BM40B Series
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0.4mm Pitch

BM40B Series

The BM40B series (0.4mm pitch, 0.8mm stacking height, 2.5mm width) board-to-board connectors are designed for high-density mounting in compact devices such as smartphones. The contacts feature a vibration- and shock-resistant CAM dual-point contact design, while the plug incorporates a wiping mechanism to clear away foreign matter, ensuring high stability; additionally, a simple locking structure provides tactile feedback, delivering an excellent mating feel.

Product Purpose:




●Smartwatch
 ●iPad Tablet
●Mac Computer
 ●Smart Set-Top Box TV App
 ●Earbuds/Pods
 ●iPhone Smartphone






●Smart Speaker Pod
 ●UAV / Drone
 ●In-Vehicle Equipment ●Security Equipment
 ●AGV/AMR
 ●Motor Drive






●Variable Frequency Drive (VFD)
 ●Radar, LiDAR
 ●TCU/Gateway
 ●Industrial Camera
 ●CNCs/PLCs
 ●Endoscope






●Industrial Sensors
 ●Server
 ●MRI/CT
 ●Industrial Robots
 ●Motor
 ●Meter






●Car Charger
 ●HUD Head-Up Display
 ●IVI/Navigation
 ●Monitor
 ●Camera
 ●Multifunction Printer

Download:

Product Catalog Product Drawing 3D(igs/stp) Product Specifications Test Report(TR) Product Packaging Specifications RoHS Report

Product Specifications

Connector Shape Plug/Receptacle PCB Mounting Method
 		SMT
Chimeric Form
 		Stacking Contact Orientation Top Entry
Fitting Part Pitch
 		0.4mm PCB Mounting Pitch 0.4mm
Number Of Cores

10,12,14,16,20,

24,30,34,40,44,50,

54,60,64,70,80 Cores

Terminal Plating Gold
Coating Thickness
 		0.1 μm Min. Electrical Transmission Specifications
Transmission Speed (Reference Value)
Body Length (In The Direction Of The Pitch)
Body Width (Longitudinal)
 		2.5mm Fitting Height
 		0.8mm
Rated Voltage (AC)
 		60V Rated Voltage (DC)
 		60V
Rated Current

0.3A/Contact

Withstand Voltage Rating
 		AC 150Vrms, 1min
Impedance Matching
Contact Impedance
 		90mΩ Max.
Maximum Operating Temperature Range
 		85 ℃ Operating Temperature Range (Min.)
 		-55 ℃
Terminal Arrangement
 		Dual Row RoHS2 Yes
Product Suction Cap
 		No Product Suction Application Using Fire-Resistant Adhesive Tape. No
Pillar Of Product Positioning
 		No Mating Cycles
 		50
Locking Method
 		Auto I-Lock Anti-Hair Loss Function
 		Yes
Packaging Format
 		Emboss Package Quantity
 		5000 PCS

Product Order Coding Rules:BM40B-08-XXP/X-0.4V-805
①Series Name
 ②Stacking Height By Type (mm):
 ③Number Of Signal Terminals
 ④Connector Type
 ⑤Number Of Power Terminals
 ⑥Contact Spacing
 ⑦Terminal Shape
 ⑧Packaging Type
BM40B

Plug-Side Value + Socket-Side Value
Stacking Height Variation (0.8mm)

10,12,14,16,20,

24,30,34,40,44,50,

54,60,64,70,80 Cores


P: Dual-Row Plug
R: Dual-Row Socket

None 0.4mm
 V: Straight SMT

(800): Standard Product,
[⑧=05]: Embossed Packaging (5,000 Pieces/Reel)
[⑧=10]: Embossed Packaging (10,000 Pieces/Reel)
(895): Embossed Packaging (1,000 Pieces/reel) (For Prototypes)


Product Image
Order Number
Production Status
3D Data Download
Core Spacing [mm]
Connection Method
Fitting Height
Width [mm]
Number Of Cores
Metal Fittings
Operating Temperature Range
High-Speed Transmission
Product Shape
Product Series
BM40B-80S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
80
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-80S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
80
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-70S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
70
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-70S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
70
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-64S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
64
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-64S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
64
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-60S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
60
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-60S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
60
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-54S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
54
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-54S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
54
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-50S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
50
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-50S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
50
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-44S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
44
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-44S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
44
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-40S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
40
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-40S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
40
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-34S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
34
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-34S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
34
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-30S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
30
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-30S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
30
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-24S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
24
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-24S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
24
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-20S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
20
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-20S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
20
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-16S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
16
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-16S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
16
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-14S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
14
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-14S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
14
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-12S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
12
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-12S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
12
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B
BM40B-10S-0.4W-P08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
10
with
-55 ～ +85℃
Male Connector
BM40B
BM40B-10S-0.4W-R08
In Mass Production
0.40
Parallel Board-To-Board Mating
0.80
2.50
10
with
-55 ～ +85℃
Female Connector / Receptacle / Socket
BM40B

Product Features

◆ The locking mechanism upon engagement is a unique feature of our company; it offers a low-profile design and excellent tactile feedback, while also providing enhanced retention force during disconnection.
◆ The contacts feature a dual-point clamping design that is resistant to vibration and drops; the plug utilizes a TN-R mechanism to clear away solder spatter and PCB debris, ensuring high contact reliability.
◆ The mating mechanism utilizes the "FINE-LOCK" design. It combines a low-profile structure with excellent tactile feedback and provides enhanced retention force during unmating.
◆ There is no exposed metal on the back of the connector; the restricted routing area is minimal, allowing for greater flexibility in routing traces between the terminal pads. It is suitable for high-density mounting.
◆Structure To Prevent Weld Lifting
The socket features a raised nickel barrier, and the plug is of one-piece molded construction, preventing the risk of solder wicking during SMT soldering.
◆Splash-Resistant Structure
The contact areas on both connectors feature a protective barrier that prevents flux and other spatter from adhering to them.
◆RoHS Compliant
In consideration of environmental concerns, substances prohibited by the RoHS Directive have not been used.

Plating Specifications

Coding Contact Part End And Tail Auxiliary Steel Plate RoHS Directive
01+ Au Au Sn-Cu Correspond
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