Ubiquiti UAP-AC-HD-US vs Ubiquiti UK-ULTRA: Specification Comparison
Both the Ubiquiti UAP-AC-HD-US and the UK-ULTRA are 802.11ac (Wi-Fi 5) dual-band wireless access points sold under the Ubiquiti brand for outdoor deployment. The UAP-AC-HD-US is a high-density ceiling/wall-mount unit targeting dense client environments with MU-MIMO Wave 2 capability and dual Ethernet ports, while the UK-ULTRA is a compact pole-mount AP designed for harsh outdoor sites with an IPX6 enclosure and ultra-low power draw. Buyers evaluating outdoor Wi-Fi infrastructure for enterprise campuses, remote sites, or utility poles would reasonably cross-shop these two units.
In This Guide
- Which AP delivers more throughput, and how does the radio specification differ?
- How do the power requirements and environmental ratings compare for outdoor use?
- What are the mounting options, port configurations, and management compatibility differences?
- Which should you choose: the UAP-AC-HD-US or the UK-ULTRA?
- Side-by-Side Specs
- FAQ
Which AP delivers more throughput, and how does the radio specification differ?
The UAP-AC-HD-US specifies an aggregate throughput of 2,533 Mbps across its dual-band radios, achieved via 802.11ac Wave 2 with MU-MIMO. The spec lists 2,533 Mbps as both speed and throughput without a per-band breakdown in the provided data.
The UK-ULTRA specifies 866.7 Mbps on 5 GHz and 300 Mbps on 2.4 GHz, for an aggregate of approximately 1,166.7 Mbps. Its WiFi standard is listed as WiFi 5 (802.11ac) without a Wave 2 or MU-MIMO designation in the provided specs. Channel bandwidth for the UK-ULTRA is documented as HT 20/40, VHT 20/40/80, and HE 20/40/80 MHz.
On raw throughput, the UAP-AC-HD-US has a meaningful advantage — its aggregate figure is more than twice that of the UK-ULTRA. Buyers requiring high client density or maximum throughput capacity should weight this dimension heavily.
How do the power requirements and environmental ratings compare for outdoor use?
The UAP-AC-HD-US requires PoE+ (802.3at, 44–57 VDC) and draws up to 90W maximum according to its datasheet spec. It carries an outdoor/weather-protected rating and operates from −10 to 70 °C (14 to 158 °F). Its enclosure material is not specified in the provided data.
The UK-ULTRA draws a maximum of 8W and runs on standard 802.3af PoE (44–57 VDC), making it compatible with a wider range of existing PoE switches without requiring PoE+ infrastructure. It is rated IPX6 (protection against powerful water jets), housed in UV-stabilized polycarbonate, and operates from −40 to 60 °C (−40 to 140 °F). It also carries a wind-loading rating of 33.2 N at 200 km/h.
The UK-ULTRA is the more demanding environmental specification: its −40 °C lower limit extends 30 °C below the UAP-AC-HD-US, its IPX6 rating is an explicit ingress-protection standard (the UAP-AC-HD-US lists only 'outdoor/weather-protected' without an IP code in the provided specs), and its 8W draw significantly reduces PoE infrastructure requirements. The UAP-AC-HD-US's 90W maximum is notably high and requires PoE+ switches throughout the deployment.
What are the mounting options, port configurations, and management compatibility differences?
The UAP-AC-HD-US supports wall, ceiling, and rack mounting with kits included, and provides two 10/100/1000 Ethernet ports — enabling wired uplink redundancy or daisy-chain deployment. It is managed via the Ubiquiti UniFi Controller and also lists third-party ONVIF compatibility in its datasheet specs.
The UK-ULTRA is designed for 1–2 inch pole mounting (25–50 mm), with a single GbE RJ45 port. It supports VLAN segmentation via 8 BSSIDs per radio. Its management method is listed as Ethernet in the provided specs; no third-party management protocol (such as ONVIF) is noted.
The UAP-AC-HD-US offers more deployment flexibility with three mounting modes and dual Ethernet ports, which support link redundancy. The UK-ULTRA is purpose-built for pole installation — a common requirement for outdoor perimeter or campus-edge deployments — and its polycarbonate/SGCC-steel mount hardware is explicitly rated for that use case. The UAP-AC-HD-US's listed ONVIF compatibility is not documented for the UK-ULTRA in the provided specs.
The UK-ULTRA is confirmed NDAA compliant per its spec data; the UAP-AC-HD-US does not carry an NDAA compliance notation in the provided specs.
Which should you choose: the UAP-AC-HD-US or the UK-ULTRA?
Our take: The UAP-AC-HD-US is the stronger choice when deploying into high-density client environments where aggregate throughput and multi-client concurrency are the primary drivers. Its 2,533 Mbps aggregate (versus 1,166.7 Mbps for the UK-ULTRA), 802.11ac Wave 2 MU-MIMO radio, dual Gigabit Ethernet ports, and flexible wall/ceiling/rack mounting suit campus courtyards, stadiums, or enterprise outdoor zones where many clients connect simultaneously. However, it requires PoE+ infrastructure (up to 90W) and operates only to −10 °C. The UK-ULTRA is the appropriate selection for harsh-environment pole-mount sites: its IPX6 rating, −40 °C lower operating limit, 8W draw on standard 802.3af switches, and confirmed NDAA compliance make it better suited for remote or utility-infrastructure deployments where power budget, installation simplicity, and environmental resilience outweigh maximum throughput.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | Ubiquiti UAP-AC-HD-US | Ubiquiti UK-ULTRA |
|---|---|---|
| WiFi Standard | 802.11ac Wave 2 | WiFi 5 (802.11ac) |
| Aggregate Throughput | 2,533 Mbps | 1,166.7 Mbps (866.7 + 300) |
| 5 GHz Throughput | Not broken out in specs | 866.7 Mbps |
| 2.4 GHz Throughput | Not broken out in specs | 300 Mbps |
| PoE Standard | PoE+ (802.3at) | PoE (802.3af) |
| Power Consumption (max) | 90W | 8W |
| Voltage Range | 44–57 VDC | 44–57 VDC |
| Operating Temperature | −10 to 70 °C | −40 to 60 °C |
| IP / Weather Rating | Outdoor/weather-protected (no IP code listed) | IPX6 |
| Ethernet Ports | (2) 10/100/1000 | (1) GbE RJ45 |
| Mount Type | Wall / Ceiling / Rack | Pole (1–2 inch / 25–50 mm) |
| Weight | 3.95 lbs (1.79 kg) | 173 g (6.1 oz) |
| Dimensions | 220 × 220 × 48.1 mm | 137 × 84 × 34 mm |
| VLAN Support | Not specified in provided specs | Yes (8 BSSIDs per radio) |
| NDAA Compliant | Not listed in provided specs | Yes |
| Certifications | CE, FCC, IC | CE, FCC, IC, Anatel |
Frequently Asked Questions
Which should you choose: the UAP-AC-HD-US or the UK-ULTRA?
The UAP-AC-HD-US is the stronger choice when deploying into high-density client environments where aggregate throughput and multi-client concurrency are the primary drivers. Its 2,533 Mbps aggregate (versus 1,166.7 Mbps for the UK-ULTRA), 802.11ac Wave 2 MU-MIMO radio, dual Gigabit Ethernet ports, and flexible wall/ceiling/rack mounting suit campus courtyards, stadiums, or enterprise outdoor zones where many clients connect simultaneously. However, it requires PoE+ infrastructure (up to 90W) and operates only to −10 °C. The UK-ULTRA is the appropriate selection for harsh-environment pole-mount sites: its IPX6 rating, −40 °C lower operating limit, 8W draw on standard 802.3af switches, and confirmed NDAA compliance make it better suited for remote or utility-infrastructure deployments where power budget, installation simplicity, and environmental resilience outweigh maximum throughput.
Can I power either AP from a standard 802.3af PoE switch?
The UK-ULTRA is rated for standard PoE (802.3af, 44–57 VDC) at 8W maximum, so it will run from most existing PoE switches. The UAP-AC-HD-US requires PoE+ (802.3at) and draws up to 90W maximum per its datasheet spec; a standard 802.3af port — which delivers a maximum of 15.4W — cannot power it.
Which unit is better suited for very cold climates or extreme outdoor conditions?
The UK-ULTRA specifies an operating temperature range of −40 to 60 °C and carries an IPX6 water-ingress rating, plus a documented wind-loading tolerance of 33.2 N at 200 km/h. The UAP-AC-HD-US specifies −10 to 70 °C and is described as outdoor/weather-protected, but no IP code is listed in the provided specs. For sub-freezing deployments or sites with heavy precipitation and high winds, the UK-ULTRA's documented ratings are more comprehensive.
Is the UAP-AC-HD-US or UK-ULTRA better for larger, denser outdoor deployments?
The UAP-AC-HD-US is designed specifically for high-density client zones, with 802.11ac Wave 2 MU-MIMO and 2,533 Mbps aggregate throughput — more than twice the UK-ULTRA's aggregate. It also provides dual Gigabit Ethernet ports to support wired uplink redundancy or daisy-chain cabling, which simplifies scaling. The UK-ULTRA's single GbE port and 866.7 Mbps 5 GHz throughput are better matched to lower-density or single-AP pole-mount locations than to high-client-count deployments.
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