SURFACE MOUNT FUSES SUBMINIATURE SURFACE MOUNT NANO2® SMF Very Fast-Acting Type Fuse ® ® The Nano2 SMF Fuse is a very small, square surface mount fuse that is also available in a surface mount holder. ELECTRICAL CHARACTERISTICS: Opening Time 4 hours, Minimum 200% 1/16 –10 12–15 5 seconds, Maximum 20 seconds, Maximum AGENCY APPROVALS: Recognized under the Components Program of Underwriters Laboratories and Certified by CSA. Approved by MITI from 1 through 5 amperes. AGENCY FILE NUMBERS: UL E10480, CSA LR 29862. INTERRUPTING RATINGS: 1/16 – 8A 50 amperes at 125 VAC/VDC 300 amperes at 32 VDC 10A 35 amperes at 125 VAC/50 amperes at 125 VDC 300 amperes at 32 VDC 12A – 15A 50 amperes at 65 VAC/VDC 300 amperes at 24 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). Salt Spray: MIL-STD-202, Method 101, Test Condition B. 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, Test Condition F (20 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, 10 seconds maximum Reflow Solder — 260°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, add packaging suffix, MR. PATENTED ORDERING INFORMATION: 6.86 (.270") 6.10 (.240") 3.15 (.124") LF 7A 1.45 (.057") 2.95 1.96 (.116") (.077") Recommended pad layout 2.69 (.106") Note: Metric dimensions shown. Inch dimensions are in parentheses. 2.69 (.106") Average Time Current Curves 1/4A 3/8A 1/2A 3/4A 1A 1 1/2A 2A 2 1/2A 3A 3 1/2A 4A 5A 7A 10A 12A 15A 1/16 –15 1/8A 100% 1/16A Ampere Rating 100 10 TIME IN SECONDS % of Ampere Rating 1 0.1 Tin-Lead Plated Catalog # – – R451.250 R451.375 R451.500 R451.750 R451 001. R451 01.5 R451 002. R451 02.5 R451 003. R451 03.5 R451 004. R451 005. R451 007. R451 010. R451 012. R451 015. 34 Silver Nominal Nominal Plated Ampere Voltage Resistance Melting I2t Catalog # Rating Rating Cold Ohms A2 Sec. R451.062 1/16 125 5.50 0.00019 R451.125 1/8 125 1.70 0.00286 0453.250 1/4 125 1.05 0.01126 0453.375 3/8 125 0.610 0.0425 0453.500 1/2 125 0.420 0.0795 0453.750 3/4 125 0.245 0.185 0453 001. 1 125 0.153 0.459 1 125 0.0630 0.853 0453 01.5 1 /2 0453 002. 2 125 0.0367 0.53 1 0453 02.5 2 /2 125 0.0286 1.029 0453 003. 3 125 0.0227 1.65 0453 03.5 31/2 125 0.0200 2.469 0453 004. 4 125 0.0160 3.152 0453 005. 5 125 0.0125 5.566 0453 007. 7 125 0.0090 10.32 0453 010. 10 125 0.0056 26.46 0453 012. 12 65 0.0049 47.97 0453 015. 15 65 0.0037 97.82 0.01 0.001 0.05 0.1 1 10 100 CURRENT IN AMPERES 1000 Refer to pg. 102 for SMF Omni-Blok® Holder, Series 154 000.