Protect PA-3400 deployments with a 450 W spare AC power supply designed to restore power capacity quickly when a field replacement is needed. In security infrastructure, power redundancy is not optional — it is what keeps inspection, policy enforcement, and connectivity available when hardware issues occur. This spare unit is intended for organizations that standardize on Palo Alto Networks appliances and want a direct replacement path instead of improvising with generic components. Matching the platform’s power requirements helps simplify maintenance planning, reduce recovery time, and keep spare inventory aligned with the installed base. For teams supporting branch, campus, or data center security stacks, a verified spare power supply is a practical way to protect uptime and avoid extended service windows. It is a small part with an outsized role: when the primary supply fails, the right replacement keeps the appliance in service and the network protected.