BM40A Series
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0.4mm Pitch

BM40A Series

BM40A Series

The BM40A series consists of board-to-FPC connectors designed for high-reliability applications, such as automotive electronics requiring heat resistance up to 125°C. They support high-speed data transmission of up to 16 Gbps and comply with the PCIe 4.0 standard. A unique terminal design ensures high contact reliability and retention force, while a reinforcing rib structure absorbs impact stress to enhance overall robustness. Combining heat resistance, high-speed transmission, and reliability, these connectors are ideally suited for critical components in ADAS and autonomous driving systems, including front-facing cameras, rear/side-view cameras, millimeter-wave radar, and LiDAR.

Product Purpose:




●Smartwatch
 ●iPad ETablet
●Mac Computer
 ●Smart Set-Top Box TV App
 ●Earbuds / Pods
 ●SmartphoneiPhone






●Smart Speaker Pod
 ●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
Mating Pitch
 		0.4mm PCB Mounting Pitch 0.4mm
Number Of Cores

10, 12, 20, 24, 30, 34, 36, 40, 44, 48, 50, 60, 70, 80, 90, 100, 120 Cores

Terminal Plating Gold
Coating Thickness
 		0.1 μm Min. Electrical Transmission Specifications
 		USB2.0, USB3.0, USB3.1 Gen2, MIPI, SATA, PCIe, USB4.0 Gen.2
Transmission Speed (Representative Reference Value)
 		20.0 Gbps
 		Body Length (Pitch Direction)
Body Width (Longitudinal)
 		3.4mm Fitting Height
 		1.5, 2.0, 2.5, 3.0, 3.5, 4.0 mm
Rated Voltage (AC)
 		50 V Rated Voltage (DC)
 		50 V
Rated Current

0.3A/Contact

Withstand Voltage Rating
 		AC 250Vrms, 1min
Impedance Matching
Contact Impedance
 		Contact ：70 mΩMAX.

Anchor plate :20mΩMAX.

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
 		15000 PCS

Product Order Coding Rules:BM40A-XX-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
BM40A

Plug-Side Value + Receptacle-Side Value
Variable Stacking Height (1.5, 2.0, 2.5, 3.0, 3.5, 4.0 mm)

10, 12, 20, 24, 30, 34, 36, 40, 44,

48, 50, 60, 70, 80, 90, 100, 120 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/Peel)
(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
BM40A-120S-0.4W-RXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5mm
3.40
120
with
-55 ～ +85℃
20.0 Gbps
Female Connector / Receptacle / Socket
BM40A
BM40A-120S-0.4W-PXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5 mm
3.40
120
with
-55 ～ +85℃
20.0 Gbps
Male Connector
BM40A
BM40A-100S-0.4W-RXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5, 3.0mm
3.40
100
with
-55 ～ +85℃
20.0 Gbps
Female Connector / Receptacle / Socket
BM40A
BM40A-100S-0.4W-PXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5,3.0,mm
3.40
100
with
-55 ～ +85℃
20.0 Gbps
Male Connector
BM40A
BM40A-90S-0.4W-RXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5, 3.0, 4.0 mm
3.40
90
with
-55 ～ +85℃
20.0 Gbps
Female Connector / Receptacle / Socket
BM40A
BM40A-90S-0.4W-PXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5, 3.0, 4.0 mm
3.40
90
with
-55 ～ +85℃
20.0 Gbps
Male Connector
BM40A
BM40A-80S-0.4W-RXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5, 2.0, 3.0, 3.5, 4.0 mm
3.40
80
with
-55 ～ +85℃
20.0 Gbps
Female Connector / Receptacle / Socket
BM40A
BM40A-80S-0.4W-PXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5, 2.0,3.0, 3.5, 4.0 mm
3.40
80
with
-55 ～ +85℃
20.0 Gbps
Male Connector
BM40A
BM40A-70S-0.4W-RXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5, 2.0, 3.0mm
3.40
70
with
-55 ～ +85℃
20.0 Gbps
Female Connector / Receptacle / Socket
BM40A
BM40A-70S-0.4W-PXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5, 2.0, 3.0 mm
3.40
70
with
-55 ～ +85℃
20.0 Gbps
Male Connector
BM40A
BM40A-60S-0.4W-RXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5, 2.0, 2.5, 3.0, 3.5, 4.0 mm
3.40
60
with
-55 ～ +85℃
20.0 Gbps
Female Connector / Receptacle / Socket
BM40A
BM40A-60S-0.4W-PXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5, 2.0, 2.5, 3.0, 3.5, 4.0 mm
3.40
60
with
-55 ～ +85℃
20.0 Gbps
Male Connector
BM40A
BM40A-50S-0.4W-RXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5, 2.0, 2.5, 3.0, 3.5, 4.0 mm
3.40
50
with
-55 ～ +85℃
20.0 Gbps
Female Connector / Receptacle / Socket
BM40A
BM40A-50S-0.4W-PXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5, 2.0, 2.5, 3.0, 3.5, 4.0 mm
3.40
50
with
-55 ～ +85℃
20.0 Gbps
Male Connector
BM40A
BM40A-44S-0.4W-RXX
In Mass Production
0.40
Parallel Board-To-Board Mating
2.0,3.0mm
3.40
44
with
-55 ～ +85℃
20.0 Gbps
Female Connector / Receptacle / Socket
BM40A
BM40A-44S-0.4W-PXX
In Mass Production
0.40
Parallel Board-To-Board Mating
2.0, 3.0mm
3.40
44
with
-55 ～ +85℃
20.0 Gbps
Male Connector
BM40A
BM40A-30S-0.4W-RXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5, 2.0, 2.5, 3.0, 3.5mm
3.40
30
with
-55 ～ +85℃
20.0 Gbps
Female Connector / Receptacle / Socket
BM40A
BM40A-30S-0.4W-PXX
In Mass Production
0.40
Parallel Board-To-Board Mating
1.5, 2.0, 2.5, 3.0, 3.5mm
3.40
30
with
-55 ～ +85℃
20.0 Gbps
Male Connector
BM40A

Product Features

◆ 0.4mm Pitch, 1.5–4mm Stacking Height, 125°C Heat Resistance, Automotive-Grade Compliant, Board-To-FPC Connector
The space-saving design minimizes connector depth while ensuring the intake area does not interfere with installation. Minimum depth: 3.4 mm.
◆ The Product's Mating Height Has a Wide Variation Range
Despite the space-saving design, it offers mating height options of 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, and 4.0 mm.
◆ High Terminal Contact Reliability

Products with a 1.5 mm mating height feature an effective mating length of 0.45 mm, making them one of the types with the longest mating lengths. 

They provide satisfying tactile feedback (a distinct "click") to effectively prevent partial mating and incorporate a locking mechanism to 

prevent disconnection, even with low mating force.

◆ Rugged Structure With Shock-Absorbing Ribs
The ribs on the two connectors abut each other upon engagement, absorbing stress caused by impact.
◆ Product Assembly Fit And Self-Alignment
Since the guide ribs utilize the dead-zone space, the unidirectional self-alignment accuracy in both the X and Y directions is 0.33 mm.
◆ Compatible With High-Speed Signals And Noise
Shielded versions for high-speed signals and noise protection are also available, supporting USB4 Gen.2 (20 Gbps) transmission.
◆ 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 barrier layer that prevents flux and other spatter from adhering to the contact surfaces.
◆RoHS Compliant
In consideration of environmental concerns, substances prohibited by the RoHS Directive have not been used.

Plating Specifications

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