Juniper Networks PWR-M40-AC M40 AC Power Supply

Overview
The Juniper Networks PWR-M40-AC, also known as the M40 AC Power Supply, delivers reliable, high-efficiency power to a range of Juniper networking devices. Designed for continuous operation in demanding data center and campus environments, this power supply provides stable AC input conversion and protects critical network infrastructure from power fluctuations.

Key Features

• Universal AC input range 100-240 V for global deployment
• High efficiency conversion reduces energy consumption and heat generation
• Built-in over-voltage, over-current and short-circuit protection
• Hot-swap capable for non-disruptive maintenance
• Compact form factor compatible with standard Juniper chassis
• LED status indicator for quick visual health checks

Technical Specifications

• Model / Part Number: PWR-M40-AC
• Output Power: 40 W
• Output Voltage: 12 VDC
• Output Current: 3.33 A
• Input Voltage: 100-240 VAC, 50/60 Hz
• Operating Temperature: 0 to 40 deg C
• Storage Temperature: -40 to 70 deg C
• Dimensions: 140 mm x 100 mm x 35 mm (L x W x H)
• Weight: approx 0.8 kg

Applications
The M40 AC Power Supply is ideal for powering Juniper routers, switches and security appliances in enterprise data centers, service provider networks, and branch office deployments. It supports mission critical routing platforms, high-performance switching stacks, and firewall devices where uninterrupted power is essential. Its hot-swap capability allows technicians to replace the unit without shutting down the network, minimizing downtime and maintaining service level agreements.