Product

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.

Physical Characteristics

Column Dots x Row Dots

400 x 300

Module Overall	width	height	depth
millimeters	91	77	1.18
inches	3.58	3.03	0.05
*width / height does not include Foldable Tab

Diagonal Dimension

4.2"

Active Area	Width	Height
millimeters	84.8	63.6
inches	3.34	2.50

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
Optical Characteristics

Glass Type ePaper

View Angle Ultra-Wide°

Foreground Color Black

Background Color White
Electrical Specification
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
Environmental
Environmental

Operating Temperatures min max

Celsius 0° 50°

Fahrenheit 32° 122°

Storage Temperatures min max

Celsius -25° 70°

Fahrenheit -13° 158°

Humidity min max

Non-condensing 40% 70%
Electronics
Electronics

Interface SPI
Datasheets

picture_as_pdf
CFAP400300B1-0420 Datasheet
Files and Downloads

folder_zip Hardware Design - 3D Model
picture_as_pdf Other Document - ePaper Getting Started Guide
link Arduino Demo Code Download on Github
link Arduino Demo Code Repository on Github
Compliance Documents

picture_as_pdf Declaration of Conformity RoHS2

picture_as_pdf Declaration of Conformity REACH

Operating Temperatures	min	max
Celsius	0°	50°
Fahrenheit	32°	122°

Storage Temperatures	min	max
Celsius	-25°	70°
Fahrenheit	-13°	158°

Humidity	min	max
Non-condensing	40%	70%

Additional Options
Resources
Change Notices

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... Read More

Details

Quantity	1	10	20	50	100	200	300	500	1000 *
Unit Price	$39.64	$38.61	$37.29	$36.00	$35.47	$35.21	$34.95	$34.68	$31.56

Quantity:

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: 4.2" black and white epaper Seeeduino running ePaper demo code ePaper Adapter... Read More

Details

Quantity	1
Unit Price	$71.96

Quantity:

Additional Resources

Part Change Notice #11378: Global Demand Increasing Lead Times on ePaper Modules.

Products Affected:	CFAP200200A0-0154, CFAP104212B0-0213, CFAP104212A0-0213, CFAP128296B0-0290, CFAP128296A0-0290, CFAP122250A0-0213, CFAP128296C0-0290, CFAP128296D0-E1-2, CFAP122250A0-E1-2, CFAP122250A0-E1-1, CFAP128296C0-E1-1, CFAP128296C0-E1-2, CFAP128296D0-E1-1, CFAP176264A0-0270, CFAP176264A0-E1-1, CFAP176264A0-E1-2, CFAP104212C0-0213, CFAP104212C0-E1-1, CFAP104212C0-E1-2, CFAP152152A0-0154, CFAP152152A0-E1-1, CFAP152152A0-E1-2, CFAP200200A1-0154, CFAP176264B0-0270, CFAP640384A0-0750, CFAP400300C0-0420, CFAP104212D0-0213, CFAP400300B0-0420, CFAP104212E0-0213, CFAP600448A0-0583, CFAP176264A0-E2-1, CFAP200200A1-E2-2, CFAP176264A0-E2-2, CFAP128296E0-0290, CFAP128296E0-E2-1, CFAP128296E0-E2-2, CFAP122250A0-E2-2, CFAP122250A0-E2-1, CFAP128296C0-E2-2, CFAP152152C0-0154, CFAP152152C0-E2-1, CFAP152152C0-E2-2, CFAP152152B0-0154, CFAP152152B0-E2-1, CFAP152152B0-E2-2, CFAP128296C0-E2-1, CFAP152152A0-E2-1, CFAP152152A0-E2-2, CFAP400300A0-0420, CFAP400300A0-E2-1, CFAP400300A0-E2-2, CFAP104212C0-E2-2, CFAP104212C0-E2-1, CFAP104212D0-E2-2, CFAP104212D0-E2-1, CFAP104212E0-E2-2, CFAP104212E0-E2-1, CFAP176264B0-E2-2, CFAP176264B0-E2-1, CFAP128296D0-E2-1, CFAP128296D0-E2-2, CFAP400300C0-E2-2, CFAP400300C0-E2-1, CFAP400300B0-E2-2, CFAP400300B0-E2-1, CFAP600448A0-E2-2, CFAP600448A0-E2-1, CFAP640384A0-E2-2, CFAP640384A0-E2-1, CFAP200200A3-0154, CFAP200200A3-E2-1, CFAP200200A3-E2-2, CFAP400300B1-0420, CFAP400300B1-E2-1, CFAP400300B1-E2-2, CFAP122250A2-0213, CFAP122250A2-E2, CFAP122250A2-E2-2, CFAP200200A5-0154, CFAP104212D1-0213, CFAP200200A5-E2, CFAP200200A5-E2-2, CFAP104212D1-E2, CFAP104212D1-E2-2
Date Issued:	March 2, 2026
Summary:	Global Demand Increasing Lead Times on ePaper Modules.
Description:	Due to increased global demand for AI chips, semiconductor fabricators are prioritizing AI chip production, which is sidelining display controller manufacturing. Crystalfontz is currently experiencing extended lead times of six months or more on products utilizing EPD display controllers. We request that POs are placed well in advance and forecasts are provided to us so that we plan accordingly. We are actively monitoring the situation and working to reduce the impact this may have on customers.
Reason:	Global semiconductor fabrication capacity constraints driven by AI chip demand have significantly reduced display controller production allocations across the industry. This is an industry-wide condition outside of Crystalfontz's control.
Impact:	Extended lead times of up to six months on affected EPD products Additional display controller types may be impacted as the situation evolves Product availability is subject to change
Availability:	Contact Crystalfontz Support for up-to-date information by emailing support@crystalfontz.com. Customers who can provide purchase forecasts or updated order projections are strongly encouraged to do so.

End-Of-Life #11322: End-Of-Life with Replacement

Products Affected:	CFAP400300B1-0420, CFAP400300B1-E2-1, CFAP400300B1-E2-2
Date Issued:	February 7, 2025
Summary:	End-Of-Life with Replacement
Description:	This display is EOL and no longer available. The replacement display does require code changes to operate.
Reason:	Old technology is being replaced.
Impact:	Init code change Dimensions change
Recommendation:	Contact support@crystalfontz.com for replacement options.
Availability:	Contact Crystalfontz Support for up-to-date information by emailing support@crystalfontz.com.