In order to keep this display in production over the long term, we have revised it to the CFAP400300B1-0420. Any backorders placed now will be fulfilled with the new part when it becomes available. Please contact with any questions.

4.2" Black & White ePaper Display

Part Number: CFAP400300B0-0420

Crisp, high-contrast, 4.2" Black & White ePaper Display. Perfect for when you need to show something for a long time (think shelf labels or signage) while using minimal power. Once this display is updated, you can remove all power connections and it will continue to display indefinitely! With ZERO power! Read more about how ePaper displays work on our blog.

Use our free ePaper software to prepare your bitmap image for this display.

Adapter / Breakout Board
Want to get this display up and running quickly with an Arduino or Seeeduino? We have this ePaper Adapter Board that makes connecting our ePaper simple and fast or check out our complete kits below

*This epaper display DOES NOT support partial updates


Physical Characteristics

Column Dots x Row Dots 400 x 300
Module Overall width height depth
millimeters 91 77 1.18
inches 3.583 3.031 0.046
*width / height does not include Foldable Tab
Diagonal Dimension 4.17"
Active Area width height
millimeters 84.8 63.6
inches 3.339 2.504
Dot Pitch width height
millimeters 0.212 0.212
inches 0.0083 0.0083
Optional Connectors CS050Z24GA0
Flexible Cable (FFC/FPC) length
millimeters 18.5
inches 0.728
Weight 16g
Pin Count 24

Optical Characteristics

Glass Type ePaper
View Angle Ultra-Wide°
Foreground Color Black
Background Color White

Electrical Specifications

Supply Voltage for Logic Minimum 2.3V
Supply Voltage for Logic Maximum 3.6V
Supply Voltage for Logic Typical 3.3V
Supply Current Minimum 0.005mA
Supply Current Maximum 8mA
Module Connector Pitch 0.5mm


Operating Temperatures min max
Celsius 50°
Fahrenheit 32° 122°
Storage Temperatures min max
Celsius -25° 70°
Fahrenheit -13° 158°
Humidity min max
Non-condensing 40% 70%


Interface SPI


Foldable Tab Yes
Full Screen Update Time 3s
Time Between Updates 180s

Part Change Notice

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Part Change Notice #11081: Part Number Change

Product Affected: CFAP400300B0-0420
Date Issued: March 26, 2021
Summary: Part Number Change
Description: The part number is changing to CFAP400300B1-0420. The only difference between the two parts is the controller reset sequence is slightly different. The CFAP400300B1-0420 needs to be reset three times instead of one.
Reason: The controller for the display has shown to sometimes exhibit errors if it is not reset using the new sequence.
Availability: The CFAP400300B1-0420 is available now. Contact for pricing and lead time.
For reference only. For design purposes, please use the specifications in the datasheet.