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SKU : 38S0400

Brand : Lexmark

Monochrome Laser

Duplex (2-sided) Printing: Integrated Duplex

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With exceptional performance and secure design MS631dw delivers enhanced productivity, up to 50 pages per minute* and a toner yield up to 31,000 pages**. Fast time to first print, superior print quality and easy-to-use touch screen.


These IoT-ready devices can be remotely managed, including setup, configuration, consumables management, and diagnostics. Wireless capability gives freedom of access and remote firmware updates make it easy to upgrade the latest security features. Our mobile printing app makes it easier to monitor and manage your print jobs from remote locations, all from the touch of your phone.

Ongoing professional product support

From easy installation through a lifetime of high volumes of pages, you’ll find our devices easy to use and intuitive.  From instructional and on-product support videos to simple color-coded guidance for maintenance tasks like changing toner, make our device experience world-class.  For our managed print customers, we offer a step beyond with predictive analytics for fleet diagnostics that can help Lexmark detect and prevent potential problems before they happen.


With certifications in Energy Star®, Blue Angel, RoHS, EPEAT® Silver. Models are sustainable for today and beyond. Lexmark is an industry leader of recycled content with products using at least 39% PCR content and continual focus on improvement. This line is also engineered for Long Life and designed to last and reduce waste.

Intelligent Design

Every touch point is designed to withstand high usage while meeting accessibility standards. Steel frames support the device and provide durability to help ensure consistent long-term performance. Products are designed for long service life with long-life components and are easily serviced with few tools

Secure by design

Lexmark expertise helps customers protect their data, their device and their network. Our security ecosystem is designed to overcome the most complex data challenges. And now we’ve added the Trusted Platform Module (TPM)***, which includes on-board authentication, system integrity checks, and cryptographic capabilities to create a unique digital system fingerprint. TPM meets stringent industry and US government security standards including Common Criteria and Federal Information Processing Standard (FIPS).

Proprietary technology

We own core technology across hardware, firmware, services, and solutions, creating seamless connections designed to reduce the risk of security gaps between your document, your device and your network.

Additional information


Trusted Platform Module (TPM)

Workgroup Size

Medium Workgroup


2.8 inch (7.2 cm) Color touch screen

Media Sizes Supported

A6, Oficio, 7 3/4 Envelope, 9 Envelope, JIS-B5, A4, Legal, A5, Hagaki Card, Letter, B5 Envelope, Statement, C5 Envelope, Executive, DL Envelope, Folio, 10 Envelope

Included Paper Handling

100-Sheet Multipurpose Feeder, 250-Sheet Output Bin, Integrated Duplex, 550-Sheet Input

Standard Ports

Gigabit Ethernet (10/100/1000), Front USB 2.0 Specification Hi-Speed Certified port (Type A), USB 2.0 Specification Hi-Speed Certified (Type B), 802.11b/g/n/ac + BLE

Size (in. - H x W x D)

12.1 x 15.7 x 15.3 in.

Weight (lb.)

33 lb.

Packaged Size (in. - H x W x D)

16.6 x 18.5 x 16.9 in.

Packaged Weight (lb.)

37.8 lb.

Print Speed

Up to: Black: 50 ppm (Letter)

Print Speed Duplex

Up to: Black: 24 spm (Letter)

Time to First Page

As fast as: Black: 6 seconds

Print Resolution

Black: 1200 x 1200 dpi, 1200 IQ (1200 x 600 dpi)


2-sided: Integrated Duplex

Printable Area

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

Media Types Supported

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

Number of Paper Inputs

Standard: 2, Maximum: 5


Paper Input Capacity

Standard: 650 pages 20 lb or 75 gsm bond, Maximum: 2300 pages 20 lb or 75 gsm bond, 650 pages 20 lb or 75 gsm bond

Paper Output Capacity

Up to: Standard: 250 pages 20 lb or 75 gsm bond, Maximum: 250 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, 250-Sheet Tray, 550-Sheet Tray

Maximum Monthly Duty Cycle

Up to: 175,000 pages per month

Laser Cartridge Yields

Up to: 31,000-page Black Cartridge

Imaging Unit Estimated Yield

Up to: 75,000 pages, based on 3 average letter/A4-size pages per print job and ~ 5% coverage

Cartridge(s) Shipping with Product

5,000-page 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 GHz


Standard: 512 MB, Maximum: 512 MB

Hard Disk

Intelligent Storage Drive available

Printer Languages

PCL 5, PCLm, PCL 6 Emulation, Personal Printer Data Stream (PPDS), PostScript 3 Emulation, PDF 1.7 emulation, Direct Image

Fonts and Symbol Sets

2 PCL 5/6 bitmap fonts, 94 scalable PCL 5/6 fonts, 163 scalable PostScript fonts, 5 PPDS bitmap fonts, 39 scalable PPDS fonts

Touch Screen Display


Ethernet Network




Network Protocol Support


Network Printing Methods

FTP, Pull Printing, Thin Print, Microsoft Web Services WSD, Telnet, IPP 1.0, 1.1, 2.0 (Internet Printing Protocol)

Network Management Protocols


Network Security

SSL Cipher Configuration, SNMPv3, Certificate Management, TCP Restricted Server List, 802.1x Authentication: MD5, MSCHAPv2, LEAP, PEAP, TLS, TTLS, IPSEC Support (IPv4/IPv6), TCP/UDP Port Access Control, Security Port Lockdown

Optional Local Ports

Internal 1284-B Bidirectional Parallel, Internal RS-232C serial

Optional Network Ports

MarkNet N8230 Fiber Ethernet Print Server

Wireless Network

WEP Encryption (64- and 128-bit key), 802.1x Authentication: MD5, MSCHAPv2, LEAP, PEAP, TLS, TTLS, WPA2™ – Personal

Limited Warranty

1 Year Advanced Exchange

In the Box

Up to 75,000 pages return program imaging unit.
Worldwide Safety Stability Sheet
Worldwide Printer Setup Sheet (wordless)
Warranty Information (region / country dependent)
Power Cord (Country Dependent)
Lexmark MS631dw mono laser printer.
QR Code Setup Sheet
Worldwide Safety Information Sheet
Up to 5,000 pages starter return program toner cartridge.