Special Application Fuses
242 Series Barrier Network Fuse
Barrier Network Fuse 242 Series
Description
The 242 Series hazardous area barrier network fuse
offers a range of fuses designed to enable greater safety
operating electronic equipment within potentially explosive
environments.
Features
1500A minimum.
Standards (EN50020)
for hazardous
applications.
Agency Approvals
Agency
Agency File Number
Ampere Range
lead and surface
mount.
rating. Meets the
Applications
Recognized under the
components program
of Underwriters Laboratories
(JDYX2-10480)
0.050 - 0.250 A
Electrical Characteristics
% of Ampere
Rating
110%
300%
1000%
Opening Time
4 hours, Minimum
10 seconds, Maximum
0.002 seconds, Maximum
electrical equipment;
Electrical connections
and components, Test
equipment
Electrical Characteristics
Ampere
Rating
(A)
0.050
0.080
0.100
0.160
0.200
0.250
Body
Color
Coding
Red
Green
Blue
Violet
Brown
Black
4000A @
250VAC/VDC
Nominal
Nominal
Cold
Melting
Resistance
2
I t (A
2
Sec.)
(Ohms)
11.34
8.19
3.60
3.00
2.68
1.6
0.000103
0.000214
0.000977
0.00157
0.0038
0.00579
Agency
Approvals
Amp
Code
.050
.080
.100
.160
.200
.250
Interrupting
Rating
x
x
x
x
x
x
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/242.html for current information.
341
Revised: January 7, 2009
Barrier Network Fuse 242 Series
242 Series
Introduction to Application Fuses
Special Circuit Protection
242 Series Barrier Transientology
Network Fuse
Average Time Current Curves
.050 A
.080 A
.100 A
.125 A
.160 A
.200 A
.250 A
Dimensions
100
4.60
mm
(.181")
3.02
mm
(.119")
1.90
mm
(.075")
10
8.40
mm
(.331")
.635
mm
(.025")
TIME IN SECONDS
1
4.60
mm
(.181")
3.02
mm
(.119")
1.90
mm
(.075")
0.1
8.40
mm
(.331")
9.80mm
2.90mm
0.01
3.20mm
0.001
0.1
1
100
10
CURRENT IN AMPERES
1000
Soldering Parameters
Reflow Condition
- Temperature Min (T
s(min)
)
Pre Heat
- Temperature Max (T
s(max)
)
- Time (min to max) (t
s
)
Average ramp up rate (Liquidus Temp
(T
L
) to peak
T
S(max)
to T
L
- Ramp-up Rate
Reflow
- Temperature (T
L
) (Liquidus)
- Temperature (t
L
)
Pb – Free assembly
150°C
200°C
60 – 180 secs
5°C/second max
5°C/second max
217°C
60 – 150 seconds
250
+0/-5
T
P
Ramp-up
t
P
Critical Zone
T
L
to T
P
T
L
Temperature
T
S(max)
Preheat
t
L
Ramp-down
T
S(min)
t
S
25
time to peak temperature
(t 25ºC to peak)
Peak Temperature (T
P
)
Time within
5°C
of actual peak Temp. (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
°C
Time
20 – 40 seconds
5°C/second max
8 minutes Max.
260°C
Wave Soldering
260°C, 10 seconds max.
Product Characteristics
Operating Temperature
Thermal Shock
Vibration
Insulation Resistance
(After Opening)
–40
O
C to 125
O
C.
Withstands 5 cycles of – 55
O
C to
125
O
C
Per MIL-STD-202F
Greater than 10,000 ohms.
Part Numbering System
SERIES
AMP CODE
0242.050UAT1
Refer to Amp Code column in the
Electrical Specifications table.
QUANTITY & PACKAGING CODE
HAT1 = 100 pcs, Axial Leaded, Ammo Pack T1 Tape
UAT1 = 500 pcs, Axial Leaded, Ammo Pack T1 Tape
UR = 500 pcs, Surface Mount, Tape & Reel
Barrier Network Fuse 242 Series
342
Revised: January 7, 2009
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/242.html for current information.
Special Application Fuses
259 Series Safe-T-Plus Fuse
Safe-T-Plus Fuse 259 Series
Description
The Safe-T-Plus 259 Series offers a range of encapsulated
fuses designed to enable greater safety operating electronic
equipment within potentially explosive environments. Originally
designed to serve the needs of gas plants, petrochemical and
processing industries, these fuses are certitifed for use within
intrinsically safe apparatus (CENELEC EN50014 to 039 and IEC
60079-11).
The encapsulation material is Polyamide 6 at a minimum depth
of 1mm (3mm typically) and has a CTI (Comparative Tracking
Index) of greater than 175. The leads are separated by a
minimum clearance and creepage distance of 9 mm and hence
are suitable for use in intrisically safe appartatus for voltage not
exceeding 125V rms (190V peak).
Agency Approvals
Agency
Agency File Number
Ampere Range
Features
use within intrinsically
safe apparatus for
applications such as gas
plants, petrochemical
and processing
industries
Baseefa
Baseef02ATEX0071U
.062A - 1.0A
Electrical Characteristics
% of Ampere
Rating
100%
200%
Opening Time
4 hours, Minimum
5 seconds, Maximum
within environments
where there is danger
of gas explosion from
faulty circuits
Applications
processing electronic
and electrical equipment
Electrical Characteristics
Ampere
Rating
(A)
0.062
0.125
0.250
0.375
0.500
0.750
1.00
3.15
5
Amp
Code
.062
.125
.250
.375
.500
.750
001
003
005
300A @ 125 VDC
50A @ 125 VAC
Interrupting
Rating
Nominal
Cold
Resistance
(Ohms)
8.1
2.4
0.87
0.46
0.32
0.19
0.14
0.0295
0.0158
Nominal
Melting
I
2
t (A
2
Sec.)
0.00016
0.0012
0.0095
0.025
0.0598
0.153
0.256
1.27
4.14
Nom
Voltage
Drop
(mV)
2.10
1.30
0.83
0.81
0.78
0.23
0.24
0.131
0.110
Agency
Approvals
Baseefa
x
x
x
x
x
x
x
Schedule of limitations.
1) The fuse must be so mounted that creepage and clearance distances aren’t impaired in any way.
2) When used in intrinsically safe apparatus it will be necessary to determine a surface temperature classification for the fuse.
3) Max surface temp rise at 170% rated current £750mA=40ºC, 1A=45ºC, 3A=63ºC and 5A=114ºC.
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/259.html for current information.
343
Revised: February 2, 2009
Safe-T-Plus Fuse 259 Series
259 Series
Introduction to Application Fuses
Special Circuit Protection
Transientology
259 Series Safe-T-Plus Fuse
Product Characteristics
Operating Temperature
Thermal Shock
Vibration
Insulation Resistance
(After Opening)
– 55
O
C to 90
O
C.
Withstands 5 cycles of – 55
O
C to
125
O
C
Per MIL-STD-202F
Greater than 10,000 ohms.
Average Time Current Curves
.062 A
.25 A
.375 A
.50 A
.75 A
1A
.125 A
3.15 A
100
10
Soldering Parameters
TIME IN SECONDS
1
Wave Soldering
260°C, 10 seconds max.
0.1
Dimensions
0.01
(.512")
13
mm
(.315")
8
mm
(.197")
5
mm
(.394")
10
mm
0.001
0.1
1
100
10
CURRENT IN AMPERES
1000
(.025")
.635
mm
Part Numbering System
0259.062M
SERIES
AMP Code
The dot is poisitioned before
the Packaging Suffix with whole
ratings and within the numbering
sequence for fractional ratings.
Refer to Amp Code column in the
Electrical Specifications table.
Example:
1 amp product is
0259001.M
(.062 amp product shown).
PACKAGING Code
M = Bulk pack, 1000 pcs
T = Bulk pack, 200 pcs
5A
Safe-T-Plus Fuse 259 Series
344
Revised: February 2, 2009
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/259.html for current information.
PCB设计
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
