Electrostatic discharge (ESD) safety: An ESD wrist strap is primarily designed to protect what during computer service—PC components, service technicians, or both?

Introduction / Context:
Electrostatic discharge (ESD) is a major cause of latent and catastrophic failures in semiconductor devices. An ESD wrist strap provides a controlled, safe path for charge to bleed to ground while you handle circuit boards. This item tests whether you know the main protection target of ESD controls during PC repair.

Given Data / Assumptions:

• The technician wears a grounded ESD wrist strap while handling printed circuit boards.
• Standard straps include a high-value series resistor (about 1 MΩ) for safety.
• The question asks what the strap is designed to protect, not what else it may incidentally benefit.

Concept / Approach:
The primary purpose of an ESD wrist strap is to protect sensitive electronic components (PC components) from static damage by equalizing potential between the technician and the device. While the strap's resistor also limits fault current to protect the person, the design goal in electronics work is component protection. Therefore, the best single answer is the protection of PC components.

Step-by-Step Solution:

Verification / Alternative check:
Manufacturer service guides and IPC/ESD standards emphasize component protection as the justification for ESD programs. Human safety is addressed by the series resistor but is not the core purpose statement.

Why Other Options Are Wrong:

• Service Technicians: The resistor improves safety, but the strap exists to protect electronics.
• All of the above: Overstates the design intent; primary goal is component protection.
• None of the above: Incorrect; components are protected.

Common Pitfalls:
Clipping to ungrounded metal, bypassing the resistor, or wearing the strap over insulating clothing defeats protection.

Final Answer:
PC Components