20 Series Vitreous Enamel Conformal Axial Terminal Wirewound, 5% Tolerance Std. FeatureS • Rugged vitreous enamel coating withstands high The 20 Series axial terminal resistors are both humidity and temperature cycling. durable and economical. They have all the electrical • Durable construction, recommended for industrial attributes of the more expensive 90 Series resistors, applications where reliability is paramount. including all-welded construction. They offer the durability of a lead free conformal • All-welded construction. vitreous enamel coating and are ideal for computer, • Flame resistant lead free vitreous enamel coating. communications and industrial applications in which • RoHS compliant; Add “E” suffix to part number to cost, quality, and reliability are key considerations. specify. SerieS SpeCiFiCationS Series Wattage Ohms Max. Voltage* 21 1 1.0-3.0K 75 22 2 1.0-3.0K 65 23 3 0.1-10K 135 25 5 0.1-28K 330 27 7 0.1-25K 450 20 10 0.1-100K 720 12.5 watt size available on special order *Maximum Voltage is based on Ohm’s Law [V=√(P*R)] as limited by the resis- tance value of specified product CharaCteriStiCS Coating Conformal lead free vitreous enamel Core Ceramic. Terminals Solder-coated axial. RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu Derating Linearly from 100% @ +25°C to 0% @ +350°C Tolerance ±5% standard; other tolerances available Power rating Based on 25°C free air rating (other wattages available) Overload Under 7 watts: 5 times rated wattage for 5 seconds; 7 watts and over: 10 times rated wattage for 5 seconds Temperature coefficient 1 to 9.99 ohms: ±50 ppm/°C; 10 ohms and over: ±30 ppm/°C DimenSionS (in./mm max.) Series Wattage Length* (max.) Diam.* (max.) Lead ga. 21 1 0.421 / 10.7 0.156 / 4.0 24 1.5 in. / 38.1mm L D 22 2 0.421 / 10.7 0.219 / 5.6 20 min. 23 3 0.515 / 13.1 0.220 / 5.6 20 25 5 1.015 / 25.8 0.276 / 7.0 20 27 7 1.265 / 32.1 0.394 / 10.0 20 20 10 1.859 / 47.2 0.394 / 10.0 20 *For units below 1Ω, add 15% to body diameter, 10% to body length. (continued) 80 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com

20 Series Vitreous Enamel Conformal Axial Terminal Wirewound, 5% Tolerance Std. orDerinG inFormation Standard part numbers Wattage Wattage Wattage Ohmic value PPSaruerffftii xxN o. 21J ––– 1 22J ––– 2 23J ––– 3 25J ––– 5 27J ––– 7 20J ––– 10 Ohmic value PPSaruerffftii xxN o. 21J ––– 1 22J ––– 2 23J ––– 3 25J ––– 5 27J ––– 7 20J ––– 10 Ohmic value PPSaruerffftii xxN o. 21J ––– 1 22J ––– 2 23J ––– 3 25J ––– 5 27J ––– 7 20J ––– 10 0.10 ––– R10    62 –––62R       1,800 –––1K8       0.13 ––– R13    68 –––68R       2,000 –––2K0       0.15 ––– R15    75 –––75R       2,200 –––2K2       0.20 ––– R20    82 –––82R       2,500 –––2K5       0.25 ––– R25    100 –––100       2,700 –––2K7       0.30 ––– R30    120 –––120       3,000 –––3K0       0.33 ––– R33    125 –––125       3,300 –––3K3     0.50 ––– R50    150 –––150       3,500 –––3K5     0.75 ––– R75    180 –––180       3,900 –––3K9     1 ––– 1R0       200 –––200       4,000 –––4K0     1.5 –––1R5       220 –––220       4,500 –––4K5     2 –––2R0       225 –––225       4,700 –––4K7     2.2 –––2R2       250 –––250       5,000 –––5K0     3 –––3R0       270 –––270       6,000 –––6K0     4 –––4R0       300 –––300       6,800 –––6K8     5 –––5R0       330 –––330       7,000 –––7K0     7.5 –––7R5       350 –––350       7,500 –––7K5     10 –––10R       390 –––390       8,000 –––8K0     12 –––12R       400 –––400       9,000 –––9K0     15 –––15R       450 –––450       10,000 –––10K     18 –––18R       470 –––470       12,000 –––12K    20 –––20R       500 –––500       13,000 –––13K   22 –––22R       560 –––560       15,000 –––15K    25 –––25R       600 –––600       17,000 –––17K   27 –––27R       680 –––680       20,000 –––20K    30 –––30R       750 –––750       22,000 –––22K    33 –––33R       800 –––800       25,000 –––25K    35 –––35R       820 –––820       30,000 –––30K  39 –––39R       900 –––900       33,000 –––33K  40 –––40R       1,000 –––1K0       35,000 –––35K  47 –––47R       1,100 –––1K1       40,000 –––40K  50 –––50R       1,200 –––1K2       50,000 –––50K  56 –––56R       1,500 –––1K5        = Standard values Shaded values involve very fine resistance wire and should not be used in critical applications without burn-in and/or thermal cycling.  = Non-standard values subject to minimum handling charge per item RoHS Compliant 21JR10E 20 Series Wattage Tolerance Resistance Value Vitreous Enamel 1= 1W J = 5% R10= 0.10Ω Axial Lead 2 1R0= 1.0Ω Wirewound 3 10R=10.0Ω 5 250= 250Ω 7 1K0= 1,000Ω 0=10W 4K5= 4,500Ω 50K=50,000Ω rev 6/20-1 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 81