SJK Crystal | Precision Crystal Resonators & Oscillators Manufacturer

About SJK Crystal

SJK Crystal is a leading manufacturer of high-precision crystal resonators, oscillators, and frequency control devices based in China. With years of engineering expertise, we deliver reliable timing solutions for a wide range of applications including telecommunications, IoT, automotive systems, industrial automation, and consumer electronics.

Our product portfolio includes 32.768kHz tuning fork crystals, SMD and through-hole crystal resonators, TCXO, VCXO, OCXO, differential oscillators, and RTC oscillators—all designed to meet stringent international standards.

ISO-Certified Manufacturing Process

Global Distribution & Fast EMS Shipping

Custom Frequency & Packaging Options

Our Product Range

From miniature SMD crystals to high-stability OCXOs, we offer a comprehensive lineup of frequency control components.

SMD 3215 32.768kHz

Series 7L | 3.2x1.5mm | 20ppm | 6-12.5pF

• Ultra-low power consumption
• Ideal for RTC applications
• AEC-Q200 compliant options

HC-49/U Crystal Unit

Series 6A | Through-hole | 20ppm

• Standard through-hole package
• Wide frequency range: 1–100MHz
• High reliability & shock resistance

27.000MHz Resonator

SMD 2016 | 10pF Load | 10ppm

• Compact 2.0x1.6mm size
• Stable over -40°C to +85°C
• Suitable for wireless modules

433.92MHz SAW Resonator

3.3mm Size | Wireless Comms

• Optimized for RF applications
• Low insertion loss
• High Q factor

Thru-Hole OCXO

Series 3X | 20x20mm | 20ppb

• Ultra-low phase noise
• ±20ppb frequency stability
• Telecom & base station grade

SMD 7050 VCXO

50.000MHz | LVPECL Output

• 7.0x5.0mm package
• Low jitter & high stability
• For PC and networking gear

SMD 3225 RTC Oscillator

Series 3C | 32.768kHz Output

• Integrated oscillator circuit
• No external components needed
• Low power CMOS output

SMD 3225 LVDS Oscillator

Series 3D | 156.25MHz

• Low skew differential output
• For high-speed SerDes
• EMI-reduced signaling

SMD 2016 TCXO

Series 7X | ±0.5ppm to ±2.5ppm

• Temperature-compensated
• Compact 2.0x1.6mm size
• GPS, IoT, and mobile use

HC-49U Crystal Filter

MCF Series | Narrow Bandpass

• High selectivity & rejection
• Stable center frequency
• For IF stages and radios

Why Choose SJK Crystal?

High Reliability

Our components undergo rigorous testing for temperature cycling, vibration, and long-term aging to ensure performance in harsh environments.

Fast Turnaround

Standard lead time of 2–4 weeks. Expedited options available. Global EMS shipping ensures fast delivery.

Custom Solutions

Need a specific frequency, stability, or package? We offer custom design and engineering support for OEMs and system integrators.

Frequently Asked Questions

What is the difference between a crystal resonator and an oscillator?

A crystal resonator is a passive component that requires an external oscillator circuit to generate a signal. An oscillator is an active device that includes the resonator and driving circuitry in one package, providing a ready-to-use clock signal.

Do you offer samples?

Yes, we provide free samples for qualified customers. Please contact us with your requirements and shipping details.

What is the lead time for custom parts?

Custom designs typically take 6–8 weeks, depending on complexity. We work closely with clients during prototyping and validation.

Are your products RoHS compliant?

Yes, all SJK Crystal products are fully RoHS and REACH compliant. Certificates of compliance are available upon request.

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Precision Crystal Resonators & Oscillators Manufacturer