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Siemens 6AG1437-3BA10-7AA0 — Industrial PCs

Siemens 6AG1437-3BA10-7AA0 SITOP Power Supply 40A

MPN6AG1437-3BA10-7AA0

Siemens SITOP power supply, 6AG1437-3BA10-7AA0, 40 A rated, adjustable 24–28.8 V DC output, 92% efficiency, DIN rail mounting.

$652.78Ref. price · indicative, final on quote
Siemens 6AG1437-3BA10-7AA0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6AG1437-3BA10-7AA0 key specifications
ParameterValue
Type of signal at outputRelay contact (NO contact, rating 60 V DC/ 0.3 A) for "24 V OK"
Type of electrical connectionscrew-type terminals
Type of output voltage settingvia potentiometer; max. 960 W
Type of the power supply network3-phase AC
Voltage curve at outputControlled, isolated DC voltage
Adjustable output voltage24 ... 28.8 V
At rated input voltage 4002.6 A
At rated input voltage 5002.1 A
Output voltage at DC rated value24 V
On slow fluctuation of input voltage0.1 %
Relative overall tolerance of the voltage3 %
Product function output voltage adjustableYes

All specifications

6AG1437-3BA10-7AA0 additional specifications
ParameterValue
At rated output voltage for rated value of the output current typical83 W
Relative control precision of the output voltage with rapid fluctuation of the input voltage by +/- 15% typical1 %
At Short-Circuit during operation25 ms
Design of Short-Circuit protectionAlternatively, constant current characteristic approx. 44 A or latching shutdown
At Short-Circuit during operation typical120 A
Property of the output Short-Circuit proofYes
Display version for overload and short circuitLED yellow for "overload", LED red for "latching shutdown"
On Short-Circuiting during the Start-Up typical44 A
Current limitation of inrush current at 25 °C maximum56 A
Buffering time for rated value of the output current in the event of power failure minimum15 ms
Supplied active power typical960 W
Number of Parallel-Switched equipment resources for increasing the power2
Line frequency47 ... 63 Hz
Depth of the enclosure150 mm
Width of the enclosure150 mm
Height of the enclosure125 mm
Product feature of the enclosure housing can be lined upYes
In horizontal mounting position during operation-25 ... +70 °C; with natural convection
Installation altitude at height above sea level maximum6 000 m
Ambient condition relating to ambient temperature - air pressure - installation altitudeIn case of operation at altitudes of 2000 - 6000 m above sea level: Output power derating of -7.5 %/1000 m or reduction of the ambient temperature by 5 K/1000 m
MTBF at 40 °C885 739 h
CE markingYes
Top50 mm
Left0 mm
Right0 mm
Bottom50 mm
Typical44 A
At inputL1, L2, L3, PE: 1 screw terminal each for 0.2 ... 4 mm² single-core/finely stranded
At output+, -: 2 screw terminals each for 0.33 ... 10 mm²
Rated range0 ... 40 A; +60 ... +70 °C: Derating 3.75%/K
Rated value40 A
1 rated value50 Hz
2 rated value60 Hz
In the feederRequired: 3-pole connected miniature circuit breaker 10 ... 16 A characteristic C or circuit breaker 3RV2011-1DA10 (setting 3 A) or 3RV2711-1DD10 (UL 489)
Initial value320 V
MountingSnaps onto DIN rail EN 60715 35x15
Full-Scale value575 V
I2t value maximum2.24 A²·s
Other informationSpecifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified)
Galvanic isolationSafety extra-low output voltage Uout acc. to EN 60950-1 and EN 50178
Maximum rated value500 V
Minimum rated value400 V
Protection class IPIP20
Bridging of equipmentYes; switchable characteristic
Efficiency in percent92 %
Electrical accessoriesBuffer module
For auxiliary contacts13, 14 (alarm signal): 1 screw terminal each for 0.14 ... 1.5 mm²
Mechanical accessoriesDevice identification label 20 mm × 7 mm, pale turquoise 3RT1900-1SB20
For emitted interferenceEN 55022 Class B
For interference immunityEN 61000-6-2
During storage and transport-40 ... +85 °C
At output 1 at DC rated value24 V
For mains harmonics limitationEN 61000-3-2
Design of input wide range inputYes
On slow fluctuation of ohm loading0.2 %
Operating resource protection classClass I
Design of the overvoltage protection< 35 V
Display version for normal operationGreen LED for 24 V OK
Operating condition of the mains bufferingat Vin = 400 V
Galvanic isolation between input and outputYes
Overcurrent overload capability in normal operationoverload capability 150 % Iout rated up to 5 s/min
Chemical resistance to commercially available cooling lubricantsYes; incl. diesel and oil droplets in the air
Product conformity of the coating qualification and performance of electrical insulating compound for printed board assemblies according to IPC-CC-830AYes; Conformal Coating, Class A

Product details

40 A SITOP with Adjustable Output

The Siemens 6AG1437-3BA10-7AA0 is a 40 A rated switched-mode power supply from the SITOP series. It accepts a three-phase input of 400–500 V AC (47–63 Hz) and delivers an adjustable output from 24 to 28.8 V DC. Efficiency reaches 92% at full rated load, keeping enclosure heat rise in check.

DIN Rail Clearance and Derating

For natural convection cooling, maintain 50 mm clearance above and below the unit (top and bottom, respectively). No side clearance is required — left and right clearances are both 0 mm. Below +60 °C ambient, the full 40 A is available; above that, derating applies at 3.75% per Kelvin up to +70 °C. The compact enclosure measures 150 mm wide by 125 mm high by 150 mm deep. The IP20 protection rating suits clean, dry control cabinets; for marine or dusty environments, the panel itself must provide ingress protection.

EMC and Safety Compliance

The unit carries CE marking and meets EN 55022 Class B for conducted and radiated emissions — critical for installations subject to vessel or industrial EMC surveys. Immunity is per EN 61000-6-2, covering the industrial environment. Galvanic isolation provides safety extra-low voltage (SELV) output per EN 60950-1 and EN 50178, suitable for feeding downstream 24 V loads.

Frequently asked questions

What clearance is required around this power supply for proper cooling?

Maintain 50 mm free space above and below the unit. No side clearance is needed — left and right clearances are both 0 mm.

What compliance documentation does this power supply carry?

It bears CE marking, meets EN 55022 Class B for emissions, and EN 61000-6-2 for immunity. Isolation is SELV per EN 60950-1 and EN 50178.

What is the output voltage range?

The output is adjustable from 24 V to 28.8 V DC via the built-in potentiometer.

What input supply does it require?

It accepts a three-phase input of 400–500 V AC at 47 to 63 Hz. For branch-circuit protection, use a 3-pole miniature circuit breaker 10–16 A characteristic C or a Siemens 3RV breaker set to 3 A.

MPN
6AG1437-3BA10-7AA0