HID 921PHRNEK0002D vs HID HID-920-PTNN: Specification Comparison
Both the HID 921PHRNEK0002D (RPK40 MultiCLASS SE Keypad Reader) and the HID 920-PTNN (RP40 MultiCLASS SE Proximity Reader) are wall-mount, wired access control credential readers from HID's MultiCLASS SE family, designed for physical access control systems. The core distinction is authentication modality: the 921PHRNEK0002D adds an integrated alphanumeric keypad for PIN-based or card-plus-PIN authentication, while the 920-PTNN is a card/fob/mobile-only reader with OSDP support and intelligent power management. Buyers choosing between them are primarily deciding whether PIN authentication is required at a given door.
In This Guide
- Which reader supports the credential technologies and authentication modes required at each door?
- How do the two readers integrate with access control panels and third-party platforms?
- Which reader is rated for outdoor use, and what are the power and physical considerations for each?
- Which should you choose: the 921PHRNEK0002D or the HID-920-PTNN?
- Side-by-Side Specs
- FAQ
Which reader supports the credential technologies and authentication modes required at each door?
The 921PHRNEK0002D reads HID iCLASS (13.56 MHz) and 125 kHz proximity cards, and adds an integrated alphanumeric keypad with tactile feedback, enabling card-only, PIN-only, or card-plus-PIN authentication sequences. This makes it the appropriate choice wherever two-factor authentication is a policy or compliance requirement.
The 920-PTNN reads both 13.56 MHz (high frequency) and 125 kHz (low frequency) credentials and additionally supports card fobs and HID Mobile Access-compatible mobile devices. It does not include a keypad, so authentication is credential-presentation only. Mobile access support is listed as configurable on the 920-PTNN; no equivalent mobile credential capability is specified for the 921PHRNEK0002D.
How do the two readers integrate with access control panels and third-party platforms?
The 920-PTNN explicitly supports Open Supervised Device Protocol (OSDP) over its wired interface. OSDP is an industry-standard, bidirectional, supervised protocol that enables encrypted communication and remote monitoring of reader status, and is required by many modern and government-grade access control panels.
The 921PHRNEK0002D is specified for integration with HID Access Control Systems and 'standard PACS platforms,' but no specific communication protocol (such as OSDP or Wiegand) is named in the provided specifications. Buyers deploying on panels that mandate OSDP should verify protocol compatibility for the 921PHRNEK0002D against the datasheet before specifying it.
Which reader is rated for outdoor use, and what are the power and physical considerations for each?
The 921PHRNEK0002D is specified for outdoor deployment in a polycarbonate housing, and the specs note it operates on a single conduit and single power connection per door. Dimensions are listed as 85 mm x 122 mm x 28 mm. No IP or IK rating is stated in the provided specifications.
The 920-PTNN is specified for indoor wired installation (AC/DC power) and carries a wall-switch form factor. It features intelligent power management delivering up to 59% energy reduction compared to a baseline not defined in the provided specs. It also holds Environmental Product Declaration and Green Circle certifications, relevant to LEED or sustainability-mandated projects. No outdoor rating is stated for the 920-PTNN in the provided specifications.
Which should you choose: the 921PHRNEK0002D or the HID-920-PTNN?
Our take: The 921PHRNEK0002D is the stronger choice when a door requires two-factor authentication — card plus PIN — or must serve users who present only a PIN, since it is the only model here with an integrated alphanumeric keypad. It is also the specified outdoor-rated option in a polycarbonate housing, making it appropriate for perimeter or exterior applications. The 920-PTNN is the stronger choice for interior deployments where mobile credential support (HID Mobile Access) and confirmed OSDP integration are priorities; no mobile access capability is listed for the 921PHRNEK0002D, and no specific protocol is named for it in the provided specs. The 920-PTNN's up-to-59% power reduction and sustainability certifications are additional factors for energy-conscious or LEED projects. Both carry a 2-year warranty. Platform teams standardizing on OSDP should verify the 921PHRNEK0002D's protocol support directly against its datasheet before deployment.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | HID 921PHRNEK0002D | HID HID-920-PTNN |
|---|---|---|
| Product Family | RPK40 MultiCLASS SE | RP40 MultiCLASS SE |
| SKU | 921PHRNEK0002D | HID-920-PTNN |
| Device Type | Keypad Reader | Proximity Reader (no keypad) |
| Credential: iCLASS / 13.56 MHz | Yes (iCLASS) | Yes (13.56 MHz) |
| Credential: 125 kHz Proximity | Yes | Yes |
| Credential: Fob | — | Yes |
| Mobile Access (HID Mobile Access) | — | Yes (configurable) |
| Integrated Keypad | Alphanumeric with tactile feedback | — |
| Authentication Modes | Card, PIN, or Card + PIN | Card / fob / mobile presentation |
| Communication Protocol | Not specified in provided specs | OSDP (wired) |
| Environment Rating | Outdoor (polycarbonate housing) | Indoor only |
| Power | Single conduit / single connection | AC/DC; up to 59% energy reduction |
| Form Factor | Compact wall-mount | Wall-mount switch style |
| Housing Material | Polycarbonate | Not specified in provided specs |
| Sustainability Certifications | — | Environmental Product Declaration, Green Circle |
| Warranty | 2-year | 2-year |
Frequently Asked Questions
Which should you choose: the 921PHRNEK0002D or the HID-920-PTNN?
The 921PHRNEK0002D is the stronger choice when a door requires two-factor authentication — card plus PIN — or must serve users who present only a PIN, since it is the only model here with an integrated alphanumeric keypad. It is also the specified outdoor-rated option in a polycarbonate housing, making it appropriate for perimeter or exterior applications. The 920-PTNN is the stronger choice for interior deployments where mobile credential support (HID Mobile Access) and confirmed OSDP integration are priorities; no mobile access capability is listed for the 921PHRNEK0002D, and no specific protocol is named for it in the provided specs. The 920-PTNN's up-to-59% power reduction and sustainability certifications are additional factors for energy-conscious or LEED projects. Both carry a 2-year warranty. Platform teams standardizing on OSDP should verify the 921PHRNEK0002D's protocol support directly against its datasheet before deployment.
Can the 921PHRNEK0002D or the 920-PTNN read mobile credentials from a smartphone?
Only the 920-PTNN lists mobile credential support — specifically HID Mobile Access compatibility, described as configurable. The 921PHRNEK0002D's provided specifications do not mention mobile access capability. If mobile credentials are required, the 920-PTNN is the specified option between these two.
Which reader is suitable for an outdoor entrance door?
The 921PHRNEK0002D is explicitly specified for outdoor deployment in a polycarbonate housing, with the manufacturer noting it does not require an added enclosure. The 920-PTNN is specified for indoor wired installation only. No outdoor rating is stated for the 920-PTNN in the provided specifications.
Does either reader support OSDP for encrypted, supervised communication with the access control panel?
Yes — the 920-PTNN explicitly lists Open Supervised Device Protocol (OSDP) as its communication protocol. The 921PHRNEK0002D's provided specifications reference integration with 'standard PACS platforms' but do not name a specific protocol. Installers working with panels that require OSDP should confirm the 921PHRNEK0002D's protocol support via its datasheet or with HID directly before specifying it.
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