ACR3901U-S1 ACS Secure Bluetooth® Contact Card Reader combines the latest technology in the world of smart card readers with Bluetooth® connectivity. This compact and wireless smart card reader brings together sophisticated technology with fresh design to meet different requirements in various smart card based applications using Bluetooth-enabled devices such as smart phones and tablets.

ACR3901U-S1 supports ISO 7816 Class A, B, and C smart cards (5 V, 3 V, and 1.8 V) and most memory cards in the market, including microprocessor cards with T=0 and T=1 protocol. ACR3901U-S1 has both USB Full Speed and Bluetooth 4.0 interface for smart cards. It has a read/write speed of up to 600 Kbps. With its compact design and rechargeable Lithium-ion battery, ACR3901U-S1 is extremely portable and convenient for use anytime, anywhere.

ACR3901U-S1 offers in-field firmware upgrade to help the user cope with the fast-changing technology utilized by different applications. With this feature, stakeholders will be able to save valuable cost and time and provide utmost convenience to users.

ACR3901U-S1 uses Bluetooth® technology that allows easy integration without employing any physical connection to any terminal. Equipped with AES-128 encryption algorithm, it supports devices running on Android™ 4.3 and above, iOS 8.0 and above, Windows®, and Mac OS®.

ACR3901U-S1 is PC/SC and CCID-compliant, making it easy to install and use in any computer-based environment. Its drivers are compatible with the Windows® operating system, Linux®, and Mac OS®.

With its numerous features, the ACR3901U-S1 is the perfect smart card reader for your smart card solution.

Should you wish to try out the demo apps for ACR3901U-S1, please download the app from Google Play and App Store.

Mobile PC-Linked Bluetooth Battery Powered Single Contact Card Slot Firmware Upgradeable
  • Bluetooth® Interface
  • USB 2.0 Full Speed Interface
  • Power Source
    • Battery-Powered (incorporates a Litium-ion battery rechargeable through Micro-USB port)
    • USB-Powered (through PC-linked mode)
  • CCID Compliance
  • Smart Card Reader:
    • Contact Interface:
      • Supports ISO 7816 Class A, B, and C (5 V, 3 V, 1.8 V) cards
      • Supports microprocessor cards with T=0 or T=1 protocol
      • Supports memory cards
      • Supports PPS (Protocol and Parameters Selection)
      • Features Short-Circuit Protection
      • Supports AES-128 encryption algorithm
  • Built-in Peripheral:
    • Three single-color LEDs
  • Application Programming Interface:
    • Supports PC/SC
    • Supports CT-API (through wrapper on top of PC/SC)
  • USB Firmware Upgradeability
  • Supports Android™ 4.3 and later
  • Supports iOS 8.0 and later
Physical Characteristics
Dimensions (mm) 94 mm (L) × 60 mm (W) × 12 mm (H)
Weight (g) 30.8 g (59.7 g with cable ± 5 g tolerance)
Bluetooth Interface
Protocol Bluetooth® (Bluetooth Low Energy / Bluetooth 4.0)
Power Source Rechargeable Lithium-ion Battery (charging through USB)
Speed 1 Mbps
USB Interface
Protocol USB CCID
Connector Type Micro-USB
Power Source From USB port
Speed USB Full Speed (12 Mbps)
Cable Length 1 m, Detachable
Contact Smart Card Interface
Number of Slots 1 Full-sized Card Slot
Standard ISO 7816 Parts 1-4, Class A, B, C (5 V, 3 V, 1.8 V)
Protocol T=0; T=1; Memory Card Support
Built-in Peripherals
LED 3 single-colors: Red, Blue and Green
Other Features
Encryption In-device AES encryption algorithm
Firmware Upgrade Supported
Certifications/Compliance
Certifications/Compliance EN 60950/IEC 60950
ISO 7816
USB Full Speed
Bluetooth®
EMV™ Level 1 (Contact)
PC/SC
CCID
CE
FCC
RoHS
REACH
VCCI (Japan)
MIC (Japan)
Microsoft® WHQL
Device Driver Operating System Support
Device Driver Operating System Support Windows®
Linux®
MAC OS® 10.7 and later
Android™ 4.3 and later
iOS 8.0 and later
Drivers for ACR3901U-S1
Bluetooth Interface OS Support
MSI Installer for PC/SC Driver  15.43 MB
Version 2.3.0.0
18-Dec-2019
Windows® 7, Windows® 8, Windows® 8.1, Windows® 10, Windows® 11
iOS BLE EVK (SmartCardIO)  3.11 MB
Version 0.53
03-Jan-2022
iOS 9.0 and above
*With Extended APDU Support
Android BLE EVK (SmartCardIO)  2.00 MB
Version 0.54
11-Jul-2022
Android 4.4 and above *With Extended APDU Support
USB Interface OS Support
PC/SC Driver Package  3.17 MB
Version 1.1.10
04-Aug-2023
Linux ®
PC/SC Driver Package  484.51 KB
Version 1.1.10
01-Aug-2023
Linux®, Mac OS® X
Android EVK  1.56 MB
Version 1.1.6
18-Jan-2024
Android™ 3.1 or above
Android EVK  1.56 MB
Version 1.1.6
21-Dec-2023
Android™ 3.1 and above
MSI Installer for PC/SC Driver  3.65 MB
Version 4.4.2.0
21-Nov-2022
Windows 7 x86,Windows 7 x64,Windows 8 x86 Windows 8 x64,Windows 8.1 x86,Windows 8.1 x64,Windows 10 x86,Windows 10 x64,Windows 11 x64,Windows Server 2008 R2 x64,Windows Server 2012 x64,Windows Server 2012 R2 x64,Windows Server 2016 x64,Windows Server 2019 x64, Windows Server 2022 x64
PC/SC Driver Installer  283.03 KB
Version 1.1.10
04-Aug-2023
Mac OS® X 10.7 or above
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))
CT-API Library  2.04 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, Windows® 11
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



Manuals & Datasheets for ACR3901U-S1
Product Presentation

Product Presentation of the ACR3901U-S1 ACS Secure Bluetooth® Contact Card Reader

Technical Specification

Technical Specification of the ACR3901U-S1 ACS Secure Bluetooth® Contact Card Reader

Reference Manual

Reference Manual of the ACR3901U-S1 ACS Secure Bluetooth® Contact Card Reader

User Manual

User Manual of the ACR3901U-S1 ACS Secure Bluetooth® Contact Card Reader

User Guide (iOS)

User Guide for ACS SmartAccess app (iOS)

User Guide (Android)

User Guide for ACS SmartAccess app (Android)