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280 Series

280 Series
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Corrib® resistors are ideal for applications involving high currents at very low resistance values—as low as 0.1 Q for the 300 Watt unit. These large, heavy-duty 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. • 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. RESISTOR HARDWARE Part No. Res. Part No. Res. 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. 63Q for 300W version Tolerance ±10% (K) 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 Temperature ±400 ppm/°C coefficient Dielectric with- 1000 VAC measured from terminal to mounting standing voltage bracket Includes two each bracket, bolt, washers (centering, mica, lock) and nut. Note: Single unit mounting contains one each bolt and nut; two each all washers. Moun Part No. No. of Derat. Slotted Elongated Resistors % To calculate use the formula yP/R max. amps 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite

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Core and Terminal Selection for Made to Order Type Code Wattage Core Dimensions Core Ohms Term. Rating D: OD C: ID L: Length Dia. Min. Max. Type Coating Blank = Vitreous C = Centohm RoHS Compliant Series Wattage Tolerance Ohms C = Fixed K = 10% example: ORDERING INFORMATION See website for custom core info Series Wattage & Terminal Type Ohms Tolerance 230 = Adjustable Core Code See “Resistor Example: F= 1% 280 = Fixed See “Core and Terminals for R0200 = 0.02 Q H= 3% 480 = Silicone fixed Terminal Selection” Tubular...

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