A Practical Guide to ESD Control and ANSI/ESD S20.20 Adherence

Electrostatic discharge (ESD) can silently damage electronic components, resulting in significant costs to companies, including lost time, resources, and damage to their reputations. That’s why well-established ESD handling procedures and up-to-date training are vital across all levels of an electronics operation. PAC experts are here to help outline the best practices for handling ESD-sensitive items (ESDS), highlight updates to the ANSI/ESD S20.20 standards, and identify five common mistakes that may be weakening your ESD control program.

Implementing Effective ESD Training Programs

Every person handling ESDS, from technicians to purchasing teams, must undergo ESD control training. This training should:

• Occur at least annually
• Include objective evidence of understanding
• Cover key concepts like electrostatic charge and discharge, grounding, and EPA procedures

ANSI/ESD S20.20-2021 requires a written ESD control program that outlines technical requirements, training plans, compliance verification procedures, and defined roles for personnel.

Avoid This Mistake: Inadequate Grounding Protocol

Assuming one grounding method works for every workstation can be costly. Ensure your grounding approach matches the needs of your environment.

Identifying and Labeling ESD-Sensitive Items

Clear labeling ensures that ESDS are treated properly throughout their lifecycle. Use the ESD susceptibility symbol to mark:

• Components
• Assemblies
• Finished products

Suppliers should identify ESDS before opening packaging. Unless your company assumes all electronics are ESD-sensitive, clear identification is critical.

Properly Establishing and Managing EPAs

An ESD Protected Area (EPA) is a designated zone where unprotected ESDS can be safely handled and stored. EPAs can range in size from a single workstation to a facility. Key requirements include:

• Clear visual indicators (floor tape, signage)
• Limited access to trained or escorted personnel
• Grounded surfaces and equipment

Read More: ESD Access Control: The Key to Protecting Your EPA

Avoid This Mistake: Insufficient EPA Integrity

EPAs lacking clear signage or proper zoning leave components vulnerable to unnoticed electrostatic damage.

Grounding Personnel and Equipment

Everyone and everything inside the EPA must be grounded. This is typically achieved through:

• Wrist straps with continuous or daily testing
• ESD footwear paired with compliant flooring
• Ground cords connected to a common point ground (CPG)

All equipment must be tested for proper grounding, including soldering irons, testers, and ionizers.

Avoid This Mistake: Compromised Component Storage Practices

Storing sensitive parts in non-compliant containers can generate static charges. Always use dissipative or shielded storage options.

Managing Insulators and Using Ionization

Insulators, such as plastic tools or personal items, cannot be grounded and pose a risk in EPA areas. Best practices include:

• Replacing insulators with dissipative or conductive materials
• Neutralizing essential insulators with ionizers
• Using topical antistats when alternatives aren’t possible

Static-generating items such as tapes should be used only with ionization directed at the workspace.

Safe Storage, Packaging, and Transport

Inside the EPA, ESDS should be stored on grounded shelves and moved on grounded carts. Outside the EPA, components must be fully enclosed in shielding materials:

• Metalized shielding bags
• Conductive/dissipative totes with lids

Before reuse, all packaging should be inspected for holes, cracks, or tears.

Avoid These Mistakes: Unprotected Transit of Sensitive Components

Unprotected Transit of Sensitive Components — Moving ESDS between areas without shielding invites cumulative ESD damage. Always transport with appropriate safeguards.

Unsuitable Packaging of ESD-Sensitive Items — Improper or damaged packaging can render all other ESD protection efforts ineffective. Match packaging to product sensitivity levels.

Sustaining ESD Compliance Through Testing and Best Practices

To keep your ESD control program effective and ANSI/ESD S20.20-2021 compliant, regular verification and day-to-day discipline are critical. Below are the essential testing protocols, operational best practices, and a handy checklist for ongoing compliance.

Verification and Testing Protocols

A strong ESD plan must include a clear schedule for checking the integrity of control measures:

• Wrist Straps: Test daily or use continuous monitors during work shifts.
• Footwear: Verify each time personnel enter the EPA.
• Ionizers: Check performance regularly with ionization testers.
• Equipment: Calibrate wrist strap testers, charge plates, and other devices as recommended.

Documentation: Maintain accurate logs of all testing and verification. Address any failed tests promptly under the supervision of a qualified professional.

Best Practices for Day-to-Day Integrity

• ESD Garments: Smocks should be fully fastened and cover all layers of clothing.
• Seated Work: Wrist straps are mandatory; footwear alone does not provide sufficient protection while sitting.
• Personal Items: Keep food, drinks, and other non-essential items out of the EPA.
• Rejected Components: Even non-functional parts must remain protected until disposition or rework is complete.

Quick ESD Compliance Checklist:

• Handle all ESDS devices only within grounded EPA environments
• Limit EPA access to trained personnel only
• Ground all personnel, tools, and work surfaces
• Test wrist straps and footwear daily (or monitor continuously)
• Use only ESD-compliant materials for storage, handling, and transport
• Label sensitive items and EPA zones clearly
• Eliminate or neutralize insulators where possible
• Keep all ESD equipment properly maintained and verified

Need Help Strengthening Your ESD Control Program?

PAC offers a comprehensive range of ESD-safe solutions, including flooring, workstations, garments, test equipment, ionizers, and packaging materials. Whether you’re establishing a new EPA or auditing an existing one, our ESD experts are here to help.