SDC 923P vs Ubiquiti UA-G3-FLEX-B: Specification Comparison
Both the SDC 923P and Ubiquiti UA-G3-FLEX-B are wired, wall-mounted access control readers with integrated 12-button keypads, making them legitimate cross-shop candidates for installations requiring multi-factor door entry. The SDC unit combines HID proximity and PIN credential modes over OSDP, while the Ubiquiti unit layers NFC, Bluetooth 4.1, Mifare, Apple Touch Pass, and PIN over a PoE Ethernet connection managed through a UniFi controller. This comparison evaluates credential breadth and platform fit, power and environmental resilience, and form factor alongside deployment integration.
In This Guide
- Which reader supports the credential types and access platform your deployment requires?
- How do the two readers compare on power requirements and environmental operating range?
- Which reader integrates more readily with enterprise panel infrastructure, and what certifications apply?
- Which should you choose: the 923P or the UA-G3-FLEX-B?
- Side-by-Side Specs
- FAQ
Which reader supports the credential types and access platform your deployment requires?
The SDC 923P supports HID proximity cards combined with a 12-key illuminated, moisture-resistant keypad, communicating over OSDP to an enterprise access control panel. It holds up to 500 user profiles onboard. OSDP compatibility positions it firmly in the traditional enterprise access control ecosystem—any OSDP-capable panel (Lenel, Software House, Mercury, etc.) can drive it natively. Credential expansion beyond HID proximity is not documented in the supplied specs.
The UA-G3-FLEX-B supports NFC, Bluetooth 4.1, Mifare, Apple Touch Pass, and a 12-button capacitive PIN keypad. Mobile unlock is confirmed for both iOS and Android via NFC. The reader connects via a single RJ45 Ethernet port and is managed through the Ubiquiti UniFi Access application controller. It is NDAA compliant per the supplied specs. Maximum user capacity is not stated in the provided specifications.
How do the two readers compare on power requirements and environmental operating range?
The SDC 923P requires up to 30 VDC supplied over conventional wired cabling. It carries no PoE specification in the provided data, meaning a separate power run or power supply is required. Its operating temperature range is -4°F to +140°F (-20°C to +60°C), and its die-cast metal housing is described as suitable for both indoor and outdoor deployment. Weight is 1.65 lbs with dimensions of 1¾"W × 7½"H × 1¾"D.
The UA-G3-FLEX-B is powered by PoE 802.3af at 5W, accepting 44–57V DC over the same single RJ45 cable that carries data, eliminating a separate power run entirely. Its operating temperature range is -30°C to +60°C (-22°F to +140°F), extending 10°C lower than the 923P on the cold end. The enclosure is polycarbonate, glass, and aluminium alloy, rated for outdoor use. Weight is 0.40 lbs. Specified dimensions in the provided data (84" × 84" × 40.8") appear inconsistent with a door reader form factor and should be verified against the manufacturer datasheet before installation planning.
Which reader integrates more readily with enterprise panel infrastructure, and what certifications apply?
The SDC 923P communicates via OSDP, the open supervised device protocol that is the current industry standard for reader-to-panel communication. This makes it compatible with enterprise-grade panels from all major access control vendors that support OSDP. No wireless management, app controller, or cloud dependency is introduced. The 923P carries a lifetime warranty, which is the stronger warranty statement of the two units based on provided specs.
The UA-G3-FLEX-B is managed exclusively through the Ubiquiti UniFi Access application and requires a UniFi Access controller in the infrastructure. It does not expose an OSDP interface per the provided specifications, meaning it cannot be dropped into a legacy enterprise panel environment without replacing the head-end. Certifications listed are CE, FCC, IC, UL 294, and CAN/ULC-60839-11-1. The UA-G3-FLEX-B is confirmed NDAA compliant. The SDC 923P has no certification or NDAA compliance data in the supplied specs.
Which should you choose: the 923P or the UA-G3-FLEX-B?
Our take: The 923P is the stronger choice when the existing infrastructure is built around a third-party enterprise access control panel using OSDP, HID proximity credentials, and a need for up to 500 onboard user profiles, particularly in environments where a separate low-voltage power supply is already planned. The UA-G3-FLEX-B is the stronger choice when the deployment runs on the Ubiquiti UniFi Access ecosystem and requires broader mobile credential support—NFC, Bluetooth 4.1, Mifare, and Apple Touch Pass versus HID proximity only on the 923P—or where a single PoE cable replacing a separate power run simplifies conduit. The UA-G3-FLEX-B also extends 10°C further on the cold end (-30°C vs -20°C), relevant in unheated vestibules or northern climates. The 923P carries a lifetime warranty against an unspecified manufacturer warranty on the Ubiquiti unit. Platform lock-in is the decisive qualifier: the UA-G3-FLEX-B cannot serve a non-UniFi panel environment per available specs.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | SDC 923P | Ubiquiti UA-G3-FLEX-B |
|---|---|---|
| Product Type | Narrow Keypad + Proximity Reader | NFC Keypad Reader |
| Credential Types | HID Proximity + PIN | NFC, Bluetooth 4.1, Mifare, Apple Touch Pass, PIN |
| Communication Protocol | OSDP | Wired Ethernet (UniFi controller) |
| Keypad | 12-key illuminated, moisture-resistant | 12-button capacitive |
| Power Input | Up to 30VDC (separate power run) | PoE 802.3af, 44–57V DC |
| Power Consumption | — | 5W |
| Network Port | — | (1) 10/100 MbE RJ45 |
| Operating Temp (Low) | -20°C (-4°F) | -30°C (-22°F) |
| Operating Temp (High) | +60°C (+140°F) | +60°C (+140°F) |
| Max User Profiles | 500 | — |
| Housing Material | Die-cast metal | Polycarbonate, glass, aluminium alloy |
| Environment Rating | Indoor/Outdoor | Outdoor (weatherproof) |
| NDAA Compliant | — | ✓ |
| Certifications | — | CE, FCC, IC, UL 294, CAN/ULC-60839-11-1 |
| Warranty | Lifetime | Manufacturer Warranty (duration not specified) |
| Weight | 1.65 lbs | 0.40 lbs |
Frequently Asked Questions
Which should you choose: the 923P or the UA-G3-FLEX-B?
The 923P is the stronger choice when the existing infrastructure is built around a third-party enterprise access control panel using OSDP, HID proximity credentials, and a need for up to 500 onboard user profiles, particularly in environments where a separate low-voltage power supply is already planned. The UA-G3-FLEX-B is the stronger choice when the deployment runs on the Ubiquiti UniFi Access ecosystem and requires broader mobile credential support—NFC, Bluetooth 4.1, Mifare, and Apple Touch Pass versus HID proximity only on the 923P—or where a single PoE cable replacing a separate power run simplifies conduit. The UA-G3-FLEX-B also extends 10°C further on the cold end (-30°C vs -20°C), relevant in unheated vestibules or northern climates. The 923P carries a lifetime warranty against an unspecified manufacturer warranty on the Ubiquiti unit. Platform lock-in is the decisive qualifier: the UA-G3-FLEX-B cannot serve a non-UniFi panel environment per available specs.
Can I use the UA-G3-FLEX-B with my existing Lenel or Software House access panel?
Based on the provided specifications, the UA-G3-FLEX-B is managed through the Ubiquiti UniFi Access application and does not list OSDP or Wiegand output as supported interfaces. The SDC 923P communicates over OSDP and is specified as compatible with enterprise access panels. If your head-end is a third-party panel, the 923P is the appropriate choice based on available specs; verify UA-G3-FLEX-B panel compatibility with Ubiquiti directly before specifying it for a non-UniFi environment.
Which reader is better suited for cold outdoor locations like a parking garage or loading dock?
The UA-G3-FLEX-B is rated to -30°C (-22°F) versus the SDC 923P's lower limit of -20°C (-4°F), giving the Ubiquiti unit a 10°C advantage at the cold end. Both share the same upper limit of +60°C. For installations in climates that regularly drop below -20°C, the UA-G3-FLEX-B's rated range extends further. Note that the 923P's die-cast metal housing is described as outdoor-capable, but confirm the -20°C floor against your site's design temperature.
Is the 923P or UA-G3-FLEX-B better for larger deployments with many users?
The SDC 923P specifies a maximum of 500 user profiles. The UA-G3-FLEX-B does not include a user capacity figure in the provided specifications. For deployments where profile count is a constraint, the 923P's 500-profile ceiling is a documented limit to compare against your head count; for the UA-G3-FLEX-B, consult Ubiquiti's UniFi Access controller documentation for its user capacity ceiling, as it cannot be confirmed from the specs provided here.
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