APC Rack Mount Transfer Switch UPS Source Transfer Switch for use with AP9335TH, AP9335T

Schneider UPS Source Transfer Switch, 43.2cm Width, 23.6cm Depth - AP4421A

This UPS source transfer switch provides automatic switching between power sources for rack-mounted UPS equipment in data-centre and network installations. It is designed as an accessory for compatible UPS units, enabling orderly transfer of supply to maintain continuity during source changes while meeting electromagnetic disturbance standards.

Features and Benefits:

• Rack-mount form factor enables neat installation in server cabinets
  Conforms to EN55022 class A ensuring controlled radiated emissions
  Meets FCC part 15 class A for regulated electromagnetic performance
  Compatible connection with AP9335TH and AP9335T simplifies integration
  Long physical reach supports installations requiring extended cable runs

Applications

• Suitable for redundant power arrangements in server rooms
  Used with UPS devices in telecommunications racks
  Ideal for branch-circuit switching in enterprise IT closets
  Can be used for source transfer in network operations centres

What physical footprint should I allow in a rack?

The device is provided as a rack-mount transfer switch and occupies standard cabinet space appropriate for such accessories
allow clearance for cabling and ventilation at the rear.

Which UPS models will interface directly with the unit?

It connects with the specific compatible UPS models referenced for integration as a dedicated transfer accessory.

How does the unit address electromagnetic emission limits?

The switch is designed and verified to meet recognised emission criteria under EN55022 class A and FCC part 15 class A requirements.

Can it be used where long cable runs are required?

Yes, the product’s specified length dimension accommodates installations that require extended physical routing of connections.