Description
Ensure redundant power protection for single-corded devices with the Vertiv PowerIT VA4N21A2 Rack Transfer Switch (RTS). Designed for 20A, 120V loads, this intelligent, horizontal 19" rackmount rPDU features 10 NEMA 5-20R outlets and dual L5-20P input plugs. It offers automated switching within 4–8ms, power monitoring, and optional environmental sensing to maintain uptime in critical IT environments. Built with fault-tolerant daisy chaining, dual Ethernet, and a local high-visibility display, it supports scalable deployment with up to 50 devices on one IP address.
| Specification | Details |
|---|---|
| Model Number | VA4N21A2 |
| Product Type | Rack Transfer Switch (Monitored, Unit Level) |
| Power Capacity | 20A, 120V, 1.9kW |
| Mounting | Horizontal 19" Rackmount (Adjustable 4-post 24"–37"; 2-post compatible) |
| Receptacle Type & Qty | (10) NEMA 5-20R |
| Plug Type | (2) NEMA L5-20P (Twistlock) |
| Transfer Time | < 4–8 milliseconds |
| Auto Power Switching | Yes (out-of-phase transfers supported) |
| Monitoring | Input power monitoring (V, A, PF, W, VA, kWh); local LED + remote |
| Network Connectivity | Dual Ethernet 10/100/1000 Mbps, Daisy Chain up to 50 devices |
| Protocols Supported | DHCP, SNMP, Modbus TCP, HTTPS, Syslog, etc. |
| Environmental Monitoring | Yes (via optional sensors; up to 16) |
| USB / Serial | USB, RS232 via RJ45 |
| Data Access Formats | CSV, JSON API, JSON datalog |
| Dimensions (HxWxD) | 1.72" x 17" x 18" (44mm x 432mm x 457mm) |
| Weight | 10 lbs (4.54 kg) |
| Finish | Black Powder Coat |
| Operating Temp | Max 60°C (140°F) |
| Warranty | 5-Year Limited (with registration) |
| Certifications | UL & c-UL 62368-1, RoHS, FCC Part 15 Class A |
Payment & Security
Your payment information is processed securely, and we do not store credit card details or access your credit card information.
Return Policy (Short Summary)
We offer a 30-day return window for most unopened, factory-sealed items.
Returns must be authorized before shipping back and must include all original packaging and accessories. Opened or used items are not returnable unless defective.
Some products—such as custom orders, special-order items, audio gear, software, and LED video walls—are non-returnable. Non-defective returns may be subject to a 20–30% restocking fee, and customers are responsible for return shipping costs.
For damaged or incorrect items, please contact us immediately.
From Scope to Sign-Off
A structured delivery process designed to reduce risk and keep projects moving.
Plan
Discovery, site review, requirements gathering, and project alignment. We define scope, constraints, and success criteria before any design work begins.
- Discovery calls & stakeholder interviews
- On-site survey & infrastructure review
- Requirements & use-case documentation
- Project scope, timeline & milestone alignment
Engineer
System design, schematics, signal flow, BOM development, and documentation. Every project leaves this phase with a complete engineering package.
- AV system design & signal flow diagrams
- Equipment selection & BOM development
- Rack layout & control system design
- As-built documentation package
Deploy
Procurement, logistics, installation, programming, commissioning, and training. We own the delivery from first shipment to final handoff.
- Authorized procurement & logistics coordination
- Physical installation & cable management
- Control system programming & configuration
- Commissioning, testing & end-user training
Support
Monitoring, maintenance, lifecycle planning, and long-term service agreements. We stay engaged long after project close.
- 24/7 remote system monitoring
- Preventive & reactive maintenance
- Technology lifecycle & refresh planning
- Long-term service level agreements
A decade of delivery — trusted by 275+ clients across industries
