305 LITTELFUSE | Alldatasheet

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Technical content

Features

Applications

% of Ampere Rating Opening Time 110% 4 Hours, Minimum 300% 10 Seconds, Maximum 1000% 0.002 Seconds, Maximum

  • High Interrupting Rating of 1500A
  • Well suited for 277V application
  • Current rating options from 0.050 to 0.750A
  • Designed for operation in a range of hazardous environments
  • Sealed Electrical Specifications by Items 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. Ampere Rating (A) Interrupting Rating Amp Code Nominal Cold Resistance (Ohms) Nominal Melting I2t (A2 Sec.) Agency Approvals ATEX IECEx 0.050 1500A @ 277VAC/DC .050 12.00 0.00019 x x x 0.080 .080 8.19 0.00035 x x x 0.100 .100 5.00 0.00070 x x x 0.160 .160 3.00 0.00202 x x x 0.200 .200 2.68 0.00288 x x x 0.250 .250 1.6 0.00662 x x x 0.500 .500 0.46 0.04462 x x x 0.750 .750 0.27 0.13448 x x x 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.
  • Testing, measuring or processing electronic and electrical equipment
  • Motor controllers
  • Communication handsets
  • Process control and automations
  • Sensors
  • Lighting
  • Flowmeters Reference Standards Agency Standards ATEX EN 60079-0, EN 60079-11, EN 60079-26 IECEx IEC 60079-0, IEC 60079-11, IEC 60079-26 UL UL 913, UL 60079-0, UL 60079-11 cUL CAN/CSA C22.2 No. 157, CAN/CSA C22.2 No. 60079-0, CAN/CSA C22.2 No. 60079-11

© 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 Dimensions 15.60±0.50 0.64 9.00±0.50 5.00+1.00 - 0.50 12.70±0.20 Average Time Current Curves305 Series 100 0.1 0.01 0.001 0.0001 1 10 10000.01 TIME IN SECONDS CURRENT IN AMPERES 100 0.1 .100A .080A .050A .250A .200A .160A .750A .500A 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 twice rated DC voltage) Soldering Parameters Part Numbering System 0305 .050 M SERIES AMP CODE QuANTITY & PACkAgINg CODE Refer to Amp Code column in the Electrical Specifications table. M = Bulk pack, 1000 pcs H = Bulk pack, 100 pcs V = Bulk pack, 5 pcs Wave Soldering 260°C, 10 seconds max. Operating Temperature Current Rating Ambient Temperature ≤ 0.200 A - 40 ºC to +50 ºC

0.250 A - 40 ºC to +46 ºC

0.500 A - 40 ºC to +74 ºC

0.750 A - 40 ºC to +46 ºC

Note: 1) Any use of the 305 Series fuse outside of the ambient temperature ranges specified in the table is subject to additional investigation. Note: 1) Rerating depicted in this curve is in addition to the standard rerating of 25% for continuous operation. T emperature Rerating Curve