Special Application Fuses PICO® 259 Series Safe-T-Plus Fuse for Hazardous Locations PICO® 259 Series Safe-T-Plus Fuse RoHS Description 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). Agency Approvals Agency Features Agency File Number Ampere Range Baseefa02ATEX0071U 0.062A - 5A IECEx BAS 10.0098U 0.062A - 5A E10480 0.062A - 5A • Encapsulated and sealed (1mm minimum) • 0.062A - 5A range options • RoHS compliant • Designed to operate within environments where there is danger of gas explosion from faulty circuits Electrical Characteristics for Series % of Ampere Rating Opening Time 100% 4 Hours, Minimum 200% 5 Seconds, Maximum • ATEX and IECEx certified components Applications • Testing, measuring or processing electronic and electrical equipment Reference Standards Additional Information Agency Standards ATEX EN 60079-0, EN 60079-11 IECEx IEC 60079-0, IEC 60079-11 Datasheet Samples Resources Electrical Specifications by Items Ampere Rating (A) Amp Code 0.062 .062 Interrupting Rating Nominal Melting I2t (A2 Sec.) 0.00011 Minimum Cold Minimum Cold Resistance at Resistance at -20°C (Ohms) -40°C (Ohms) 4.89 4.39 Agency Approvals Nominal Cold Resistance at 25°C (Ohms) 7.00 x x x 0.125 .125 0.0012 1.35 1.26 1.70 x x x 0.250 .250 0.0095 0.51 0.48 0.665 x x x 0.375 .375 0.500 .500 0.750 50A @ 125 VAC 0.025 0.32 0.29 0.395 x x x 300A @ 125 VDC 0.0598 0.24 0.22 0.302 x x x .750 0.153 0.14 0.12 0.175 x x x 1.00 001. 0.256 0.10 0.07 0.128 x x x 3.00 003. 1.27 0.03 0.01 0.03 x x x 4.14 0.01 0.005 0.0158 x x x 5.00 005. 50A @ 125 VAC 300A @ 63 VDC 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. © 2016 Littelfuse, Inc. Specifications are subject to change without notice. Application testing is strongly recommended. Revised: 01/04/16 Special Application Fuses PICO® 259 Series Safe-T-Plus Fuse for Hazardous Locations 259 Series 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 100 5A Operating Temperature 3.15 A Body : Polyamide Terminals - Tin Plated Copper Alloy Max. operating temperature of materials 130°C .250 A .375 A .500 A .750 A 1A Materials .062 A Average Time Current Curves .125 A Product Characteristics TIME IN SECONDS 10 Temperature Re-rating Curve 1 0.1 0.01 0.001 0.1 100 10 CURRENT IN AMPERES 1 1000 Part Numbering System 0259.062M Note: 1. Re-rating depicted in this curve is in addition to the standard derating of 25% for continuous operation. Soldering Parameters Recommended Process Parameters: Wave Parameter Lead-Free Recommendation Preheat: (Depends on Flux Activation Temperature) (Typical Industry Recommendation) Temperature Minimum: 100°C Temperature Maximum: Preheat Time: 150°C 60-180 seconds Solder Pot Temperature: 260°C Maximum Solder Dwell Time: 2-5 seconds SERIES AMP 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 Specifications table. Example: 1 amp product is 0259001.M (.062 amp product shown). PACKAGING Code M = Bulk pack, 1000 pcs T = Bulk pack, 10 pcs Dimensions (.512") 13mm 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 (.025") .635mm (.315") 8mm (.197") 5mm (.394") 10mm Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Bulk N/A 1000 Bulk N/A 10 M = Bulk 1000 pieces, T = Bulk 10 pieces Please refer to available quantities above in “Part Numbering System” © 2016 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/04/16