Server Technology STV-4541B 0U Switched PIPS Rack PDU

Overview

The Server Technology STV-4541B is a 0U vertical switched PDU built for data center and network closet racks where per-outlet control and circuit-level visibility matter more than floor space. It pairs 18x IEC C13 and 6x IEC C19 outlets on a single 208V, 3.3kW-capacity strip with Per-Input Power Sensing (PIPS) — a metering architecture that reports voltage, current, and power at the input rather than estimating it from downstream math. For teams managing dense server racks, this PDU belongs in the same planning conversation as your network video recorders and other always-on rack gear that can't tolerate an unplanned circuit trip.

Key Features

• 18x IEC C13 + 6x IEC C19 outlets: covers a mixed rack of servers, switches, and storage without juggling adapters — C13 branches rated ≤12A @208V L-L (15A peak) and C19 branches ≤16A @208V L-L (20A peak) give headroom for higher-draw devices on the C19 runs.
• 208V input at 20A (NEMA L6-20P plug), 16A rated current: matches standard commercial data center circuits; the 3.3kW input power capacity is the number to check against your actual rack load before committing this unit to a high-density cabinet.
• Per-Input Power Sensing (PIPS): measures voltage, current, active power, apparent power, power factor, crest factor, and energy at ±1% accuracy (power factor ±3%, crest factor ±10%) — accurate enough to feed capacity planning and billback reporting instead of rough estimates.
• Branch circuit protection to UL 489, CSA C22.2 No. 5, and IEC/EN 60947-2: breakers rated ≤16A with a 5 kAIC interrupt rating isolate a fault to its own branch instead of dropping the whole strip — a real consideration when one server's PSU fails at 2 a.m.
• 10/100/1000 Mbps Ethernet plus RS-232 serial: gives you both network-based remote switching/monitoring and a local console path for initial configuration or when the network segment is down.
• Two temperature/humidity sensor inputs with RJ-12 link port: lets the PDU double as an environmental monitoring point for the rack and link additional units without a separate cable run.
• Broad management protocol support (HTTP/HTTPS, TLSv1.2, SSHv2, Telnet, SNMPv2c/v3, IPv4/IPv6, LDAPv3/LDAPS, TACACS+, RADIUS, FTP/SFTP): fits into existing NOC authentication and monitoring stacks rather than forcing a standalone login and a new tool to babysit.
• Unloaded power draw under 10W: the PDU's own overhead barely registers against a 3.3kW budget, so it isn't quietly eating into the capacity you're trying to monitor.
• Operating range 32°F to 140°F (0°C to 60°C), 8-90% RH non-condensing, up to 6,500ft elevation: covers standard data center and most non-climate-controlled equipment room conditions; storage range extends to -22°F to 176°F for staged/spare units.
• 0U vertical form factor, 69.0in tall x 1.75in wide x 2.25in deep: mounts in the rear rail channel without consuming rack unit space that could otherwise hold compute or storage.

Integration & Compatibility

The STV-4541B's SNMP v2c/v3 and web interface support let it report into most rack monitoring and DCIM platforms without custom drivers, and TACACS+/RADIUS/LDAPS support means access can be tied to existing network authentication rather than a local-only account list. If you're standardizing rack infrastructure, pair this PDU with a documented PoE switch selection and review your PoE planning guide so downstream power budgets and this unit's 3.3kW input ceiling stay in sync during design, not after the rack ships. It's part of the broader Server Technology PDU catalog, which spans switched, metered, and basic strip variants for racks with different monitoring requirements — worth a look if the STV-4541B's outlet mix doesn't match your specific cabinet.

Frequently Asked Questions

Q: What input voltage and plug does the STV-4541B require?

A: It runs on 208V at 50/60 Hz through a NEMA L6-20P plug, rated for 20A input current (16A rated).

Q: How many outlets does the STV-4541B have and what's the mix?

A: 24 total outlets: 18x IEC C13 (≤12A @208V L-L, 15A peak) and 6x IEC C19 (≤16A @208V L-L, 20A peak).

Q: What's the maximum power capacity of the STV-4541B?

A: The input power capacity is 3.3kW; branch circuit breakers are rated at ≤16A each with a 5 kAIC interrupt rating.

Q: Does the STV-4541B support remote monitoring and management?

A: Yes — it includes 10/100/1000 Mbps Ethernet and RS-232 serial, with support for HTTP/HTTPS, TLSv1.2, SSHv2, Telnet, SNMPv2c/v3, IPv4/IPv6, LDAPv3/LDAPS, TACACS+, RADIUS, and FTP/SFTP.

Q: What is Per-Input Power Sensing (PIPS) on this model?

A: PIPS measures voltage, current, active power, apparent power, power factor, crest factor, and energy at the input, with accuracy rated at ±1% for voltage, current, active power, and apparent power.

Q: What's the warranty on the STV-4541B?

A: It carries a 2-year limited manufacturer warranty.

Karl Wilson

The STV-4541B (often searched as STV 4541B) is a 208V 0U PDU I'd spec for any rack where you need branch-level breaker protection AND real input metering, not one or the other. The 3.3kW capacity behind a 20A NEMA L6-20P feed is the number to check first — it caps what you can safely load across the 18 C13 and 6 C19 outlets combined.

Technical Highlights:

• PIPS metering accuracy: ±1% on voltage, current, active power, and apparent power means the readings are tight enough to use for real capacity planning, not just a rough go/no-go indicator.
• Branch protection to UL 489 / IEC 60947-2 at ≤16A, 5 kAIC: a shorted PSU on one C13 branch trips that breaker, not the whole strip — I've seen strips without per-branch protection take down an entire rack over one bad power supply.
• Dual environmental sensor inputs plus RJ-12 link port: lets one PDU also carry temp/humidity monitoring for the cabinet, which saves a separate sensor deployment on small-to-mid racks.

Deployment Considerations:

• Confirm your circuit is actually 208V before ordering — the NEMA L6-20P plug and 3.3kW rating assume that input; this isn't a 120V-compatible unit.
• The 69.0in height means this fills most of a standard rack's rear rail vertically — measure your cabinet's 0U mounting channel clearance before assuming it'll fit alongside other vertical PDUs.

This is the right PDU for a colo or enterprise server room rack running mixed C13/C19 gear where you want SNMP-based remote outlet switching and branch-circuit fault isolation in one 0U unit, not a home-lab or single-server closet where a basic strip would do.