Special Application Fuses
PICO
®
305 Series Fuses - 277V UL913 Intrinsically Safe Fuse
PICO
®
305 Series - 277V UL913 Intrinsically Safe Fuse
Description
The PICO 305-Series fuse offer a range of encapsulated fuses
approved under UL 913 standard for Intrinsically Safe Electrical
Equipment to operate in hazardous locations. Ideal for use in
oil, gas, mine, chemical, and pharmaceutical industries, the
PICO 305-Series fuse was designed to limit the energy and
temperature generated during its operation. The fuse design
and its encapsulant are suitable for use in an intrinsically safe
apparatus and associated apparatus for voltage not exceeding
277V.
Features
Agency Approvals
Agency
Agency File Number
• High Interrupting Rating of • Designed for operation
in a range of hazardous
1500A
environments
• Well suited for 277V
application
• Current rating options
from 0.050 to 0.750A
Applications
• Testing, measuring or
• Process control and
processing electronic and
automations
electrical equipment
• Sensors
• Motor controllers
• Lighting
• Communication handsets • Flowmeters
Electrical Characteristics for Series
% of Ampere
Rating
110%
300%
1000%
Opening Time
4 Hours, Minimum
10 Seconds, Maximum
0.002 Seconds, Maximum
• Sealed
ATEX
DEMKO 13 ATEX 1200U
E358130
IECEx
IECEx UL 13.0077U
Reference Standards
Agency
Standards
ATEX
IECEx
UL
cUL
EN 60079-0, EN 60079-11,
EN 60079-26
IEC 60079-0, IEC 60079-11,
IEC 60079-26
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
Electrical Specifications by Items
Ampere
Rating
(A)
0.050
0.080
0.100
0.160
0.200
0.250
0.500
0.750
1500A @ 277VAC/DC
Nominal
Cold Resistance
(Ohms)
12.00
8.19
5.00
3.00
2.68
1.6
0.46
0.27
Nominal
Melting
I
2
t (A
2
Sec.)
0.00019
0.00035
0.00070
0.00202
0.00288
0.00662
0.04462
0.13448
Agency Approvals
ATEX
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
IECEx
x
x
x
x
x
x
x
x
Interrupting Rating
Amp Code
.050
.080
.100
.160
.200
.250
.500
.750
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 375V peak.
3) Maximum surface temperature rise at 170% rated current 200mA=80°C, 250mA = 84°C, 500mA = 56°C, and 750mA = 84°C.
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/14
Special Application Fuses
PICO
®
305 Series Fuses - 277V UL913 Intrinsically Safe Fuse
Product Characteristics
Operating Temperature
Current Rating
≤ 0.200 A
0.250 A
0.500 A
0.750 A
Note:
1) Any use of the 305 Series fuse outside of the ambient temperature ranges specified in
the table is subject to additional investigation.
305 Series
Average Time Current Curves
.050A
.080A
.100A
.160A
.200A
.250A
.500A
.750A
Ambient Temperature
- 40 ºC to +50 ºC
- 40 ºC to +46 ºC
- 40 ºC to +74 ºC
- 40 ºC to +46 ºC
100
10
1
Thermal Shock
Vibration
Insulation Resistance
(After Opening)
Withstands 5 cycles of –55°C to
125°C
Per MIL-STD-202F
Greater than 10,000 ohms
(at twice rated DC voltage)
TIME IN SECONDS
0.1
0.01
Soldering Parameters
Wave Soldering
260°C, 10 seconds max.
0.001
0.0001
0.01
0.1
1
CURRENT IN AMPERES
10
100
1000
Dimensions
15.60±0.50
9.00±0.50
Temperature Rerating Curve
+1.00
5.00- 0.50
0.64
12.70±0.20
Part Numbering System
0305 .050
M
SERIES
AMP CODE
Refer to Amp Code column in the
Electrical Specifications table.
Note:
1) Rerating depicted in this curve is in addition to the standard rerating of 25% for
continuous operation.
QuANTITY & PACkAgINg CODE
M = Bulk pack, 1000 pcs
H = Bulk pack, 100 pcs
V = Bulk pack, 5 pcs
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/14
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