Ubiquiti UK-ULTRA vs Ubiquiti UAP-AC-M-5-US: Specification Comparison
Both the Ubiquiti UK-ULTRA and the Ubiquiti UAP-AC-M-5-US are Wi-Fi 5 (802.11ac) dual-band wireless access points from the same manufacturer, targeting outdoor or mixed-environment deployments over PoE infrastructure. The UK-ULTRA is sold as a single compact pole-mount unit rated IPX6, while the UAP-AC-M-5-US is a 5-pack of dual-band APs managed via the UniFi Controller. This comparison examines radio performance and throughput, environmental and physical build, and management and power delivery across both units.
In This Guide
- Which access point delivers higher radio throughput and what Wi-Fi standard does each support?
- How do the two APs compare in environmental protection, operating temperature, and physical construction?
- How do power delivery requirements and network management differ between the two units?
- Which should you choose: the UK-ULTRA or the UAP-AC-M-5-US?
- Side-by-Side Specs
- FAQ
Which access point delivers higher radio throughput and what Wi-Fi standard does each support?
The UK-ULTRA specifies 866.7 Mbps on 5 GHz and 300 Mbps on 2.4 GHz under Wi-Fi 5 (802.11ac), with channel bandwidth options of HT 20/40, VHT 20/40/80, and HE 20/40/80 MHz. The UAP-AC-M-5-US specifies a combined throughput figure of 1,750 Mbps across dual bands under 802.11ac, but the spec sheet does not break this into per-band figures. The UAP-AC-M-5-US's 1,750 Mbps aggregate claim exceeds the UK-ULTRA's combined 1,166.7 Mbps (866.7 + 300), though per-band comparison is limited by the UAP-AC-M-5-US spec sheet omitting individual band rates. Both operate simultaneously on 2.4 GHz and 5 GHz. The UK-ULTRA additionally lists HE (High Efficiency) channel modes, which are typically associated with Wi-Fi 6 framing extensions, but the product is spec'd as Wi-Fi 5 — buyers should verify with Ubiquiti documentation before assuming Wi-Fi 6 capability.
How do the two APs compare in environmental protection, operating temperature, and physical construction?
The UK-ULTRA carries an IPX6 water-ingress rating, a UV-stabilized polycarbonate enclosure, and is spec'd for operation from −40 to 60 °C (−40 to 140 °F). Its wind-load rating is documented at 33.2 N at 200 km/h (7.5 lbf at 125 mph), and it weighs 173 g (6.1 oz) as a single unit, with dimensions of 137 × 84 × 34 mm. It is explicitly rated for a 1–2 inch pole mount.
The UAP-AC-M-5-US specifies an operating temperature of −30 to 70 °C (−22 to 158 °F), giving it a 10 °C advantage at the upper end of the range, though it loses 10 °C at the cold end versus the UK-ULTRA. No IP ingress protection rating, wind-load figure, individual unit weight, or enclosure material is provided in the supplied specs for the UAP-AC-M-5-US. Package dimensions (5.60 × 9.40 × 9.90 in) and total pack weight (3.4 lbs for five units) are given but are not per-unit physical specs. The UAP-AC-M-5-US lists wall and pole mount options.
For deployments demanding documented water and dust ingress protection or extreme cold below −30 °C, the UK-ULTRA's IPX6 rating and −40 °C floor provide spec-verified assurance that the UAP-AC-M-5-US specs do not substantiate.
How do power delivery requirements and network management differ between the two units?
The UK-ULTRA draws a maximum of 8 W and accepts 44–57 V DC via 802.3af PoE, making it compatible with standard 802.3af switches without auxiliary injectors. It is managed via Ethernet and supports 8 BSSIDs per radio with VLAN tagging. Management platform is listed as 'Ethernet' rather than a named controller application.
The UAP-AC-M-5-US uses 24 V passive PoE (pairs 4, 5+; 7, 8 return) and ships with a 24 V, 0.5 A Gigabit PoE adapter per the spec. This is non-standard passive PoE, meaning it is not directly compatible with 802.3af/at switches without the bundled adapter or a compatible passive injector — an important infrastructure consideration for installers. Management is via the UniFi Network Controller, enabling centralized firmware, roaming, and guest network management across all five units simultaneously. The spec does not state maximum per-unit wattage.
Buyers integrating into an existing 802.3af switch infrastructure can deploy the UK-ULTRA without additional injectors. The UAP-AC-M-5-US requires passive PoE infrastructure or the included adapters and delivers centralized UniFi Controller management, which the UK-ULTRA spec does not reference.
Which should you choose: the UK-ULTRA or the UAP-AC-M-5-US?
Our take: The UK-ULTRA is the stronger choice when deploying a single hardened outdoor access point on standard 802.3af PoE infrastructure in harsh environments. Its IPX6 rating and documented −40 °C cold-floor give spec-verified environmental assurance absent from the UAP-AC-M-5-US, and its 8 W / 44–57 V DC draw is directly compatible with standard managed PoE switches. The UAP-AC-M-5-US, however, claims a higher aggregate throughput of 1,750 Mbps versus the UK-ULTRA's combined 1,166.7 Mbps, and its 5-pack format with UniFi Controller management provides centralized oversight across multiple APs — a clear operational advantage for mid-scale multi-AP deployments. Its upper operating temperature ceiling of 70 °C (versus 60 °C) also suits high-heat enclosures. Buyers needing a single ruggedized pole-mount unit on standard PoE should favor the UK-ULTRA; buyers building out multi-AP sites with UniFi infrastructure should evaluate the UAP-AC-M-5-US, noting its passive PoE power requirement.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | Ubiquiti UK-ULTRA | Ubiquiti UAP-AC-M-5-US |
|---|---|---|
| Wi-Fi Standard | Wi-Fi 5 (802.11ac) | 802.11ac Dual-Band |
| Max Throughput (5 GHz) | 866.7 Mbps | — |
| Max Throughput (2.4 GHz) | 300 Mbps | — |
| Combined Throughput | 1,166.7 Mbps (combined spec) | 1,750 Mbps (aggregate spec) |
| PoE Type | 802.3af (44–57 V DC) | 24 V Passive PoE |
| Max Power Consumption | 8 W | — |
| IP Ingress Rating | IPX6 | — |
| Operating Temperature | −40 to 60 °C | −30 to 70 °C |
| Wind Load Rating | 33.2 N at 200 km/h | — |
| Unit Weight | 173 g (6.1 oz) | — (3.4 lbs total for 5-pack) |
| Unit Dimensions | 137 × 84 × 34 mm | — |
| Enclosure Material | UV-stabilized polycarbonate | — |
| VLAN / BSSID Support | Yes (8 BSSIDs per radio) | — |
| Management Platform | Ethernet | UniFi Network Controller |
| Mount Type | Pole mount (1–2 inch) | Wall; Pole |
| Pack Quantity | 1 | 5 |
Frequently Asked Questions
Which should you choose: the UK-ULTRA or the UAP-AC-M-5-US?
The UK-ULTRA is the stronger choice when deploying a single hardened outdoor access point on standard 802.3af PoE infrastructure in harsh environments. Its IPX6 rating and documented −40 °C cold-floor give spec-verified environmental assurance absent from the UAP-AC-M-5-US, and its 8 W / 44–57 V DC draw is directly compatible with standard managed PoE switches. The UAP-AC-M-5-US, however, claims a higher aggregate throughput of 1,750 Mbps versus the UK-ULTRA's combined 1,166.7 Mbps, and its 5-pack format with UniFi Controller management provides centralized oversight across multiple APs — a clear operational advantage for mid-scale multi-AP deployments. Its upper operating temperature ceiling of 70 °C (versus 60 °C) also suits high-heat enclosures. Buyers needing a single ruggedized pole-mount unit on standard PoE should favor the UK-ULTRA; buyers building out multi-AP sites with UniFi infrastructure should evaluate the UAP-AC-M-5-US, noting its passive PoE power requirement.
Can I power either access point from my existing 802.3af PoE switch?
The UK-ULTRA is spec'd for standard 802.3af PoE (44–57 V DC, 8 W max), so it will power directly from any 802.3af-compliant switch port. The UAP-AC-M-5-US requires 24 V passive PoE — it is not 802.3af compatible and ships with a 24 V, 0.5 A passive PoE adapter. Plugging a UAP-AC-M-5-US into a standard 802.3af switch without the correct adapter or injector is not supported by the supplied specs.
Is the UK-ULTRA or UAP-AC-M-5-US better for larger multi-AP deployments?
The UAP-AC-M-5-US is sold as a 5-pack managed through the UniFi Network Controller, which enables centralized configuration, firmware updates, roaming, and guest network management across all units — a meaningful operational advantage at scale. The UK-ULTRA spec lists 'Ethernet' as its management method and does not reference a controller platform, so central multi-unit management capability is not substantiated for the UK-ULTRA from the provided specs. For larger deployments already on UniFi infrastructure, the UAP-AC-M-5-US is the spec-supported choice.
Which unit is rated for more extreme outdoor conditions?
The UK-ULTRA holds an IPX6 water-ingress rating, a UV-stabilized polycarbonate enclosure, a documented wind-load of 33.2 N at 200 km/h, and operates down to −40 °C. The UAP-AC-M-5-US specs provide no IP rating, no wind-load figure, and a cold-floor of −30 °C — 10 °C warmer than the UK-ULTRA. For installations requiring documented water resistance or extreme cold operation below −30 °C, the UK-ULTRA's specs provide verified assurance that the UAP-AC-M-5-US specs do not.
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