259 LITTELFUSE | Alldatasheet

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Technical content

Features

Applications

% of Ampere Rating Opening Time 100% 4 Hours, Minimum 200% 5 Seconds, Maximum

  • Encapsulated and sealed (1mm minimum)
  • 0.062A - 5A range options
  • Designed to operate within environments where there is danger of gas explosion from faulty circuits
  • ATEX and IECEx certified components
  • RoHS compliant Electrical Specifications by Items 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. 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 5.00 005. 50A @ 125 VAC 300A @ 63 VDC 4.14 0.01 0.005 0.0158 x x x The Safe-T -Plus 259 Series offers a range of encapsulated fuses designed to enable greater safety for operating electronic equipment within potentially explosive environments. Originally designed to serve the needs of gas plants, petrochemical and processing industries, these fuses are certitifed for use within intrinsically safe apparatus with ATEX and IECEx certifications. 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 SamplesResources Application testing is strongly recommended.

© 2016 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/04/16 Special Application Fuses PICO® 259 Series Safe-T-Plus Fuse for Hazardous Locations Product Characteristics Dimensions (.512") 13mm (.394") 10mm (.025") .635mm (.315") 8mm (.197") 5mm Average Time Current Curves 100 100 0.1 0.01 0.001 1 10 10000.1 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

Body : Polyamide Terminals - Tin Plated Copper Alloy Max. operating temperature of materials 130°C Operating Temperature Operating temperature depends on fuse rating and max. allowed fuse surface temperature. (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 Soldering Parameters Part Numbering System 0259.062M 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 Speci- fications table. M = Bulk pack, 1000 pcs T = Bulk pack, 10 pcs Example: 1 amp product is 0259001.M (.062 amp product shown). 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. T emperature 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