APC by Schneider Electric AP4450AJ 100V 1U Rack Automatic Transfer Switch
Overview
The APC by Schneider Electric AP4450AJ is a 1U rack-mount automatic transfer switch (ATS) designed for 100VAC environments that cannot tolerate a single point of power failure. It accepts two independent NEMA 5-15P input feeds and switches between them in 10 milliseconds maximum — fast enough to keep most server and network hardware online without a reboot or brown-out event. If your rack draws from two separate PDUs, two separate UPS units, or a utility feed plus a generator feed, the AP4450AJ turns that redundancy into a live, automatic failover circuit. Explore the full APC by Schneider Electric catalog for complementary power infrastructure products.
With ten NEMA 5-15R output receptacles and a 15A maximum output, the AP4450AJ fits dense 1U rack environments where you need distributed, protected outlets — not a single power strip with no transfer capability. This is purpose-built for Japanese 100V deployments (nominal 100VAC, acceptable range ±10%), and PSE/UL/EN/IEC 62368-1 safety compliance is verified for that market.
Key Features
- ≤10ms Transfer Time: The switch-over between Source A and Source B completes in 10ms maximum. Most enterprise-class servers, switches, and NVRs tolerate brief interruptions in this range without dropping power — meaning a source failure triggers automatic recovery without requiring staff intervention or system restarts.
- Dual NEMA 5-15P Inputs, 2.44m (8 ft) Cord Length: Both input cords run 2.44 meters, giving you enough reach to connect to two independent rack PDUs or UPS outputs positioned above or below the ATS in a standard 2-post or 4-post rack. No extension cords needed in most deployments.
- Ten NEMA 5-15R Output Receptacles: Ten outlets on a single 1U device means one AP4450AJ can cover a full complement of 1U servers, switches, or IP cameras in a compact rack — reducing the number of power devices you have to manage and cable.
- 15A Maximum Output / 10kA Short Circuit Current Rating: The 10kA SCCR means this ATS can handle the fault currents present in commercial electrical panels without failing unsafely. That rating matters when the device is installed downstream of a standard 15A branch circuit in a server room or IDF closet.
- ±10% Input Voltage Tolerance: The AP4450AJ accepts 90–110VAC on either input. In facilities where voltage sags are common — older buildings, high-load industrial environments — this tolerance prevents nuisance transfers triggered by normal voltage fluctuation rather than true source failure.
- 1U Form Factor, 431.8mm Wide: At 43.7 × 431.8 × 236.2mm (1.72 × 17.00 × 9.30 in), the AP4450AJ occupies a single rack unit and fits standard 19-inch rack rails. At 4.40kg (9.70 lb) it is light enough to mount without assistance in most deployments.
- Operating Range −5 to 45°C, Up to 3,000m Elevation: The unit operates in environments up to 45°C — suitable for uncooled or lightly cooled network closets — and functions at elevations up to 3,000m (10,000 ft), covering virtually all above-ground commercial building installations without derating.
- PSE / UL / EN / IEC 62368-1 Safety Compliance: PSE certification is the Japanese market safety mark required for commercial electrical equipment. UL/EN/IEC 62368-1 compliance covers audio/video and IT equipment safety standards recognized internationally — relevant for mixed-vendor rack environments where compliance documentation is required for facilities approval.
- J55022 (H22) EMC Compliance: Meets Japanese EMC Class H requirements, confirming the device does not introduce electrical noise that could interfere with sensitive networking or video equipment sharing the same rack.
Integration & Compatibility
The AP4450AJ is designed for 100VAC / 50–60Hz electrical infrastructure standard in Japan. It does not perform voltage conversion — both input sources must supply 100VAC within the ±10% tolerance band. It is not compatible with 120VAC North American circuits or 230VAC European circuits without a separate step-down transformer.
The ten 5-15R output receptacles are compatible with standard NEMA 5-15P plugged devices drawing up to 15A aggregate. For network switches and IP cameras on PoE infrastructure, verify aggregate rack draw stays below the 15A circuit limit — a fully populated PoE switch can approach that threshold on its own. Pair with a compatible UPS on each input feed to extend the value of the automatic transfer capability into a full power continuity solution.
For racks housing network video recorders or storage appliances, the ATS fits naturally between the dual-feed UPS outputs and the equipment power inlets, providing both outlet distribution and source-switchover in one 1U device. Consult the power protection planning guide to calculate load budgets before deploying in high-density racks.
Frequently Asked Questions
Q: What is the maximum load the AP4450AJ can support?
A: The AP4450AJ is rated for a maximum output of 15A at 100VAC, which equals 1,500VA / 1.5kW at unity power factor. Keep aggregate rack load below this threshold. The device also carries a 10kA short circuit current rating for fault protection at that level.
Q: How fast does the AP4450AJ switch between power sources?
A: Transfer time is 10 milliseconds maximum. Most enterprise networking and server equipment tolerates this duration without dropping power, though power-sensitive loads such as certain legacy audio or analog equipment may require a UPS on each source feed for true ride-through.
Q: Is the AP4450AJ compatible with 120VAC circuits used in North America?
A: No. The AP4450AJ is designed for 100VAC nominal (±10%, so 90–110VAC). It is not rated for 120VAC North American circuits. This model is intended for Japanese electrical infrastructure deployments.
Q: What input connectors does the AP4450AJ use?
A: It ships with two fixed 2.44m (8 ft) NEMA 5-15P input cords — one per source. These connect directly to your rack PDU outlets or UPS receptacles. No adapters are included or required for standard 100VAC 5-15 infrastructure.
Q: Can the AP4450AJ be mounted in a standard 19-inch rack?
A: Yes. At 43.7 × 431.8 × 236.2mm (1.72 × 17.00 × 9.30 in) it occupies one rack unit (1U) in a standard 19-inch rack enclosure. Mounting hardware should be confirmed against the product packaging contents, as bracket configurations vary by rack type.
Q: What safety certifications does the AP4450AJ carry?
A: The AP4450AJ carries PSE (Japanese market safety), UL, EN, and IEC 62368-1 safety certifications, plus J55022 (H22) EMC compliance for the Japanese market.
The AP4450AJ is one of those devices that earns its rack unit by eliminating an entire failure mode. The 10ms transfer ceiling is the spec that matters most here — that is within the hold-up time of virtually every modern switching power supply, which means a source failure becomes a non-event for the connected equipment rather than a cascade of reboots and alert storms.
Technical Highlights:
- 10ms Maximum Transfer: Most ATSs in this class spec 8–16ms; 10ms puts the AP4450AJ squarely within the power-supply ride-through window for enterprise servers and network appliances, making source failover transparent to connected loads.
- 10kA SCCR: A 10kA short circuit current rating means this device is rated for the fault currents available on standard commercial branch circuits — not just SOHO environments. That rating is load-bearing for facilities compliance documentation in commercial server rooms and IDF closets.
- ±10% Input Tolerance (90–110VAC): In older Japanese commercial buildings where voltage sags under load are common, a ±10% window prevents the ATS from treating a legitimate voltage dip as a source loss — avoiding nuisance transfers that would negate the stability you installed the device to provide.
Deployment Considerations:
- Both input feeds must be 100VAC within the ±10% band. If your facility has mixed voltage infrastructure, verify both upstream PDUs or UPS units are supplying 100VAC — this ATS performs no voltage conversion, and mismatched source voltages can cause preference logic issues.
- With 15A max output across ten outlets, a fully loaded deployment averages 1.5A per outlet — sufficient for 1U servers and networking gear, but watch aggregate draw carefully if any outlet hosts a device with high inrush current (storage arrays, PoE switches at full port utilization) that could spike toward the 15A trip threshold.
This unit fits cleanest in a Japanese datacenter or network operations closet where dual-feed PDU infrastructure already exists and the gap is the switchover layer — the AP4450AJ closes that gap in 1U without adding a secondary UPS runtime layer to the rack power budget.
