SURFACE MOUNT FUSES SUBMINIATURE SURFACE MOUNT NANO2® SMF Slo-Blo ® Type Fuse ® ® The very small NANO2 Fuse with time delay performance characteristics. The unique time delay feature of this fuse design helps solve the problem of nuisance “opening” by accommodating inrush currents that normally cause a fastacting fuse to open. ELECTRICAL CHARACTERISTICS: Opening Time 4 hours, Minimum 200% 1 second, Min.; 60 seconds, Max. 300% 800% 0.2 seconds, Min.; 3 seconds, Max. 0.02 seconds, Min.; 0.1 seconds, Max. 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 50 amperes at 125 VDC 300 amperes at 32 VDC 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). PHYSICAL SPECIFICATIONS: Materials: Body: Ceramic Terminations: Tin-Lead Alloy or Silver Plated Brass Caps. Soldering Parameters: 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 EIA-RS481 (IEC 286, part 3); 1,000 per reel. Marking: The 452/454 series Slo-Blo fuse marking includes the letter “T” to designate time delay characteristics. 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 Voltage Rating 125 125 125 125 125 125 125 125 125 125 125 Nominal Nominal Resistance Melting I 2t Cold Ohms A2 Sec. 1.60 0.101 0.940 0.240 0.460 0.904 0.270 1.98 0.116 3.65 0.0760 8.20 0.0540 15.0 0.0414 20.16 0.0224 26.53 0.0186 34.40 0.0136 53.72 6.86 (.270") 6.10 (.240") 3.15 (.124") LF T 1A 2.95 1.96 (.116") (.077") Recommended pad layout 1.45 (.057") 2.69 (.106") Note: Metric dimensions shown. Inch dimensions are in parentheses. 2.69 (.106") Average Time Current Curves 3/8A 1/2A 3/4A 1A 1 1/2A 2A 2 1/2A 3A 3 1/2A 4A 5A 100% 1000 100 TIME IN SECONDS % of Ampere Rating 10 1 0.1 0.01 0.1 1 10 100 CURRENT IN AMPERES 1000 Refer to pg. 102 for SMF Omni-Blok® Holder, Series 154 000T. 35