About Us

Established in 1984, NAKAGAWA Electronics Limited (NKG) is a privately-owned crystal components company based in Hong Kong focused on quartz crystals.

NKG achieved great success in their quartz crystal trading platform and in 1989 expanded by launching their first factory in Zhoushan Island. In the following years, additional frequency control products were introduced to broaden the line of products that could be offered.

In 2006 the manufacturing plant moved to Suzhou City, Jiangsu, and the decision was made to collaborate with other manufacturers in the quartz sector. This prescient decision resulted in cost-saving benefits that simultaneously reduced costs of production which could be passed on to the customer whilst also allowing for an expansion of the product line through co-investment into the latest technology and machinery.

From its inception in 1984 through to the present day, NKG has grown to become one of the most recognized and experienced manufacturers of frequency management products in the world. From simple tuning fork crystals to high stability oven-controlled crystal oscillators, NKG offers the most comprehensive line of frequency management devices in the industry

Quality Assurance

We are committed to delivering products that exceed the customer’s expectations by implementing the following system requirements:

Our Hong Kong HQ operates under ISO 9001 and 14000. Our manufacturing sites operate under advanced standards by utilizing additional systems such as TS 16949. We follow the aims of the electronic industry code of conduct (EICC – today by RBA). Manufacturing sites have passed corresponding EHS audits.

We are committed to the restricted use of conflict metals and routinely inspect our suppliers in order to verify non-use of restricted sources.

Engineering Support

Professional engineering personnel with over 30 years of experience in the field. Our engineering labs located are located in China and the USA. We offer advanced board testing capability for customer applications. These include:

  • Frequency matching test to ensure crystal works at the desired frequency
  • Determination of circuit’s negative resistance and circuit margin
  • Determination of drive level that oscillator provides for the crystal
  • On-site training for general introduction of frequency control components and board tests

Product Environmental Compliance

  • We offer RoHs compliant products since 2004, majority fully compliant
  • Exemption 7(a) for Pb contained in high melting point solder alloy, used in certain types of SMD tuning fork crystals and special high- end oscillators for telecom
  • Exception 7(c) for Pb contained in piezoelectric devices (used in ceramic resonators and filters) and in glass compound (used in glass seal SMD crystal)
  • Our products are halogen-free per IPC J-STD-709, verified since 2008
  • We are continuously monitoring for updates of REACH’s list of SVHC’s in order to ensure that all our products remain compliant
  • In 2008 we obtained confirmation that all our products be of PFOS/PFOA
  • None of our products use PVC or phthalates in plastic-like encapsulations
  • Our environmental compliance extends to packaging materials
  • In-hours XRF testing is mandatory at all our manufacturing sites

Our Factory

NKG manufactures its products across two separate sites. The traditional metal lines are produced in Suzhou while all-ceramic package production takes place at our Nanjing facility.

Manufacturing Plant One – Suzhou, Jiangsu Province
Production lines for traditional metal can quartz crystal units HC-49/S thru-hole and SMD, HC-49/U thru-hole and SMD, UM-1 and UM-5 types

  • Two large-scale manufacturing lines for metal can crystal units
  • Total capacity: 25KK/month
  • Automated manufacturing equipment reduces environmental exposure and labor costs
  • In-house XRF testing for heavy metals
  • ISO 9001 / 14001 certified and TS16949
  • QC080000 system implemented
  • In-house XRF testing


Manufacturing Plant Two – Nanjing, Jiangsu Province
Full-scale production lines for all sizes of ceramic SMD crystal, all-ceramic SMD oscillators, TCXO/VCTXCO/OCXO

  • Large size enterprise with mass manufacturing for all-ceramic package SMD crystal and oscillators including VCXO and TCXO
  • High-end product lines for OCXO
  • Total capacity: 100KK/month
  • State-of-the-art high tech manufacturing equipment
  • ISO 9001 / 14001 certified and TS16949
  • Implemented procedures to electronic industry code of conduct (EEICC) and passed several EHS audits
  • In-house XRF testing