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 Features Agency Agency File Number Ampere Range • Encapsulated and sealed • Suitable for use in Class (1mm minimum) I, Groups A, B, C and Baseefa02ATEX0071U 0.062A - 5A D; Class II, Groups E, • 0.062A - 5A range options F and G; Class III and IECEx BAS 10.0098U 0.062A - 5A • Designed to operate Class I, Zone 0, AEx ia IIC E10480 0.062A - 5A within environments Hazardous Locations. E358130 where there is danger of • Suitable for use in Gas, gas explosion from faulty Zone 0 Hazardous circuits Electrical Characteristics for Series Locations per IEC and EN • ATEX and IECEx certified 60079 Series % of Ampere components Opening Time Rating • RoHS compliant 100% 4 Hours, Minimum 200% 5 Seconds, Maximum Reference Standards Applications Agency Standards • Testing, measuring or processing electronic and ATEX EN 60079-0, EN 60079-11 electrical equipment IECEx IEC 60079-0, IEC 60079-11 Additional Information UL UL 913, UL 60079-0, UL 60079-11 Datasheet Resources Samples © 2018 Littelfuse, Inc. Application testing is strongly recommended. Specifications are subject to change without notice. Revised: 05/31/18

Special Application Fuses PICO® 259 Series Safe-T-Plus Fuse for Hazardous Locations Electrical Specifications by Items Ampere Nominal Minimum Cold Minimum Cold Nominal Cold Agency Approvals Amp Interrupting Rating Melting Resistance at Resistance at Resistance at Code Rating (A) I2t (A2 Sec.) -20°C (Ohms) -40°C (Ohms) 25°C (Ohms) 0.062 .062 0.00011 4.89 4.39 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 50A @ 125 VAC 0.025 0.32 0.29 0.395 x x x 0.500 .500 300A @ 125 VDC 0.0598 0.24 0.22 0.302 x x x 0.750 .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 50A @ 125 VAC 5.00 005. 4.14 0.01 0.005 0.0158 x x x 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. 259 Series Product Characteristics Average Time Current Curves Body : Polyamide A A AAAA A Materials Terminals - Tin Plated Copper Alloy 62 25 50 75 00 50 A 15 A Max. operating temperature of materials 130°C 100.0 .1 .2.3.5.71 3. 5 Operating temperature depends on fuse Operating rating and max. allowed fuse surface Temperature temperature. (Consider re-rating) Thermal Shock Withstands 5 cycles of – 55°C to 125°C 10 Vibration Per MIL-STD-202, Method 201 Insulation S Resistance Greater than 10,000 ohms ND (After Opening) CO 1 E S N E I M Temperature Re-rating Curve TI 0.1 0.01 0.001 0.1 1 10 100 1000 CURRENT IN AMPERES Note: 1. Re-rating depicted in this curve is in addition to the standard derating of 25% for continuous operation. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 05/31/18

Special Application Fuses PICO® 259 Series Safe-T-Plus Fuse for Hazardous Locations 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: 150°C Preheat Time: 60-180 seconds Solder Pot Temperature: 260°C Maximum Solder Dwell Time: 2-5 seconds 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 Dimensions Part Numbering System (.512") 0259.062M 13mm SERIES (.315") 8mm (.197") AMP Code (.025") 5mm The dot is poisitioned before the Example: .635mm (.394") Packaging Suffix with whole ratings 1 amp product is 10mm and within the numbering sequence 0259001.M for fractional ratings. Refer to Amp (.062 amp product shown). Code column in the Electrical Speci- fications table. PACKAGING Code M = Bulk pack, 1000 pcs T = Bulk pack, 10 pcs Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Bulk N/A 1000 M = Bulk 1000 pieces, T = Bulk 10 pieces Bulk N/A 10 Please refer to available quantities above in “Part Numbering System” Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 05/31/18