Server Technology STV-6509C Switched Per-Outlet Power Sensing PDU

The Server Technology STV-6509C is a vertical zero-U switched PDU built for data center racks that need outlet-level control and per-input power visibility, not just a metered feed. Rated for 11.5 kW at 415V input, the STV-6509C (often searched as STV 6509C) is a PDU/PIPS Pro2 platform unit — it reports voltage, current, power, and power factor at both the input and outlet level, and lets you remotely cycle individual outlets without walking the row. For facilities running dense server or network video recording racks off 3-phase power, that combination of switching plus per-outlet sensing is the difference between guessing at a tripped breaker and diagnosing it from a browser tab.

Overview

This is a tall, narrow vertical PDU — 70 inches tall by just 2.19 inches wide and 2.25 inches deep — designed to mount in the rear channel of a standard rack cabinet without stealing usable U-space from servers, switches, or recorders. Input is a 20A IEC 60309 3P+N+G 6Hr plug running at 415V, 50/60 Hz, with input current rated at 16A continuous against a 20A plug rating — standard practice for keeping continuous load under the NEC 80% derating threshold on a 20A circuit.

Key Features

• 11.5 kW Input Power Capacity: Enough headroom for a fully populated rack of compute or recording hardware without forcing a second PDU into the cabinet.
• Per-Outlet Switching and Power Sensing: Cycle individual C13/C19 outlets remotely and see real per-outlet draw — critical for isolating a misbehaving device without killing power to the whole rack.
• C13 Outlets Rated ≤12A @ 240V L-N and C19 Outlets Rated ≤16A @ 240V L-N: Mixed outlet ratings mean you can drop high-draw equipment on the C19s and standard IT gear on the C13s from the same unit.
• Branch Circuit Breaker Rating ≤16A with 10 kAIC Interrupt Rating: The 10 kAIC rating means the breaker can safely clear a fault current up to 10,000 amps without failing catastrophically — a real spec to check against your upstream panel's available fault current, not a checkbox.
• ± 1% Measurement Accuracy on Voltage, Current, and Power (Input and Output): Billing-grade accuracy at both ends of the PDU means the power data you pull for capacity planning or chargeback is trustworthy down to the outlet.
• ± 3% Power Factor and Branch Current Accuracy: Power factor readings this tight help flag reactive-load problems on mixed IT/networking racks before they show up as utility penalties.
• 10/100/1000 Mbps Ethernet: Gigabit-capable network management means the PDU won't bottleneck your out-of-band management network, and it's fast enough for firmware pushes across a large PDU fleet.
• RS-232 Serial and RJ-12 Link Port: Direct console access for initial configuration plus daisy-chain linking to adjacent PDUs, reducing the number of individual network drops needed per rack row.
• Dual Temperature and Humidity Sensor Inputs: Two each of temp/humidity sensor ports let you monitor actual rack-level environmental conditions from the same device managing power, instead of running separate environmental monitoring hardware.
• Quiescent Power Draw Under 10W: The PDU's own overhead is negligible against an 11.5 kW load — it isn't competing with your equipment for capacity.
• Operating Range 0°C to 50°C, 8-90% RH Non-Condensing, to 6,500ft Elevation: Covers standard data center and most non-conditioned equipment room environments without derating concerns.
• 2-Year Limited Manufacturer Warranty: Standard coverage term for the switched PDU class.

Integration & Compatibility

The Ethernet and serial interfaces put the STV-6509C in line with standard remote power management tooling used alongside network video recorders and edge compute racks, and the RJ-12 link port supports chaining multiple units under one management IP. Pair it with the broader Server Technology power distribution line when standardizing PDU firmware and outlet-naming conventions across a row. For anyone specifying rack power for the first time, a PoE and power planning guide is a useful reference point before sizing branch circuits against a unit like this. Also review PoE network switches and rack mounting accessories when building out the full cabinet, and compare against power distribution units broadly if 415V 3-phase input isn't the right match for your incoming service.

Frequently Asked Questions

Q: What input voltage does the STV-6509C require?

A: The STV-6509C runs on 415V input at 50/60 Hz through a 20A IEC 60309 3P+N+G 6Hr plug, rated for 16A continuous current.

Q: Can I switch individual outlets on the STV-6509C?

A: Yes — the STV-6509C is a switched PDU with per-outlet power sensing, allowing remote outlet-level power cycling and monitoring.

Q: What's the total power capacity of the STV-6509C?

A: The unit supports up to 11.5 kW of input power capacity.

Q: What's the warranty on the STV-6509C?

A: The STV-6509C carries a 2-year limited manufacturer warranty.

Q: What are the dimensions of the STV-6509C?

A: It measures 70.0 inches tall by 2.19 inches wide by 2.25 inches deep — a vertical zero-U form factor for rear-channel rack mounting.

Q: Does the STV-6509C support environmental monitoring?

A: Yes — it includes 2 temperature sensor inputs and 2 humidity sensor inputs for rack-level environmental monitoring.

Marty Allison

The first number I check on any 3-phase PDU spec sheet is the branch breaker interrupt rating, and the STV-6509C's 10 kAIC rating is what tells me it belongs in a real commercial data center panel rather than a light-duty comms closet. Combined with 11.5 kW capacity off a 415V/16A input, this is a PDU sized for a genuinely loaded rack, not a half-empty demo cabinet.

Technical Highlights:

• ± 1% Power Measurement Accuracy (Input and Output): That tolerance holds at both the input and the outlet level, so the per-outlet numbers you pull for capacity planning aren't rounded-off estimates.
• C13 ≤12A / C19 ≤16A @ 240V L-N Outlet Ratings: Mixed outlet classes on one unit mean you're not stuck buying a second PDU just because one server has a C19 inlet.
• 10/100/1000 Mbps Ethernet + RJ-12 Link Port: Gigabit management plus daisy-chain linking keeps a multi-PDU row on a manageable number of IP addresses and network drops.

Deployment Considerations:

• At 70 inches tall and only 2.19 inches wide, this is a rear-vertical mount — confirm your cabinet's rear channel depth clears the 2.25-inch body before ordering.
• The 16A input current rating against a 20A plug is standard continuous-load derating — don't spec this unit assuming you get the full 20A nameplate rating continuously.

This is the right call for a 3-phase 415V data center row where you need outlet-level kill switches and real per-outlet metering — for example, a colocation cage running mixed customer equipment where isolating one tenant's misbehaving server without a truck roll actually matters. If your service is 208V single-feed instead of 415V 3-phase, look at a lower-voltage model in the same PIPS Pro2 family before specifying this one.