Product

This product has reached end of life. Here's a list of ePaper modules we have available.

[EOL] 4.2" Red White Black ePaper Display

Part Number: CFAP400300A0-0420

4.2" 3-Color ePaper Display 400x300 pixels. These electrophoretic displays are perfect for electronic shelf-labels, name badges, and other products that require very little power and don't need to be refreshed very often. Read more about how ePaper displays work on our blog.

Use the ePaper adapter board, any 3.3v Arduino and our demo sketch to quickly demonstrate the operation of this super-efficient display or check out our kits below.

This free ePaper software can be used to prepare your bitmap image for this display.

*This 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	3.58	3.03	0.05
*width / height does not include Foldable Tab

Diagonal Dimension

4.17"

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	16g
Pin Count	24

Optical Characteristics
Optical Characteristics

View Angle Ultra-Wide°

Foreground Color Black / Red

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

Module Connector Pitch 0.5mm
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
CFAP400300A0-0420 Datasheet
Files and Downloads

picture_as_pdf Hardware Design - CFA10084 Schematic
link Fork this on Github
link Arduino Demo Code on Github

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%

Pin Table
Change Notices

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.

Product Update #11084: Red ePaper End-of-Life notice.

Products Affected:	CFAP128296D0-0290, CFAP176264A0-0270, CFAP104212C0-0213, CFAP152152A0-0154, CFAP176264A0-E2-1, CFAP176264A0-E2-2, CFAP152152A0-E2-1, CFAP152152A0-E2-2, CFAP400300A0-0420, CFAP400300A0-E2-1, CFAP400300A0-E2-2, CFAP128296D0-E2-1, CFAP128296D0-E2-2
Date Issued:	April 28, 2021
Summary:	Red ePaper End-of-Life notice.
Description:	These products will no longer be stocked at our facility or offered for sale on our website.
Reason:	Due to quality issues with the red ink during storage, we have determined that we will no longer offer this line of products to our customers.