Printing
Print speed (colour, normal quality, A4/US Letter)	28, 27
Print speed (black, draft quality, A4/US Letter)	28 ppm
Colour
Print technology	Laser
Duplex printing
Maximum resolution	600 x 600 DPI
Print speed (black, normal quality, A4/US Letter)	27 ppm
Print speed (colour, draft quality, A4/US Letter)	28 ppm
Print speed (black, normal quality, A3)	14 ppm
Print speed (colour, normal quality, A3)	14 ppm
Warm-up time	120 s
Time to first page (black, normal)	16 s

Features
Maximum duty cycle	120000 pages per month
Number of print cartridges	4

Input & output capacity
Total input capacity	600 sheets
Total output capacity	250 sheets
Paper tray 2 input capacity	500 sheets
Maximum input capacity	2100 sheets
Maximum output capacity	250 sheets

Paper handling
Maximum ISO A-series paper size	A3
Paper tray media types	Envelopes, Glossy paper, Labels, Plain paper, Transparencies
ISO A-series sizes (A0...A9)	A3, A4, A5
JIS B-series sizes (B0...B9)	B4, B5
Duplex media weight	60 - 120 g/m²
Media types supported	Paper (extra heavy, glossy, heavy, heavy glossy, high gloss images, intermediate, light, plain, recycle, tough), envelopes, labels, cardstock, transparencies
Media size (tray 1)	Letter, letter-R, legal, executive, tabloid (11 x 17 in), ledger, 16K, 8K, A3, A4, A4-R, A5, envelope (No. 10, DL, C5, B5, Monarch), B4-JIS, B5-JIS, executive-JIS, double postcard-JIS, 12 x 18 in, 8.5 x 13 in, A6, B6, RA3, statement, 76.2 x 98 to 306 x 470 mm
Media weight (tray 1)	60 - 200 g/m²

Network
Network ready
Supported network protocols (IPv4)	Via HP Jetdirect print servers: TCP/IP, IPX/SPX, AppleTalk, Apple Rendezvous compatible, DLC/LLC, Auto-IP, IP Direct Mode, NDS, Bindery, NCP, NDPS, iPrint, Telnet, SLP, IGMP, BOOTP/DHCP, WINS, SNMP v 1 and v 2c, HTTP; may require software from the NOS vendor or third-party vendor: LPD, FTP Printing, IPP

Performance
Internal memory	160 MB
Maximum internal memory	544 MB
Built-in processor
Processor model	MIPS RISC
Processor frequency	533 MHz

Power
Power consumption (standby)	93 W
Power consumption (PowerSave)	28 W
Power consumption (off)	0.3 W

System requirements
Minimum system requirements for Macintosh	Mac OS X v10.2.8, 10.3, 10.4, 10.5, 10.6; 4 MB RAM; 160 MB available hard disk space; USB port or AppleTalk, Bonjour connectivity solution

Operational conditions
Operating temperature (T-T)	15 - 27 °C
Storage temperature (T-T)	0 - 35 °C
Operating relative humidity (H-H)	10 - 70%
Storage relative humidity (H-H)	10 - 90%
Operating temperature (T-T)	63 - 77 °F

Sustainability
Sustainability certificates	ENERGY STAR

Weight & dimensions
Maximum dimensions (W x D x H)	577 x 1550 x 640 mm
Pallet dimensions (W x D x H)	1010 x 780 x 822 mm
Weight	51.8 kg
Dimensions (WxDxH)	577 x 704 x 640 mm

Packaging data
Package weight	85 kg

Packaging content
Bundled software	Print drivers and installation software on CD-ROM: HP PCL 6, HP PostScript Level 3 emulation (32-bit drivers only), HP PCL 5c (provided on add printer install)

Logistics data
Pallet gross weight	95 kg
Products per pallet	1 pc(s)

Other features
Additional paper trays	500-sheet input tray 4 and feeder
Print quality (black, draft quality)	600 DPI
Print quality (black, normal quality)	600 DPI
Power supply type	110~220V
Recommended operating temperature range (T-T)	15 - 25 °C
Mac compatibility
I/O ports	1 USB, 1 parallel, 2 EIO, 1 Ethernet, 1 Jetlink
Custom media sizes	Tray 1: 76 x 127 to 306 x 470 mm; automatic two-sided printing, Tray 2, 3, 4, 5: 148 x 210 to 297 x 431.8 mm Tray 1: 3 x 5 to 12.05 x 18.5 in; automatic two-sided printing, Trays 2, 3, 4, 5: 5.8 x 8.3 to 11.7 x 17 in

Other features
Standard media sizes	A3, A4, A5, A6, B4 (JIS), B5, B5 (JIS), B6, C5, DL, double postcard (JIS), Executive (JIS), RA3
Memory upgrade	0.544 GB
Print margin bottom (A4)	5 mm
Print margin left (A4)	5 mm
Print margin right (A4)	5 mm
Print margin top (A4)	5 mm
Typefaces	80 internal TrueType fonts scalable in HP PCL, 92 internal scalable fonts in HP Postscript Level 3 emulation (Euro symbol built-in); additional font solutions available via third-party flash memory cards
Media weights by paper path	Tray 1: up to 200 g/m²; Tray 2, 3, 4, 5: up to 120 g/m²
Recommended media weight	Tray 1: 60 - 200; Tray 2, 3, 4, 5: 60 - 120
Standard output capacity for envelopes	40 sheets
Minimum system requirements	Microsoft Windows 7 ready. For more information go to http:///go/windows7. Some features may not be available. Windows Vista: 1 GHz processor, 512 MB RAM (check User’s Guide for minimum hard disk space); Windows 2000: 300 MHz processor, 64 MB RAM; Windows XP: 233 MHz processor, 64 MB RAM; for all systems: 180 MB availale hard disk space, CD-ROM drive or Internet connection, IEEE-1284 parallel port
Envelope feeder
Printer management	HP Web Jetadmin, HP Embedded Web Server, HP eToolbox
Acoustic power emissions	6.6 B(A), printing A4 monochrome from standard tray at full engine speed
Power requirements	100 - 240 VAC (- 10/+ 6%), 50/60 Hz (+/-2 Hz)
Print quality (colour, best quality)	600 DPI
Duplex print options	Automatic (standard)
Print speed (colour, best quality, A4)	28 ppm
Print speed (black, best quality, A4)	28 ppm
Colour printing technology	HP ImageREt 3600
Paper handling	100-sheet multipurpose tray 1, 500-sheet input tray 2, optional 500-sheet input trays 3/4, 250-sheet output bin
Electromagnetic compatibility	CISPR 22: 1997/EN 55022: 1998 Class B, EN 61000-3-2:2000, EN 61000-3-3: 1995, EN 55024: 1998, FCC Title 47 CFR, Part 15 Class B/ICES-003, Issue 4/GB9254-1998, GB17625.1-2003, EMC Directive 89/336/EEC and the Low Voltage Directive 73/23/EEC, and carries the CE-Marking accordingly
Standard input trays	2
Networking features	HP Jetdirect Fast Ethernet embedded print server Yes, via HP Jetdirect internal Fast Ethernet, Gigabit Ethernet, 802.11b wireless
Print quality (black, best quality)	600 x 600 DPI
Wireless option type	Optional, enabled with purchase of a hardware accessory
Standard output capacity for transparencies	250 sheets
Driver updates	OS/2, UNIX, Linux; basic printing support for DOS; current drivers and software are available from the Internet at /support/clj5550
Duplex supported media size	A3, A4, A5, B4-JIS, B5-JIS
Media handling	Sheetfed
Memory technology	Memory Enhancement technology (MEt)
Control panel	LCD control panel display with 4 lines of text and capable of showing graphic animations; 3 LED status lights; Cancel job, Pause/Resume, Help (appears as a question mark), Select (appears as a checkmark), Up arrow, Down arrow, Back arrow buttons
Maximum paper trays	5
Media size (tray 2)	A4, A3, A5, B4-JIS, B5-JIS
Media type and capacity (tray 2)	sheets: 500
Media weight (tray 2)	Up to 120 g/m²
Media weight (tray 3)	Up to 120 g/m²
Paper handling optional/input	500-sheet input trays (3), printer stand
Paper handling standard/input	100-sheet multipurpose tray, 500-sheet input Tray 2, automatic two-sided printing
Paper handling standard/output	250-sheet face-down output bin
Power consumption (active)	623 W
Safety	Argentina (TUV S Mark-Rs.92/98/Ds.1009/98), Australia (AS/NZ 3260), Canada (cUL-CAN/CSA C22.2 No.60950-00), China (GB4943), Czech Republic (CSN-IEC 60950-IEC 60825-1), Estonia (EEI-EN60950-IEC 60825-1), EU (CE Mark-Low Voltage Directive 73/23/EEC), Germany (TUV- EN60950-IEC 60825-1), Hungary (MEEI- IEC 60950-IEC 60825-1), Japan Radio Law, Lithuania (LS- IEC 60950-IEC 60825-1), Mexico (NOM NYCE-NOM 019 SCFI), Poland (B Mark- IEC 60950-IEC60825-1), (Russia (GOST- R50377), Slovakia (IEC 60950-IEC60825-1), Slovenia (SQI- IEC 60950-EN60825-1), South Africa (IEC 60950-IEC60825-1), USA (UL-UL 60950, FDA-21 CFR Chapter 1 Subchapter J for lasers); Class 1 Laser/LED Product
Security management description	Management security: SNMP v 3, SSL/TLS (HTTPS), 802.1x authentication; wireless network security: WPA (Wi-Fi Protected Access), WEP encryption (40/64- and 128-bit), 802.1x authentication (EAP-PEAP, LEAP, EAP-TTLS, EAP-TLS, EAP-MD5) with RADIUS servers
Upgrade type	Color tables, formatter firmware, software drivers, 500-sheet input trays (1, 2, or 3), hard disk, printer stand, memory
Downloadable software	Microsoft Windows 2000, XP (32-bit and 64-bit drivers), Server 2003 (32-bit and 64-bit drivers); Apple Macintosh OS 9 and later, Mac OS X v.10.1 and later
Compatible operating systems	Microsoft Windows 2000, XP Home, XP Professional, Windows Vista Ready, Windows Server 2003 (32/64 bit); Mac OS 9
Package dimensions (W x D x H)	995.7 x 767.1 x 823 mm (39.2 x 30.2 x 32.4")
Pallet dimensions (W x D x H) (imperial)	1010.9 x 779.8 x 823 mm (39.8 x 30.7 x 32.4")
Pallet weight (imperial)	94.8 kg (208.9 lbs)
Product dimensions when open (LxWxD)	57.7 cm (22.7")
Weight (imperial)	114 lb
Acoustic pressure emissions bystander (active, print, copy or scan)	49 dB(A)
Duplex binding
First page out (black&white, A4, ready)	16 s
First page out (black&white, letter, ready)	16 s
First page out (black&white, letter, sleep)	41 s
Media sizes supported (imperial)	Letter, legal, statement, executive, 11 x 17 in, ledger, envelopes (No. 10, Monarch)
Operating altitude (imperial)	10000 ft
Package weight (imperial)	84.8 kg (187 lbs)
Print speed (black, best quality, letter)	< 27
Print speed (colour, best quality, letter)	< 27
Size (imperial)	57.7 cm (22.7")
Recommended media weight (duplex, imperial)	16 to 32 lb
Package dimensions (WxDxH)	995 x 767 x 822 mm