Power Supply JUNIPER JPSU-150-AC-AFO 150W AC redundant, front-to-back airflow

The JUNIPER JPSU-150-AC-AFO is a 150W redundant AC power supply designed for compatible Juniper network switches, including EX4100 and EX3400 models. Built for front-to-back airflow configurations, this module supports hot-swap replacement and redundant power setups to help maintain continuous operation in rack and data center environments. The unit accepts standard AC input and delivers steady 150W output to the host chassis; the power cord is sold separately.

Advantages

This power supply provides redundant AC power capability to improve uptime and reduce single points of failure. Front-to-back airflow orientation is suited for coordinated thermal designs in racks and helps maintain consistent cooling. The hot-swappable design enables replacement without powering down the switch, reducing maintenance windows and operational disruption. The 150W output is matched to specified Juniper chassis requirements for these switch models.

Suitable for

• Juniper EX4100 and EX3400 series switches requiring a 150W AC power module
• Network racks and data centers using front-to-back airflow layouts
• Environments where redundant or hot-swap power modules are needed to maximize network availability

When it may not be suitable

This module is specifically designed for compatible Juniper switch models; it may not be appropriate for non-Juniper devices or switch models that require different power ratings or airflow orientations. If your environment uses back-to-front airflow, a module with the opposite airflow specification will be required. The power cord must be obtained separately, so this supply does not include the AC lead.

Key specifications

• Output power: 150W
• Input type: AC mains (power cord sold separately)
• Airflow orientation: front-to-back
• Hot-swap capability: supported
• Intended application: redundant power module for compatible Juniper switches

How to use

Install the JPSU-150-AC-AFO into a compatible Juniper switch power bay following the switch manufacturer’s installation instructions. Ensure the chassis is designed for front-to-back airflow and that the redundant configuration is set up according to the switch documentation. With the module inserted, connect an appropriate AC power cord to the supply and to a rated power source. For replacement or service, perform a hot-swap procedure as described by Juniper to avoid downtime when redundant power is available.

What to consider before purchase

• Confirm compatibility with your switch model (EX4100, EX3400 or other supported Juniper chassis)
• Verify rack airflow direction and cooling design (front-to-back required)
• Arrange a separate AC power cord that matches local mains plugs and power ratings
• Evaluate whether redundant power module configuration is supported and required in your setup

Usage recommendations

Use this power supply as part of a redundant power strategy: install at least two compatible modules to enable hot-swap replacement and reduce service interruptions. Verify airflow alignment in the rack and ensure the AC cord and power source meet the local electrical codes and power requirements.