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- Part number
- 6EP1437-2BA20
- Model no
- PSU300S
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· From Türkiye
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SITOP PSU300SSiemens 6EP1437-2BA20 SITOP PSU300S 400-500V 3AC 24V/40A Power Supply
SITOP PSU300S power supply, 400-500V 3AC input, 24V DC/40A output, 960W, IP20.
Description
About the PSU300S
About the PSU300S
The Siemens SITOP PSU300S (6EP1437-2BA20) is a stabilized DIN-rail power supply that converts 400-500 V three-phase AC input into a regulated 24 V DC output at up to 40 A. It delivers 960 W at 91.5% efficiency, includes a floating relay contact for a 24 V OK signal, and its output voltage is adjustable from 24 to 28 V via potentiometer for compensating cable drop.
Certifications & Standards
- CE
- UKCA
- EAC
- CB
- shipbuilding
- ABS
- DNV
- EPD
Selection Notes
The 40 A rating and 960 W output put this at the top of the PSU300S 3AC range, sized for cabinets with multiple PLCs, drives, and I/O racks on one 24 V bus rather than a single small load. The output accepts a 150% overload for up to 5 s per minute, which covers inrush from contactors and solenoids without nuisance shutdowns; automatic-restart short-circuit protection means it recovers on its own once the fault clears instead of requiring a manual reset.
Applications
Sized for control cabinets and machine panels needing a single 24 V DC bus for PLCs, I/O, drives, and sensors from a 400-500 V three-phase supply - typical in larger machine builds and process skids.
Specification
Full specification
General information 4
| product brand name | SITOP |
|---|---|
| product type designation | PSU300S |
| product designation | Power supply SITOP smart |
| type of current supply | 24 V/40 A |
Input 19
| type of the power supply network | 3-phase AC |
|---|---|
| phase number | 3 |
| voltage curve at input | AC |
| supply voltage at AC: minimum rated value | 400 V |
| supply voltage at AC: maximum rated value | 500 V |
| supply voltage at AC: initial value | 340 V |
| supply voltage at AC: full-scale value | 550 V |
| supply voltage: at 50 Hz | 400 V |
| supply voltage: at 60 Hz | 500 V |
| line frequency | 50/60 Hz |
| wide range input | Yes |
| buffering time for rated value of the output current in the event of power failure minimum | 6 ms |
| operating condition of the mains buffering | at Vin = 400 V |
| input current: at rated input voltage 400 V | 2 A |
| input current: at rated input voltage 500 V | 1.7 A |
| current limitation of inrush current at 25 °C maximum | 60 A |
| I2t value maximum | 3.4 A2·s |
| fuse protection type | none |
| fuse protection type in the feeder | Required: 3-pole connected miniature circuit breaker 10 ... 16 A characteristic C or circuit breaker 3RV2011-1DA10 (setting 3 A) or 3RV2711-1DD10 (UL 489- listed, DIVQ) |
Output 27
| voltage curve at output | Controlled, isolated DC voltage |
|---|---|
| product function output voltage controlled | Yes |
| product function output voltage stabilized | Yes |
| output voltage at DC rated value | 24 V |
| output voltage: at output 1 at DC rated value | 24 V |
| output voltage: at output 1 at DC | 24 V |
| output voltage adjustable | Yes; via potentiometer |
| adjustable output voltage | 24 ... 28 V; max. 960 W |
| relative overall tolerance of the voltage | 3% |
| relative control precision of the output voltage: on slow fluctuation of input voltage | 1% |
| residual ripple: maximum | 150 mV |
| voltage peak: maximum | 240 mV |
| display version for normal operation | Green LED for 24 V OK |
| type of signal at output | Relay contact (NO contact, rating 60 V DC/ 0.3 A) for "24 V OK" |
| behavior of the output voltage when switching on | No overshoot of Vout (soft start) |
| response delay maximum | 1.5 s |
| voltage increase time of the output voltage: typical | 15 ms |
| voltage increase time of the output voltage: maximum | 500 ms |
| output current: rated value | 40 A |
| output current: rated range | 0 ... 40 A; 48 A up to +45°C; +60 ... +70 °C: Derating 3%/K |
| supplied active power typical | 960 W |
| short-term overload current: on short-circuiting during the start-up typical | 65 A |
| short-term overload current: at short-circuit during operation typical | 65 A |
| duration of overloading capability for excess current: on short-circuiting during the start-up | 100 ms |
| duration of overloading capability for excess current: at short-circuit during operation | 100 ms |
| bridging of equipment | Yes |
| number of parallel-switched equipment resources for increasing the power | 2 |
Show all 134 specifications ↓ Show less ↑84 more values in Identification, Efficiency, Closed-loop control, Protection and monitoring, Safety, EMC, Standards, specifications, approvals, Standards, specifications, approvals hazardous environments, Standards, specifications, approvals marine classification, Standards, specifications, approvals Environmental Product Declaration, Ambient conditions, Connection method, Mechanical data, Accessories, Additional information, Approvals Certificates, Logistics.
Identification 10
| Part number | 6EP1437-2BA20 |
|---|---|
| Type designation | PSU300S |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4025515151395 |
| ETIM class | EC002540 |
| eCl@ss | 27040701 |
Efficiency 2
| efficiency in percent | 91.5 % |
|---|---|
| power loss [W]: at rated output voltage for rated value of the output current typical | 89 W |
Closed-loop control 8
| relative control precision of the output voltage with rapid fluctuation of the input voltage by +/- 15% typical | 3% |
|---|---|
| relative control precision of the output voltage load step of resistive load 50/100/50 % typical | 1.5 % |
| setting time: load step 50 to 100% typical | 1 ms |
| setting time: load step 100 to 50% typical | 1 ms |
| relative control precision of the output voltage at load step of resistive load 10/90/10 % typical | 3% |
| setting time: load step 10 to 90% typical | 1 ms |
| setting time: load step 90 to 10% typical | 1 ms |
| setting time: maximum | 10 ms |
Protection and monitoring 6
| design of the overvoltage protection | protection against overvoltage in case of internal fault Vout < 35 V |
|---|---|
| property of the output short-circuit proof | Yes |
| design of short-circuit protection | Electronic shutdown, automatic restart |
| typical | 50 A |
| overcurrent overload capability: in normal operation | overload capability 150 % Iout rated up to 5 s/min |
| enduring short circuit current RMS value: maximum | 14 A |
Safety 4
| galvanic isolation between input and output | Yes |
|---|---|
| galvanic isolation | Output voltage: SELV, ES1 (IEC 62368-1), DVC As (IEC 61204-7) |
| operating resource protection class | Class I |
| protection class IP | IP20 |
EMC 3
| standard: for emitted interference | EN 55022 Class B |
|---|---|
| standard: for mains harmonics limitation | EN 61000-3-2 |
| standard: for interference immunity | EN 61000-6-2 |
Standards, specifications, approvals 8
| certificate of suitability: CE marking | Yes |
|---|---|
| certificate of suitability: UL approval | Yes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259 |
| certificate of suitability: UKCA marking | Yes |
| certificate of suitability: EAC approval | Yes |
| certificate of suitability: NEC Class 2 | No |
| type of certification: BIS | Yes; R-41183539 |
| type of certification: CB-certificate | Yes |
| MTBF at 40 °C | 500 000 h |
Standards, specifications, approvals hazardous environments 4
| certificate of suitability: IECEx | No |
|---|---|
| certificate of suitability: ATEX | No |
| certificate of suitability: ULhazloc approval | No |
| certificate of suitability: FM registration | No |
Standards, specifications, approvals marine classification 5
| shipbuilding approval | Yes |
|---|---|
| Marine classification association: American Bureau of Shipping Europe Ltd. (ABS) | Yes |
| Marine classification association: French marine classification society (BV) | No |
| Marine classification association: Det Norske Veritas (DNV) | Yes |
| Marine classification association: Lloyds Register of Shipping (LRS) | No |
Standards, specifications, approvals Environmental Product Declaration 5
| Environmental Product Declaration | Yes |
|---|---|
| global warming potential [CO2 eq]: total | 2 847 kg |
| global warming potential [CO2 eq]: during manufacturing | 61.2 kg |
| global warming potential [CO2 eq]: during operation | 2 783.6 kg |
| global warming potential [CO2 eq]: after end of life | 0.92 kg |
Ambient conditions 4
| ambient temperature: during operation | -25 ... +70 °C; with natural convection |
|---|---|
| ambient temperature: during transport | -40 ... +85 °C |
| ambient temperature: during storage | -40 ... +85 °C |
| environmental category according to IEC 60721 | Climate class 3K3, 5 ... 95% no condensation |
Connection method 4
| type of electrical connection | screw terminal |
|---|---|
| at input | L1, L2, L3, PE: 1 screw terminal each for 0.5 ... 4 mm2 single-core/finely stranded |
| at output | +, -: 2 screw terminals each for 0.5 ... 10 mm2 |
| for auxiliary contacts | 13, 14 (alarm signal): 1 screw terminal each for 0.05 ... 2.5 mm2 |
Mechanical data 11
| width × height × depth of the enclosure | 145 × 145 × 150 mm |
|---|---|
| installation width × mounting height | 145 mm × 225 mm |
| required spacing: top | 40 mm |
| required spacing: bottom | 40 mm |
| required spacing: left | 0 mm |
| required spacing: right | 0 mm |
| fastening method | Snaps onto DIN rail EN 60715 35x15 |
| DIN-rail mounting | Yes |
| S7 rail mounting | No |
| wall mounting | No |
| housing can be lined up | Yes |
Accessories 2
| electrical accessories | Redundancy module, buffer module, selectivity module, DC UPS |
|---|---|
| mechanical accessories | Device identification label 20 mm × 7 mm, pale turquoise 3RT1900-1SB20 |
Additional information 1
| other information | Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified) |
|---|
Approvals Certificates 1
| Environmental Product Declaration: global warming potential [CO2 eq] / during manufacturing | 61.2 kg |
|---|
Logistics 6
| Net weight | 3.1 kg |
|---|---|
| Country of origin | Romania |
| Shipping weight | 3.6 kg |
| Ships from | Türkiye |
| Dispatch | 13 Nov |
| Stock | In stock |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
Documents for 6EP1437-2BA20
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Ask us for the datasheet
Certifications
Certifications and standards
- CE marking
- UKCA marking
- EAC approval
- CB-certificate
- shipbuilding approval
- American Bureau of Shipping Europe Ltd. (ABS)
- Det Norske Veritas (DNV)
- Environmental Product Declaration
Quick answers
Questions about the PSU300S
What is the rated current of PSU300S?
The rated current of PSU300S is 40 A.
Which supply voltage is PSU300S rated for?
The rated operational voltage of PSU300S is 400–500 V AC.
What motor power is PSU300S rated for?
The rated motor power of PSU300S is 0.96 kW.
What is the HS code of PSU300S for customs?
The tariff (HS) code on file for PSU300S is 85044083.
What is the EAN of PSU300S?
The EAN (GTIN) of PSU300S is 4025515151395.
Where does PSU300S ship from, and how fast?
PSU300S ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
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Series
Siemens SITOP PSU300S
- Brand
- Siemens
- Series
- SITOP PSU300S
