HID - Omnikey 3121 USB Desktop Reader
USB Smart Card Reader

The OMNIKEY® 3121 is a high-performance, USB smart card reader for desktop use that features multiple base mounting options and a robust housing. Compliant with all industry standards, this reader is compatible with virtually any contact smart card, operating system and a variety of applications. The OMNIKEY 3121 is easy-to-install and well-suited for all contact smart card operations, including single sign-on, online-banking or digital signature applications.


  • Meets major standards including ISO 7816, EMV 2000, Microsoft WHQL, USB CCID, PC/SC, HBCI and PC-2001 Specification
  • Usage within an application is based on standardized interfaces like PC/SC, OCF or CT-API
  • Interchangeable standing base options available for both vertical and horizontal configurations
  • USB CCID support for easy integration
  • Meets GSA FIPS 201 requirements
  • Supports high speed data transmission
  • 24 Months Warranty - Return to Base


 Physical Characteristics
Dimensions80 mm x 67 mm x 28 mm
Weight141 grams(With Standard Desktop Base)
 Environmental Characteristics
Operating/Storage Temperature0 to 55 °C (10-90% Relative Humidity)
 Host Interface
USBUSB 2.0 CCID (USB 1.0 Compliant)
Transmit Speed12Mbps (USB 2.0 Full Speed)
 Smart Card Interface
StandardISO 7816
ProtocolsT=0, T=1, 2-wire: SLE 4432/42 (S=10), 3-wire: SLE 4418/28 (S=9), I2C (S=8)
Card sizeID-1 (full-size)
Smart Card Interface Speed420 kbps (when supported by card)
Smart Card Clock FrequencyUp to 8 MHz
Supported Card Types5V, 3V and 1.8V Smart Cards, ISO 7816 Class A, B and C
Power to Smart Card60 mA
Smart Card DetectionMovement detection with auto power-off
Automatic detection of smart card type
Short circuit and thermal protection
8 Pin Handling C4 / C8 supported
Embedded TechnologyOMNIKEY Smart Link Chipset
Status IndicatorDual Colour LED
Ordering Information and Pricing
Part Number Model Number Description RRP
[A] HID OMNIKEY 3121 USB Reader
9-5610-010-0 OK-3121 USB OmniKey OK-3121 USB Reader (TAA compliant) $55.00 A