Juniper EX4100/EX3400 150W AC PSU Front-to-Back | Enterprise Power

Maintain switch availability with a 150 W AC power supply built for Juniper EX4100 and EX3400 platforms. The front-to-back airflow orientation helps preserve the intended cooling path inside the chassis, which matters in dense rack environments where thermal consistency affects long-term reliability. This PSU is the right fit when you need a direct replacement that matches the platform’s power and airflow requirements instead of forcing a generic substitute. For infrastructure teams, that means fewer compatibility questions, cleaner service planning, and faster restoration when a supply needs to be swapped. At 150 W, this unit is sized for the supported switch family rather than oversized for the job, helping keep the power architecture aligned with the system design. It is a practical choice for maintaining uptime in access and aggregation layers where predictable operation is more valuable than excess capacity. Use it to restore service quickly, preserve airflow direction, and keep Juniper switching hardware running as intended.