NEMA Terminal Blocks Note: All part numbers are RoHS Compliant. BUCHANAN Terminal Blocks Table of ContentsNEMA ETB Overview (Selector Chart) 240-243 Catalog Numbering Code 244 Miniature Blocks, 100 Series 245-248 Medium Duty, 900 Series/ERT Series (Radiation Resistant) 249-257 Heavy Duty, 200 Series 259-266 Heavy Duty, Phenolic, 200 Series 267-272 Intermediate Heavy Duty, 800 Series 273-276 Ultra Heavy Duty, 400 Series 277-279 Fuse & Switch 281-288 One-Piece Phenolic Blocks 289-292 Accessories 293 Technical Summary 294-295 UL 1059 Basic Voltage Rating 296 6 239 Catalog 1308389 Dimensions are in millimeters Dimensions are shown for USA: 1-800-522-6752 South America: 55-11-2103-6000 Revised 6-07 and inches unless otherwise reference purposes only. Canada: 1-905-470-4425 Hong Kong: 852-2735-1628 specified. Specifications subject Mexico: 01-800-733-8926 Japan: 81-44-844-8013 www.tycoelectronics.com to change. C. America: 52-55-1106-0803 UK: 8706-080-208Note: All part numbers are RoHS Compliant. BUCHANAN Terminal Blocks NEMA ETB Selector Chart High Density Series 100 Medium Duty Series 900 High High High Medium Density Density Density Duty Miniature Single Tier Double Tier Direct Mount, Direct Mount Direct Mount, Channel only: Standard & Standard, Miniature Mounting Miniature Standard & Breakaway & Breakaway Channel Breakaway Channel Channels AWG Wire 30-12 30-12 30-12 22-8 22-8 10*, 22-14 22-10 Range Tubular Tubular Strap Plug-In Tubular Clamp Contact Types Clamp Screw Screw R=Shipped with screws raised B=Shipped with screws B B B B bottomed Ampacity 28A 28A 25A 30A 50A 35A*, 15A 30A 300 V 600 V Voltage 600 V 600 V 600 V 600 V 600 V 600 V (Limited Power Circuits) Center-to- .25 .25 .24 .375 .375 .375 .375 Center 6.35 6.35 6.10 9.53 9.53 9.53 9.53 Spacing Housing Nylon or Nylon Nylon PCT PCT PCT PCT Material Polypropylene Flammability UL94V-2 or UL94V-2 UL94V-2 UL94V-0 UL94V-0 UL94V-0 UL94V-0 Rating UL94V-0 Max. Service 125C (257F) or 125C (257F) 125C (257F) 150C (302F) 150C (302F) 150C (302F) 150C (302F) Temperature 105C (222F) 246 250 250 250 251 Pages *Acceptable for 35A max. factory wiring only when used with 10AWG wire preterminated with suitable ring tongue terminals. LR25557 E63810 240 Catalog 1308389 Dimensions are in millimeters Dimensions are shown for USA: 1-800-522-6752 South America: 55-11-2103-6000 Revised 6-07 and inches unless otherwise reference purposes only. Canada: 1-905-470-4425 Hong Kong: 852-2735-1628 specified. Specifications subject Mexico: 01-800-733-8926 Japan: 81-44-844-8013 www.tycoelectronics.com to change. C. America: 52-55-1106-0803 UK: 8706-080-208