42 axial lead and cartridge fuses subminiature pico ii very fast-acting type fuse the pico ii very fast-acting fuse is designed to meet an extensive array of performance characteristics in a space- saving subminiature package. electrical characteristics: % of ampere ampere opening rating rating time 100% 1/16 ?5 4 hours, min imum 1/16 ? 1 second, max imum 200% 10 3 seconds, max imum 12 ?5 10 seconds, max imum 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. reference to mil spec: available in military qpl type fm10, conforming to mil-prf-23419. to order, change 251 to 253 as shown below. interrupting ratings: 300 amperes at 125 vdc. 50 amperes at 125 vac. environmental specifications: operating temperature: 55? to 125?. 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); method 204, test condition c (55 2000 hz at 10 g s peak). moisture resistance: mil-std-202, method 106. physical specifications: materials: encapsulated, epoxy-coated body; solder coated copper wire leads. soldering parameters: wave solder ?260?, 10 seconds maximum. solderability: mil-std-202, method 208. lead pull force: mil-std-202, method 211, test condition a (will withstand a 7 lb. axial pull test). packaging specifications: tape and reel per eia- 296; t1: 2.062" (52.4mm) taped spacing; 5,000 per reel. option: radial lead version; 0.4" lead spacing; to order, change 251 to 252 . patented ordering information: 100 10 1 0.1 0.01 0.001 1/16a 0.05 0.1 1 10 100 1000 1/8a 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 time in seconds current in amperes std. type mil. type nominal nominal catalog catalog ampere voltage resistance melting i 2 t number number rating rating cold ohms a 2 sec. r251 .062 r253 .062 1/16 125 7.0 0.000113 r251 .125 r253 .125 1/8 125 1.70 0.00174 r251 .250 r253 .250 1/4 125 0.665 0.0116 r251 .375 r253 .375 3/8 125 0.395 0.0296 r251 .500 r253 .500 1/2 125 0.280 0.0598 r251 .750 r253 .750 3/4 125 0.175 0.153 r251 001 r253 001 1 125 0.128 0.256 r251 01.5 r253 01.5 1 1 / 2 125 0.0823 0.587 r251 002 r253 002 2 125 0.0473 0.405 r251 02.5 2 1 / 2 125 0.0360 0.721 r251 003 r253 003 3 125 0.0290 1.19 r251 03.5 3 1 / 2 125 0.0240 1.58 r251 004 r253 004 4 125 0.0204 2.45 r251 005 r253 005 5 125 0.0155 4.14 r251 007 r253 007 7 125 0.0105 10.4 r251 010 r253 010 10 125 0.00705 25.5 r251 012 12 32 0.0055 45.2 r251 015 r253 015 15 32 0.00446 68.8 average time current curves qpl f l 1 a 1.5" 1.5" .280" ref. epoxy coating .025" dia. .095" dia. ref. note: .025" diameter for 1 / 16 10a, .032" diameter for 12 15a. note: higher ampere ratings available. contact technical assistance for details
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