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Technical content

Features

Applications

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

  • Hermetically sealed
  • 62mA - 5A range options
  • Designed to operate within environments where there is danger of gas explosion from faulty circuits
  • Meet certification for use within intrinsically safe apparatus for applications such as gas plants, petrochemical and processing industries 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 Cold Resistance (Ohms) Nominal melting I2t (A2 Sec.) Nom Voltage Drop (mV) Agency Approvals baseefa 0.062 .062 50A @ 125 VAC 300A @ 125 VDC 7. 0 0 0.00016 2.10 x x 5.00 .005 50A @ 125 VAC 300A @ 63 VDC 0.0158 4.14 0.110 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 ATEx (EN 60079-0:2009 & EN 60079- 11:2007), IECEx) IEC 60079-0:2007 & IEC 60079-11:2006). The fuse design and its encapsulant are suitable for use in intrinsically safe appartatus for voltage not exceeding 125V rms (190V peak).
  • Testing, measuring or processing electronic and electrical equipment Additional Information Datasheet SamplesResources

© 2013 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/19/13 Special Application Fuses

259 Series Safe-T-Plus Fuse

(.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

Operating Temperature – 55°C to 90°C 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 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). Wave Soldering 260°C, 10 seconds max.