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   
Dimensions 98.0 mm (L) x 65.0 mm (W) x 12.8 mm (H)
Weight 81.0g
Compliance / Certifications
  • ISO 18092, ISO 14443, ISO 7816, PC/SC, CCID, LASCOM, EN60950/IEC 60950, CE, FCC, VCCI, MIC, KC, RoHS 2, USB Full Speed, Microsoft® WHQL
Interface USB Full Speed
Operating Distance Up to 50 mm (depends on the tag type)
Supply Voltage Regulated 5V DC
Supply Current 200mA (operating)
Operating Temperature 0-50°C
Operating Frequency 13.56 MHz
Smart Card Interface Support
  • ISO14443 Type A & B
  • MIFARE
  • FeliCa
  • 4 types of NFC (ISO/IEC18092) tags
Operating System Support
  • Windows®
  • Linux®
  • Mac OS®
  • Android™ 3.1 and above
Drivers for ACR1251 OS Support
USB Interface
MSI Installer for PC/SC Driver  5 MB
Version 4.2.6.1
11-Oct-2017
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  921 KB
Version 4.2.6.0
14-Sep-2017
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 1.1.5
27-Oct-2017
Linux ®
PC/SC Driver Installer  251 KB
Version 1.1.5
23-Oct-2017
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
PC/SC Drivers  455 KB
Version 1.1.5
23-Oct-2017
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  472 KB
Version 1.1.3
31-Mar-2016
Android 3.1 and above



Manuals & Datasheets for ACR1251
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