IEC 60384-22:2011

Overview

IEC 60384-22:2011 is an international standard published by the International Electrotechnical Commission (IEC) that specifies requirements for fixed surface mount multilayer ceramic capacitors (MLCCs) of dielectric Class 2. These are unencapsulated capacitors featuring metallized connecting pads or soldering strips designed for mounting on printed circuit boards (PCBs) or substrates in hybrid circuits. The standard excludes capacitors intended for electromagnetic interference suppression, which are covered under IEC 60384-14.

Its primary purpose is to define preferred ratings and characteristics, prescribe quality assessment procedures, tests, and measurement methods based on IEC 60384-1, and establish performance requirements for Class 2 ceramic MLCCs used in electronic equipment.

The 2011 edition introduces technical updates such as modified measuring frequencies, test voltages, lead-free soldering conditions, new test details for shear and substrate bending, and expanded dimension coding.

Keywords: IEC 60384-22, multilayer ceramic capacitors, Class 2 capacitors, surface mount capacitors, electronic equipment capacitors, capacitor testing, quality assessment, preferred ratings

Key Topics

• Scope and Object: Covers fixed unencapsulated surface mount MLCCs with ceramic dielectric Class 2; focuses on preferred characteristics, standardized testing, and quality assurance.
• Ratings and Characteristics: Defines preferred rated temperature, rated voltage, category voltage, nominal capacitance values, tolerances, and temperature coefficients of capacitance.
• Mounting and Marking: Specifies configurations for PCB mounting and marking requirements on component bodies and packaging to ensure traceability and compliance.
• Quality Assessment Procedures: Outlines procedures for qualification approval, primary manufacturing stage inspection, lot conformance, and ongoing quality control.
• Test and Measurement Methods: Includes electrical tests such as capacitance, loss angle, insulation resistance, voltage proof, impedance, and ESR, plus mechanical tests including shear and substrate bending.
• Environmental and Reliability Testing: Specifies tests for resistance to soldering heat, solderability under lead-free conditions, rapid temperature changes, damp heat (steady and cyclic), endurance, and robustness of terminations.
• Updates in Edition 2.0: Notable changes include lowering measuring frequency for 100 pF capacitors from 1 MHz to 1 kHz, adding higher test voltage options for voltages ≥1000 V, including substrate bending test parameters, and incorporating lead-free solder alloy considerations.

Applications

IEC 60384-22 capacitors are critical components in a wide range of electronic equipment where multilayer ceramic capacitors of Class 2 dielectric materials are required:

• Consumer Electronics: Mobile phones, tablets, laptops, and home appliances that require compact, reliable surface mount capacitors for filtering, decoupling, and timing circuits.
• Automotive Electronics: In-vehicle networks, sensors, and control systems needing capacitors that meet strict environmental and electrical performance standards.
• Industrial Equipment: Automation controllers, measurement instruments, and communication devices benefiting from capacitors with standardized quality and endurance properties.
• Hybrid Circuits and Printed Boards: Direct mounting of fixed surface mount MLCCs on substrates, supporting miniaturization and high-density assembly.
• Manufacturing and Quality Control: Provides manufacturers, component suppliers, and testing laboratories with clear guidelines for testing, rating selection, and performance verification to ensure product consistency and reliability.

Related Standards

• IEC 60384-1: General requirements and measuring methods for fixed capacitors.
• IEC 60384-14: Specifications for fixed capacitors used specifically in electromagnetic interference suppression.
• IEC 60068 Series: Environmental testing standards relevant for reliability testing of electronic components including capacitors.
• IEC 60286: Package handling standards for surface mount devices.
• IEC 60062: Marking codes for electronic components, which complements the marking requirements in IEC 60384-22.

By adhering to IEC 60384-22:2011, manufacturers and designers ensure they meet internationally recognized quality and performance criteria for Class 2 ceramic multilayer capacitors used in surface mount technology, supporting high reliability and compliance in modern electronics manufacturing.