R452001.

Next Previous Surface Mount Fuses Subminiature Surface Mount NANO2® Slo-Blo ® Fuse 452/454 Series ® ® The NANO2 Slo-Blo fuse has enhanced inrush withstand characteristics over the NANO2 Fast-Acting fuse. The unique time delay feature of this fuse design helps solve the problem of nuisance “opening” by accommodating inrush currents that normally cause a fast-acting fuse to open. ELECTRICAL CHARACTERISTICS: % of Ampere Rating 100% 200% 300% 800% Opening Time 4 hours, Minimum 1 second, Min.; 60 seconds, Max. 0.2 seconds, Min.; 3 seconds, Max. 0.02 seconds, Min.; 0.1 seconds, Max. 6.86 (.270") 3.15 (.124") 2.95 1.96 (.116") (.077") Recommended pad layout 1.45 (.057") 6.10 (.240") F AGENCY APPROVALS: Recognized under the Components Program of Underwriters Laboratories and Certified by CSA. AGENCY FILE NUMBERS: UL E10480, CSA LR 29862. INTERRUPTING RATINGS: 50 amperes at 125 VAC/VDC T 1A 2.69 (.106") 2.69 (.106") ENVIRONMENTAL SPECIFICATIONS: Operating Temperature: – 55°C to 125°C. Shock: MIL-STD-202, Method 213, Test Condition I (100 G’s peak for 6 milliseconds). Vibration: MIL-STD-202, Method 201 (10 – 55 Hz, .06 in. total excursion). Salt Spray: MIL-STD-202, Method 101, Test Condition B (48 hrs.). Insulation Resistance (After Opening): MIL-STD-202, Method 302, Test Condition A, (10,000 ohms minimum). Resistance to Soldering Heat: MIL-STD-202, Method 210, (3 sec. at 260°C). Thermal Shock: MIL-STD-202, Method 107, Test Condition B (– 65 to 125°C). Moisture Resistance: MIL-STD-202, Method 106, High Humidity (90-98 RH), Heat (65°C). Average Time Current Curves 3/8A 1/2A 3/4A 1A 1 1/2A 2A 2 1/2A 3A 3 1/2A 4A 5A 7 SURFACE MOUNT FUSES 1000 PHYSICAL SPECIFICATIONS: Materials: Body: Ceramic Terminations: Tin-Lead Alloy or Silver Plated Brass Caps. 100 Soldering Parameters: TIME IN SECONDS Wave Solder — 260°C, 3 seconds maximum Reflow Solder — 230°C, 30 seconds maximum Solderability: MIL-STD-202, Method 208. PACKAGING SPECIFICATIONS: 12mm Tape and Reel per EIARS481-1 (IEC 286, part 3); 1,000 per reel; 5,000 piece reel also available. Marking: The 452/454 series Slo-Blo fuse marking includes the letter “T” to designate time delay characteristics. 10 PATENTED ORDERING INFORMATION: Tin-Lead Plated Catalog # R452.375 R452.500 R452.750 R452 001. R452 01.5 R452 002. R452 02.5 R452 003. R452 03.5 R452 004. R452 005. Silver Plated Ampere Catalog # Rating 0454.375 3/8 0454.500 1/2 0454.750 3/4 0454 001. 1 0454 01.5 11/2 0454 002. 2 0454 02.5 21/2 0454 003. 3 0454 03.5 31/2 0454 004. 4 0454 005. 5 Nominal Nominal Resistance Melting I 2t Cold Ohms A2 Sec. 1.20 0.101 0.700 0.240 0.360 0.904 0.225 1.98 0.0930 3.65 0.0625 8.20 0.0450 15.0 0.0340 20.16 0.0224 26.53 0.0186 34.40 0.0136 53.72 1 Voltage Rating 125 125 125 125 125 125 125 125 125 125 125 0.1 0.01 0.1 1 10 100 CURRENT IN AMPERES 1000 Refer to pg. 271 for SMF Omni-Blok® Holder, Series 154 000T. 269 w w w. l i t t e l f u s e . c o m