JPSU-350-AC-AFI: Juniper 350W AC Switch Power Supply AFI Airflow
Also listed as: 740-046873, JPSU-350-AC-AFI=
The Juniper JPSU-350-AC-AFI is a 350W AC hot-swappable power supply with back-to-front airflow designed for Juniper EX and QFX Series compact switches.
Specifications
| Part number | JPSU-350-AC-AFI |
|---|---|
| Brand | Juniper |
| Type | Power supplies |
| Other numbers | 740-046873, JPSU-350-AC-AFI= |
| Status | current |
| Form factor | Internal hot-plug module |
| Power output (W) | 350 |
| Input voltage | 100-240 VAC |
| Efficiency | Platinum |
| Airflow | Port-to-FRU (Back-to-Front) |
About the JPSU-350-AC-AFI
The Juniper JPSU-350-AC-AFI power supply module delivers 350 Watts of regulated AC electrical power for enterprise fixed-configuration switches. Engineered with back-to-front airflow (port-to-FRU cooling direction), it matches hot aisle and cold aisle data center cooling designs while providing dual redundant power protection.
Compatibility
Compatible with Juniper EX4300, EX4600, and QFX5100 series switches. It operates in dual power supply configurations to supply uninterrupted system failover protection and balanced load sharing across independent AC power distribution circuits in equipment racks.
How to identify a genuine unit
Enclosed in a sheet metal module casing with a blue or silver release lever, internal cooling fan, IEC C14 power inlet, and front status indicator LEDs. The vendor label specifies part designation JPSU-350-AC-AFI and Juniper assembly code 740-046873.
Buying used
Inspect the rear edge card connector for burn marks, bent pins, or mechanical wear. Slide the power supply into an active switch chassis to verify that the cooling fan spins smoothly without bearing noise and check that Junos OS reports normal power supply status.
Fits these models
- Juniper EX Series EX4300
- Juniper EX Series EX4300 Multigigabit
- Juniper EX Series EX4400
- Juniper EX Series EX4400 Multigigabit
- Juniper EX Series EX4600
- Juniper EX Series EX4650
- Juniper QFX Series QFX5100-24Q
- Juniper QFX Series QFX5100-48S
- Juniper QFX Series QFX5100-96S
- Juniper QFX Series QFX5110-32Q
- Juniper QFX Series QFX5110-48S
Check compatibility with Juniper
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Juniper has tested with the Juniper JPSU-350-AC-AFI.
- Compatibility Juniper Hardware Compatibility Tool (optics and modules)
- Specifications Juniper TechLibrary
- Support Juniper Support
FAQ
What switches use the JPSU-350-AC-AFI power supply?
It powers Juniper EX4300, EX4600, and QFX5100 compact switch models.
What does AFI signify in the model number?
AFI signifies Airflow In, meaning cold air enters through the port side and exhausts out the FRU rear side.
Buying or selling JPSU-350-AC-AFI?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Juniper Hardware Compatibility Tool JPSU-350-AC-AFI, checked 2026-10-27