The ACR1251U USB NFC Reader II offers advanced features such as firmware upgradeability, a SAM (Secure Access Module) slot, and support for NFC tags and devices. It is ideal for contactless applications with added security functions. Through the SAM, key diversification and mutual authentication are made possible, restricting the exposure of keys and limiting the possibility of keys being stolen. This provides a high level of security in contactless operations.

ACR1251U is suitable for any contactless smart card application such as personal identity verification, network login, online banking, and micropayment. With its enhanced NFC features, ACR1251U is also ideal for non-conventional NFC applications. Such applications include smart posters for advertising, marketing, and communication purposes.

Furthermore, ACR1251U is PC/SC-compliant, allowing interoperability across different applications and platforms. ACR1251U also supports remote post-deployment firmware update, which eliminates the need for additional hardware modification. With its compact size, trendy design and rich features, ACR1251U enables you to fully enjoy the convenience of using NFC applications.

The ACR1251U comes with an optional stand to hold the smart card reader at an optimal angle, so that users can tap contactless cards or NFC-enabled devices onto the ACR1251U with ease.

For more information, click here to download the brochure of this special accessory.

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PC-Linked USB Contactless Reader NFC Reader SAM Slot(s) Firmware Upgradeable
  • USB 2.0 Full Speed Interface    
  • CCID Compliance    
  • USB Firmware Upgradability    
  • Smart Card Reader:    
    • Read/Write speed of up to 424 kbps    
    • Built-in antenna for contactless tag access, with card reading distance of up to 50 mm (depending on tag type)    
    • Supports ISO 14443 Type A and B cards, MIFARE, FeliCa, and all 4 types of NFC (ISO/IEC 18092) tags
    • Supports MIFARE 7-byte UID, MIFARE Plus and MIFARE DESFire
    • Built-in anti-collision feature (only one tag is accessed at any time)  
    • One ISO 7816-compliant SAM slot
  • Application Programming Interface    
    • Supports PC/SC    
    • Supports CT-API (through wrapper on top of PC/SC)    
  • Built-in Peripherals:    
    • User-controllable bi-color LED    
    • User-controllable buzzer    
    • SAM Slot   
Physical Characteristics
Dimensions (mm) 98.0 mm (L) x 65.0 mm (W) x 12.8 mm (H)
Weight (g) 81 g
USB Interface
Protocol USB CCID
Connector Type Standard Type A
Power Source From USB port
Speed USB Full Speed (12 Mbps)
Cable Length 1.0 m, Fixed
Contactless Smart Card Interface
Standard ISO/IEC 18092 NFC, ISO 14443 Type A & B, MIFARE®, FeliCa
Protocol ISO 14443-4 Compliant Card, T=CL 
MIFARE® Classic Card, T=CL 
ISO18092, NFC Tags 
FeliCa
SAM Card Interface
Number of Slots 1 Standard SIM-sized Card Slot
Standard ISO 7816 Class A, B, C (5 V, 3 V, 1.8 V)
Protocol T=0; T=1
Built-in Peripherals
LED 1 bi-color: Red and Green
Buzzer Monotone
Other Features
Firmware Upgrade Supported
Certifications/Compliance
Certifications/Compliance EN 60950/IEC 60950
ISO 18092
ISO 14443
ISO 7816 (SAM Slot)
USB Full Speed
PC/SC
CCID
Felica Performance Certification
J-LIS (Japan)
VCCI (Japan)
MIC (Japan)
KC (Korea)
Microsoft® WHQL
CE
FCC
RoHS 2
REACH
Device Driver Operating System Support
Device Driver Operating System Support Windows® CE
Windows®
Linux®
MAC OS®
Solaris
Android™
Drivers for ACR1251U
USB Interface OS Support
MSI Installer for PC/SC Driver  5 MB
Version 4.2.8.0
20-Mar-2018
Windows® XP, Windows® Vista, Windows® 7, Windows® 8, Windows® 8.1, Windows® 10, Windows® Server 2003, Windows® Server 2008, Windows® Server 2008 R2, Windows® Server 2012, Windows® Server 2012 R2, Windows® Server 2016 R2
MSI Installer for PC/SC Driver  5 MB
Version 4.0.6.0
14-Nov-2014
Windows® 7 (for users who did not install required Microsoft Windows Updates and get driver signature error (Code 52))
PC/SC Drivers  956 KB
Version 4.2.8.0
20-Mar-2018
Windows® XP, Windows® Vista, Windows® 7, Windows® 8, Windows® 8.1, Windows® 10, Windows® Server 2003, Windows® Server 2008, Windows® Server 2008 R2, Windows® Server 2012, Windows® Server 2012 R2, Windows® Server 2016 R2
PC/SC Drivers  371 KB
Version 2.0.1.0
23-Nov-2015
Windows® CE 5.0, Windows® CE 6.0, Windows® CE 7.0
PC/SC Driver Package  2 MB
Version 1.1.6
30-Oct-2018
Linux ®
PC/SC Driver Installer  256 KB
Version 1.1.6.3
11-Apr-2019
Mac 10.5, Mac 10.6, Mac 10.7, Mac 10.8, Mac 10.9, Mac 10.10, Mac 10.11, Mac 10.12. Mac 10.13, Mac 10.14
PC/SC Drivers  457 KB
Version 1.1.6
29-Oct-2018
Linux®, Mac OS® X
CT-API Library  2 MB
Version 1.0.1.1
23-Jan-2017
Windows® XP, Windows® Server 2003, Windows® Vista, Windows® Server 2008, Windows® Server 2008 R2, Windows® 7, Windows® 8, Windows 8.1, Windows® Server 2012, Windows® Server 2012 R2, Windows® 10
CT-API Library  261 KB
Version 1.0.1
23-Jan-2017
Linux®, Mac OS® X 10.5, Mac OS® X10.6, Mac OS® X10.7, Mac OS® X10.8, Mac OS® X10.9
Android EVK  421 KB
Version 1.1.5
25-Jun-2019
Android™ 3.1 and above



Manuals & Datasheets for ACR1251U
Product Presentation

Product Presentation of ACR1251 USB NFC Reader II

Technical Specification

Technical Specification of ACR1251 USB NFC Reader II

Application Programming Interface

Application Programming Interface of ACR1251 USB NFC Reader II