Holder/Base: Load Capacitance 8 pF to 32 pF

Component Specifications

Definition

A precision-engineered component designed to securely mount and electrically connect a quartz crystal resonator within an oscillator circuit. It provides mechanical stability, precise positioning, electrical contacts for signal transmission, and often includes thermal management features to maintain frequency stability. The holder/base ensures proper alignment between the crystal element and the oscillator circuit while protecting against vibration, shock, and environmental factors.

Working Principle

The holder/base mechanically secures the quartz crystal element while providing electrical connections between the crystal electrodes and the oscillator circuit. It maintains precise dimensional stability to ensure consistent resonant frequency by minimizing mechanical stress on the crystal. Thermal management features (when present) dissipate heat to maintain temperature stability, crucial for frequency accuracy. The design ensures minimal parasitic capacitance and inductance to preserve the crystal's electrical characteristics.

Materials

Typically made from high-temperature thermoplastics (PPS, LCP, PEEK) or ceramics (alumina, aluminum nitride) with metal contacts (nickel-plated brass, phosphor bronze, or beryllium copper). Insulation materials meet UL94 V-0 flammability rating. Lead-free plating compliant with RoHS directives.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Pin Count	2 or 4 contacts
Mounting Type	Through-hole or surface mount
Load Capacitance	8 pF to 32 pF
Holder Dimensions	Standardized to crystal package sizes (HC-49, HC-49S, etc.)
Contact Resistance	<50 mΩ
Insulation Resistance	>1 GΩ at 100VDC
Operating Temperature	-40°C to +125°C
Resonant Frequency Range	1 MHz to 200 MHz

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

IEC 60122-1, EIA-512, JIS C6701

Parent Products

This component is used in the following industrial products

Quartz Crystal Oscillator

A precision electronic component that generates a stable clock signal using the mechanical resonance of a vibrating quartz crystal.

View Product Details

Engineering Analysis

Risks & Mitigation

Mechanical stress causing frequency drift
Poor solder joints leading to intermittent connections
Thermal expansion mismatch damaging crystal
Contamination affecting electrical properties

FMEA Triads

Trigger: Excessive mechanical stress during assembly
Failure: Crystal fracture or frequency deviation
Mitigation: Use torque-controlled installation tools and stress-relief designs

Trigger: Thermal cycling beyond material limits
Failure: Contact fatigue or insulation breakdown
Mitigation: Select materials with matched thermal expansion coefficients

Trigger: Contamination from flux or handling
Failure: Increased contact resistance or short circuits
Mitigation: Implement cleanroom assembly procedures and protective coatings

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1mm dimensional tolerance for critical features, ±5% for electrical characteristics

Test Method

Visual inspection per IPC-A-610, electrical testing with LCR meters, thermal cycling per IEC 60068-2-14

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Holder/Base

Manufacturer profiles associated with Holder/Base.

Sourcing Holder/Base from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Serial Interface

Serial interface for industrial data transmission between IoT gateways and legacy equipment using RS-232/422/485 protocols.

Marking Ink

Specialized ink for permanent identification on surface mount resistors during manufacturing.

Dielectric Layer

Insulating layer in surface mount capacitors that stores electrical energy through polarization.

Optical Window

Transparent optical component for light transmission in polycarbonate lens housings

Frequently Asked Questions

What is the difference between through-hole and surface mount crystal holders?

Through-hole holders have pins that insert into PCB holes for soldering, providing stronger mechanical bonds. Surface mount holders have flat contacts for reflow soldering, enabling automated assembly and smaller footprints.

How does holder material affect oscillator performance?

Material properties impact thermal expansion, dielectric constant, and mechanical stability. Ceramic holders offer better thermal conductivity and stability, while plastic holders provide cost efficiency and adequate performance for most applications.

Can crystal holders be used interchangeably between different oscillator types?

No, holders are designed for specific crystal packages (HC-49, HC-49S, etc.) and mounting configurations. Using incorrect holders can cause frequency drift, poor connections, or mechanical damage.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Holder/Base