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Description
Apc By Schneider Electric Ap4421a - Apc Netshelter Rack Automatic Transfer Switch - 1u - Input 230 V Ac 1Protect your most critical IT gear with the APC by Schneider Electric AP4421A Netshelter Rack Automatic Transfer Switch (ATS). Engineered for 1U rack space and designed for singlephase 230 V AC environments, this compact device ensures your servers, storage, and networking equipment stay online by automatically switching power sources with minimal disruption. Built to pair seamlessly with APC Netshelter racks, the AP4421A is a smart, spacesaving
Protect your most critical IT gear with the APC by Schneider Electric AP4421A Netshelter Rack Automatic Transfer Switch (ATS). Engineered for 1U rack space and designed for single‑phase 230 V AC environments, this compact device ensures your servers, storage, and networking equipment stay online by automatically switching power sources with minimal disruption. Built to pair seamlessly with APC Netshelter racks, the AP4421A is a smart, space‑saving solution that minimizes downtime, simplifies rack power management, and helps you maintain maximum uptime for business‑critical workloads in data centers, edge locations, and crowded server rooms.
In today’s data‑driven world, power reliability is security. The AP4421A delivers reliable automatic transfer between primary and alternate power sources, allowing you to maintain service levels even during outages or irregularities in your electrical supply. Its 1U footprint means you can maximize rack density without sacrificing safety or performance. This ATS protects connected equipment from power disturbances, helps prevent data loss during outages, and supports smooth operation of critical IT infrastructure. Whether you’re running a compact private cloud, a distributed edge solution, or a traditional data center, the AP4421A provides a dependable, easy‑to‑manage power solution that scales with your rack environment.
With intuitive indicators, straightforward installation, and robust build quality, the AP4421A is an expense‑effective upgrade for any APC Netshelter deployment. The unit is optimized for rack‑mounted ecosystems and is capable of monitoring and maintaining power continuity across a range of devices. It’s an essential component for IT teams seeking to reduce outage impact, streamline maintenance windows, and improve overall rack resilience. By ensuring an automatic, seamless transfer between power sources, this switch helps protect your IT investments and keeps critical services available when it matters most.
- Seamless automatic transfer: The AP4421A continuously monitors both power sources and automatically transfers load to the available source with minimal disruption. This means servers, storage, and networking gear stay online during short outages or fluctuations, preserving session continuity and protecting data integrity.
- Compact 1U rack‑mount form factor: Specifically designed for Netshelter enclosures, this ATS fits neatly into a standard 19" rack while preserving valuable cabinet space for additional equipment, PDUs, and cooling infrastructure.
- Single‑phase 230V AC input: Engineered for common data‑center power configurations, the AP4421A supports the standard 230V single‑phase supply, aligning with typical commercial electrical systems and simplifying integration with existing power distribution schemes.
- Rack‑level power protection and monitoring: Front‑panel indicators and built‑in alarms provide clear visibility into source status and transfer events, enabling quick diagnostics and proactive maintenance for uninterrupted operations.
- Easy installation and deployment: Designed to integrate with APC Netshelter infra, the AP4421A reduces deployment time, minimizes wiring complexity, and delivers a plug‑and‑play workflow that IT teams can implement with minimal downtime during installation.
Technical Details of AP4421A
- Model: AP4421A Netshelter Rack Automatic Transfer Switch
- Form factor: 1U rack‑mount
- Input: 230V AC, single‑phase
- Output: Power to connected rack Equipment (servers, storage, networking gear)
- Transfer mechanism: Automatic transfer between two AC sources to maintain uninterrupted service
- Compatibility: Optimized for APC Netshelter enclosures and APC power‑distribution ecosystems
- Indicators: Front‑panel status LEDs to monitor source availability and transfer events
how to install AP4421A
- Choose a suitable 1U slot within your APC Netshelter rack that provides easy access for cabling and maintenance.
- Mount the AP4421A securely in the selected 1U position, following rack mounting guidelines to ensure proper ventilation and cable management.
- Connect the primary and alternate AC power sources to the AP4421A input ports, observing proper voltage, grounding, and safety practices.
- Route and connect the ATS output to the rack devices you want protected (servers, storage, and networking equipment), ensuring the total connected load remains within the unit’s rated capacity.
- Power on the system, verify correct LED indicators, and perform a controlled transfer test to confirm seamless handover between sources under load conditions.
Frequently asked questions
- Q: What is the AP4421A Netshelter Rack Automatic Transfer Switch? The AP4421A is a 1U, rack‑mount automatic transfer switch designed for APC Netshelter enclosures, providing seamless transfer between two AC sources to protect critical IT gear from power disturbances.
- Q: What environments is the AP4421A best suited for? It is ideal for data centers, server rooms, and edge deployments that require reliable power continuity for servers, storage, and networking devices, all within a 1U rack form factor.
- Q: What voltage and phase does it support? The AP4421A supports 230V AC in a single‑phase configuration, compatible with standard data‑center electrical infrastructure.
- Q: How does the automatic transfer work? The unit continuously monitors both power sources and automatically transfers the load to the healthy source when a disruption or outage is detected, minimizing downtime and avoiding unexpected restarts of protected equipment.
- Q: Is installation complex? No—it's designed for easy integration within APC Netshelter racks. With proper cable routing and mounting, you can complete installation with minimal downtime and straightforward ongoing maintenance.
Shipping Notes
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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- To process your return/exchange, please contact us at [email protected]
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4.5 ★★★★★
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Product Reviews
★★★★★ 4
They refunded the amount. We just had to send it to them 2 times before they did.
We bought a printer and it was having issues from the beginning. We thought at first it had to do with the WIFI, so we didn't say anything, but then more things were going wrong. I talked to the manufacturer, who said it needed to be replaced but we had to go through Asurion. Asurion "fixed" it and sent it back but we had our doubts. Sure enough, it was within the same month we were sending it in again.
This time they just gave us an amazon gift card for the entire amount we had paid. Thankful for the warranty. They ultimately did the right thing, I just wish we could have gotten it done faster.
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Reviewed in the United States on October 9, 2023
★★★★★ 5
Get protected!
Very easy to use and responsive.
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Reviewed in the United States on March 6, 2026
★★★★★ 5
Very helpful
Good plan to have.
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Reviewed in the United States on February 21, 2026
★★★★★ 5
Asurion worked as intended.
After three years, my monitor failed. Asurion paid to send it to a repair center. I didn't save the box the monitor came in, and paid $23 to have it packaged up. They kept me informed of the various steps, such as en route, arrived, testing, and repair started. They discovered it could not economically be repaired and refunded my purchase price. The entire process from me telling them it was broken until the refund took 5 days. I am well satisfied with the service.
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Reviewed in the United States on August 31, 2025
★★★★★ 5
A great phone...but compared to what?
Digital Storage Capacity: 128 GB, Color: Black
Tldr: Good phone for this price, noticeably better than older A13 and I wish more people would include context to their reviews. Glad I bought mine.
I'm leaving a long and detailed review because I got tired of reading through reviews that seemed contradictory, or said something was "bad" but without any context. If I made a poor choice buying a phone I'd likely be stuck with it for some years. I'm hoping this helps others like myself who are reading the reviews.
Ok, so the most important context is what phone I'm coming from over to the A17 5g. My old phone was Samsung A13 5g. My opinions of the new phone will be largely based on how they compare to the previous phone I used. So it's budget phone to budget phone, with the A17 having approximately 3-4ish years newer tech (or same tech but cheaper.) Both phones are being used on metro PCS (T mobile) network.
So I've now had the A17 for exactly one week. I primarily use my phone for android auto, text, checking email, web browser, occasional YouTube and maybe once per week on some games. I don't use it for heavy loads like massive file transfers or rendering video. It's fairly light use overall.
So far, the things I've been most pleased with are the screen and software/system layout. The screen has decent color and brightness and is MUCH better than the A13. Both screens claim to run at 90hz but the change from the old 270 PPI (I believe stands for pixel per inch or some equivalent) to 385 PPI feels massive. Much cleaner image from text to images. The change from LCD to AMOLED gives much better contrast with deeper colors. The software and system layout are a bit harder to describe in detail. It's more of a personal/ascetic preference. Things look and feel a lot cleaner. There are added optional features like side slide tabs to house shortcuts for certain apps. Another feature is top down swipe from the right for system shortcuts and from the left for notification, so they are smashed together.
Another improvement, though less so than the screen and software changes, is in the speed and responsiveness of the phone. This one also needs to be put in context a bit. I'm sure some would complain about it while coming from a more expensive and technologically superior phone. I have my own bias, as I'm coming from an inferior phone which had over 3 years of use (slowing it down over time.) I also use it for mostly light tasks. That being said, I am pleased that the phone is noticeably more responsive than my old one. Most of the lagging happens on start up (goes away after a few mins while the phone is connecting a bunch of apps and putting out/requesting info like date/time/location.) When I booted it for the first time, that was the worst lag I had. It will also slow down if you have several apps running at the same time. I feel like that's obvious, but some people genuinely don't know that if you hit the home button to leave an app, you need to bring up multi view and actually swipe the box away to close it fully. If you never close apps and never restart your phone on occasion it WILL slow way down. While using the phone for max 1 or 2 things at time it runs perfectly fine, and is better than the A13.
Battery life is good. I went from appx. 5000mAh to 5000mAh phones, so besides the slight degradation in the old phones battery life it should be the same. 5000mAh for my uses feels excellent overall. It can go for a full 2 days without charging. Charging speed itself seems improved, but that's never mattered too much for me so I can't comment much. Seems fine though, roughly 1.5h charge from mostly dead to full. That's using a 25w fast charger block and appropriate USB c cable. I didn't use the cable that came with the phone so I can't comment. It didn't come with a charger block, by design. Your mileage on charge speed will vary based on what you're using to charge the phone with. The phone can't charge at full speed if you're using a 5w charger from 15 years ago.
I don't have much to say about the camera. I rarely take photos and when I do it's usually quick snap shots of paper instructions or to share location. I believe (though I'm not sure) the A13 was also 50mp front camera but either the the other 2 lenses have been upgraded or they improved the camera software, because pictures do look a bit cleaner. It's not night and day or anything, but it looks better to my eye. Camera is also faster to adjust light and contrast when first focusing on a object, as compared to the old A13.
Build quality seems a little improved. They are both budget phones and how build quality "feels" is inherently subjective but to me it does seem a little better.
A quick note on activating this new phone...this may only be an issue I personally had, but in case this helps someone else I'd like to include it. I had a bit of trouble switching my physical SIM card out of my old phone and into the new. The metro app was telling me the phone wouldn't be compatible unless I changed phone plans (which is BS.) I had to call customer service and they opted to use the eSiM feature, rather than swapping the physical Sim. I noticed they also used the new phones 2nd SIM number to activate it, while i had tried using first. If you're having trouble perhaps check the phones info from the settings menu, and then try eSIM activation using the 2nd address. It worked fine for me after this.
Samsung has a quick transfer feature if your previous phone was a Samsung. It basically copies over everything from your old phone, including apps, pictures, contacts and even text message history ect. It took 3 or 4 attempts (it didn't want to connect and dropped the connection once at 30% complete.) Luckily if it disconnects part way through, it will pick up where it left off, without needing to restart. Once it finally had a stable connection it took me about 6 minutes, it will vary based on how much stuff you have to move over. You need to download an app to do the transfer, but it will prompt you and take you to it's link.
Summery: I find it pretty impressive how nice this phone feels both compared to its older model and for its price point in general. I found it frustrating that people would say this part or that was crap or great, but without giving any context to what they based that opinion off of. In my opinion, based on how cheap this phone is and compared to its older model (A13) this is an awesome phone so far, being one week in. Screen is a big improvement, system software and layout is better (IMO) and they seem to be making incremental improvements to things like the camera and overall build. For this price point I find it really impressive what you actually get. If you're coming from an older mid range phone I expect it will either be inferior or about the same. If you're coming from another phone in the 200 range it should be decent to good. For less than 200 and for what I use it for though, I'm very happy I bought this phone.
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Reviewed in the United States on May 3, 2026