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HP LaserJet Pro 300/400 Color M351/M451 - Product specifications

Product dimensions

Power consumption, electrical specifications, and acoustic emissions

Operating-environment specifications

Product dimensions

Product dimensions, with toner cartridge
Product	Height	Depth	Width	Weight
M351a	322 mm	454 mm	405 mm	22.7 kg
M451nw	322 mm	454 mm	405 mm	22.7 kg
M451dn	322 mm	484 mm	405 mm	23.9 kg
M451dw	322 mm	484 mm	484 mm	23.9 kg

Product dimensions with all doors, trays, and document feeder fully opened
Product	Height	Depth	Width
M351a	322 mm	659 mm	405 mm
M451nw	322 mm	659 mm	405 mm
M451dn	322 mm	689 mm	405 mm
M451dw	322 mm	689 mm	405 mm

Power consumption, electrical specifications, and acoustic emissions

Power consumption

Power consumption (average, in watts)¹^,²^,³
Product Series⁴	Printing	Ready	Sleep	Off
HP LaserJet Pro 300 Color M351	410 W	15.7 W	3.0 W	0.5 W
HP LaserJet Pro 400 Color M451	425 W	15.2 W	4.0 W	0.5 W

¹Values subject to change.

²Power reported is highest value measured for all product models using standard voltages.

³Default time from Ready mode to Sleep = 15 minutes

⁴M351: Speed is 18 ppm A4 size and 19 ppm Letter-size. M451: Speed is 20 ppm A4 size and 21 ppm Letter-size.

Electrical specifications

110-volt input voltage: 100 to 127 VAC (+/- 10%), 50/60 Hz (+/- 3 Hz)

220-volt input voltage: 220 to 240 VAC (+/- 10%), 50/60 Hz (+/- 3 Hz)

caution:
Power requirements are based on the country/region where the product is sold. Do not convert operating voltages. This will damage the product and void the product warranty.

Acoustic emissions

HP LaserJet Pro 300 Color M351¹
Sound power level Printing Ready	Declared per ISO 9296 L_WAd = 6.4 Bels (A) [64 dB(A)] L_WAd = 4.0 Bels (A) [40 dB(A)]
Sound pressure level - Bystander position Printing Ready	Declared per ISO 9296 L_pAm = 51 dB(A) L_pAm = 26 dB(A)

¹Acoustic values are subject to change.

HP LaserJet Pro 400 Color M451¹
Sound power level Printing Ready	Declared per ISO 9296 L_WAd = 6.5 Bels (A) [65 dB(A)] L_WAd = 4.1 Bels (A) [41 dB(A)]
Sound pressure level - Bystander position Printing Ready	Declared per ISO 9296 L_pAm = 51 dB(A) L_pAm = 27 dB(A)

¹Acoustic values are subject to change.

Operating-environment specifications

Operating-environment specifications
Environment	Recommended	Allowed
Temperature	17° to 25°C	15° to 30°C
Relative humidity	30% to 70% relative humidity (RH)	10% to 80% RH
Altitude	Not applicable	0 to 3048 m

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