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SKU : 29S0500

Brand : Lexmark

Monochrome Laser

Duplex (2-sided) Printing: Integrated Duplex

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Get output up to 42 pages per minute*, plus double-side automatic scanning, copying, faxing, touch-screen convenience and Wi-Fi, all in the compact Lexmark MX431adw.

Full-spectrum security

Lexmark’s comprehensive approach to product security is a design and engineering mandate across our entire product portfolio. Our security features help keep your information safe—in the document, on the device, over the network, and at all points in between.

Connectivity central

In addition to Ethernet and USB, built-in Wi-Fi makes it easy for mobile users to get output via the Lexmark Mobile Print app, as well as Mopria®, AirPrint and Google Cloud Print. And the Lexmark Mobile Assistant app simplifies wireless configuration.

Save paper, save energy

Automatic two-sided printing is standard, along with built-in energy-saving modes that help support ratings of EPEAT® Silver and ENERGY STAR® certified. The Lexmark Cartridge Collection Program (LCCP) and Lexmark Equipment Collection Program (LECP) minimize waste and support recycling (availability varies by country).

Versatility that fits

Measuring just 13.3 inches high x 16.2 inches wide x 14.4 inches deep (339 mm high x 411 mm wide x 366 mm deep), the business-class MX431adw fits almost anywhere. Its compact size and light weight make it easy to set up and easy to move.

Interact with ease

Take command of printing, copying, faxing, and automatic two-sided scanning with a 2.8-inch (7.2 cm) color touch screen. It not only supports convenient interaction with essential system functions and task information, but includes built-in cloud connectors to help you save scans to and retrieve files from popular cloud services Box, DropBox, Google Drive, and Microsoft OneDrive.

Print more, stop less

In addition to a first page as fast as 5.9 seconds and output up to 42 pages per minute*, available Extra High Yield Unison™ toner provides up to 20,000 pages** of output, while an optional paper tray increases total input capacity up to 900 sheets for more printing and less downtime. And with its steel frame and lifetime fuser, the MX431adw is built to last.

Additional information


Copying, Color Scanning, Printing, Network Scanning, Faxing

Workgroup Size

Small Workgroup


2.8 inch (7.2 cm) LCD touch panel

Media Sizes Supported

A6, Oficio, 7 3/4 Envelope, 9 Envelope, JIS-B5, A4, Legal, A5, Letter, Statement, Executive, Universal, DL Envelope, Folio, 10 Envelope

Included Paper Handling

100-Sheet Multipurpose Feeder, Integrated Duplex, 150-Sheet Output Bin, 250-Sheet Input

Standard Ports

100-Sheet Multipurpose Feeder, Integrated Duplex, 150-Sheet Output Bin, 250-Sheet Input

Size (in. - H x W x D)

13.3 x 16.2 x 14.4 in.

Weight (lb.)

28.2 lb.

Packaged Size

15.16 x 16.54 x 18.31 in. (H x W x D)

Packaged Weight (lb.)

32.41 lb.

Copy Speed

Up to: Black: 42 cpm (Letter)

Copy Speed Duplex

Up to: Black: 18 spm (Letter)

Time to First Copy

As fast as: Black: 5.9 seconds

Reduce / Enlarge Range

25 – 400 %

Modem Speed

ITU T.30, V.34 Half-Duplex, 33.6 Kbps

Fax Transmission Speed

< 3 seconds per page

Print Speed

Up to: Black: 42 ppm (Letter)

Print Speed Duplex

Up to: Black: 18 spm (Letter)

Time to First Page

As fast as: Black: 5.9 seconds

Print Resolution

Black: 2400 IQ (2400 x 600 dpi), 600 x 600 dpi


2-sided: Integrated Duplex

Printable Area

0.2 inches of the top, bottom, right and left edges (within)

Scanner Type / ADF Scan

Flatbed scanner with ADF, DADF (single pass Duplex)

Scan Area

8.5 x 14 inches (Maximum)

A4/Ltr Simplex Scan Speed

Up to: Black: 46 / 48 sides per minute, Color: 20 / 21 sides per minute

A4/Ltr Duplex Scan Speed

Up to: Black: 92 / 96 sides per minute, Color: 40 / 42 sides per minute

Scan Technology


Optical Scanning Resolution

up to 600 X 600 dpi (color)

Scan File Formats


Scan Destinations

e-mail, USB or Network connected computer, FTP


50-Sheet Automatic Document Feeder

ADF Paper Input Capacity / ADF Paper Output Capacity

Up to: 50 pages 20 lb or 75 gsm bond, Up to: 50 pages 20 lb or 75 gsm bond

Media Types Supported

Paper Labels, Card Stock, Plain Paper, Envelopes, Refer to the Paper & Specialty Media Guide

Finishing Option


Number of Paper Inputs

Standard: 2, Maximum: 3

Paper Input Capacity

Standard: 350 pages 20 lb or 75 gsm bond, Maximum: 900 pages 20 lb or 75 gsm bond
350 pages 20 lb or 75 gsm bond

Paper Output Capacity

Up to:
Standard: 150 pages 20 lb or 75 gsm bond, Maximum: 150 pages 20 lb or 75 gsm bond

Paper Weight Range Supported

16 – 32 lb. (Standard Tray), 16 – 58 lb. (Multipurpose Feeder)

Optional Paper Handling

550-Sheet Lockable Tray, 550-Sheet Tray

Maximum Monthly Duty Cycle

Up to: 80000 pages per month

Laser Cartridge Yields

up to:
3,000-page Cartridge, 15,000 page High Yield Cartridge, 20,000-page Black Extra High Yield Cartridge

Imaging Unit Estimated Yield

Up to:
40000 pages, based on 3 average letter/A4-size pages per print job and ~ 5% coverage

Cartridge(s) Shipping with Product

3,0004-page Black Return Program Toner Cartridge

Replacement Cartridges

Product functions only with replacement cartridges designed for use in a specific geographical region.

Processor Speed

Dual Core, 1.0 GHz


Standard: 512 MB, Maximum: 512 MB

Hard Disk

Not Available

Printer Languages

PCL 5c Emulation, PCL 5e Emulation, PCL 6 Emulation, PostScript 3 Emulation, Direct Image

Fonts and Symbol Sets

2 PCL bitmap fonts, For more information, refer to the Technical Reference., 89 scalable PostScript fonts, 3 of 9 scalable PCL 5e fonts in Narrow, Regular and Wide, 89 scalable PCL fonts

Touch Screen Display


Direct USB


Ethernet Network



Wireless Option

Network Protocol Support

TCP/IP IPv6, IPSEC w/ IPv4, IPSEC w/ IPv6, TCP/IP IPv4, ICMP, TCP, IGMP, UDP, 802.1x

Network Printing Methods

LPR/LPD, Microsoft Web Services WSD, FTP, TFTP, Enhanced IP (Port 9400), IPP 1.0, 1.1, 2.0 (Internet Printing Protocol)

Network Management Protocols

DHCP6, BOOTP, RARP6, mDNS6, IGMP6, WINS6, DDNS6, SNMPv36, SNMPv1, SNMPv2c6, Telnet6, NTP6, ICMP6, HTTP6, DNS6, ARP6, HTTPs (SSL6/TLS)6, SMTP6, Finger

Network Security

SNMPv3, 802.1x Authentication: MD5, MSCHAPv2, LEAP, PEAP, TLS, TTLS


1-Year Advanced Exchange, Next Business Day

In the Box

Setup guide or sheet (network and local attachment)
Software and documentation CD
Up to 40,000 pages** return program imaging unit
Up to 3,000 pages* return program toner cartridge
Lexmark MX431adw multifunction laser printer
Stability sheet and safety sheet or booklet
Statement of limited warranty / guarantee
Power cord(s)