Ubiquiti B-DB-AC-US vs Ubiquiti UK-ULTRA: Specification Comparison
Both the Ubiquiti B-DB-AC-US and the Ubiquiti UK-ULTRA are outdoor-rated, dual-band 802.11ac (WiFi 5) PoE-powered wireless access points sharing identical 8W power budgets and the same general deployment context — distributed outdoor wireless coverage. This comparison examines where each product's industrial design, environmental protection, RF throughput, and mounting approach make it the better fit for a specific installation scenario, drawing exclusively from published specifications for each unit.
In This Guide
- Which AP delivers more usable RF throughput and how do their radio specs differ?
- How does each AP's environmental hardening and physical form factor affect deployment site selection?
- Do the two APs differ in how they are powered, mounted, and managed in the field?
- Which should you choose: the B-DB-AC-US or the UK-ULTRA?
- Side-by-Side Specs
- FAQ
Which AP delivers more usable RF throughput and how do their radio specs differ?
The B-DB-AC-US is specified as an 802.11ac Dual-Band unit (2.4 GHz + 5 GHz) with a bullet form factor, but its published specs do not include explicit per-band throughput figures. Its modulation table fields are present in the data but the actual throughput values are absent from the provided specification set.
The UK-ULTRA provides explicit throughput numbers: 866.7 Mbps on 5 GHz and 300 Mbps on 2.4 GHz. It also lists channel bandwidth support across HT 20/40, VHT 20/40/80, and HE 20/40/80 MHz — the last indicating 802.11ax-compatible channel widths even though the device is classed as WiFi 5. The UK-ULTRA supports 8 BSSIDs per radio for VLAN segmentation, and its single GbE RJ45 port is rated to carry that 866.7 Mbps ceiling. No equivalent BSSID or channel-width spec is listed for the B-DB-AC-US.
For buyers who need to size backhaul and document network capacity, the UK-ULTRA's published throughput data provides a concrete planning figure. The B-DB-AC-US's RF capability cannot be independently verified from the available specs.
How does each AP's environmental hardening and physical form factor affect deployment site selection?
The B-DB-AC-US carries a bullet form factor with an outdoor weatherproof rating and an operating temperature range of −40 to 70°C (−40 to 158°F). It specifies ESD protection of ±24 kV (Contact/Air), which is a meaningful advantage in tower, rooftop, and lightning-prone outdoor environments. No IP ingress-protection rating (IPxx) is listed in the provided specs.
The UK-ULTRA is rated IPX6, meaning it is tested for protection against powerful water jets — a defined, internationally recognized standard. Its UV-stabilized polycarbonate enclosure is explicitly called out, relevant for long-term sun exposure. Its operating temperature range is −40 to 60°C (−40 to 140°F), narrower by 10°C at the upper end compared to the B-DB-AC-US. Wind loading is specified at 33.2 N at 200 km/h (7.5 lbf at 125 mph), a structural data point the B-DB-AC-US does not publish.
For installations where water ingress is the primary concern, the UK-ULTRA's IPX6 rating is a documented specification the B-DB-AC-US cannot match from available data. For installations with extreme heat cycles above 60°C — such as enclosed metal enclosures in direct sun — the B-DB-AC-US's 70°C upper limit provides additional headroom. The B-DB-AC-US's ±24 kV ESD rating is also documented where the UK-ULTRA does not list one.
Do the two APs differ in how they are powered, mounted, and managed in the field?
Both units draw 8W maximum and are PoE-powered. The B-DB-AC-US lists a minimum power supply of 24VDC, 0.3A and references PoE 802.3af in its spec fields — though one field notes 802.3af and another references 802.3at, a discrepancy that buyers should verify against the official Ubiquiti datasheet before specifying injectors. Management is listed as UNMS (now UISP). The B-DB-AC-US supports pole clamp and wall bracket mounting; no pole diameter range is specified.
The UK-ULTRA specifies a voltage range of 44–57V DC (the standard 802.3af/at range) and explicitly calls out 802.3af compatibility in its card bullets, confirmed by the 8W draw falling within the 802.3af 15.4W budget. Pole mount diameter is specified as 1–2 inches (25–50 mm). Management is listed as Ethernet. The UK-ULTRA is also NDAA compliant — a procurement requirement for U.S. federal, state, and many municipal contracts — while no NDAA compliance claim is listed for the B-DB-AC-US.
NDAA compliance may be a non-negotiable filter in government, education, or regulated-industry deployments. The UK-ULTRA meets it; the B-DB-AC-US does not list it. Both units share the same port count (one GbE) and similar management paradigms within the Ubiquiti ecosystem.
Which should you choose: the B-DB-AC-US or the UK-ULTRA?
Our take: The UK-ULTRA is the stronger choice when documented throughput figures, a certified ingress-protection rating, NDAA compliance, and pole-mount dimensional specs are required for the installation record. Concretely: the UK-ULTRA publishes 866.7 Mbps / 300 Mbps per-band throughput where the B-DB-AC-US lists none; the UK-ULTRA holds an IPX6 water-jet rating where the B-DB-AC-US lists no IP code; and the UK-ULTRA is NDAA compliant where the B-DB-AC-US is not listed as such. The B-DB-AC-US holds two advantages from available specs: a wider upper operating temperature (70°C vs 60°C) and a documented ±24 kV ESD rating suited to lightning-exposed tower sites. Choose the B-DB-AC-US for high-heat or high-ESD environments where bullet form factor and UNMS management are already in use; choose the UK-ULTRA for IPX6-required sites, government procurement, or any deployment where published throughput figures must appear in the design document.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | Ubiquiti B-DB-AC-US | Ubiquiti UK-ULTRA |
|---|---|---|
| WiFi Standard | 802.11ac (WiFi 5) Dual-Band | WiFi 5 (802.11ac) Dual-Band |
| 5 GHz Throughput | — | 866.7 Mbps |
| 2.4 GHz Throughput | — | 300 Mbps |
| Form Factor | Bullet (outdoor weatherproof) | Compact Indoor/Outdoor AP |
| IP / Environmental Rating | Outdoor rated (no IP code listed) | IPX6 |
| Operating Temp (Range) | −40 to 70°C (−40 to 158°F) | −40 to 60°C (−40 to 140°F) |
| ESD Protection | ±24 kV Contact / Air | — |
| Power Consumption | 8W | 8W max |
| PoE Input | 802.3af listed (802.3at also referenced) | 44–57V DC (802.3af compatible) |
| Ports | 1× Gigabit Ethernet | 1× GbE RJ45 |
| VLAN / BSSID Support | — | 8 BSSIDs per radio |
| Pole Mount Diameter | — | 1–2 in (25–50 mm) |
| Wind Loading | — | 33.2 N at 200 km/h (7.5 lbf at 125 mph) |
| NDAA Compliant | — | Yes |
| Certifications | CE, FCC, IC | CE, FCC, IC, Anatel: 06237-24-08356 |
| Weight | 0.250 lb (113 g) | 173 g (6.1 oz) |
Frequently Asked Questions
Which should you choose: the B-DB-AC-US or the UK-ULTRA?
The UK-ULTRA is the stronger choice when documented throughput figures, a certified ingress-protection rating, NDAA compliance, and pole-mount dimensional specs are required for the installation record. Concretely: the UK-ULTRA publishes 866.7 Mbps / 300 Mbps per-band throughput where the B-DB-AC-US lists none; the UK-ULTRA holds an IPX6 water-jet rating where the B-DB-AC-US lists no IP code; and the UK-ULTRA is NDAA compliant where the B-DB-AC-US is not listed as such. The B-DB-AC-US holds two advantages from available specs: a wider upper operating temperature (70°C vs 60°C) and a documented ±24 kV ESD rating suited to lightning-exposed tower sites. Choose the B-DB-AC-US for high-heat or high-ESD environments where bullet form factor and UNMS management are already in use; choose the UK-ULTRA for IPX6-required sites, government procurement, or any deployment where published throughput figures must appear in the design document.
Is the B-DB-AC-US or UK-ULTRA better for government or public-sector deployments?
The UK-ULTRA is the documented choice for government and public-sector use. It lists NDAA compliance in its specifications, which is a procurement requirement for many U.S. federal, state, and municipal contracts. The B-DB-AC-US does not list NDAA compliance in the provided specifications, so it cannot be confirmed as meeting that requirement without additional vendor documentation.
Can both APs run off a standard 802.3af PoE switch without an injector upgrade?
Both units list an 8W maximum power draw, which falls within the 15.4W budget of IEEE 802.3af. The UK-ULTRA explicitly specifies a 44–57V DC input range consistent with 802.3af/at. The B-DB-AC-US lists 802.3af in one spec field and 802.3at in another — buyers should confirm the exact PoE standard against the official Ubiquiti datasheet before finalizing switch or injector selection.
Which AP is better suited for extreme-temperature outdoor enclosures or rooftop equipment cabinets?
The B-DB-AC-US specifies an upper operating temperature of 70°C (158°F), compared to 60°C (140°F) for the UK-ULTRA — a 10°C advantage that can matter inside sealed metal enclosures exposed to direct sun. Both share the same lower limit of −40°C. The B-DB-AC-US also lists ±24 kV ESD protection, relevant for rooftop and tower sites prone to electrostatic discharge; no equivalent ESD rating appears in the UK-ULTRA's published specs.
More Wireless Access Point Comparisons
Get a Second Opinion on Your Camera Choice
Share your site layout, coverage goals, and budget. Our team will validate the camera selection, flag anything we would change, and recommend products that match the use case.