© 2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/06/16
Special Application Fuses
PICO® 259-UL913 Series Intrinsically Safe Fuse for Hazardous Locations
PICO® 259-UL913 Series Intrinsically Safe Fuse
Description
Agency Approvals
Agency Agency File Number Ampere Range
Baseefa02ATEX0071U 0.62A - 5A
E10480
E358130 0.62A - 5A
IECEx BAS 10.0098U 0.62A - 5A
Electrical Characteristics for Series
Features
Applications
% of Ampere
Rating Opening Time
100% 4 Hours, Minimum
200% 5 Seconds, Maximum
• Encapsulated and sealed
(1mm minimum)
•
0.62A - 5A range options
• Designed to operate
within hazardous
environments
• Global hazardous location
certifications
Electrical Specifications by Items
Schedule of limitations:
1) The fuse must be mounted in such a way 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.
The 259-UL913 Series offers a range of encapsulated fuses
certified under the UL 913, the standard for intrinsically safe
electrical equipment, to operate in hazardous locations. Ideal for
use in the oil, gas, mine, chemical process, 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 and associated apparatus for voltage
not exceeding 125V rms (190V peak).
• Testing, measuring or processing electronic and
electrical equipment
Additional Information
Datasheet Samples
Resources
RoHS
Reference Standards
Agency Standards
ATEX EN 60079-0, EN 60079-11
IECEx IEC 60079-0, IEC 60079-11
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)
Nominal Cold
Resistance at
25°C (Ohms)
Agency Approvals
0.062 .062
50A @ 125 VAC
300A @ 125 VDC
0.00011 4.89 4.39 7. 0 0 x x x
0.125 .125 0.0012 1.35 1.26 1.70 x x x
0.250 .250 0.0095 0.51 0.48 0.67 x x x
0.375 .375 0.025 0.32 0.29 0.395 x x x
0.500 .500 0.0598 0.24 0.22 0.302 x x x
0.750 .750 0.153 0.14 0.12 0.175 x x x
1. 0 0 0 01. 0.256 0.10 0.07 0.128 x x x
3.00 003. 1.27 0.03 0.01 0.03 x x x
5.00 005. 50A @ 125 VAC
300A @ 63 VDC 4.14 0.01 0.005 0.0158 x x x
Application testing is strongly recommended.
© 2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/06/16
Special Application Fuses
PICO® 259-UL913 Series Intrinsically Safe Fuse for Hazardous Locations
Product Characteristics
Dimensions
(.512")
13mm
(.394")
10mm
(.025")
.635mm
(.315")
8mm
(.197")
5mm
Average Time Current Curves
100
100
10
1
0.1
0.01
0.001
110 1000
0.1
TIME IN SECONDS
CURRENT IN AMPERES
1 A
.750 A
.500 A
3.15 A
5 A
.125 A
.062 A
.375 A
.250 A
259 Series
Part Numbering System
0259.062M X913
SERIES
AMP Code
PACKAGING 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.
M = Bulk pack, 1000 pcs
T = Bulk pack, 10 pcs
Example:
1 amp product is
0259001.MX913
(.062 amp product shown).
Operating Temperature
Current Rating Ambient Temperature
≤ 0.750 A - 40ºC to +81ºC
1 A - 40ºC to +73ºC
3 A - 40ºC to +74ºC
5 A - 40ºC to +45ºC
Notes:
1. Any use of the 259-UL913 Series fuse outside of the ambient temperature ranges
specified in the table is subject to additional investigation.
2. Specified ambient temperature range is for intrinsic safety certification.
Materials
Body : Polyamide
Terminals - Tin Plated Copper Alloy
Maximum operating temperature of
Materials is 130°C
Operating
Temperature
For operating temperature see table
above (Consider re-rating)
Thermal Shock Withstands 5 cycles of – 55°C to 125°C
Vibration Per MIL-STD-202, Method 201
Insulation Resistance
(After Opening)
Greater than 10,000 ohms
(at 250V DC)
Soldering Parameters
Recommended Hand Soldering Parameters:
Solder Iron Temperature: 350°C +/- 5°C
Heating Time: 5 seconds max.
Note: These devices are not recommended for IR or
Convection Reflow process
Recommended Process Parameters:
Wave Parameter Lead-Free Recommendation
Preheat:
(Depends on Flux Activation Temperature) (Typical Industry Recommendation)
Temperature Minimum: 100°C
Temperature Maximum: 150°C
Preheat Time: 60-180 seconds
Solder Pot Temperature: 260°C Maximum
Solder Dwell Time: 2-5 seconds
Note:
1. Re-rating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
Temperature Re-rating Curve
Packaging
Packaging
Option
Packaging
Specification Quantity Quantity & Packaging
Code
Bulk N/A 1000 M = Bulk 1000 pieces,
T = Bulk 10 pieces
Please refer to available
quantities above in “Part
Numbering System”
Bulk N/A 10
