
X XX
X XX
X XX
X XX
X XX
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/04/19

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Special Application Fuses
Intrinsically Safe > Surface Mount > 308 Series
Temperature Rerating Curve
140
120
100
80
60
40
-85 -65 -45 -25 -5 15 35 55 75 95 115 135 155
TEMPERATURE (ºC)
Notes:
1. Re-rating depicted in this curve is in addition to the standard re-rating of 20% for continuous operation.
Example:
For continuous operation at 55°C, the fuse should be rerated as follows:
I = (0.80)(0.90)IRAT = (0.72)IRAT
2. The temperature rerating curve represents the nominal conditions. For questions about temperature
rerating curve, please consult Littelfuse technical support for assistance.
Average Time Current Curves
100.000
10.000
1.000
0.100
Soldering Parameters
Reflow Condition
- Temperature Min (Ts(min))
Pre Heat
- Temperature Max (Ts(max))
- Time (Min to Max) (ts)
Average ramp up rate (Liquidus Temp (TL) to peak
TS(max) to TL - Ramp-up Rate
Reflow
- Temperature (TL) (Liquidus)
- Temperature (tL)
Peak Temperature (TP)
Time within 5°C of actual peak Temperature (tp)
Ramp-down Rate
Time 25°C to peak Temperature (TP)
Do not exceed
Pb – Free assembly
150°C
200°C
60 – 180 secs
3°C/second max.
3°C/second max.
217°C
60 – 150 seconds
260+0/–5 °C
30 Sec Max
6°C/second max.
8 minutes max.
-
0.010
0.001
0.01
0.1 1
Current in Ampers
10
100
TP
TL
TS(max)
Ramp-up
TS(min)
25
Preheat
tS
time to peak temperature
(t 25ºC to peak)
tP
Critical Zone
TL to TP
tL
Ramp-down
Time
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/04/19

No Preview Available !

Special Application Fuses
Intrinsically Safe > Surface Mount > 308 Series
Dimensions (mm)
GATE
SEE MARKING CODE
5.40 +-00.1.042
3.80 +-00.1.145
Part Marking System
Amp Code
0.250
0.375
0.500
0.750
001.0
1.25
01.5
Marking Code
D
E
F
G
H
J
K
2
.
20
+0.50
-0.20
RECOMMENDED PCB LAND PATTERN
2.45
0. 20 MIN
2.34
2.04 [REF]
2.0
Part Numbering System
0308 001. U R
Series
Amp Code
Refer to Electrical
Specifications table
Quantity Code
U = 500 pcs
Packaging code
R = Tape and Reel
Packaging
Packaging Option
12mm Tape and Reel
Packaging
Specification
EIA 481-1
Quantity
500
Quantity and
Packaging Code
UR
Product Characteristics
Molding Material
Ambient Temperature 1 2
Terminations
Thermal Shock
Vibration
Mechanical Shock
Moisture Resistance
Salt Spray
Resistance to Soldering
Heat
Polyamide 6T/66
CTI 100 volts minimum
Continuous Operating Temperature: 140°C
-40°C to +70°C
Tin-Plated Silver-Plated Copper
Withstands 100 cycles of -55°C to 125°C
MIL-STD-202, Method 201
MIL-STD-202, Method 213, Condition A
MIL-STD-202, Method 106
MIL-STD-202, Method 101, Condition B
MIL-STD-202, Method 210, Condition K
Notes:
1. Any use of the 308 Series fuse outside of the ambient temperature range specified in the table is subject to
additional investigation.
2. Specified ambient temperature range is for intrinsic safety certification.
Disclaimer Notice - 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.
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/04/19