1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 110 250 series thin stackohm? vitreous enamel power series wattage ohms max. voltage* f10 10 1.0-15k 187 f20 20 1.0-50k 815 f30 30 1.0-10k 281 f40 40 1.0-25k 655 f55 55 1.0-30k 1405 adjustable versions and other sizes available; consult ohmite also available in low cost centohm or silicone coating; consult ohmite. * maximum voltage is based on ohms law [v=p*r] as limited by the resis - tance value of specified product ? small size-to-power ratio. ? stackable ? integral mounting bracket conducts heat to mounting surface. ? low profile for use in equipment where space is limited. ? all-welded construction. ? rohs compliant product available. add e suffix to part number to specify. when limited space is a consideration, choose ohmites thin stackable 250 type resistors. these oval-shaped ceramic-core resistors feature a low profile to permit installation in spaces with height restrictions. they are also equipped with integral mounting brackets so they can be fastened to a chassis and stacked in locations with limited surface area. when properly fastened, the mounting brackets add a heat sinking benefit resulting in a smaller size per watt. durable 250 type resistors are fully welded and coated with lead free vitreous enamel. coating lead free vitreous enamel core ceramic terminals tinned lug with hole. rohs solder composition is 96% sn, 3.5% ag, 0.5% cu derating linearly from 100% @ +25c to 0% @ +350c tolerance 5% (j) power rating based on mounting a single resistor on a metal surface measuring 10 (254mm) square by 0.04 (1.016mm) thick. reduce rating by 15% when mounting on non-metallic surface overload 10x rated wattage for 5 seconds if max. voltage is not exceeded temperature coefficient 1 to 20: 400 ppm/c over 20: 260 ppm/c dielectric with - standing voltage 500 vac: 10 and 20 watt rating. 1000 vac: 30, 40 and 55 watt rating (mea - sured from lug to mounting bracket) max. amps to calculate, use the formula p/r characteristics serie s specif ications feature s
1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 111 series wattage length l length a f10 10 0.750 / 19.050 1.000 / 25.400 f20 20 2.000 / 50.800 2.313 / 58.750 f30 30 1.250 / 31.750 2.000 / 50.800 f40 40 2.000 / 50.800 2.750 / 69.850 f55 55 3.500 / 88.900 4.250 / 107.950 0.625" 15.875 mm 0.031" 0.794 mm 0.125" 3.175 mm diam. 0.063" 1.588 mm diam. 0.125" 3.175 mm l a 0.110": 2.776 mm 0.250" 6.350 mm 0.375" 9.525 mm 10w & 20w 0.125" 3.175 mm 0.188" 4.763 mm diam. 0.109" 2.776 mm diam. 0.196" 4.979 mm l a 0.250" 6.350 mm 0.125" 3.175 mm 0.438" 11.113 mm 30w , 40w & 55w 0.375" 9.525 mm 0.125" * 3.175 mm 1.000" 25.400 mm 0.250" * 6.350 mm 0.938" 23.813 mm 0.375" 9.525 mm *reference dimension only; varies according to resistance value. note: when resistors are stacked, use washers or spacers as required to insure clearance and improve power dissipa - tion. thin stackohm? vitreous enamel power dimensions (in. / mm) 0.625" 15.875 mm 0.031" 0.794 mm 0.125" 3.175 mm diam. 0.063" 1.588 mm diam. 0.125" 3.175 mm l a 0.110": 2.776 mm 0.250" 6.350 mm 0.375" 9.525 mm 0.125" 3.175 mm 0.188" 4.763 mm diam. 0.109" 2.776 mm diam. 0.196" 4.979 mm l a 0.250" 6.350 mm 0.125" 3.175 mm 0.438" 11.113 mm t t b w w b 0.094" 2.381 mm 0.125" 3.175 mm diam. 0.063" 1.588 mm diam. 0.196" 4.979 mm l a 0.125" 3.175 mm 0.438" 11.113 mm t b 0.813" 20.638 mm core size core size core size 0.125" 3.175 mm 0.188" 4.763 mm diam. 0.109" 2.776 mm diam. 0.196" 4.979 mm l a 0.125" 3.175 mm 0.438" 11.113 mm (ss) t b w core size 0.188" 4.763 mm 0.250" 6.350 mm 0.531" 13.494 mm (ssh) 0.125" 3.175 mm 0.188" 4.763 mm diam. 0.109" 2.776 mm 0.156" x0.313" 3.969 x 7.938 mm slot l a 0.5" 12.7 mm t b w core size 0.188" 4.763 mm brackets cemented in core mounting in addition to the standard box bracket, stud type brackets are available for stacking the standard size resistors. stud type brackets are available in two heights: standard (ss, 0.437/11.113mm) and high (ssh, 0.531/13.494mm). the ssh stud is recommended when stacking the adjustable type 260, as it assures clearance for the adjustable lugs to pass eachother. spacer washer no. 6027 (o.d. 0.219/5.556mm, i.d. 0.125/3.175mm, thickness 0.094/2.381mm) is recom- mended for use with the miniature adjustable and fixed resis- tors to provide clearance, as explained above, or increased wattage. see chart. derating for stacked mounting stacked resistors should be derated to prevent excessive tem- peratures due to proximity. approximate ratings are given in the table. 2 70 70 75 3 60 60 69 4 50 50 60 miniature with 0.094 (2.381 mm) spacer washer miniature std. or inter. percent of single unit rating no. of resistors (continued)
1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 112 250 series thin stackohm? vitreous enamel power co re and termin al selection for made to order type 250 stackohm resistors miniature 10 0.750 (19.050mm) 0.375 (9.525mm) 0.125 (3.175mm) 1 15,000 ta 1 1.000 (25.400mm) 0.375 (9.525mm) 51 15 1.000 (25.400mm) 0.375 (9.525mm) 0.125 (3.175mm) 1 25,000 ta 1 1.250 (31.750mm) 0.375 (9.525mm) 51 20 2.000 (50.800mm) 0.375 (9.525mm) 0.125 (3.175mm) 1 50,000 ta 1 2.313 (58.750mm) 0.375 (9.525mm) 51 12 0.688 (17.463mm) 0.594 (15.081mm) 0.234 (5.953mm) 1 20,000 tb ** 51 intermediate 21 1.000 (25.400mm) 0.813 (20.638mm) 0.250 (6.350mm) 1 8,000 td 2 1.313 (33.350mm) 0.594 (15.081mm) 51 25 1.500 (38.100mm) 0.813 (20.638mm) 0.250 (6.350mm) 1 15,000 td 2 1.813 (46.050mm) 0.594 (15.081mm) 51 standard 30 1.250 (31.750mm) 1.000 (25.400mm) 0.250 (6.350mm) 1 10,000 te 5 1.750 (44.450mm) 0.938 (23.813mm) 57 3, 4 2.000 (50.800mm) 40 2.000 (50.800mm) 1.000 (25.400mm) 0.250 (6.350mm) 1 25,000 te 5 2.500 (63.500mm) 0.938 (23.813mm) 57 3, 4 2.750 (69.850mm) 55 3.500 (88.900mm) 1.000 (25.400mm) 0.250 (6.350mm) 1 30,000 te 5 4.000 (1.1.600mm) 0.938 (23.813mm) 57 3, 4 4.250 (107.950mm) 70 4.750 (120.650mm) 1.000 (25.400mm) 0.250 (6.350mm) 1 120,000 ? te 5 5.250 (133.350mm) 0.938 (23.813mm) 57 3, 4 5.500 (139.700mm) 95 6.000 (152.400mm) 1.000 (25.400mm) 0.250 (6.350mm) 1 150,000 ? te 5 6.500 (165.100mm) 0.938 (23.813mm) 57 3, 4 6.750 (171,450mm) free air wattage rating* length l width w thickness t code for core dia. min. ohms max. practical ohms standard terminal fig. no. dimension a dimension b *based on mounting on steeel panel 10 (254mm) x 10 x 0.040 (1.016mm). ? inside dimensions of core are: 0.250 (6.350mm) x 0.047 (1.191mm) for ta; 0.406 (10.319mm) x 0.047 (1.191mm) for tb; 0.438 (11.113mm) x 0.063 (1.588mm) for td; 0.672 (17.069mm) x 0.063 (1.588mm) for te. core dimensions ? ? these sizes are ohmicone (silicone-ceramic) coatedCtype 450-460. **user supplies brackets. 1 CCC1r0e 1.5 CCC 1r5e 2 CCC2r0e 3 CCC 3r0e 4 CCC 4r0e 5 CCC5r0e 7.5 CCC7r5e 10 CCC10re 15 CCC15re 20 CCC20re 25 CCC25re 30 CCC30re 40 CCC40re 50 CCC50re 75 CCC75re 100 CCC100e 150 CCC150e 200 CCC200e 250 CCC250e 300 CCC300e 400 CCC400e 500 CCC500e 750 CCC750e 800 CCC800e 1,000 CCC1k0e 1,250 CCC1k25e 1,500 CCC1k5e 2,000 CCC2k0e 2,500 CCC2k5e 3,000 CCC3k0e 4,000 CCC4k0e 5,000 CCC5k0e 6,000 CCC6k0e 7,500 CCC7k5e 10,000 CCC10ke 15,000 CCC15ke 20,000 CCC20ke 25,000 CCC25ke 40,000 CCC40ke = standard values; check availability at www.ohmite.com ohmic value f10jCCC 10 f20jCCC 20 f30jCCC 30 f40jCCC 40 wattage part no. prefix suffix f55jCCC 55 ohmic value f10jCCC 10 f20jCCC 20 f30jCCC 30 f40jCCC 40 wattage part no. prefix suffix f55jCCC 55 wattage ohmic value f10jCCC 10 f20jCCC 20 f30jCCC 30 f40jCCC 40 part no. prefix suffix f55jCCC 55 see web - site for custom core info to lerance f= 1% h= 3% j= 5% k= 10% ohms 1r0 = 1 250 = 250 1k0 = 1,000 25k = 25,000 25k5 = 25,500 rohs compliant series w attage coating blank =v itreous c= centohm s= silicone ohms example: 1r00 = 1 250r = 250 1k00 = 1,000 25k0 = 25,000 25k5 = 25,500 series v itreous enamel: 25 = 250 fixed 26 = 260 adjustable silicone ceramic: 45 = 450 fixed 46 = 460 adjustable w attage & core code see ?core and t erminal selection? t erminal t ype see ?resistor t erminals for t ubular cores? mounting brackets (user supplies bra ck et f or core tb ) b= stacking box s= stacking stud, std. height h= stacking stud high u= unit type rohs complian t to lerance j= 5% orderin g info rmation made-to-order parts standard values
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