What should the resistance value of an anti-static wrist strap be?
According to ANSI/ESD S1.1-2021 and IEC 61340-5-1, the resistance of an anti-static wrist strap should be less than 3.5 x 10E7 ohms. This ensures that the wrist strap effectively discharges human body charge to the ground without causing harm.
ANSI/ESD S20.20 explicitly states that all personnel must be connected to a grounding system or electrically when handling electrostatic sensitive equipment. The standard specifies that the impedance between the operator and the ground should be less than 35 megohms. However, wireless wrist straps lack a controlled high-impedance grounding path, which undermines the fundamental purpose of electrostatic discharge wrist straps-protecting workpieces from electrostatic discharge events. Therefore, using wireless wrist straps not only fails to provide the necessary controlled high-resistance grounding path to protect the workpiece but also fails to meet the compliance requirements of ANSI/ESD S20.20.