Main Components of a PLC System: Complete Guide for Engineers
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The Siemens 6EP3436-8UB00-0AY0 SITOP PSU3800 converts a 400-500 V 3AC input into a stabilized 24 V DC output at 17 A (408 W), optimized for battery-charging profiles. It reaches 94% efficiency, includes an adjustable 24-28 V trim range, and provides a relay contact for remote 24V-OK signaling.
The 17 A / 408 W rating positions this PSU3800 unit above the lower-current SITOP DIN-rail supplies for loads that need more sustained 24 V current from a three-phase feed. Being optimized for battery charging, its adjustable 24-28 V output and switchable bridging characteristic support a float/boost charging curve that a fixed-voltage sibling cannot provide. The relay contact for 24 V OK gives a hardwired remote-monitoring signal without an add-on module, and the three-phase 400-500 V input matches cabinets already fed from a 3-phase supply rather than single-phase mains.
Three-phase-fed control cabinets, stand-by battery charging circuits, and machine panels needing more than 400 W at 24 V DC.
| product brand name | SITOP |
|---|---|
| product type designation | PSU3800 |
| product designation | Power supply SITOP modular |
| type of current supply | 24 V/17 A |
| 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 | 320 V |
| supply voltage at AC: full-scale value | 575 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 | 15 ms |
| operating condition of the mains buffering | at Vin = 400 V |
| input current: at rated input voltage 400 V | 1.1 A |
| input current: at rated input voltage 500 V | 0.9 A |
| current limitation of inrush current at 25 °C maximum | 16 A |
| I2t value maximum | 0.8 A2·s |
| fuse protection type | none |
| fuse protection type in the feeder | Required: 3-pole connected miniature circuit breaker 6 ... 16 A characteristic C or circuit breaker 3RV2011-1DA10 (setting 3 A) or 3RV2711-1DD10 (UL 489) |
| 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. 480 W |
| relative overall tolerance of the voltage | 3% |
| relative control precision of the output voltage: on slow fluctuation of input voltage | 0.1 % |
| residual ripple: maximum | 100 mV |
| voltage peak: maximum | 200 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 | 2.5 s |
| voltage increase time of the output voltage: maximum | 500 ms |
| output current: rated value | 17 A |
| output current: rated range | 0 ... 17 A; +60 ... +70 °C: Derating 2%/K |
| supplied active power typical | 408 W |
| constant overload current: on short-circuiting during the start-up typical | 19 A |
| bridging of equipment | Yes; switchable characteristic |
| number of parallel-switched equipment resources for increasing the power | 2 |
| Part number | 6EP3436-8UB00-0AY0 |
|---|---|
| Type designation | PSU3800 |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4025515154631 |
| ETIM class | EC002540 |
| eCl@ss | 27040701 |
| efficiency in percent | 94 % |
|---|---|
| power loss [W]: at rated output voltage for rated value of the output current typical | 26 W |
| relative control precision of the output voltage with rapid fluctuation of the input voltage by +/- 15% typical | 0.1 % |
|---|---|
| relative control precision of the output voltage load step of resistive load 50/100/50 % typical | 1% |
| setting time: load step 50 to 100% typical | 0.2 ms |
| setting time: load step 100 to 50% typical | 0.2 ms |
| relative control precision of the output voltage at load step of resistive load 10/90/10 % typical | 2% |
| setting time: load step 10 to 90% typical | 0.2 ms |
| setting time: load step 90 to 10% typical | 0.2 ms |
| setting time: maximum | 10 ms |
| design of the overvoltage protection | < 32 V |
|---|---|
| property of the output short-circuit proof | Yes |
| design of short-circuit protection | Alternatively, constant current characteristic approx. 19 A or latching shutdown |
| typical | 19 A |
| enduring short circuit current RMS value: typical | 19 A |
| display version for overload and short circuit | LED yellow for "overload", LED red for "latching shutdown" |
| 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 |
| leakage current: maximum | 3.5 mA |
| leakage current: typical | 0.9 mA |
| protection class IP | IP20 |
| 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 |
| 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: Regulatory Compliance Mark (RCM) | Yes |
| certificate of suitability: NEC Class 2 | No |
| certificate of suitability: SEMI F47 | Yes |
| type of certification: CB-certificate | Yes |
| certificate of suitability: IECEx | No |
|---|---|
| certificate of suitability: ATEX | No |
| certificate of suitability: ULhazloc approval | No |
| certificate of suitability: FM registration | No |
| 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 |
| Environmental Product Declaration | Yes |
|---|---|
| global warming potential [CO2 eq]: total | 687.9 kg |
| global warming potential [CO2 eq]: during manufacturing | 28.7 kg |
| global warming potential [CO2 eq]: during operation | 658.6 kg |
| global warming potential [CO2 eq]: after end of life | 0.24 kg |
| 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 |
| type of electrical connection | screw terminal |
|---|---|
| at input | L1, L2, L3, PE: 1 screw terminal each for 0.2 ... 4 mm2 single-core/finely stranded |
| at output | +, -: 2 screw terminals each for 0.2 ... 4 mm2 |
| for auxiliary contacts | 13, 14 (alarm signal): 1 screw terminal each for 0.14 ... 1.5 mm2; 15, 16 (Remote): 1 screw terminal each for 0.14 ... 1.5 mm2 |
| width × height × depth of the enclosure | 70 × 125 × 125 mm |
|---|---|
| installation width × mounting height | 70 mm × 225 mm |
| required spacing: top | 50 mm |
| required spacing: bottom | 50 mm |
| required spacing: left | 0 mm |
| required spacing: right | 0 mm |
| fastening method | Snaps onto DIN rail EN 60715 35x7.5/15 |
| DIN-rail mounting | Yes |
| S7 rail mounting | No |
| wall mounting | No |
| housing can be lined up | Yes |
| electrical accessories | Buffer module |
|---|---|
| mechanical accessories | Device identification label 20 mm × 7 mm, TI-grey 3RT2900-1SB20 |
| identification link | Yes; acc. to IEC 61406-1:2022 |
|---|
| other information | Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified) |
|---|
| Environmental Product Declaration: global warming potential [CO2 eq] / during manufacturing | 28.7 kg |
|---|
| Net weight | 1.1 kg |
|---|---|
| Package dimensions | 133 × 130 × 74 mm |
| Country of origin | Romania |
| Shipping weight | 1.6 kg |
| Ships from | Türkiye |
| Dispatch | 13 Nov |
| Stock | Low stock |
Source: manufacturer data · Last verified: 01 Nov 2026
No documents are on file for this part yet.
Ask us for the datasheetThe rated current of PSU3800 is 17 A.
The rated operational voltage of PSU3800 is 400–500 V AC.
The rated motor power of PSU3800 is 26 W kW.
The tariff (HS) code on file for PSU3800 is 85044060.
The EAN (GTIN) of PSU3800 is 4025515154631.
PSU3800 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
Master PLC system components: CPU, power supply, I/O modules, communication interfaces, and software with sizing formulas and selection tips. Shop at Stoklink.