SJK: High-precision oscillators & filters for global tech industries.
sjk@q-crystal.com+86 755 8835 2869
Shenzhen Crystal Technology Industrial Co., Ltd. is a professional manufacturer of frequency control components based in Shenzhen, China. With a strong emphasis on Satisfaction quality, Just-in-time service, and Key-cost offering, our brand name SJK, represents our commitment to these principles.
Founded in 1989, SJK specializes in the manufacturing of crystal resonators and oscillators. With over 30,000 m² of advanced production facilities and 30 fully automated production lines, we ensure high efficiency and precision in every process.
We are certified with ISO 9001, 14001 & IATF16949 and our products comply with RoHS & REACH regulations, demonstrating our dedication to quality standards and environmental sustainability. With extensive experience in miniaturization, high precision, and low power consumption, our components are widely used across multiple industries.
1
Application
Our components are vital to the next generation of technology, serving key sectors including:
- Telecommunications & Computing: 5G/6G, Mobile Devices, Data Centers
- Automotive & Industrial AI: Smart Driving, Industrial Automation, Robotics
- Consumer & Medical Tech: Wearables, Healthcare Electronics, Smart Home Emerging Frontiers: Aerospace, Satellites, Drones, AR/VR
- Telecommunications & Computing: 5G/6G, Mobile Devices, Data Centers
- Automotive & Industrial AI: Smart Driving, Industrial Automation, Robotics
- Consumer & Medical Tech: Wearables, Healthcare Electronics, Smart Home Emerging Frontiers: Aerospace, Satellites, Drones, AR/VR
2
OEM&ODM
We provide comprehensive OEM services, including custom laser marking, private labeling, and tailored packaging to meet your specific brand requirements.
3
ESG
Our entire SJK crystal product line is RoHS compliant, featuring Pb-free metal packaging and REACH-exempt glass/plastic. This commitment is backed by our ISO 9001, 14001, 45001, and QC080000 certifications for quality and sustainable management.
Development History
1989
• Shenzhen Headquarters
• Yantai Factory
2006
• Obtained recognition as a Shenzhen High-Tech Enterprise in 2008.
• Relocated to Futian Tian'an Digital City in 2006.
2009
• Was recognized as one of the "Top 10 Promising Brand Enterprises in China's Component Industry" in 2010.
• In 2009, the company's products passed the REACH green compliance system.
2011
• Has been awarded the China Electronics Excellent Brand Award for 12 consecutive years since 2011.
2017
• Relocated to Bantian Tian'an Cloud Valley in 2017.
• Was recognized as a National High-Tech Enterprise in 2020.
2021
• 2022-Multi-Certifications & Innovation Accreditation
• 2021-Fujian Factory
2023
• Obtained the dual recognition as a National "Specialized, Refined, Distinctive, and Innovative" Little Giant Enterprise and a National High-Tech Enterprise in 2023.
2024-2025
• In 2024, our company's quartz crystal oscillator products became the first domestically to receive a carbon footprint certification certificate.
• Obtained the certification for the Weapon and Equipment Quality Management System in 2025.
1989
2006
2009-2010
2011
2017
2021
2023
2024-2025
Product advantages
Also available:
• Ultra-short lead time (2–3 days)
• Ultra-wide frequency programmable range
• Ultra-fast startup time (< 1 ms)
With extensive product availability, competitive pricing, and strong customization capabilities, SJK Crystal provides one-stop frequency component solutions, including crystal customization, technical support, and professional application guidance.
1
Traditional Crystals
With over 35 years of experience in crystal manufacturing, we have an independent and mature technical system, and a complete environmental protection traceability process, including waste and CO₂ emission management.
2
Microcrystals
Ultra-small 1.2 × 1.0 mm (1210) crystals are available, with a thickness of only 0.25–0.3 mm, making them highly suitable for wearable devices and high-density applications.
3
XO, TCXO and OCXO Oscillators
TCXO: 1.6 × 1.2 mm (1612), thickness 0.5 mm, temperature stability performance up to ±0.5 to ±0.1 ppm
XO: 1.2 × 1.0 mm (1210), thickness 0.5 mm, suitable for high-density module design
OCXO: 7050 package (7 × 5 mm), thickness 3.6 mm, stability up to 10 ppb, a highly accurate clock as stable and reliable as the tip of a finger.
XO: 1.2 × 1.0 mm (1210), thickness 0.5 mm, suitable for high-density module design
OCXO: 7050 package (7 × 5 mm), thickness 3.6 mm, stability up to 10 ppb, a highly accurate clock as stable and reliable as the tip of a finger.
4
MEMS (Self-developed)
MEMS oscillators feature outstanding shock and vibration resistance, making them particularly suitable for automotive and harsh environment applications.
We are certified with ISO 9001, 14001 & 45001 and our products comply with RoHS & REACH regulations, demonstrating our dedication to quality standards and environmental sustainability.
Get in touch with us
Just leave your email or phone number in the contact form so we can send you a free quote for our wide range of designs!
Founded in 1989, SJK specializes in the manufacturing of crystal resonators and oscillators. With extensive experience in miniaturization, high precision, and low power consumption, our components are widely used across multiple industries.
Useful Links
Contact Us
Tel: +86 755 8835 2869
Email: sjk@q-crystal.com
Add: 12/F, Building 3C, TianAn Cloud Park Phase 1, Bantian, Longgang District, Shenzhen, 518129, China