343
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Special Application Fuses
Barrier Network Fuse 242 Series
242 Series Barrier Network Fuse
Please refer to www.littelfuse.com/series/242.html for current information.
242 Series
Barrier Network Fuse 242 Series
Description
Agency Approvals
Agency Agency File Number Ampere Range
Recognized under the
components program
of Underwriters Laboratories
(JDYX2-10480)
0.050 - 0.250 A
Electrical Characteristics
Features
Applications
% of Ampere
Rating Opening Time
100% 4 hours, Minimum
300% 10 seconds, Maximum
1000% 0.002 seconds, Maximum
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for hazardous
applications.
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rating. Meets the
1500A minimum.
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lead and surface
mount.
Electrical Characteristics
Ampere
Rating
(A)
Amp
Code
Body
Color
Coding
Interrupting
Rating
Nominal
Cold
Resistance
(Ohms)
Nominal
Melting
I2t (A2 Sec.)
Agency
Approvals
0.050 .050 Red
4000A @
250VAC/VDC
11.34 0.000103 x
0.080 .080 Green 8.19 0.000214 x
0.100 .100 Õi 3.60 0.000977 x
0.160 .160 Violet 3.00 0.00157 x
0.200 .200 ÀÜ 2.68 0.0038 x
0.250 .250 >V 1.6 0.00579 x
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offers a range of fuses designed to enable greater safety
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electrical equipment;
Electrical connections
and components, Test
equipment
Revised: September 20, 2011
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
344 © 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Special Application Fuses
Barrier Network Fuse 242 Series
242 Series Barrier Network Fuse
Please refer to www.littelfuse.com/series/242.html for current information.
Average Time Current Curves
0.1
0.01
0.001
0.0001
1
10
100
TIME IN SECONDS
.050A
.080A
.100A
.200A
.125A
.160A
.250A
0.01 0.1 1 10 100 1000
CURRENT IN AMPERES
Reflow Condition Pb – Free assembly
Pre Heat
- Temperature Min (Ts(min))150°C
- Temperature Max (Ts(max))200°C
- Time (min to max) (ts)60 – 180 secs
Average ramp up rate (Liquidus Temp
(TL) to peak 5°C/second max
TS(max) to TL - Ramp-up Rate 5°C/second max
Reflow - Temperature (TL) (Liquidus) 217°C
- Temperature (tL)60 – 150 seconds
Peak Temperature (TP)250+0/-5 °C
Time within 5°C of actual peak Temp. (tp)20 – 40 seconds
Ramp-down Rate 5°C/second max
Time 25°C to peak Temperature (TP)8 minutes Max.
Do not exceed 260°C
Soldering Parameters
Product Characteristics
Dimensions
3.02mm
(.119")
8.40mm
(.331")
4.60mm
(.181")
1.90mm
(.075")
3.02mm
(.119")
8.40mm
(.331")
4.60mm
(.181")
2.90mm
3.20mm
9.80mm
1.90mm
(.075")
.635mm
(.025")
Operating Temperature –40OC to 125OC.
Thermal Shock Withstands 5 cycles of – 55OC to
125OC
Vibration Per MIL-STD-202F
Insulation Resistance
(After Opening) Greater than 10,000 ohms.
Part Numbering System
0242.050UAT1
SERIES
AMP CODE
QUANTITY & PACKAGING CODE
Refer to Amp Code column in the
Electrical Specifications table.
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Wave Soldering 260°C, 10 seconds max.
Time
Temperature
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
(t 25ºC to peak)
Ramp-down
Ramp-up
Preheat
Critical Zone
TL to TP