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Siemens 6AG1344-0SB00-7AY0 — PLCs (Programmable Logic Controllers)

Siemens 6AG1344-0SB00-7AY0 Power Supply, 48-54VDC 5A

Name: 6AG1344-0SB00-7AY0
Brand: Siemens
SKU: 6AG1344-0SB00-7AY0
Availability: LimitedAvailability
Author: AS-RS Aaron

MPN6AG1344-0SB00-7AY0

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Siemens SIPLUS power supply, 6AG1344-0SB00-7AY0, 48-54 VDC adjustable output, 5 A rated, 92% efficiency, DIN rail mounting.

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Siemens 6AG1344-0SB00-7AY0 datasheet (PDF)

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6AG1344-0SB00-7AY0 key specifications
Parameter	Value
Fuse protection type	T 6.3 A (not accessible), soldered
Type of signal at output	Relay contact (NO contact, rating 60 V DC/ 0.3 A) for 48 V OK
Type of electrical connection	screw-type terminals
Type of output voltage setting	via potentiometer; max. 240 W
Type of the power supply network	1-phase AC
Voltage curve at output	Controlled, isolated DC voltage
Adjustable output voltage	48 ... 54 V
At rated input voltage 120	4.4 A
At rated input voltage 230	2 A
Output voltage at DC rated value	48 V
On slow fluctuation of input voltage	0.2 %
Relative overall tolerance of the voltage	3 %

All specifications

6AG1344-0SB00-7AY0 additional specifications
Parameter	Value
Product function output voltage adjustable	Yes
Behavior of the output voltage when switching on	Overshoot of Vout approx. 2 %
At rated output voltage for rated value of the output current typical	12 W
Relative control precision of the output voltage with rapid fluctuation of the input voltage by +/- 15% typical	0.3 %
Design of Short-Circuit protection	Electronic shutdown, automatic restart
Property of the output Short-Circuit proof	Yes
Current limitation of inrush current at 25 °C maximum	58 A
Buffering time for rated value of the output current in the event of power failure minimum	30 ms
Supplied active power typical	240 W
Number of Parallel-Switched equipment resources for increasing the power	2
Line frequency	47 ... 63 Hz
Depth of the enclosure	125 mm
Width of the enclosure	42 mm
Height of the enclosure	125 mm
Product feature of the enclosure housing can be lined up	Yes
In horizontal mounting position during operation	-40; Startup @ -25 °C ... +70 °C; with natural convection
Installation altitude at height above sea level maximum	6 000 m
Ambient condition relating to ambient temperature - air pressure - installation altitude	In 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 °C	1 050 000 h
CE marking	Yes
Top	50 mm
Left	0 mm
Right	0 mm
Bottom	50 mm
1 at AC	85 ... 132 V
2 at AC	170 ... 264 V
Typical	1 mA
At input	L, N, PE: 1 screw terminal each for 0.5 ... 2.5 mm² single-core/finely stranded
At output	+, -: 2 screw terminals each for 0.5 ... 2.5 mm²
Rated range	0 ... 5 A; +60 ... +70 °C: Derating 5%/K
Rated value	5 A
1 rated value	50 Hz
2 rated value	60 Hz
In the feeder	Recommended miniature circuit breaker: from 10 A characteristic C
Mounting	Snaps onto DIN rail EN 60715 35x7.5/15
I2t value maximum	1.5 A²·s
Other information	Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified)
Galvanic isolation	Safety extra-low output voltage Uout acc. to EN 60950-1 and EN 50178
1 at AC rated value	100 V
2 at AC rated value	230 V
Protection class IP	IP20
Bridging of equipment	Yes
Efficiency in percent	92 %
For auxiliary contacts	13, 14 (alarm signal): 1 screw terminal each for 0.5 ... 2.5 mm²
Response delay maximum	1.5 s
For emitted interference	EN 61000-6-4
For interference immunity	EN 61000-6-2
Load step 10 to 90% typical	0.5 ms
Load step 90 to 10% typical	0.5 ms
During storage and transport	-40 ... +85 °C
At output 1 at DC rated value	48 V
For mains harmonics limitation	EN 61000-3-2
Design of input wide range input	No
On slow fluctuation of ohm loading	0.5 %
Operating resource protection class	Class I
Design of the overvoltage protection	< 60 V
Display version for normal operation	Green LED for 48 V OK
Operating condition of the mains buffering	at Vin = 120/230 V
Galvanic isolation between input and output	Yes
Chemical resistance to commercially available cooling lubricants	Yes; 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-830A	Yes; Conformal Coating, Class A

Product details

Regulated adjustable-output 48 V power supply for automation panels

The Siemens 6AG1344-0SB00-7AY0 is an active-production SIPLUS power supply delivering a controlled, isolated 48-54 VDC at 5 A, with 92% efficiency and a relay alarm output for 48 VOK status. Accepts two AC voltage ranges (85–132 V and 170–264 V) at 47–63 Hz. The auxiliary relay (NO contact, 60 V DC / 0.3 A) signals when the output is within tolerance — useful for remote status monitoring in a control system.

Mounting and thermal derating

Snaps onto 35 mm DIN rail per EN 60715; the 42 mm wide enclosure (125 x 125 mm) clears adjacent modules with no side spacing (0 mm left/right clearance required). Top and bottom need 50 mm free air each for convection. Full 5 A output is available from 0–60 °C; above 60 °C derate by 5 % per Kelvin up to 70 °C. Plan enclosure ventilation to avoid premature derating if mounted near heat sources.

Terminations and protection

Input L-N-PE use single screw terminals (0.5–2.5 mm²); output + and - use double terminals per pole to simplify daisy-chaining to loads. The alarm relay also lands on screw terminals. A non-accessible soldered T 6.3 A fuse protects the supply; the recommended upstream miniature circuit breaker is 10 A characteristic C.

CE marked, IP20 rated, and meets emission standard EN 61000-6-4 and immunity EN 61000-6-2. Galvanic isolation provides SELV output per EN 60950-1 and EN 50178.