The APC AP7921B is a network-managed, horizontal 1U rack PDU for infrastructure that needs independent remote control of eight C13 outlets. Its key buying condition is electrical compatibility: it requires 200–240 V power through a C20 input, so it is not a general-purpose household power strip. It is worth considering when remote outlet reboots and rack-level management justify the extra complexity; otherwise, a simpler PDU may be a better fit.
APC AP7921B specifications at a glance
| Specification | AP7921B |
|---|---|
| Form factor | Horizontal 1U rack PDU |
| Permissible input voltage | 200–240 V |
| Input connector | IEC 60320 C20 |
| Outlets | Eight IEC 60320 C13 |
| Load capacity | 3,680 VA; Schneider also specifies 3.7 kW at 230 V and 3.3 kW at 208 V |
| Line-rated output | 16 A |
| Metering accuracy | ±5% amp metering accuracy, advertised by Schneider Electric |
These electrical specifications are listed on Schneider Electric’s product page and its current marketplace listing. Confirm the rating and connector requirements for the exact regional unit before ordering; the listed capacity does not make the PDU compatible with a lower-voltage circuit.
What makes the AP7921B a switched PDU?
Independent control of all eight outlets
Each C13 outlet can be switched independently. Schneider says, “On/off outlet switching enable users to reboot connected equipment remotely.” This is useful when a server, network device, or other rack component becomes unresponsive but remains powered: an administrator can cycle that device’s outlet without interrupting every other device on the PDU. The ServeTheHome review likewise notes that each port can be independently power cycled.
Monitoring and management
The unit provides amp metering, with Schneider advertising ±5% accuracy, and supports management through EcoStruxure IT and other platforms. ServeTheHome reports a front LCD amp display, plus Ethernet and serial ports. The combination supports both local status checks and network-based management, though available features and setup depend on the management environment.
#1 Best Overall
- Remote management capabilities. Full featured network management interfaces that provide standards based management via web, SNMP, and telnet.
- Remote individual outlet control.
- Power delays. Allows users to configure the sequence in which power is turned on or off for each outlet.
- Alarm thresholds. Define alarm thresholds in order to avoid overloaded circuits. Network and Visual alarms inform the user of possible problems
- Local current monitoring display. The aggregate current draw per power distribution unit is displayed on the unit via a digital display.
Rack fit and included hardware
The AP7921B occupies one horizontal rack unit, so it fits a rack layout with a free 1U horizontal position. It is not a zero-U vertical PDU; compare its placement with your rack’s available space and cable routing before buying.
ServeTheHome’s 2021 review reports that the package includes rack-mount ears, a cable tie-down bar, and a 2.5 m locking C19-to-C20 input cable. The locking connector is intended to reduce the risk of accidental disconnection during rack work. Schneider’s current listing also specifies a 2.5 m cable.
Rank #2
![APC Rack PDU, Switched, 1U, 15A, 100/120V, [8] 5-15, Power Distribution Unit Included, AP7900B](https://m.media-amazon.com/images/I/31OTnLVSSvL._SL160_.jpg)
- 120V Input, Switched Single-Phase 15A rackmount Power Distribution Unit
- Input: NEMA 15-15P (1.4 kW)
- Output Receptacles: Eight (8) 5-15 Outlets
- 1U Horizontal Mounting PDU
- Cord Length: 11.8inches
Check electrical and outlet compatibility before buying
- Power source: Verify the rack provides 200–240 V. The specifications include a 16 A line-rated output and distinguish 3.7 kW at 230 V from 3.3 kW at 208 V; do not assume the higher figure applies at every supported voltage.
- Input connection: Plan for the PDU’s C20 input and the required C19-to-C20 connection. Check that the facility-side supply matches the cable and local electrical requirements.
- Device leads: The outlets are C13. Confirm that connected equipment can use IEC C13-compatible power leads.
- Rack space: Reserve horizontal 1U space and allow room for the input cable and connected power leads.
- Network management: Check that Ethernet or serial access and the intended management platform suit your setup. Schneider’s current page shows lifecycle-service entries and a one-year Secure Network Management Card subscription; check local terms, availability, and any renewal requirements before purchase.
Is the AP7921B worth it?
The APC AP7921B switched rack PDU makes the most sense in an infrastructure rack where remote outlet control has operational value—for example, where staff need to reboot individual devices without visiting the rack. Its metering and management interfaces add capabilities that simpler, non-networked PDUs do not provide, but also make electrical fit, management needs, and installation planning important parts of the purchase decision.
ServeTheHome reviewer Eric Smith published a review on May 3, 2021, describing the AP7921B as a product used in several of the publication’s lab racks. The review awarded it 9.1/10 overall: 9.5 for design, 9.0 for performance, 9.2 for features, and 8.5 for value. That assessment supports its infrastructure use case, but it is a review score from 2021, not a current price or availability judgment. Regional stock, pricing, warranty coverage, and subscription terms should be checked with a local seller and Schneider Electric.
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- Network management
Rank #4
Rank #3
- Model Number:AP7921B
- Type:Module
- Condition: Sealed in box
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