4.2" Black and White ePaper

Part Number: CFAP400300B1-0420

This crisp, high-contrast black and white ePaper display is perfect for long-term displays with low power requirements. At 4.2 inches, it's perfect for a small sign - show daily specials, the weather forecast, product information, etc. Once the display is updated, all power connections can be removed and the graphic will remain on the display with zero power! Read more about how ePaper displays work on our blog.

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

Adapter / Breakout Board

Want to get this display up and running quickly with an Arduino or Seeeduino? Our ePaper Adapter Board makes connecting this ePaper simple and fast. Or, check out our complete kits below.

*This epaper display DOES NOT support partial updates.

This part replaces CFAP400300B0-0420, and is identical to the previous version with the exception that the controller chip requires resetting three times prior to initialization to ensure expected behavior.

Quantity Price
1 $33.27
10 $27.05
20 $26.15
50 $25.27
100 $24.90
200 $24.73
500 $24.54
1000 * $24.37
* Pricing is subject to change. Contact us about potential lead times.
Components worth considering
4518 ePaper Adapter Board
Faster development $11.68 ea.
4626 24 Position, 0.5mm Pitch, Gold, FCC FPC ZIF Connector
Add 5 ZIF Connectors $0.97 ea.
Need a written quote? Add to cart, then enter your email address in the "request a quote" box.

Part Change Notices

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Video Demonstrations

See how this ePaper looks and works.


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 4.2"
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 14g
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


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 6s
Time Between Updates 180s

Additional Options

Add this display to a breakout board or a complete development kit to speed up prototyping.

400x300 ePaper with Breakout board
Part Number: CFAP400300B1-E2-1

This kit includes the 4.2" black and white ePaper and the ePaper adapter board for quick and easy wiring. This combo is perfect for demonstrating functionality, or for simplifying the design of your project.

We provide demonstration code for 3.3v Arduino Uno compatible devices and other resources in the files section in the right sidebar.

Quantity 1 5 10 20 50 100 200 300 500 1000 *
Price $45.16 $39.64 $38.61 $37.29 $36.00 $35.47 $35.21 $34.95 $34.68 $31.56
400x300 ePaper Development Kit
Part Number: CFAP400300B1-E2-2

This is a full development kit for the 4.2 inch black and white ePaper display. It includes everything needed to see the 4.2" Black & White ePaper running:

Quantity 1
Price $70.25
For reference only. For design purposes, please use the specifications in the datasheet.