21012D57R500JE OHMITE | Alldatasheet

Document overview

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Technical content

Features

  • Terminals suitable for soldering or bolt connection.
  • Adjustable lug supplied.
  • High wattage applications.
  • All-welded construction.
  • Rugged lead free vitreous enam- el coating.
  • Flame resistant coating.
  • Thumb-screw-adjustable lug available (Part No. 2160) for 1.125” core resistors.
  • RoHS compliant product avail- able. Add “E” suffix to part num- ber to specify. Dimensions (in. / mm) Core standard series Wattage Ohms L D C Code Voltage t erminal Other sizes available; contact Ohmite. Also available in low cost Centohm or Silicone coating; contact Ohmite. Terminals: Solder coated radial lug. RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu Adjustable terminal: Nickel plated steel. (Screwdriver type adjustable lug supplied standard. Other types, including silver con- tact units, available.) Derating: Linearly from 100% @ Electrical Tolerance: ±10% (K) Power rating: Based on 25°C free air rating. The stated watt- age rating applies only when the entire resistance is in the circuit. Setting the lug at an intermediate point reduces the wattage rat- ing by approximately the same proportion. Example: If the lug is set at half resistance, the watt- age is reduced by approximately one-half. Overload: 10 times rated wattage for 5 seconds. Temperature coefficient: ±260 ppm/°C Dielectric withstanding voltage: 1000 VAC: 12 to 100 watt rating.

3000 VAC: 175 and 225 watt rat-

ing (measured from terminal to mounting bracket) To calculate max. amps: use the formula √P/R. Power limitations for high resis- tance values: When resistance exceeds the resistance values listed below, derate the Power Rating by 25% to improve reliability: Power Resistance rating value 12W 4,500Ω 25W 9,000Ω 50W 20,000Ω 75W 35,000Ω 100W 50,000Ω No power derating necessary for ratings higher than 100W. See page 36 for mounting hardware Choose Ohmite’s 210 Type adjustable resistors for applications requiring settings at different resistance values. These wire- wound resistors are equipped with an adjustable lug, making them ideal for adjusting circuits, obtaining odd resistance values and setting equipment to meet various line voltages. 210 Type resistors feature a hollow core to permit secure fastening with spring-type clips or thru bolts with washers. They also offer the durability of lead free vitreous enamel coating and all-welded construction. Mounting brackets not included with resistors.

210 Series

Dividohm® Vitreous enamel adjustable Power Standard part numberS for 210 SerieS  = Standard values; check availability using the worldwide inventory search at www.ohmite.com 4,000 –––4K0E  6,000 –––6K0E  12,000 –––12KE Wattage Wattage Wattage Ohmic value D12K––– 12 D50K––– 50 D175K––– 175 Part No. Prefix  Suffix D225K––– 225 D500K––– 500 D1000K–––1000 D25K––– 25 D100K––– 100 D75K––– 75 Ohmic value D12K––– 12 D50K––– 50 D100K––– 100 D175K––– 175 Part No. Prefix  Suffix D225K––– 225 D500K––– 500 D1000K–––1000 D25K––– 25 D75K––– 75 Ohmic value D12K––– 12 D50K––– 50 D175K––– 175 Part No. Prefix  Suffix D225K––– 225 D25K––– 25 D100K––– 100 D75K––– 75 made-to-order See website for custom core and terminal info ordering info Tolerance J= 5% K= 10% Ohms 1R0 = 1 Ω 250 = 250 Ω 1K0 = 1,000 Ω 25K = 25,000 Ω 25K5 = 25,500 Ω RoHS Compliant Series Wattage Coating Blank =V itreous C= Centohm S= Silicone 50KΩ and 100KΩ resistance values involve very fine resistance wire and should not be used in critical applications without burn-in and/or thermal cycling. Tolerance J= 5% K= 10% Core Diameter See “Core and Terminal Selection” Ohms R500 = 0.500 Ω 1R00 = 1 Ω 250R = 250 Ω 1K00 = 1,000 Ω 25K0 = 25,000 Ω 25K5 = 25,500 Ω RoHS Compliant Coating 210 = Vitreous 410 = Silicone Ceramic 610 = Centohm Wattage Terminal Type See “Resistor Terminals for Tubular Cores” sPeCiFiCatiONs Adjustability is 10% to 90% of full value. Wattage is proportional to this adjusted resistance value. Material Coating: Lead free vitreous enamel. Core: Tubular ceramic.