Bambu Lab printer voltage: A1, A1 mini, P1S, X1C and H2D input ratings

Bambu Lab printers run on household AC: the A1 mini, A1, P1P, P1S, X1 Carbon and X1E accept anything from 100 to 240 volts AC (VAC) at 50 or 60 Hz. The H2D, H2S, H2C, P2S, X2D and A2L come in a 100 to 120 VAC version and a 200 to 240 VAC version. Every model plugs into a standard US 120 V outlet.

What voltage do Bambu Lab printers use?

Bambu Lab printers use 100 to 240 VAC at 50/60 Hz. The A1 mini, A1, P1 and X1 series take the full range with no switch to set. The H2 series, P2S, X2D and A2L come in a 100 to 120 V or a 200 to 240 V version, so the one you buy must match your outlet.

Model	Input voltage	Max power at 110 V	Max power at 220 V	Peak amps at 120 V
A1 mini	100 to 240 VAC, 50/60 Hz	150 W	150 W	1.25 A
A1	100 to 240 VAC, 50/60 Hz	350 W	1,300 W	2.9 A
P1P, P1S	100 to 240 VAC, 50/60 Hz	350 W	1,000 W	2.9 A
X1 Carbon	100 to 240 VAC, 50/60 Hz	350 W	1,000 W	2.9 A
X1E	100 to 240 VAC, 50/60 Hz	600 W	1,350 W	5.0 A
A2L	100 to 120 or 200 to 240 VAC, 50/60 Hz	1,000 W	1,000 W	8.3 A
P2S	100 to 120 or 200 to 240 VAC, 50/60 Hz	1,000 W	1,200 W	8.3 A
X2D	100 to 120 or 200 to 240 VAC, 50/60 Hz	1,100 W	1,600 W	9.2 A
H2S	100 to 120 or 200 to 240 VAC, 50/60 Hz	1,170 W	2,050 W	9.8 A
H2C	100 to 120 or 200 to 240 VAC, 50/60 Hz	1,250 W	1,800 W	10.4 A
H2D	100 to 120 or 200 to 240 VAC, 50/60 Hz	1,320 W	2,200 W	11.0 A

Voltages and maximums come from each model’s Bambu Lab spec sheet and Bambu’s power parameters page. For two-version models, the 110 V column is the 100 to 120 V unit and the 220 V column the 200 to 240 V unit.

Two listings disagree. Bambu’s wiki gives the X1E 600 W at 110 V, but an X1E spec sheet lists 750 W (6.25 A), so plan on 750 W. The wiki also puts the whole H2 series at 1,250 W on 110 V, while the H2D spec sheet says 1,320 W. Plan the H2D on 1,320 W.

What voltage is the Bambu Lab A1?

The A1 takes 100 to 240 VAC at 50/60 Hz, rated 350 W at 110 V and 1,300 W at 220 V. On a US outlet that is 2.9 A at most. Bambu measures it at about 95 W while printing PLA. The A1 power consumption breakdown has standby and cost figures.

The A1 mini takes the same 100 to 240 VAC. It is the one universal-input Bambu printer with the same rating, 150 W, at both voltages.

Why is the 220 V rating so much higher?

The heatbed makes the difference. Bambu’s internal power supplies for the X1C, P1 series and P2S convert the AC input to 24 V DC for “the entire printer except the heatbed.” The bed is fed separately, so its power follows your mains voltage. A resistive heater’s power is V² ÷ R, and doubling the voltage quadruples the watts:

P = V² ÷ R
At 220 V, power is (220 ÷ 110)² = 4 times the power at 110 V

Bambu’s published 220 V maximums for the A1, P1 and X1 run three to four times their 110 V figures. The A1 mini is the exception. The heater resistance calculator runs the formula for any bed.

Can I plug a Bambu Lab printer into a US outlet?

Yes. Every model runs from a standard grounded 120 V outlet (NEMA 5-15). The 100 to 240 V models need no converter and have no voltage switch. For the H2D, Bambu says to “purchase the version corresponding to your region’s voltage.” The X2D and A2L sheets say to check the label next to the power socket, which should read 100 to 120 VAC in the US.

Don’t connect a 100 to 120 V version to a 240 V outlet. Bambu sells the H2D’s AC board, which feeds the heated bed and chamber heater, in separate 110 V and 220 V versions. The voltage is built into the hardware, so for a printer bought abroad, Bambu says you may need a transformer. The voltage switch guide covers printers with a selector.

How many amps does a Bambu printer draw?

Divide the 110 V rating by 120 V. On a 110 V outlet the same watts draw a little more current:

amps = watts ÷ volts

A1, P1S, X1C:  350 W ÷ 120 V = 2.9 A
H2D at 120 V:  1,320 W ÷ 120 V = 11.0 A
H2D at 110 V:  1,320 W ÷ 110 V = 12.0 A

The maximum lasts only while the bed heats. Bambu says the H2D holds maximum power for no more than 3 minutes, and the P2S and X2D for about 3 to 5. Once printing, the draw drops: the wiki measures about 105 W on PLA for a P1S and 197 W for an H2D.

A clamp meter can read more than watts ÷ volts because of power factor, which Bambu lists at 0.45 to 0.63 for an X1C printing PLA. How many amps a 3D printer uses explains the gap.

Can an H2D share a 15 A circuit?

Barely. A long print is a continuous load under the National Electrical Code, so a 15 A circuit should carry no more than 12 A, or 1,440 W at 120 V. An H2D at full heat-up takes 11 to 12 A of that, leaving about 120 W. A computer on the same breaker can push the total past 12 A during warm-up.

Give it a 20 A circuit (16 A continuous, 1,920 W) or a 15 A circuit with nothing else on it. Two H2-series printers at full power exceed a 15 A circuit’s continuous limit.

Bambu’s Low Power Mode cuts an H2-series peak to about 860 W (7.2 A at 120 V), and the X2D’s to about 750 W. Add up everything on the breaker in the circuit capacity calculator. A new circuit is a job for a licensed electrician.

Does any Bambu printer use an external power adapter?

No. Every current Bambu printer takes an AC power cord straight into the machine, and the power supply sits inside. Even on the A1 mini it is screwed to the frame, as Bambu’s replacement guide shows. Only accessories use external adapters. On X1, P1 and A1 printers, each AMS 2 Pro filament unit needs Bambu’s switching adapter to run its drying function.