MC-1

Series M .5" (12.7mm) Center-to-Center Spacing Features: Dual Row ‡ Compact Modular Design for Low Power Circuits – Suitable for surface connection applications using channelassembled modular construction. ‡ All-Surface Mountability – Requires no additional insulation. Electro tin-coated steel mounting channel has two .196" diameter mounting holes. ‡ Thermo-Set Phenolic Barrier-Type Terminal Blocks – One thru 24 terminals on 1/2" center-to-center spacing. ‡ Broad Choice of Terminal Connections – Available in three screw designs and two .250" wide quick-connect variations offering up to four connections per terminal. ‡ Wire Sizes – M Series (No. 6-32 screw) is UL recognized for No. 22AWG to No. 14AWG. MA Series (No. 8-32 screw) is UL recognized for No. 22AWG to No. 12AWG. CSA requires lugs on wire larger than No. 14AWG for Series MA, and CSA requires lugs on No. 16AWG for Series M. ‡ Current/Voltage Rating – MA Series 25A/300V, M Series 15A/300V ‡ Recognition and Listing – Various terminal types are UL recognized and CSA certified. TERMINAL DESIGNATIONS 16-gauge (.051") brass terminal bar with two No. 8-32 plated steel screws per terminal accepting wire up to No. 12AWG *MAQ Four .250" x .032" brass quick-connect tabs per terminal accepting wire up to No. 12AWG *MALQ Two .250" x .032" brass quick-connect tabs and one No. 8-32 plated steel screw per terminal accepting wire up to No. 12AWG. Rated 25A/300V *M Brass terminal bar with two No. 6-32 plated steel screws per terminal accepting wire up to No. 14AWG *MC Brass terminal bar with two-piece No. 6-32 plated steel, capitvated clamp assemblies per terminal accepting wire up to No. 14AWG BARRIER STYLE *MA Series M Variations MA terminal bar with two No. 8-32 screws MAQ four .250" side quick-connects Recognized under the Components Program of Underwriters Laboratories, Inc. Standard 1059, Guide No. XCFR2, File No. E62557. Guide No. 22.2 No. 158, Report No. LR39186-1. MALQ two .250" wide quickconnects and one No. 8-32 screw M terminal bar with two No. 6-32 screws MC terminal bar with two captivated clamp assembles 34 www.curtisind.com Curtis Industries A Division of Powers Holdings, Inc. 6SHci¿cDtionssuEMHcttocKDnJH. Dimensions are shown for reference purposes only. 6SeFL¿FatLoQs: How to Order Center-to-Center Spacing: .5" (12.7mm) Wire Range: UL Recognized MA - No. 22AWG to 12 AWG M - No. 22 AWG to 14 AWG CSA: Must use lugs for wire larger than MA - 12 AWG M - 16 AWG No. of Terminals: 1 thru 24 Voltage Rating: CSA – 300V UL – 150V – General Industrial 250V – Commercial Appliance Tightening Torque: 12 in.-lbs. Current Rating: UL and CSA: 15A (M), 25A (MA) Housing: Material Phenolic Continuous Use Temp. (UL Index) 150°C (302°F) Flammability Rating 94V-0 Water Absorption (24 hrs. % wt. gain) .05% Chemical Resistance Resistant to most organic solvents Breakdown Voltage: Terminal - Terminal 7,400V Typ. Terminal - Ground 7,800V Typ. Note: Speci¿cations contained herein are subMect to change without notice. M Series terminal blocks are ordered by listing a composite number made up of the model designation followed by the number of poles required for the application. Example: Type M 10-pole block becomes stock number M-10. 1.125 (28.57) .196 Dia. Mtg. Hole (4.97) .328 (8.33) .937 (23.81) .187 (4.76) M.D. Metric (mm) Inches Metric (mm) 1 1.000 25.40 1.375 34.92 2 1.500 38.10 1.875 47.62 3 2.000 50.80 2.375 60.32 4 2.500 63.50 2.875 73.00 5 3.000 76.20 3.375 85.72 6 3.500 88.90 3.875 98.42 7 4.000 101.60 4.375 111.12 8 4.500 114.30 4.875 123.82 9 5.000 127.00 5.387 136.52 10 5.500 139.70 5.875 149.22 11 6.000 152.40 6.375 161.92 12 6.500 165.10 6.875 174.62 13 7.000 177.80 7.375 187.32 14 7.500 190.50 7.875 200.02 15 8.000 203.20 8.375 212.72 16 8.500 215.90 8.875 225.42 17 9.000 228.60 9.375 238.12 18 9.500 241.30 9.875 250.82 19 10.000 254.00 10.375 263.52 20 10.500 266.70 10.875 276.22 21 11.000 279.40 11.375 288.92 22 11.500 292.10 11.875 301.62 23 12.000 304.80 12.375 314.32 24 12.500 317.50 12.875 327.02 BARRIER STYLE O.D. Inches Overall Dimensions Dual Row Series M Dimensions Mounting Dimensions Number of Terminals Dimensions shown are ± 0.030" No. 6-32 Terminal Screw (M) No. 8-32 Terminal Screw (MA) NOTE: mm dim. are shown in parentheses Series M Accessories COVER Plain cover of 1/16” thick black bakelite with two mounting studs. Supplied loose for customer installation. JUMPER Brass Mumper rates at 25 amps. Part No. 258-A5 Dimensions are in inches and millimeters unless otherwise speci¿ed. Values in parentheses are metric equivalents. Curtis Industries A Division of Powers Holdings, Inc. 1-800-657-0853 35