Vertiv VA4U21A0 Rack Transfer Switch, 16A/20A, 120-230V, Monitored
by Vertiv
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 |