Description
The Vertiv VA4U21A0 Rack Transfer Switch (RTS) provides reliable, redundant power to single-corded devices by seamlessly switching between two input sources within 4-8 milliseconds. Designed for critical IT and edge applications, it ensures uptime with monitored unit-level power usage, environmental sensor compatibility, and advanced network protocols. This 19" horizontal rPDU features 12 combination C13/C19 outlets and dual C20 power inlets, ideal for dynamic and resilient rack power distribution.
| Specification | Details |
|---|---|
| Model | VA4U21A0 |
| Function | Rack Transfer Switch (RTS) - Monitored Unit Level |
| Input Power | 2 × IEC60320 C20 Inlets (cords sold separately) |
| Output Receptacles | 12 × Combination C13/C19 |
| Voltage Range | 100-240V |
| Current Rating | 16A or 20A |
| Load Capacity | 1.9kW (120V), 3.3kW (208V), 3.6kW (230V) |
| Transfer Time | <4-8ms (Supports Out-of-Phase Transfers) |
| Monitoring | Input power, unit-level kWh, W, VA, PF, V, A |
| Environmental Monitoring | Supported via optional sensors (up to 16) |
| Networking | Dual Gigabit Ethernet; Daisy-chains up to 50 devices |
| Protocols Supported | SNMP (v1/v2c/v3), HTTP/S, SSH, Syslog, Modbus TCP, TACACS+, and more |
| Display | LCD with auto orientation |
| Mounting | 19" Horizontal Rackmount, adjustable 4-post (24"-37") or 2-post kit |
| Chassis Color | Black Powder Coat |
| Dimensions (HxWxD) | 1.72" x 17" x 18" (44mm x 432mm x 457mm) |
| Weight | 15 lbs (6.8 kg) |
| Operating Temp. | Up to 60°C (140°F) |
| Certifications | UL/c-UL, CE, UKCA, RoHS, FCC Class A, EN 55032/55035, China RoHS |
| Warranty | 5 years (with registration), otherwise 3 years |
Payment & Security
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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.
Building a Complete AV System?
This product is rarely deployed alone. It’s typically part of a fully integrated AV system. AVENDOR designs, integrates, and supports end-to-end environments—from single rooms to enterprise-wide deployments.
- System Design & Engineering
- Installation & Integration
- Programming & Ongoing Support
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