About

SITOP PSU300S 24V/40A

Article No.: 6EP1437-2BA20
Stabilized Power Supply – 3-phase AC input, 24 V DC / 40 A output

Input

• Power supply network: 3-phase AC

• Supply voltage: 400–500 V AC (min: 400 V, max: 500 V, initial: 340 V, full-scale: 550 V)

• Wide range input: Yes

• Line frequency: 47–63 Hz

• Input current:

  • 400 V: 2 A

  • 500 V: 1.7 A

• Inrush current max (25°C): 60 A

• I²t value max: 3.4 A²·s

• Fuse protection type: None

• Feeder protection required: 3-pole MCB 10–16 A (C characteristic) or 3RV2011-1DA10 (3 A) / 3RV2711-1DD10

• Buffering time at rated output current (power failure): 6 ms

Output

• Voltage: 24 V DC (adjustable via potentiometer: 24–28 V)

• Output curve: Controlled, isolated DC voltage

• Rated current: 40 A (range 0–40 A; 48 A up to +45°C; derating 3%/K from +60–70°C)

• Max. short-term overload current: 65 A

• Soft start: No overshoot of Vout

• Response delay max: 1.5 s

• Supplied active power: 960 W

Performance & Efficiency

• Efficiency: 91.5%

• Power loss at rated output: 89 W

• Control precision:

  • Input voltage fluctuation ±15% → 3%

  • Resistive load step 50/100/50% → 1.5%

  • Load step 10/90/10% → 3%

• Setting time load step 50–100%: 1 ms

• Setting time load step 10–90%: 1 ms

Protection & Safety

• Overvoltage protection: Vout < 35 V (internal fault)

• Short-circuit proof: Yes (Electronic shutdown, automatic restart, typical 50 A)

• Overcurrent/overload capability: 150% Iout for 5 s/min

• Enduring short-circuit current RMS max: 14 A

• Galvanic isolation: Input ↔ Output

• Protection class: IP20, Class I

EMC Standards

• Emitted interference: EN 55022 Class B

• Mains harmonics limitation: EN 61000-3-2

• Interference immunity: EN 61000-6-2

Approvals

• CE marking: Yes

• UL / cULus: Yes (UL 508, CSA C22.2 No. 107.1)

• CSA: Yes

• UKCA marking: Yes

• EAC approval: Yes

• NEC Class 2: No

• BIS: Yes

• CB certificate: Yes

• MTBF (40°C): 500,000 h

Environmental & Marine

• IECEx / ATEX / ULhazloc / FM: No

• Marine classification:

  • ABS: Yes

  • DNV: Yes

  • BV / LRS: No

• Environmental Product Declaration: Yes

• Global warming potential (CO₂ eq): Total 2,847 kg (Manufacturing: 61.2 kg, Operation: 2,783.6 kg, End of life: 0.92 kg)

Ambient Conditions

• Operation: –25 … +70 °C (natural convection)

• Transport / Storage: –40 … +85 °C

• Humidity: 5–95%, no condensation

Connections

• Input (L1, L2, L3, PE): Screw terminal, 0.5–4 mm²

• Output (+ / –): 2 screw terminals, 0.5–10 mm²

• Auxiliary contacts (alarm 13/14): 0.05–2.5 mm²

Mechanical Data

• Dimensions (W × H × D): 145 × 145 × 150 mm

• Mounting height / width: 225 × 145 mm

• Required spacing: Top 40 mm, Bottom 40 mm, Left 0 mm, Right 0 mm

• DIN-rail mounting: Yes (EN 60715 35×15)

• Net weight: 3.1 kg

• Housing can be lined up: Yes 

Technical Details