Fuse Datasheet
304 Series
PICO® 277V Intrinsically Safe Fuse
RoHS
Description
The PICO® 304 Series offers a range of suface mountable
encapsulated fuses certified as intrinsically safe components that
can be used in hazardous locations. Ideal for use in oil, gas, mine,
chemical, pharmaceutical and process industries, the PICO® 304
Series surface mountable fuse was designed to limit the energy
and temperature generated during its operation. The fuse design
and its encapsulant are suitable for use in intrinsically safe
apparatus and associated apparatus for peak voltage not exceeding
375V.
Features
■ Surface Mountable
■ Global hazardous location
certifications
■ Encapsulated and sealed
(1mm minimum)
■ Suitable for Class I, Class II,
Class III, and Zone 0 Hazardous
Location.
■ High breaking capacity of
1500A at 277V AC/DC
Agency Approvals
■ RoHS-compliant
■ Current rating options from
0.050 to 0.750A
Agency
Agency File Number
Ampere Rating
DEMKO 13 ATEX 1200U
II 1 G Ex ia IIC
50 - 750mA
Applications
■ Testing, measuring or
processing electronic and
electrical equipment
■ Process control and automation
■ Sensors
E358130
50 - 750mA
50 - 750mA
50 - 750mA
IECEx UL 13.0077U Ex ia IIC
NA
■ Lighting
■ Motor controllers
■ Flow/gas meters
■ Communication handsets/two-
way radios
Reference Standards
Electrical Characteristics for Series
Agency
Standards
% of Ampere Rating
110%
OpeningTime
ATEX
EN 60079-0, EN 60079-11, EN 60079-26
IEC 60079-0, IEC 60079-11, IEC 60079-26
4 Hours, Minimum
10 Seconds, Maximum
IECEx
UL 913, UL 60079-0, UL 60079-11,
UL 248-1, UL 248-14
300%
United States
CAN/CSA C22.2 No. 157, CAN/CSA C22.2
No. 60079-0,CAN/CSA C22.2 No. 60079-11,
CSA 248-1, CSA 248-14
Canada
Electrical Specifications by Items
Agency Approvals
Ampere
Rating
(A)
Nominal
Melting
I2t (A2 Sec.)
Minimum Cold Minimum Cold
Nominal Cold
Resistance at
25°C (Ohms)
Catalog
Number
Amp
Code
Interrupting
Rating
Resistance at
-20°C (Ohms)
Resistance at
-40°C (Ohms)
0304.050
0304.080
0304.100
0304.160
0304.200
0304.250
0304.500
0304.750
0.050
0.080
0.100
0.160
0.200
0.250
0.500
0.750
.050
.080
.100
.160
.200
.250
.500
.750
0.00019
0.00035
0.00070
0.00202
0.00288
0.00662
0.04462
0.13448
9.202
6.031
2.709
2.297
1.935
1.268
0.392
0.219
9.010
5.963
2.668
2.292
1.839
1.105
0.368
0.196
12.00
8.19
5.00
3.00
2.68
1.60
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1500A @
277VAC/DC
0.46
0.27
Notes: 1. The fuse must be mounted so that creepage and clearance distances are not 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 = 88°C, 250mA = 52°C, 500mA = 52°C, and 750mA = 45°C.
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
1
Revised: GD. 10/14/21
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