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 to keep your information safe - in the document, on the device, over the network and at all points in between.

Hands-off durability
With its steel frame and lifetime fuser, the MS331dn is built to last.

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

Output that fits
Measuring just 222 mm high x 368 mm wide x 366 mm deep, the business-class MS331dn fits almost anywhere. Its compact size and light weight make it easy to set up and easy to move.

Print more, stop less
Optional High Yield Unison™ toner provides up to 15,000 pages of output, whilst an optional paper tray increases total input capacity by up to 900 sheets for more printing and less downtime.

Solid performance, flexible connectivity
Get your first page as fast as 6.2 seconds, and power through challenging jobs with a 1-GHz dual-core processor and 256 MB of memory. Connect via USB or Ethernet to give your whole team access.

Specification

Design
Market positioning	Home & office
Product colour	Black, White
Built-in display	Yes
Display	LCD
Colour display	No
Certification	ENERGY STAR, ICES-003 Class B, BSMI Class B, US FDA, UL 60950-1, FCC Class B, cUL CAN/CSA-C22.2 60950-1, NOM, CB EN/IEC 60950-1, CB EN/IEC 60825-1, CE DoC (EN 62301 Class B, EN 62311, CE EN/IEC 60950-1, CE EN/IEC 60825-1, EN 61000-3, EN 55022 Class B, EuP, EN 55024, UL), EFTA (CE), KCC, CCC, CECP, CEL, C-tick DoC, UL-AR, KC mark, UL GS mark, EC 1275, MET-I, ISO 532B, ECMA-370, TED, GOST-R, SII, TER, DE-UZ 205, China Green Product (CGP)
Features
Country of origin	China
Bitmap fonts	OCR-A, OCR-B
Printer fonts	PCL, PostScript, Scalable
Number of print cartridges	1
Printing colours	Black
Recommended duty cycle	500 - 5000 pages per month
Maximum duty cycle	50000 pages per month
Input & output capacity
Maximum output capacity	150 sheets
Maximum input capacity	900 sheets
Multi-Purpose tray input capacity	100 sheets
Multi-Purpose tray	Yes
Paper tray 1 input capacity	350 sheets
Total output capacity	150 sheets
Total input capacity	350 sheets
Total number of input trays	1
Network
Wi-Fi	No
Ethernet LAN	Yes
Security algorithms	LEAP, MD5, MSCHAPv2, PEAP, SNMPv3, TLS, TTLS
Management protocols	DHCP, BOOTP, RARP, mDNS, IGMP, WINS, DDNS, SNMPv3, SNMPv1, SNMPv2c, Telnet, NTP, ICMP, HTTP, DNS, ARP, HTTPs (SSL6/TLS), SMTP, Finger
Mobile printing technologies	Apple AirPrint
Operational conditions
Operating relative humidity (H-H)	8 - 80%
Operating altitude	0 - 2.896 m
Operating temperature (T-T)	10 - 32 °C
Packaging content
Cartridge(s) included	Yes
Included cartridge capacity (black)	3000 pages
Cables included	AC
Packaging data
Package width	410 mm
Package depth	420 mm
Package height	280 mm
Package weight	10.5 kg
Paper handling
Envelopes sizes	7 3/4, 9, 10, B5, C5, DL
JIS B-series sizes (B0...B9)	B5
Non-ISO print media sizes	Executive, Folio
ISO A-series sizes (A0...A9)	A4, A5, A6
Paper tray media types	Card stock, Envelopes, Plain paper
Maximum ISO A-series paper size	A4
Performance
Internal memory	256 MB
Maximum internal memory	256 MB
Built-in processor	Yes
Sound pressure level (printing)	53 dB
Sound pressure level (duplex printing)	50 dB
Ports & interfaces
Direct printing	No
USB port	Yes
USB 2.0 ports quantity	1
USB connector	USB Type-B
Power
Power consumption (printing)	550 W
Power consumption (ready)	5.5 W
Energy Star Typical Electricity Consumption (TEC)	0.45 kWh/week
Printing
Colour	No
Print technology	Laser
Time to first page (black, normal)	6.2 s
Print speed (black, normal quality, A4/US Letter)	38 ppm
Maximum resolution	600 x 600 DPI
Duplex printing	Yes
Sustainability
Sustainability certificates	ENERGY STAR
System requirements
Windows operating systems supported	Windows 10, Windows 7, Windows 7 x64, Windows 8, Windows 8.1, Windows 8.1 x64
Linux operating systems supported	Yes
Server operating systems supported	Windows Server 2016, Windows Server 2019
Weight & dimensions
Width	368 mm
Depth	363 mm
Height	222 mm
Weight	9.3 kg

Features

Home & office Laser

600 x 600 DPI

Printing colours: Black

A4 38 ppm

Duplex printing

USB port Ethernet LAN

LCD Built-in display

Maximum duty cycle: 50000 pages per month

Total number of input trays: 1 Total input capacity: 350 sheets Total output capacity: 150 sheets

Internal memory: 256 MB Built-in processor