1/4" x 1-1/4" Fuses MDA Series, Time Delay, Ceramic Tube Description • Time Delay, ceramic tube • Optional leaded version available • 1/4 x 1-1/4 (6.3mm x 32mm) physical size • Ceramic tube, nickel-plated brass endcap construction • UL Listed product meets standard 248-14 ELECTRICAL CHARACTERISTICS Rated Current Amp Rating Opening Time 100% None 1/4 - 30A 135% 60 Minutes Max. 200% 120 Seconds Max. Approvals • UL Listed Card: MDA 2/10 - 20A (Guide JDYX, File E19180) • UL Recognized Card: MDA 25 - 30A (Guide JDYX2, File E19180) • CSA Certification Card: MDA 2/10 - 15 (Class No. 1422-01) Environmental Data • Shock: 1/100A and 8/10A – MIL-STD-202, Method 213, Test Condition I; 1A thru 30A – MIL-STD-202, Method 207, (HI Shock) • Vibration: 1/100A and 8/10A – MIL-STD-202, Method 201; 1/4A thru 30A – MIL-STD-202, Method 204, Test Condition C (Except 5g, 500HZ) Ordering • Specify product code, option code and packaging code Dimensions (mm⁄in) Drawing Not to Scale SPECIFICATIONS Product Code MDA-1/4 MDA-1/2 MDA-3/4 MDA-1 MDA-1-1/2 MDA-2 MDA-2-1/2 MDA-3 MDA-4 MDA-5 MDA-6 MDA-7 MDA-8 MDA-10 MDA-15 MDA-20 MDA-25 MDA-30 * ** † ‡ Voltage Rating AC DC 250V 250V 250V 250V 250V 250V 250V 250V 250V 250V 250V 250V 250V 250V 250V 250V 125V 250V 125V 250V 125V AC Interrupting Rating* 250V 125V 35A 10000A 35A 10000A 35A 10000A 35A 10000A 100A 10000A 100A 10000A 200A 10000A 200A 10000A 200A 10000A 200A 10000A 200A 10000A 200A 10000A 200A 10000A 200A 10000A 750A 10000A 1500A 10000A 1500A 10000A 1500A 10000A DC Interrupting Rating 125V 10000A 10000A 10000A Typical DC Cold Resistance** (ohms) 9.325 1.925 0.8555 0.560 0.2585 0.1645 0.06685 0.0507 0.0346 0.02355 0.01850 0.01475 0.01230 0.00858 0.00543 0.00405 0.00309 0.00243 Typical Melting I2t† AC 0.68 2.3 7.8 11.1 25.0 64.0 28.9 40.9 134.0 345.9 534.3 580.3 944.0 1491.3 206.2 439.5 667.9 997.0 Typical Voltage Drop‡ 4.00 1.42 1.31 1.03 0.691 0.623 0.213 0.182 0.162 0.145 0.141 0.137 0.134 N/A 0.107 0.095 0.105 0.110 Interrupting Ratings (Measured at 70% - 80% power factor on AC. The interrupting ratings for 25Amp, 30Amp were measured at 90% - 100% power factor on AC) DC Cold Resistance (Measured at ≤10% of rated current) Typical Melting I2t (A2Sec) (I2t was measured at listed interrupting rating and rated voltage) Typical Voltage Drop (Voltage drop was measured at 25°C ambient temperature at rated current) 1/4" x 1-1/4" Fuses MDA Series, Time Delay, Ceramic Tube TIME CURRENT CURVE 10 12 15 20 25 30 3-2/10 4 5 6-1/4 2 1 1/2 TIME IN SECONDS TIME IN SECONDS 1/4 CURRENT IN AMPERES CURRENT IN AMPERES OPTION CODE Option Code B V Description Board Washable - Hermetically sealed to withstand aqueous cleaning Axial leads - brass overcaps with copper and nickel flash, plated in tin lead PACKAGING CODE Packaging Code BK BK1 BK8 OC-2545 10/01 © Cooper Electronic Technologies 2001 Description 100 pieces of fuses packed into a cardboard carton with flaps folded 1,000 pieces of fuses packed into a cardboard carton with flaps folded 8,000 pieces of fuses packed into a cardboard carton with flaps folded Visit us on the Web at www.cooperET.com 3601 Quantum Boulevard Boynton Beach, Florida 33426-8638 Tel: +1-561-752-5000 Toll Free: +1-888-414-2645 Fax: +1-561-742-1178 This bulletin is intended to present product design solutions and technical information that will help the end user with design applications. Cooper Electronic Technologies reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Cooper Electronic Technologies also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.