Special Application Fuses 242 Series Barrier Fuse RoHS 242 Series Barrier Fuse Description The 242 Series fuse is designed for barrier circuits in intrinsic safety applications relating to Hazardous Locations. Ranging from 40mA to 250mA, the 242 Series provides overcurrent protection solutions to fit many Hazardous Location barrier applications. Features High interrupting rating Available in both axial suitable for intrinsic lead and surface mount. safety protection of RoHS compliant and hazardous locations Halogen-free. equipment. Agency Approvals Agency Agency File Number Ampere Range Applications E10480 0.040A - 0.250A Intrinsic saftey electrical Barriers providing equipment Electrical intrinsically safe outputs to connections and Hazardous Locations components Test equipment Electrical Characteristics % of Ampere Opening Time Additional Information Rating 100% 4 hours, Minimum 300% 10 seconds, Maximum 1000% 0.002 seconds, Maximum Datasheet Resources Samples Electrical Characteristics Agency Nominal Body Approvals Ampere Rating Interrupting Cold Nominal Melting Amp Code Color 2 2 (A) Rating Resistance I t (A Sec.) Coding (Ohms) 0.040 .040 Gold 16.48 0.000078 x 0.050 .050 Red 11.34 0.000103 x 0.080 .080 Green 8.19 0.000214 x 0.100 .100 Blue 3.60 0.000977 x 4000A 250VAC/VDC 0.125 .125 Orange 3.78 0.001026 x 0.160 .160 Violet 3.00 0.00157 x 0.200 .200 Brown 2.68 0.0025 x 0.250 .250 Black 1.6 0.00579 x 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. Specifications are subject to change without notice. Application testing is strongly recommended. Revised: 05/31/18Special Application Fuses 242 Series Barrier Fuse Temperature De-Rating Curve Average Time Current Curves 140% 100 120% 100% 80% 10 60% 40% 20% 1 0% -55 -35 -15 5 25 -45 65 85 105 125 Temperature (C) 0.1 0.01 0.001 0.0001 0.01 0.1 110 100 1000 CURRENT IN AMPERES Soldering Parameters Reflow Condition Pb Free assembly t P T P - Temperature Min (T ) 150C Critical Zone s(min) Ramp-up T to T L P Pre Heat - Temperature Max (T ) 200C s(max) T L t - Time (min to max) (t ) 60 180 secs L s T S(max) Average ramp up rate (Liquidus Temp 5C/second max Ramp-down (T ) to peak L Preheat T S(min) T to T - Ramp-up Rate 5C/second max S(max) L t S - Temperature (T ) (Liquidus) 217C L Reflow - Temperature (t ) 60 150 seconds 25 L time to peak temperature +0/-5 Peak Temperature (T ) 250 C Time (t 25C to peak) P Time within 5C of actual peak Temp. (t ) 20 40 seconds p Ramp-down Rate 5C/second max Time 25C to peak Temperature (T ) 8 minutes Max. P Wave Soldering 260C, 10 seconds max. Do not exceed 260C Material Information Product Characteristics O O 40 C to 125 C (Consider re- Body Ceramic Operating Temperature rating) Leads Tin-Plated Copper O Withstands 5 cycles of 55 C to Thermal Shock O 125 C Endcaps Silver-Plated Brass Vibration Per MIL-STD-202 Method 201 Insulation Resistance Greater than 10,000 ohms. (After Opening) 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 05/31/18 Percent of Rating TIME IN SECONDS .040A .050A .080A .100A .125A .160A .200A .250A Temperature