ANSI ESD S20.20-2021 PDF

Full title and description

ANSI/ESD S20.20-2021 — ESD Association Standard for the Development of an Electrostatic Discharge Control Program for Protection of Electrical and Electronic Parts, Assemblies, and Equipment (Excluding Electrically Initiated Explosive Devices). The document provides administrative and technical requirements for establishing, implementing, and maintaining an ESD control program to protect electrostatic-discharge susceptible items.

Abstract

ANSI/ESD S20.20-2021 defines the structure and minimum technical limits of an ESD control program (training, product qualification, compliance verification, grounding/equipotential bonding, personnel grounding, ESD protected areas, packaging and marking). It addresses protection for items susceptible to ESD events at or above 100 V (HBM), 200 V (CDM) and includes a limit of 35 V for isolated conductors. The standard is intended as a multi‑industry baseline for manufacturing, handling, testing and transport of electronic parts and assemblies.

General information

• Status: Current (ANSI/ESD S20.20-2021 remains the active ANSI edition addressing ESD control program requirements).
• Publication date: Originally issued as the 2021 edition (cover date December 15, 2021); publisher listing notes an updated publication entry dated January 6, 2022 on the inside cover.
• Publisher: EOS/ESD Association, Inc. (ESD Association).
• ICS / categories: Electrical engineering / electrostatics classifications commonly mapped to ICS groups 17.220.99 and 29.020.
• Edition / version: ANSI/ESD S20.20-2021 (current ANSI edition, replaces the 2014 edition).
• Number of pages: Typical published electronic/hardcopy package runs approximately 28 pages (document length as distributed in common electronic editions/translations).

Scope

Applies to organizations that manufacture, process, assemble, install, package, label, service, test, inspect, transport or otherwise handle electrical/electronic parts, assemblies and equipment susceptible to damage by electrostatic discharge at or above the standard thresholds (100 V HBM; 200 V CDM) and addresses protection from isolated conductors by limiting voltages on those conductors to less than 35 V. It excludes electrically initiated explosive devices and does not replace electrical safety regulations. The standard sets both administrative program elements and technical limits for ESD control items and verification.

Key topics and requirements

• Establishment and documentation of an organizational ESD control program (policy, responsibilities, tailoring for site-specific conditions).
• Training and awareness for personnel who handle ESD susceptible items.
• Product qualification and defined sensitivity thresholds (HBM, CDM, isolated conductors).
• Compliance verification: periodic testing and recordkeeping for worksurfaces, flooring/footwear systems, wrist straps, ionizers and other ESD control items.
• Grounding and equipotential bonding system requirements (personnel grounding, grounding points, dedicated grounds).
• ESD Protected Area (EPA) definition and controls, including handling, packaging and marking of ESDS items.
• Tailoring guidance and companion documents (technical reports and STMs) referenced for test methods and verification procedures.

Typical use and users

Used by electronics OEMs, subcontract manufacturers, contract assemblers, test houses, quality and process engineers, ESD program managers, auditors and certification bodies to design, implement and audit ESD control programs across industries (electronics, telecommunications, aerospace, automotive, medical devices, defense supply chain, and other sectors handling sensitive components). Organizations also use the standard as the basis for facility certification and supplier requirements.

Related standards

ANSI/ESD S20.20-2021 is technically equivalent to IEC 61340-5-1 (the international electrostatics standard for protection of electronic devices). It references and is used with companion ESD Association documents such as ESD TR20.20 (handbook), ESD TR53 (compliance verification guidance) and numerous ESD STMs/STM test methods and product standards (for wrist straps, worksurfaces, flooring, footwear, packaging, ionization, etc.).

Keywords

ESD control, ESD protected area (EPA), electrostatic discharge, HBM, CDM, isolated conductor, grounding, equipotential bonding, wrist strap, worksurface, flooring, compliance verification, ESD program, ESDA.

FAQ

Q: What is this standard?

A: ANSI/ESD S20.20-2021 is the ESD Association’s American National Standard that specifies administrative and technical requirements for an organizational Electrostatic Discharge (ESD) control program to protect electronic parts, assemblies and equipment from ESD damage.

Q: What does it cover?

A: It covers program documentation, training, product qualification, compliance verification (periodic testing and records), grounding/equipotential bonding, personnel grounding systems, EPA controls, packaging/marking and tailoring guidance. It sets threshold values (100 V HBM, 200 V CDM, <35 V for isolated conductors) that guide the technical limits of controls.

Q: Who typically uses it?

A: Manufacturers, assemblers, test labs, quality engineers, ESD program managers, auditors and supply‑chain stakeholders who handle or specify protection for ESD susceptible electronic components and equipment.

Q: Is it current or superseded?

A: The ANSI/ESD S20.20-2021 edition is the active ANSI edition addressing ESD control program requirements (it replaced the 2014 edition). IEC 61340-5-1 has more recent international editions (the IEC 61340-5-1 family is maintained separately), and users should confirm which edition an individual procurement or certification requires.

Q: Is it part of a series?

A: Yes — S20.20 is the core ESD control program standard and is commonly used with a family of ESD Association STMs (standard test methods), technical reports (TR20.20 handbook, TR53 compliance verification guidance) and related product standards (wrist strap S1.1, worksurface STM4.1, flooring STM7.1, etc.).

Q: What are the key keywords?

A: ESD control, EPA, HBM, CDM, isolated conductor, grounding, compliance verification, training, product qualification.