S4D250-AH40-70 AC axial fan

sickle-shaped blades (S series)

with guard grille for short nozzle

ebm-papst Mulfingen GmbH & Co. KG

Bachmühle 2 · D-74673 Mulfingen
Phone +49 7938 81-0
Fax +49 7938 81-110
info1@de.ebmpapst.com
www.ebmpapst.com
Limited partnership · Headquarters Mulfingen
Amtsgericht (court of registration) Stuttgart · HRA 590344

General partner Elektrobau Mulfingen GmbH · Headquarters Mulfingen

Amtsgericht (court of registration) Stuttgart · HRB 590142

Nominal data

Type S4D250-AH40-70
Motor M4D068-CF

Phase 3~ 3~
Nominal voltage VAC 400 400
Wiring Y Y
Frequency Hz 50 60

Method of obtaining data fa fa

Valid for approval/standard CE CE
Speed (rpm) min-1 1400 1600
Power consumption W 23 30
Current draw A 0.06 0.06
Max. back pressure Pa 70 80
Max. back pressure in. wg 0.28 0.32
Min. ambient temperature °C -25 -25
Max. ambient temperature °C 90 90
ml = Max. load · me = Max. efficiency · fa = Free air · cs = Customer specification · ce = Customer equipment
Subject to change

Item no. 11776-5-9980 · ENU · Change 256827 · Approved 2022-05-10 · Page 1 / 6

ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · info1@de.ebmpapst.com · www.ebmpapst.com
 S4D250-AH40-70 AC axial fan
sickle-shaped blades (S series)
with guard grille for short nozzle

Technical description

Weight 2.3 kg
Size 250 mm
Motor size 68
Rotor surface Painted black
Blade material Sheet steel, painted black
Guard grille material Steel, phosphated and coated with black plastic
Number of blades 7
Airflow direction V
Direction of rotation Counterclockwise, viewed toward rotor
Degree of protection IP44; installation- and position-dependent as per EN 60034-5
Insulation class "B"
Moisture (F) / Environmental (H) H1+
protection class
Max. permitted ambient temp. + 80 °C
for motor (transport/storage)
Min. permitted ambient temp. for -40 °C
motor (transport/storage)
Installation position Shaft horizontal or rotor on bottom; rotor on top on request
Condensation drainage holes On rotor side
Mode S1
Motor bearing Ball bearing
Touch current according to IEC < 0.75 mA
60990 (measuring circuit Fig. 4,
TN system)
With cable Lateral
Protection class I (with customer connection of protective earth)
Conformity with standards EN 60335-1, motor does not have factory-installed overheating protection; CE
Approval UL 1004-1; CSA C22.2 No. 100

Item no. 11776-5-9980 · ENU · Change 256827 · Approved 2022-05-10 · Page 2 / 6

ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · info1@de.ebmpapst.com · www.ebmpapst.com
 S4D250-AH40-70 AC axial fan
sickle-shaped blades (S series)
with guard grille for short nozzle

Product drawing

1 Direction of air flow "V"

2 Cable PFA AWG20
4x splice

Item no. 11776-5-9980 · ENU · Change 256827 · Approved 2022-05-10 · Page 3 / 6

ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · info1@de.ebmpapst.com · www.ebmpapst.com
 S4D250-AH40-70 AC axial fan
sickle-shaped blades (S series)
with guard grille for short nozzle

Connection diagram

Change of rotation direction by reversing two phases

Three-phase motor
Y Star connection
1 Counterclockwise operation
L1 = V1 = blue
L2 = U1 = black
L3 = W1 = brown
2 Clockwise operation
L1 = U1 = black
L2 = V1 = blue
L3 = W1 = brown
PE green/yellow

Item no. 11776-5-9980 · ENU · Change 256827 · Approved 2022-05-10 · Page 4 / 6

ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · info1@de.ebmpapst.com · www.ebmpapst.com
 S4D250-AH40-70 AC axial fan
sickle-shaped blades (S series)
with guard grille for short nozzle

Curves: Air performance 50 Hz

in wg
Pa

40
0.16

4 ρ = 1.15 kg/m³ ± 2 %
Measurement: LU-77947-1

Air performance measured according to ISO

5801 installation category A. For detailed
information on the measurement setup,
contact ebm-papst. Intake sound level:
0.12

30 3 Sound power level according to ISO 13347 /

sound pressure level measured at 1 m
distance from fan axis. The values given are
valid under the specified measuring
conditions and may vary due to conditions of
installation. For deviations from the standard
configuration, the parameters have to be
checked on the installed unit.
0.08

20

2
0.04

10

0 100 200 300 400 500

1
600 cfm
Pfs

qv 200 400 600 800 1000 m³/h

Measured values
Wired U f n Pe I qV pfs qV pfs
V Hz min-1 W A m3/h Pa cfm in. wg
1 Y 400 50 1400 23 0.06 1030 0 605 0.00
2 Y 400 50 1385 24 0.06 930 15 545 0.06
3 Y 400 50 1370 26 0.06 780 30 460 0.12
4 Y 400 50 1365 28 0.06 600 40 355 0.16
Wired = Wiring · U = Voltage · f = Frequency · n = Speed (rpm) · Pe = Power consumption · I = Current draw · qV = Air flow · pfs = Pressure increase

Item no. 11776-5-9980 · ENU · Change 256827 · Approved 2022-05-10 · Page 5 / 6

ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · info1@de.ebmpapst.com · www.ebmpapst.com
 S4D250-AH40-70 AC axial fan
sickle-shaped blades (S series)
with guard grille for short nozzle

Curves: Air performance 60 Hz

in wg
Pa

50
0.2

ρ = 1.15 kg/m³ ± 2 %
4
Measurement: LU-77948-1

40 Air performance measured according to ISO

5801 installation category A. For detailed
information on the measurement setup,
0.15

contact ebm-papst. Intake sound level:

Sound power level according to ISO 13347 /
sound pressure level measured at 1 m
distance from fan axis. The values given are
valid under the specified measuring
30 3 conditions and may vary due to conditions of
installation. For deviations from the standard
configuration, the parameters have to be
checked on the installed unit.
0.1

20

2
0.05

10

0 100 200 300 400 500 600

1
cfm
Pfs

qv 200 400 600 800 1000 m³/h

Measured values
Wired U f n Pe I qV pfs qV pfs
V Hz min-1 W A m3/h Pa cfm in. wg
1 Y 400 60 1600 30 0.06 1170 0 690 0.00
2 Y 400 60 1570 32 0.06 1070 15 630 0.06
3 Y 400 60 1545 35 0.06 945 30 555 0.12
4 Y 400 60 1515 38 0.07 745 45 440 0.18
Wired = Wiring · U = Voltage · f = Frequency · n = Speed (rpm) · Pe = Power consumption · I = Current draw · qV = Air flow · pfs = Pressure increase

Item no. 11776-5-9980 · ENU · Change 256827 · Approved 2022-05-10 · Page 6 / 6

ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · info1@de.ebmpapst.com · www.ebmpapst.com