Littelfuse PICO 259-UL913 User Manual
Special Application Fuses
PICO® 259-UL913 Series Intrinsically Safe Fuse for Hazardous Locations
PICO® 259-UL913 Series Intrinsically Safe Fuse
Agency Approvals
Agency Agency File Number
Baseefa
(UL 913)
Baseef02ATEX0071U
IECEx BAS 10.0098U
E10480
E358130
Baseefa
Description
The 259-UL913 Series offers a range of encapsulated fuses
approved under the UL 913 standard for Intrinsically Safe
Electrical Equipment to operate in hazardous locations. Ideal
for use in the oil, gas, mine, chemical, and pharmaceutical
industries, the 259-UL913 fuse was designed to limit the energy
and temperature generated during its operation. In addition
to UL913, these fuses meet ATEx and IECEx requirements.
The fuse design and its encapsulant are suitable for use in
intrinsically safe appartatus for voltage not exceeding 125V rms
(190V peak).
Features
• Hermetically sealed
62mA - 5A range options
•
• Designed to operate
within hazardous
environments
• Meet certification for use
within intrinsically safe
apparatus for applications
such as gas plants,
petrochemical, mine, and
processing industries
Electrical Characteristics for Series
% of Ampere
Rating
100% 4 Hours, Minimum
200% 5 Seconds, Maximum
Opening Time
Applications
• Testing, measuring or processing electronic and
electrical equipment
Electrical Specifications by Items
Ampere
Rating
(A)
0.062
0.125 1.70 0.0012 1.30 x x x
0.250 0.67 0.0095 0.83 x x x
0.375 0.395 0.025 0.81 x x x
0.500 0.302 0.0598 0.78 x x x
0.750 0.175 0.153 0.23 x x x
1. 0 0 0.128 0.256 0.24 x x x
3.00 0.275 1.27 0.131 x x x
5.00
Schedule of limitations:
1) The fuse must be so mounted that creepage and clearance distances aren’t impaired in any way.
2) The fuse is suitable for use in intrinsically safe equipment for voltages not exceeding 190V peak.
3) Maximum surface temperature rise at 170% rated current ≤750mA=40ºC, 1A=55ºC, 3A=118ºC and 5A=135ºC.
Interrupting Rating
50A @ 125 VAC
300A @ 125 VDC
50A @ 125 VAC
300A @ 63 VDC
Nominal
Cold Resistance
(Ohms)
7. 0 0 0.00016 2.10 x x x
0.0158 4.14 0.110 x x x
Nominal
Melting
I2t (A2 Sec.)
Nom
Voltage
Drop
(mV)
Baseefa
Agency Approvals
UL 913
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/08/13
Special Application Fuses
(.512")
10
.635
(.197")
259 Series
PICO® 259-UL913 Series Intrinsically Safe Fuse for Hazardous Locations
Product Characteristics
Operating Temperature
Current Rating Max Ambient Temp
≤ 0.750 A 81 ºC
1 A 73 ºC
3 A 74 ºC
5 A 45 ºC
Thermal Shock
Withstands 5 cycles of –55°C to
125°C
Vibration Per MIL-STD-202F
Insulation Resistance
(After Opening)
Greater than 10,000 ohms
(at 250V DC)
Soldering Parameters
Wave Soldering 260°C, 10 seconds max.
Dimensions
Average Time Current Curves
3.15 A
1 A
.750 A
.062 A
100
10
1
TIME IN SECONDS
0.1
0.01
0.001
0.1
.500 A
.375 A
.250 A
.125 A
1
CURRENT IN AMPERES
5 A
10
100
1000
(.025")
mm
(.394")
13mm
mm
(.315")
8
mm
5mm
Part Numbering System
0259.062M X913
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.
PACKAGING Code
M = Bulk pack, 1000 pcs
T = Bulk pack, 10 pcs
Example:
1 amp product is
0259001. MX913
(.062 amp product shown).
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Revised: 02/08/13
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