20SERIES OHMITE | Alldatasheet

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Technical content

1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com82

20 Series

Vitreous Enamel Conformal Axial Terminal Wirewound, 5% Tolerance Std. LD1.5 in. / 38.1mm 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 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 Series Wattage Length* (max.) Diam.* (max.) Lead ga. 21 1 0.421 / 10.7 0.156 / 4.0 24 22 2 0.421 / 10.7 0.219 / 5.6 20 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.

FeatureS

  • Rugged vitreous enamel coating withstands high humidity and temperature cycling.
  • Durable construction, recommended for industrial applications where reliability is paramount.
  • All-welded construction.
  • Flame resistant lead free vitreous enamel coating.
  • RoHS compliant; Add “E” suffix to part number to specify. The 20 Series axial terminal resistors are both durable and economical. They have all the electrical attributes of the more expensive 90 Series resistors, including all-welded construction. They offer the durability of a lead free conformal vitreous enamel coating and are ideal for computer, communications and industrial applications in which cost, quality, and reliability are key considerations. CharaCteriStiCS SerieS SpeCiFiCationS DimenSionS (in./mm max.) (continued)

1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 83 Ohmic value 21J––– 1 22J––– 2 23J––– 3 25J––– 5 27J––– 7 20J––– 10 Wattage Part No. Prefix  Suffix Ohmic value 21J––– 1 22J––– 2 23J––– 3 25J––– 5 27J––– 7 20J––– 10 Wattage Part No. Prefix  Suffix Ohmic value 21J––– 1 22J––– 2 23J––– 3 25J––– 5 27J––– 7 20J––– 10 Wattage Part No. Prefix  Suffix  = Standard values  = Non-standard values subject to minimum handling charge per item Shaded values involve very fine resistance wire and should not be used in critical applications without burn-in and/or thermal cycling. 30,000 –––30K  33,000 –––33K  35,000 –––35K  40,000 –––40K  50,000 –––50K  21JR10E R10 = 0.10Ω 1R0 = 1.0Ω 10R = 10.0Ω 250 = 250Ω 1K0 = 1,000Ω 4K5 = 4,500Ω 50K = 50,000Ω Tolerance J = 5% RoHS Compliant Wattage 1= 1W 0= 10W

orDerinG inFormation

Vitreous Enamel Conformal Axial Terminal Wirewound, 5% Tolerance Std.