Precision Clamps and Heat Sink Assemblies Heat Sink SCR IGBT Assemblies Wakefield-Vette compression pack heat sink and clamp systems provide customers with the complete system solution for proper installation and heat dissipation for high-power compression pack semiconductors. These high-quality mounting clamp assemblies are the industry standard for mounting, compressing, and clamping press-pack SCR, thyristors, rectifiers, and other high power disc packaged devices. Devices of these styles are most commonly found in power distribution equipment, industrial controls, transportation systems, and power supply and conversion systems. A clamp system consists of a crossbar and a spring assembly. The crossbar is a steel bar with two threaded rods installed in it. The rods are generally knurled and cold rolled into the bar to ensure proper fit. The cross bar assembly is covered in an epoxy coating which acts as an electrical insulator to ensure the devices are properly grounded. The crossbar is installed through the center web of the heat sink and sits in a channel surrounded by fins needed for thermal performance. On the back of the heat sink, a puck style device is installed and then the spring assembly is installed in the threaded rods of the crossbar. By tightening the nuts on the spring assembly, a compression force is applied to the center of the puck. Each spring assembly has a force gauge integrated into it to ensure ease of assembly and consistency of force applied to the many devices used in a system. The cross bar assembly is available in various lengths to meet the various needs of the industry. All components for device mounting are available separately for all standard compression requirements from 800 lbs. to 16,000 lbs. www.wakefield-vette.comPRECISION CLAMP PRECISION CLAMP HEAT SINKS HEAT SINKS PRECISION COMPRESSION MOUNTING CLAMP SYSTEMS COMPRESSION MOUNTING CLAMP ASSEMBLIES FOR 130 SERIES SEMICONDUCTORS TO 2.25 IN. (57.2 MM) DIAMETER Wakefield-Vette Engineering compression pack heat sinks and clamp systems provide electrical and industrial equipment manufacturers with complete system solutions for proper installation and heat dissipation for high-power compression pack semiconductor. All components for device mounting and cooling are available separately for all standard compression 130 SERIES SPRING ASSEMBLY requirements from 800 lbs (362.9 kg) to 16,000 lbs (7,257.5 kg) force in both natural and forced convection applications. NOTES: Model No. of Z Dim. Max Force Weight No. Leaves in. (mm) lb. (kg) lbs. (gms) 1. Spring assemblies are stainless steel leaves with a force Clamp Assembly Maximum Clamping Force Maximum Diameter (Ref) Crossbar Stud Centerline indicator gauge, except the lowest cost Type 130-1 spring 130-1 2 0.90 (22.9) 2,000 (907.2) 0.331 (150.14) Series Force Range Power Disc Device to Centerline Dimension assembly manufactured from automotive grade stainless 130-2 2 0.50 (12.7) 800 (362.8) 0.19 (86.18) steel. 130 Series 800 lbs (362.9 kg) - 2,000 lbs (907.2 kg) 2.25 in. (57.2 mm) 2.750 in. (69.9 mm) Ref 130-3 3 0.61 (15.5) 1,200 (544.3) 0.219 (99.34) 139 Series 3,000 lbs (1,360.8 kg) and 5,000 lbs (2,268.0 kg) 3.50 in. (88.9 mm) 4.000 in. (101.6 mm) Ref 130-4 4 0.72 (18.3) 1,600 (727.8) 0.333 (151.05) Order Guide: Dimensions: 143 Series 1,000 lbs (453.6 kg) - 6,000 lbs (2,721.6 kg) 3.50 in. (88.9 mm) 4.000 in. (101.6 mm) Ref 130-5 5 0.83 (21.1) 2,000 (907.2) 0.408 (185.07) Order Crossbar and Spring Assembly in. (mm) 144 Series 1,000 lbs (453.6 kg) - 6,000 lbs (2,721.6 kg) 4.00 in. (101.6 mm) 4.625 in. (117.5 mm) Ref separately by type number from table. lb. (kg) 145 Series 2,000 lbs (907.2 kg) - 10,000 lbs (4,535.9 kg) 4.50 in. (114.3 mm) 5.500 in. (139.7 mm) Ref 146 Series 8,000 lbs (3,628.8 kg) - 16,000 lbs (7,257.5 kg) 5.25 in. (133.4 mm) 6.000 in. (152.4 mm) Ref 131/132/133 Series High-Performance Press Pack Heat Sinks COMPRESSION MOUNTING CLAMP ASSEMBLIES FOR These high-quality mounting clamp assemblies are the Max SCR DIA Clamp Series Force Range Extrusion Profile 139 SERIES SEMICONDUCTORS TO 3.50 IN. (88.9 MM) DIAMETER worldwide standard for mounting, compression, and clamping 101.6 mm ALL 800 - 16000 LBS XX7151 press-pack SCR, thyristor, rectifier, and other high power disc 84 mm ALL 800 - 16000 LBS XX6351 packaged devices utilized in power distribution equipment, 139 SERIES CROSSBAR 63 mm ALL 800 - 16000 LBS XX5735 industrial controls, transportation systems, and power supply 3,000 lb - 5,000 lb, (1,360.8 kg - 2,268.0 kg), Crossbar Device Mounting, Surface to Spring Assembly, Top Surface Dimension 144 800 - 6000 LBS XX5360 and conversion systems. 139-3 SERIES CROSSBAR - 3,000 LB (1,360.8) 139-5 SERIES CROSSBAR - 5,000 LB (2,268.0) 143 800 - 6000 LBS XX10239 144 800 - 6000 LBS O16235 X Dimension X Dimension Clamp assemblies will accommodate devices with overall 144 800 - 6000 LBS O14442 Model Min Max Weight Model Min Max Weight case diameters to 5.25 in. (133.4 mm) maximum. Vertical 143 800 - 6000 LBS XX3529 No. in. (mm) in. (mm) lbs. (grams) No. in. (mm) in. (mm) lbs. (grams) 143 800 - 6000 LBS XX5730 device mounting space available for assemblies is determined 139-3A 1.52 (38.6) 1.89 (48.0) 0.689 (312.52) 139-5A 1.52 (38.6) 1.89 (48.0) 0.94 (426.38) 143 800 - 6000 LBS O14191 by selecting an appropriate series crossbar by length 139-3B 1.83 (46.5) 2.21 (56.1) 0.7 (317.51) 139-5B 1.83 (46.5) 2.21 (56.1) 0.96 (435.45) 143 800 - 6000 LBS XX3849 which, when a series spring assembly is selected (based on 139-3C 2.14 (54.4) 2.52 (64.0) 0.706 (320.24) 139-5C 2.14 (54.4) 2.52 (64.0) 0.98 (444.52) 50 mm 143 800 - 6000 LBS XX5733 maximum clamping force required), will provide the necessary 139-3D 2.45 (62.2) 2.83 (71.9) 0.721 (327.04) 139-5D 2.45 (62.2) 2.83 (71.9) 1.01 (458.13) 143 800 - 6000 LBS XX3559-2 139-3E 2.77 (70.4) 3.14 (79.8) 0.732 (332.03) 139-5E 2.77 (70.4) 3.14 (79.8) 1.02 (462.66) vertical clearance space. For the 130 and 139 Series, this 143 800 - 6000 LBS XX5736 determination is made by subtracting the chosen spring 139-3F 3.08 (78.2) 3.45 (87.6) 0.741(336.11) 139-5F 3.08 (78.2) 3.45 (87.6) 1.033 (468.56) 143 800 - 6000 LBS XX3561-2 assembly Z dimension (refer to dimensional tables) from the 139-3G 3.39 (86.1) 3.77 (95.8) 0.762 (345.64) 139-5G 3.39(86.1) 3.77 (95.8) 1.053 (477.63) 143 800 - 6000 LBS XX5732 139-3H 3.70 (94.0) 4.08 (103.6) 0.773 (350.63) 139-5H 3.70 (94.0) 4.08 (103.6) 1.074 (487.64) crossbar assembly X dimension minimum and maximum 143 800 - 6000 LBS XX5731 130-3J 4.01 (101.9 4.39 (111.5) 0.784 (355.62) 139-5J 4.33 (101.9) 4.39 (111.5) 1.064 (482.62) 143 800 - 6000 LBS XX3560-2 values, to calculate the available device mounting space 139-3K 4.33 (110.0) 4.70 (119.4) 0.79 (358.34) 139-5K 4.33 (110.0) 4.70 (119.4) 1.075 (487.61) 143 800 - 6000 LBS O13450 clearance for the particular assembly combination. Spring 143 800 - 6000 LBS XX4554 139-3L 4.64 (117.9) 5.01 (127.3) 0.793 (359.70) 139-5L 4.64 (117.9) 5.01 (127.3) 1.088 (493.51) assembly Z dimension is the dimension measured from 143 800 - 6000 LBS XX5331 139-3M 4.95 (125.7) 5.33 (135.4) 0.796 (361.06) 139-5M 4.95 (125.7) 5.33 (135.4) 1.102 (499.86) the spring assembly device mounting surface to the spring 143 800 - 6000 LBS OO3537 139-3N 5.26 (133.6) 5.64 (143.3) 0.832 (377.39) 139-5N 5.26 (133.6) 5.64 (143.3) 1.11 (503.49) assembly top surface. Some series have fixed dimensions for 143 800 - 6000 LBS XX5306 139-3P 5.57 (141.5) 5.95 (151.1) 0.838 (380.11) 139-5P 5.57 (141.5) 5.95 (151.1) 1.171 (531.16) alpha characters. All spring assemblies are designed with a 40 mm 143 800 - 6000 LBS O14779 force indicator gauge. CROSSBAR HEIGHT AND WIDTH 139 SERIES SPRING ASSEMBLY Series Height A Reference Width B Model Number of Z Dimension Maximum Force Number Leaves in. (mm) lb. (kg) Number in. (mm) Reference in. (mm) COMPRESSION MOUNTING CLAMP ASSEMBLIES FOR 139-1 1 0.87(22.1) 3,000 (1,360.8) 139-3 0.72 (18.3) 0.95 (24.1) 139-5 1.02 (25.9) 0.83 (21.1) 139-2 2 1.25(31.8) 5,000 (2,268.0) 130 SERIES SEMICONDUCTORS TO 2.25 IN. (57.2 MM) DIAMETER Order Guide: Dimensions: MECHANICAL DIMENSIONS MECHANICAL DIMENSIONS Order Crossbar and Spring Assembly in. (mm) 130 SERIES CROSSBAR separately by type number from table. lb. (kg) 800 lb - 2,000 lb (362.8 kg - 907.2 kg) Crossbar Device Mounting, Surface to Spring Assembly Top Surface Dimension X Dimension Model Min. Max. Weight No. in. (mm) in. (mm) lbs. (grams) 130-A 1.74 (44.2) 2.12 (53.8) 0.4 (181.44) 130-B 2.05 (52.1) 2.43 (61.7) 0.418 (189.60) 130-C 2.36 (59.9) 2.74 (69.6) 0.427 (193.68) 130-D 2.67 (67.8) 3.05 (77.5) 0.437 (198.22) 130-E 2.98 (75.7) 3.36 (85.3) 0.447 (202.76) 130-F 3.29 (83.6) 3.67 (93.2) 0.461 (209.11) 130-G 3.60 (91.4) 3.98 (101.1) 0.476 (215.91) 130-H 3.91 (99.3) 4.29 (109.0) 0.486 (220.45) 130-J 4.22 (107.2) 4.60 (116.8) 0.497 (225.44) 130-K 4.53 (115.1) 4.91 (124.7) 0.51 (231.33) 130-L 4.34 (122.9) 5.22 (132.6) 0.52 (235.87) 130-M 5.15 (130.8) 5.53 (140.5) 0.534 (242.22) 130-N 5.46 (138.7) 5.84 (147.3) 0.544 (246.75) 130-P 5.77 (146.6) 6.15 (156.2) 0.559 (253.56) Dimensions: in. (mm) Dimensions: in. (mm) 116 117