TASKalfa 4551ci

  • Offer high productivity by combining high quality color printing at high speed with high capacity document processing
  • Up to 45 pages per minute A4 in color
  • Time to first copy 5.1 seconds or less
  • Standard 320GB hard disk capacity and 3.5GB RAM to meet heavy duty tasks without additional hard drive
  • Wide range of media up to 300 g/m², 305 x 457 mm and banner printing
  • Diversified Finishing capabilities to meet different users’ requirements in producing professional business document especially heavy volume users
  • Long-life components provide unprecedented efficiency and reliability

“Covers & Page Insert ” Demonstration

“Prevent Bleed Through” Demonstration

“Sending” Demonstration

“Text Stamp/Bates Stamp” Demonstration

Catalog PDF Download
2 MB


Main Function Copy, Print, Scan, Fax (Optional)
Writing Method Semiconductor Laser
CPU P1022 (Dual Core) / 1067MHz
Print Speed (A4) , Simplex (Mono/Color) 45/45 cpm
Scanning Speed (A4, 300dpi) , DP-770(B) (Mono/Color) , Simplex 75/75 ipm
Scanning Speed (A4, 300dpi) , DP-770(B) (Mono/Color) , Duplex 45/45 ipm
Scanning Speed (A4, 300dpi) , DP-772 (Mono/Color) , Simplex 80/80 ipm
Scanning Speed (A4, 300dpi) , DP-772 (Mono/Color) , Duplex 160/160 ipm
Memory/ HDD Capacity 3.5GB/ 320GB
Warm Up Time 30 seconds
Paper Capacity , Standard 2 x 500 sheets (Cassette) + 150 sheets (MPT)
Paper Capacity , Maximum 7,650 sheets (Main Unit + PF-740(B) + PF-780(B) + PF-740(B) + MPT)
Paper Size , Cassette Min. A5R - Max.12”x18” (304 x 457mm)
Paper Size , MPT Min. A6R - Max.12”x18” (304 x 457mm) & Banner Print of 1,220mm
Paper Weight , Cassette 60 to 256 g/m² (Standard & Optional)
Paper Weight , MPT 60 to 300 g/m²
Duplex Printing Paper size: B5 to 12”x18”; Paper weight: 60 to 256 g/m²
Control Panel 8.5 inch Color Touch LCD Panel
Dimension (W x D x H) (Main Unit) 648mm x 767mm x 747mm
Weight (Main Unit) Approx. 114kg
Power Consumption (Standard configuration) , Copy/Print Mode Mono: 990W or less; Color: 1,030W or less
Power Consumption (Standard configuration) , Stand-by Mode 200W or less
Power Consumption (Standard configuration) , Energy Saver 1.8W or less
Noise (ISO7779/ ISO9296) , Copy/Print Mode 72.5dB(A)
Noise (ISO7779/ ISO9296) , Stand-by Mode 58dB(A)

Print Functions

Resolution 600 x 600 dpi; 9600 x 600 dpi level
PDL PRESCRIBE, PCL6, KPDL3 (PostScript 3 compatible), XPS, PDF Direct Print
First Print Out Time (Mono/Color) 5.4/6.6 seconds
Supported Protocol NetBEUI, IPv6, IPv4, IPSec, IPP, IPP over SSL, WSD Print, Bonjour
Operating System Supported Windows Server 2003, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10; Apple Macintosh OS 10.x
Interface USB2.0 High Speed x1; 1000BASE-T/100BASE-TX/10BASE-T; USB Host interface (USB Host) x4
USB Memory Printing Standard
USB Memory Printing Format TIFF, JPEG, PDF, XPS
e-MPS Printing Job retention and Custom Box function

Copy Functions

Copy Size Max. A3 (Ledger) – Min. A6R
Resolution 600 x 600 dpi
First Copy Time (Mono/Color) 3.9/5.1 seconds
Zoom Ratio , Manual 25% to 400% (1% per Step)
Zoom Ratio , Pre-defined Easy setting: 4R4E; Detail setting: 13 steps
Multiple Copy 1 to 999

Scan Functions

Color Selection Auto Color (Color/Gray); Auto Color (Color/B&W); Full Color; Grayscale; Black & White
Resolution 600dpi, 400dpi, 300dpi, 200dpi, 200x100dpi, 200x400dpi
File Format TIFF, JPEG, XPS, PDF (MMR/JPG/High-compression PDF), Searchable PDF (Optional)
Image Type Mode Text, Photo, Text + Photo
Transmission Type Scan to SMB; Scan to E-mail; Scan to FTP or FTP over SSL; Scan to USB; TWAIN Scan; WSD Scan
Address Storage 2,000 addresses (Common address list), 500 groups (Group address list)


Fax Functions (Optional)
Original Size Max. A3 (Ledger) – Min. A5 (Statement)
Paper Size Max. A3 (Ledger) – Min. A5 (Statement)
Coding Method MMR, MR, MH, JBIG
Transmission Speed 33.6/31.2/28.8/26.4/24.0/21.6/19.2/16.8/14.4/12.0/9.6/7.2/4.8/2.4 kbps
Memory Standard: 12MB; Maximum: 120MB (with optional fax memory)
G3 FAX/ DUAL FAX/ Network FAX Yes
Internet FAX Optional Internet FAX Kit(A)
  • 2014 BLI Highly Recommended
  • Blue Angel eco label


2014 BLI Highly Recommended Blue Angel Energy Star