BM20B(0.8)-40DS-0.4V(51) datasheet, PDF

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BM20B(0.8)-40DS-0.4V(51): DescriptionCONN RECEPT 40POS 0.4MM SMD; CategoryThe connector; File Size2MB，12 Pages; ManufacturerHirose Electric; Environmental Compliance

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BM20B(0.8)-40DS-0.4V(51) Overview

CONN RECEPT 40POS 0.4MM SMD

BM20B(0.8)-40DS-0.4V(51) Parametric

Parameter Name	Attribute value
Connector type	Socket with central contact
Number of pins	40
spacing	0.016"（0.40mm）
Number of rows	2
Installation type	surface mount
characteristic	Fixed solder tail
Contact plating	gold
Contact plating thickness	2.00µin（0.051µm）
Joint stack height	0.8mm
board height	0.031"（0.80mm）

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0.4 mm Pitch, 0.6 and 0.8 mm Height, Board-to-Board and Board-to-FPC Connectors

BM20 Series

■Receptacle

Existing products

BM20

2.3mm

2.98mm

2.46mm

10.4mm

10.48mm

A 22.3%

reduction

Existing products

in size!

BM20

2.98 ∞ 10.4

=About 31.0mm

2.3 ∞ 10.48

= About 24.1mm

BM20

■Header

Existing products

■Features

1. High density mounting capability

A space saving design that keeps the connector

compact, but still maintains an adequate vacuum

area (no less than 0.7mm wide).

Depth DS: 2.3 mm DP: 1.78 mm

9.32mm

9.4mm

Board occupied area

A 27.1%

reduction

Existing products

in size!

2. Reliable contact performance

Even though the mated height is low, the BM20 still

leads it class in maximum effective mating lengths

for each mating height.

Height 0.8 mm: 0.2 mm

Height 0.6 mm: 0.15 mm

The addition of the two point contact system adds

more reliability to the contacts.

BM20

2.46 ∞ 9.32

= About 22.9mm

1.78 ∞ 9.4

= About 16.7mm

Vaccum pick-up

3. No restrictions to PCB pattern design

for the 0.8 mm height connector

This series utilizes a thin wall to insulate the

bottom surface of the connector and maintains an

effective mating length of 0.2 mm. This removes

any restriction for PCB pattern layout design

under the connector.

Note *1: There are some restrictions for the 0.6

mm height style.

Mating diagram (cross section)

H=0.8

2-point contact

structure

Molded Bottom

surface structure

4. Enhanced mating operations

The structure uses guide ribs to ease the mating

process and offers a self alignment range of up to

0.3 mm. A clear tactile click is used as an

indicator to the user that the mating process was

completed.

5. Drop and shock resistant structure

Dimples were designed into the contacts to

increase their retention force and to absorb the

shock delivered from a drop or other impact.

6. Debris resisting design

When mated, the connector’s design covers the

contacts which help to keep dust and other debris

away from the contacts. The SMT leads are kept

very close to the connector housing which also

helps to prevent shorts caused by debris on the

exposed contacts

H=0.6

Molded Bottom

surface structure

In cases where the application will demand a high level of reliability, such as automotive,

please contact a company representative for further information.

1.78

2013.11②

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