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Power Elements in Press-Fit Technology
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Power Elements in Press-Fit Technology - 2

Power Elements in Press-Fit Technology WURTH ELEKTRONIK

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Power Elements in Press-Fit Technology - 3

Press-Fit Technology 77 As a solder free fastening technology, press-fit technology frequently offers an attractive alternative to simple soldering technology. 77 An effective electrical press-fit connection is created by pressing a pin into the plated through hole of a circuit board and – as part of cold welding process – generating a gas-tight electrical connection. 77 The trough-hole plating for a press-fit system is essentially made in the same way as are the holes for accepting components for THT soldering. Thus there are no changes required in the pcb manufacturing process. 77 One...

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Power Elements in Press-Fit Technology - 4

Advantages of the Press-Fit Technology 77 Very high ampacity, ideally suited for high continuous and peak currents 77 Press-fit connections show extremely high environmental stability 77 Low-resistance connection (< 200 μΩ) means low self heating, hence less heat must be dissipated through the system 77 No heat development on sensitive components and no thermal stress of the circuit board 77 Extremely stable mechanical 77 No problems with cold solder joints 77 High mechanical retaining forces 77 Double-sided mounting of circuit boards is possible 77 Much higher long-term reliability as for...

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Power Elements in Press-Fit Technology - 5

Processing Press-fit system The processing of press-fit elements fits seamlessly into the production process and is thus very cost-effective. M ­ ultiple power elements can be fitted simultaneously using press-fit tools. Compared to soldering, the printed circuit boards are not subjected to thermal loads. 77 Other components should be spaced at least 4 mm away from the press-fit hole. 77 The hole should be at least 3 mm away from the edge. 77 No special tools are necessary for the pressing process. A simple lever press is usually sufficient. 77 The insertion force per pin should be at least...

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Power Elements in Press-Fit Technology - 6

Power Elements in Press-Fit Technology WURTH ELEKTRONIK

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Power Elements in Press-Fit Technology - 7

Bushes with two Rows Pin-Plate Characteristics 77 Drill hole diameter: 1.60 (–0.03) mm 77 Final hole diameter for HAL surface: 1.45 (±0.05) mm 77 Final hole diameter for chemical tin: 1.475 (±0.05) mm 77 Min. layer thickness of copper in the via: 25 µm 77 Max. layer thickness of tin in the via: 15 µm Dimensions (mm) Dimensions Power Elements Order Code Four corners a (mm) Pins b (mm) c (mm) d (mm) Format Type Type e 746 105 7 7 9.5 3.5 5 M3 6 A Bush 746 030 7 9 10.5 3.5 6 M4 8 B Bush 746 030 5 9 10.5 3.5 6 M5 8 B Bush 746 108 4 10 17 3.5 9 M6 8 B Bush 746 055 3 13 17 3.5 10 M8 10 C Bush 746...

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Power Elements in Press-Fit Technology - 8

Bushes with Pin-Plate Circumference Characteristics 77 Drill hole diameter: 1.60 (–0.03) mm 77 Final hole diameter for HAL surface: 1.45 (±0.05) mm 77 Final hole diameter for chemical tin: 1.475 (±0.05) mm 77 Min. layer thickness of copper in the via: 25 µm 77 Max. layer thickness of tin in the via: 15 µm Dimensions (mm) Dimensions Power Elements Order Code Four corners a (mm) b (mm) c (mm) e 746 114 8 7 9.5 3.5 746 108 6 9 9.5 3.5 746 040 8 9 9.5 746 109 0 16 746 106 0 16 Illustration of hole Pins Format Type Type M 2.5 8 E Bush M4 12 F Bush 3.5 M5 12 F Bush 17 3.5 M8 20 H Bush 21 3.5 M 10...

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Power Elements in Press-Fit Technology - 9

with full plain Pin-Plate ■ Drill hole diameter: 1.60 (-0.03) mm ■ Final hole diameter ■ Final hole diameter Min. layer thickness of copper Dimensions Threaded Hole

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Power Elements in Press-Fit Technology - 10

Shanks with full plain Pin-Plate Characteristics 77 Drill hole diameter: 1.60 (–0.03) mm 77 Final hole diameter for HAL surface: 1.45 (±0.05) mm 77 Final hole diameter for chemical tin: 1.475 (±0.05) mm 77 Min. layer thickness of copper in the via: 25 µm 77 Max. layer thickness of tin in the via: 15 µm Dimensions (mm) Dimensions Threaded Shank Power Elements Order Code Four corners a (mm) Pins b (mm) c (mm) d (mm) e Format Type Type 746 109 4 7 11 3.5 5 M3 9 I shank 746 109 6 7 12.5 3.5 6 M4 9 I shank shank 746 100 1 7 15.5 3.5 8 M5 9 I 746 138 3 9 16 3.5 8 M5 16 J shank 746 109 8 13 19 3.5...

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Power Elements in Press-Fit Technology - 13

Two Part Power Terminals with two Rows Pin-Plate, Base Element Characteristics Advantages 77 Drill hole diameter: 1.60 (–0.03) mm 77 Final hole diameter for HAL surface: 1.45 (±0.05) mm 77 Final hole diameter for chemical tin: 1.475 (±0.05) mm 77 Min. layer thickness of copper in the via: 25 µm 77 Max. layer thickness of tin in the via: 15 µm 77 Installation of power tracks possible 77 Max. rotation pressure per pin: 0.8 Nm 77 Almost no torqe transmission on pcb 77 Double secured against solving 77 Very low height 77 Flexible connection possibilities: threaded shank, threaded hole and...

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Power Elements in Press-Fit Technology - 15

Power Elements with flexible Pin Characteristics 77 Terminal: Material CuSn6 77 Surface: plated with 2 μm Sn 77 Square Nut: Material CuZn30Pb3 77 Surface: 2 μm Nickel, plated with 4 μm SnPD 77 Prepared hole diameter: 1.75 (+0.025/–0.025) mm 77 Final hole diameter: 1.6 (+0.09/–0.06) mm 77 PCB 1.6 mm–3.2 mm 77 Connection possibilities: bolt, spade or ring Nut, terminal and soldered installation possible Dimensions 4 Thread M4 M5 Type Order Code Order Code Bow element with square nut and screw M4 747 600 45 747 600 50 Only bow element 747 220 15 747 220 20 Assembled with square nut 747 003 8...

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