| Model | iDP-3550F | iDP-3551F | iDP-3550P |
| Printing method | Serial dot impact |
| Printing direction | Bi-directional |
| Head pins | 9 pins |
| Printing speed | Approx. 3.6 lines/sec. (DP-654)
Approx. 3.0 lines/sec. (DP-657) |
| Number of print columns | 63.6 mm / 40 columns (DP-654)
58.7 mm / 40 columns (DP-657) |
Character size
(W × H) | DP-654: 1.36 x 2.4 mm (7 dots), 1.36 x 3.1 mm (9 dots)
DP-657: 1.36 x 2.4 mm (7 dots), 1.36 x 3.1 mm (9 dots) |
| Character type | Alphanumeric, Katakana, International characters, Code page PC850, 860, 863, 865, 852, 866, 857, Windows code |
| Line feed speed | 21 lines/sec. (DP-654)
18 lines/sec. (DP-657) |
| Line spacing | 4.23 mm (DP-654)
2.82 mm (DP-657) |
| Paper feed | Friction | Sprocket |
| Paper | Ordinary paper and non-carbon paper: 76 mm ± 0.5 mm (W) x F83 mm (Outer diameter) | Fan-fold paper:
Width: 76 ~ 89 mm (3 ~ 3.5 inches) |
| Ink ribbon cartridge | Two colors (Red/Black), Single color (Black) |
| Interface | Parallel (Centronics), Serial (RS-232C) |
| Paper end sensor | Equipped | None |
| Auto cutter | None | Equipped (AC-134)
Capable of partial
and full cut | None |
| Paper winder | AW-3 (Option) | None | AW-3 (Option) |
| External device port | 2 cash drawers are supported |
| Buffer size | 6K bytes / 256 bytes, selectable with a DIP switch |
| Power supply | AC 120 V ±10 %, 50/60 Hz
AC 230 V ±10 %, 50/60 Hz |
| Power consumption | Printing: Approx. 30 W
Not printing: Approx. 10 W |
| Weight (approx.) | 2.8 kg | 3.0 kg | 2.8 kg |
Outer dimensions
(W × D × H) | 160 x 212 x 173 mm | 160 x 212 x 194 mm | 160 x 212 x 173 mm |
| Operating temperature and humidity | 0 to 40 °C, 35 to 85 % RH (no condensation) |
| Storage temperature and humidity | -20 to 60 °C, 10 to 90 % RH (no condensation) |
| Reliability | Printer: MCBF 4 million lines
Printer head: 80 million characters
Auto cutter: 300,000 cuts (iDP3551) |
| Safety standards | UL, C-UL, FCC class A, TUV-GS, CE marking |