Smiths Connectors MHD/MDD/MDP CONNECTOR SERIES PCB High Density Connectors

Termination method:

10: 90 ° bend insertion, PCB thickness 1.60

30: Direct insertion, PCB thickness 2.40

44: SMT (non aligned), PCB thickness 3.80

96: Direct insertion, PCB thickness 4.50

Guidance method: refer to the guidance section for details

2.3 Module Configuration and Insertion Stage

The MHD series supports multiple single row or multi row module configurations, including 052, 5HA, 100, 1HB, 200 and other contact quantities. The product catalog provides a detailed "module configuration" view (Mating Side Views), showing the layout positions of signal and power contacts in the socket end view.

Standard plug-in stage

The maximum allowable radial offset during the process of plug and socket insertion is 0.15 mm (in all directions).

Multiple mounting examples are provided to guide engineers on how to achieve floating installation in a chassis or backplane to compensate for mechanical tolerances.

2.4 Detailed explanation of termination methods

The MHD series supports multiple termination styles to adapt to different PCB thicknesses and application scenarios:

Receptacle end

Through-hole soldering -90 °: reference number 10 (PCB 1.44-1.76mm, A=3.25+0.45, B ≤ 6mm); Reference number 11 (PCB 1.98-2.42mm)

Through hole welding - straight type: reference number 30 (PCB 2.16-2.64mm, A=3.5-4.0mm); Reference number 31 (PCB 2.88-5.50mm)

Surface mount technology (SMT): Reference number 41 (PCB 1.44-1.76mm, A ≤ 5.20mm); Reference number 42 (PCB 2.88-3.52mm); Reference number 43 (PCB 2.16-2.64mm); Reference number 44 (PCB 3.60-4.00mm); Reference number 45/47 (special thickness)

Plug end

Through-hole soldering -90 °: reference number 10 (PCB 1.44-1.76mm, A ≤ 5.95mm); Reference number 12 (PCB 2.88-3.52mm)

Through hole welding - straight type: reference number 30/31, size corresponds to socket end

Surface mount: Reference numbers 41-47, supports both center and non center PCBs

All termination methods provide an "Unbuild up of tolerances" diagram to help designers plan PCB pads and apertures reasonably.

2.5 External dimensions of connectors

The product catalog provides complete external dimension drawings from 52 core to 200 core, including:

View mating side of plug and socket

Theoretical dimensions annotation

The configuration of the terminal side contact should refer to the details of the board preparation

For example, the external dimension drawing of a 200 core socket clearly indicates the 2XA size, flange installation hole position, and guide part position, which facilitates mechanical structure design.

2.6 Guiding device

The MHD series provides multiple guidance methods to ensure that the plug and socket are correctly aligned in blind insertion or high-density environments:

Polarization mother guide (vertical installation): length 5.50 mm, single set mass 0.65g (P/N: 121122, etc.)

Polarized male guide (installed vertically or horizontally): such as P/N: 110111

Non polarized guiding element: such as P/N: 125126

Fully polarized guiding element: such as P/N: 130131133134

Special guide for power supply or high current contact: P/N: 190191

The guide element can be mixed with the contact element for installation, and some models can have a single set weight of up to 1.50g (such as P/N: 124), providing stronger centering force.

2.7 Board Preparation Details

For configurations with different numbers of contacts (052, 5HA, 100, 1HB, 200), the catalog provides detailed drilling layouts, including:

Direct termination: the position, diameter, and pad size of the through-hole between the socket and the plug

90 ° termination: through-hole offset and solder mask design for bent insertion structure

Surface mount end connections: SMT pad shape, spacing, and steel mesh opening recommendations

Important reminder: For non-standard module configurations, please contact the technical department for exclusive drilling layouts. But the typical layout provided by the directory can be used by engineers for preliminary mixed configuration design.

2.8 Power Supply and High Frequency Contact Parts

The MHD series supports special contacts that comply with the NFC 93569 standard, suitable for power and high-frequency signal transmission.

Power Contacts

90 ° End Connection: Male P/N 020 085 1-10R OG, Female P/N 020 084 2-10R G1

Straight end connection: Male P/N 020 087 1-30R OG, Female P/N 020 056 2-30R G1

Welding cup end connection: Male P/N 020 091 1-40R OG, Female P/N 020 060 2-40R G1

High Frequency Contacts

Supports multiple coaxial cables and installation methods:

Vertical installation, compatible with flexible cable Ø 1.9mm (RG 178 B/U or RG 196): KMX 3-M 081/KMX 3-F 081

Horizontal installation, compatible with flexible cables Ø 1.9mm: KMX 3-M 092/KMX 3-F 092 (compatible with motherboard thickness ≤ 3.2mm)

Vertical/horizontal installation, compatible with flexible cable Ø 2.5mm (RG 316): KMX 3-M 101/112 and corresponding female head

Vertical/horizontal installation, compatible with semi-rigid cable Ø 2.2mm (RG 405): KMX 3-M 131/142

Straight/90 °/SMT termination for direct PCB installation: KMX 3-M 041/032/172

Extraction tool

P/N: SD-03000CX003: Used for disassembling high-frequency or power contacts.