Overview
IEC 60368-3:2010 is an international standard published by the International Electrotechnical Commission (IEC) that defines standard outlines and lead connections for piezoelectric filters of assessed quality. This part 3 of the IEC 60368 series focuses specifically on the outline drawings and lead enclosures for piezoelectric filters used in frequency control and selection devices. It provides uniform mechanical dimensions and leads configuration to ensure compatibility and interchangeability between components from different manufacturers.
This 2010 edition is the fourth revision of the standard and introduces key updates, including the deletion of four previously defined enclosure types and the formal listing of 16 standardized enclosure types, facilitating clearer specification and manufacturing consistency.
Key Topics
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Outline Drawings Standardization:
The standard mandates a precise format for outline drawings of piezoelectric filters, including:
- Dimension and geometric characteristics essential for mechanical interchangeability
- Use of third angle projection for all drawings
- Inclusion of detailed views where necessary
- Presentation of dimensions in millimeters with specified maximum, minimum, and nominal values depending on the measurement
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Lead Connections and Enclosure Types:
The document specifies guidance for lead (termination) dimensions, including cross-sectional size, length, and spacing, to accommodate various applications:
- Minimum and maximum dimensions for leads depending on whether they are for soldering or plug-in applications
- Identification of lead connections through an agreement between supplier and user, without embedding this info in the outline drawing itself
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Enclosure Types and Dimensions:
- The standard now recognizes 16 types of enclosures for piezoelectric filters, replacing the prior extended list by deleting types CF05, CF06, CF07, and CF09.
- Detailed tables provide the exact dimensions for each enclosure type, covering metal enclosures (soldered and welded), number of leads, and physical sizes.
- These enclosures are designed to house piezoelectric components reliably while ensuring standardized form factors.
Applications
IEC 60368-3:2010 is highly relevant for manufacturers, designers, and quality assurance teams involved with piezoelectric filters, especially in contexts where frequency control and frequency selection components are critical such as:
- Radio frequency (RF) circuits in telecommunications
- Oscillator circuits requiring precise frequency stability
- Signal filtering in electronic communication devices
- Industrial sensing and measurement systems relying on piezoelectric components
By adhering to this standard, organizations ensure consistent mechanical compatibility across suppliers, simplifying integration, reducing design errors, and accelerating development cycles.
Related Standards
- IEC 60368 Series: The overall series covers piezoelectric filters of assessed quality, including general requirements and performance tests beyond outlines and physical configurations.
- IEC Technical Committee 49 Publications: Broadly addressing piezoelectric, dielectric, and electrostatic devices used in frequency control and selection, complementary standards guide electrical characteristics, material properties, and testing methods.
- ISO/IEC Directives Part 2: This document follows the guidelines for preparing international standards, ensuring harmonization with global standardization protocols.
Keywords: IEC 60368-3, piezoelectric filter standard, piezoelectric filter outline, lead connections, frequency control devices, piezoelectric filter enclosures, electronic component standards, IEC standard piezoelectric filters, frequency selection filters, mechanical interchangeability, soldered filter enclosures, welded crystal filter, international electrotechnical commission.