Features and Strengths       Services Summary       Introdution of our services       Introduction of Manufacturing facilities       JOHNAN‛s MONOZUKURI      


We have various services, including technical solutions to customers’ requirement, based on high quality Japanese manufacturing philosophy "MONOZUKURI".

1. Features and strengths

・Since 2007 company foundation, JOHNAN SIAM has been running EMS business in Thailand and we provide from low volume high mix to high volume low mix production.

・It’s located in Chonburi Province, close to Thailand-s largest trading port Laem - Chabang Port , where the risk of flooding is low.

・JOHNAN SIAM owns L size PCBA equipment in all process, from Auto Insert, SMT, AOI to dip soldering.

・We Provide one-stop solutions from product concept design to component procurment, PCB assembly, final product assembly, and quality check.

・Wide range PCBA is available from 0402(mm) chip, majority is 0603(mm) actually, to large odd parts.

・JOHNAN SIAM owns N2 reflow oven with N2 generator (High Density PCBA and BGA are capable).

・3D AOI inspection machines are set in SMT line, which feedback mount failure immediately.

・JOHNAN SIAM proposes solutions of manufacturing problems to improve productivity and quality, such as VA and VE proposals.

・Propose inspection equipment (function tester) according to the customers specifications.

・ISO 9001/14001 was certified. JOHNAN SIAM provides same management quality/operation as our Japan side facility. We provide highly reliable products Complying with customer specifications.

2. Services Summary

■PCBA Assembly & Assembly


Printed Circuit Board Assembly (PCBA) our product ranges cover varieties of consumer home appliance, electronic products, and automotive products, (Air Conditions, Refrigerator, Rice Cooker, Television, Jarpot, etc. )

■Inspection and Pre-assembly services

Inspection and Pre-Assembly

JOHNAN SIAM provides hi-resolution inspection service (dimensions and appearance) for electronic parts and automotive parts.

■Packing / Shipping Services


JOHNAN SIAM handles packing design, manufacturing and shipping services, according to customer delivery styles. If you have any problems, please feel free to contact us.

3. Introdution of our services

Here are some introductions of our manufacturing related services, please feel free to contact us as we may be able to provide other services.

・Service details

    Consignment manufacturing and inspection of boards for consumer electronic appliances, home appliances, vehicles, and industrial equipment.

・PCBA base materials capability

    Ceramic substrate, Alminium substrate, FPC, High Multilayer PCB, Large size PCB, Paper Phenol PCB, etc.

・Type of solder

   Pb-free solder (with Ag) Pb-free solder (without Ag)

・SMD component capability

post img

   Minimum pin pitch: 0.3mm

    Mounting accuracy: +/-30um (with high-producing mode off)

    Minimum chip: 0402

    Chips: BGA, SOP, QFP, LED, QFN, etc.

    Size: Maximum work size: 360 mm x 410 mm;

    Board thickness: 0.5 mm to 1.6 mm (MAX: 5.0 mm)


    Axial insertion machine: ( 5.0 mm to 26.0 mm pitch)

    Radial insertion machine: (2.5mm, 5.0mm, 7.5mm pitch compatible)

    3D image inspection equipment.

    DIP Pot, automatic soldering Machine.

4.Introduction of Manufacturing facilities

    JOHNAN SIAM has manufacturing equipment to correspond customers request and needs, if you have any problems, please do not hesitate to contact us.

post img

・Equipment owned

Mounting machine 7lines
Jumper Inserter 1 machine
Axial Inserter 2 machines
Radial Inserter 3 machines
DIP Insertion 5 Lines
SPI Inspection 4 machines
AOI Inspection 7 machines
เครื่อง X-ray 1 machine
Other Pin board for ICT, Function Testing machines, etc.

■Material Warehouse
■SMT Process
Inspection and Pre-Assembly
■AOI Processing
Inspection and Pre-Assembly
■Auto-Insert (AI) Process
Inspection and Pre-Assembly
■DIP soldering to PCB completed assembly

Inspection and Pre-Assembly

■SMT Processing Line

Printing Machine

Printing Machine

3D Solder Paste Inspection (SPI)

3D Solder Paste Inspection (SPI)

High-Accuracy Mounter

High-Accuracy Mounter

N2 Reflow Oven

N2 Reflow Oven

3D AOI, Automated Optical Inspection (AOI)

3D AOI, Automated Optical Inspection (AOI)

■Introduction of Inpection machines

■3D Solder Paste Inspection (SPI)
3D Solder Paste Inspection (SPI)
■3D AOI, Automated Optical Inspection(AOI)
3D AOI, Automated Optical Inspection(AOI)
■X-ray inspection machine
X-ray inspection machine


    In order to provide high-value-added manufacturing to customers, we are actively engaged in various initiatives such as productivity and quality improvement at manufacturing sites, 5S activities, skill training and human development.