Keep your SonicWall firewall platform available with the NSA 2700/TZ670/TZ570 FRU power supply. This factory replacement unit is designed for secondary power configurations, giving infrastructure teams a direct path to redundancy on supported appliances. In edge security environments, that extra layer matters: it reduces the impact of a power module failure and helps preserve traffic flow, VPN access, and policy enforcement. The unit is intended for installation inside the chassis, and the NSA 2700 requires installation for use. That makes it a practical choice for teams that want the right part on hand before a service event turns into downtime. As a FRU, it also fits the maintenance model used by enterprise operations groups that prefer replacing only the failed component rather than the entire appliance. For organizations standardizing on SonicWall, this PSU is the correct spare to keep in inventory. It supports the operational discipline that high-availability firewall deployments demand: known compatibility, controlled replacement, and less time exposed to a single power path. When the firewall is fronting business-critical traffic, the power supply should be treated as part of the resilience plan, not an afterthought.