280 Series Corrib® Fixed and Adjustable Vitreous Enamel Power Corrib® resistors are ideal for applications involving high currents at very low resistance values—as low as 0.1Ω for the 300 Watt unit. These large, heavyduty resistors are designed to withstand frequent start-stop cycles characteristic of motor starting, dynamic braking and other similar applications. Special order units are available to accommodate up to 1500 watts. Corribs® are manufactured with corrugated resistive wire. To accelerate cooling, the wire is securely fused to the ceramic core by the protective vitreous enamel coating to improve durability. Corrib resistors are hollow-core units which can be securely fastened to chassis surfaces with thru bolts and brackets. F e at u r e s • Also available in Centohm or Silicone coating. Consult Ohmite. • Ribbed construction aids in rapid cooling. • Designed for equipment requiring low resistance loads at low ohmic values and high current capacity. • Especially constructed for motor starting, dynamic braking, etc. • RoHS compliant product available. Add “E” suffix to part number to specify. characteristics Coating Lead free vitreous enamel except for extreme low resistance 35 watt models, and very large models (750 watts and up), which are supplied in Silicone Ceramic Core Tubular Ceramic Terminals Tinned lug with hole. RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu Adjustable Lug Supplied with adjustable 300 watt models. Part No. 1974-A or 1974-B Resistance Max. 63Ω for 300W version Tolerance ±10% (K) Resistor hardware Thru Bolts Mounting Brackets for Lugs for 300 Watt 300 Watt Corrib Adjustable Corrib Includes two each bracket, bolt, Part No. Res. Part No. washers (centering, mica, lock) and 1974-A 0.40 1974-B 1/16 wire 1/8 wire 0.50 nut. Note: Single unit mounting 0.63 contains one each bolt and nut; two 1.00 1.50 each all washers. Part No. No. of Slotted Elongated Resistors 6110-81/2 Moun. Derat. % 6126-P-81/2 1 100% - 6127-P-81/2 2 83% - 6128-P-81/2 3 80% - 6129-P-81/2 4 80% Power rating Based on 25°C free air rating Derating Linearly from 100% @ +25°C to 0% @ +400°C Overload 10 times rated wattage for 5 seconds 1.60 2.00 2.50 3.10 4.00 5.00 6.30 8.00 10.00 12.00 16.00 20.00 25.00 30.00 48.00 50.00 Res. 0.10 0.12 0.16 0.20 0.25 0.31 0.80 1.20 Temperature ±400 ppm/°C coefficient Dielectric withstanding voltage 1000 VAC measured from terminal to mounting bracket To calculate use the formula √P/R max. amps (continued) 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected] 115 280 Series Corrib® Fixed and Adjustable Vitreous Enamel Power dimensions C D L Core and Terminal Selection for Made to Order Type Free Air Wattage Rating D: OD Code for Term. Core Ohms Dia. Min. Max. Type Core Dimensions C: ID L: Length 1500 1000 750 380 2.50” (63.5mm) 1.75” (44.45mm) 20.0” (508.00mm) 15.0” (381.00mm) 12.0” (304.80mm) 6.0” (152.40mm) S S S S 0.56 0.41 0.31 0.13 358 258 198 78 45 550 500 400 1.625” (41.28mm) 1.125” (28.58mm) 11.75” (298.45mm) 10.50” (266.70mm) 8.5” (215.90mm) R R R 0.21 0.19 0.14 133 117 91 45 270 1.50” (38.10mm) 1.125” (28.58mm) 5.0” (127.00mm) Q 0.065 41 45 395 375 300 220 185 155 140 1.125” (28.58mm) 0.75” (19.05mm) 11.25” (285.75mm) 10.5” (266.70mm) 8.5” (215.90mm) 6.0” (152.40mm) 5.0” (127.00mm) 4.25” (107.95mm) 4.0” (101.6mm) P P P P P P P 0.14 0.13 0.099 0.063 0.05 0.038 0.04 87 80 63 39 30 25 20 45 Free Air Wattage Rating D: OD Core Dimensions C: ID L: Length Code for Core Ohms Dia. Min. Max. 315 215 190 150 125 1.00” (25.40mm) 0.625” (15.88mm) 10.0” (254.00mm) 7.0” (177.60mm) 6.0” (152.40mm) 5.0” (127.00mm) 4.0” (101.60mm) N N N N N 0.11 0.068 0.056 0.043 0.031 67 43 35 27 19 45 180 160 140 105 100 0.75” (19.05mm) 0.50” (12.70mm) 6.5” (165.10mm) 6.0” (152.40mm) 5.0” (127.00mm) 4.0” (101.60mm) 3.5” (88.90mm) M M M M M 0.031 0.038 0.028 0.020 0.021 29 26 20 14 11 45 135 110 90 35 0.563” (14.30mm) 0.313” (7.95mm) 6.0” (152.40mm) 5.0” (127.00mm) 4.0” (101.60mm) 2.0” (50.80mm) K K K K 0.028 21 0.029 16 0.021 12 0.0097 0.11 46 35 0.563” (14.30mm) 0.313” (7.95mm) 2.0” (50.80mm) K 0.12 40 o r d e r i n g i n f o r m at i o n Standard Coating Blank = Vitreous C = Centohm S = Silicone Made-to-order NOTE: Wattages above 750 watts come with silicone coating. 116 See website for custom core info RoHS Compliant Series Wattage Tolerance Ohms K = 10% example: C = Fixed 1R0 = 1Ω E = Adjustable 250 = 250Ω 1K0 = 1,000Ω 25K = 25,000Ω 25K5 = 25,500Ω Series Wattage & 230 = Adjustable Core Code 280 = Fixed See “Core and 480 = Silicone fixed Terminal Selection” 680 = Centohm fixed Terminal Type See “Resistor Terminals for Tubular Cores” Ohms Example: R0200 = 0.02 7 R2000 = 0.2 7 2R500 = 2.5 7 10R00 = 10 7 Standard part numbers for 280 series C300KR10E C300KR12E C300KR20E C300KR25E C300KR31E C300KR40E C300KR50E C300KR63E C300K1R0E C300K1R2E C300K1R6E Term. Type C300K2R0E C300K2R5E C300K3R1E C300K4R0E C300K5R0E C300K6R3E C300K8R0E C300K10RE C300K12RE C300K16RE C300K20RE E300K10RE E300K12RE E300K16RE E300K1R0E E300K1R6E E300K20RE E300K2R0E E300K2R5E E300K3R1E E300K4R0E E300K5R0E E300K6R3E E300K8R0E E300KR10E E300KR12E E300KR16E E300KR20E E300KR25E E300KR31E E300KR40E E300KR50E E300KR63E E300KR80E 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected] Tolerance F = 1% H = 3% J = 5% K = 10% (std.) 5.6 46