Key Ratings & Fit
The 6EP3437-8SB00-0AY0: Rated 40 A continuous at 575 V input, 50/60 Hz. That's the headline number for sizing — but watch the derating: above 60 °C ambient, you lose 4% per Kelvin up to 70 °C. At 70 °C, that's 40 A × (1 - 0.04 × 10) = 24 A effective. Input voltage range is 400–500 V AC, three-phase (, L2, L3, PE). The unit also handles 320 V initial inrush. Feeder protection is specified: a 3-pole 10–16 A C-curve MCB or a Siemens 3RV2011-1DA10 (3 A setting) or 3RV2711-1DD10 (UL 489). Don't skip this — the I²t max is 2.24 A²·s, so the upstream breaker must coordinate. Output is SELV (safety extra-low voltage) per EN 60950-1 and EN 50178, galvanically isolated. The output terminals: two screw terminals for + (0.5–16 mm²) and three for - (same range). That's generous for paralleling loads or daisy-chaining to a distribution block.
Snaps onto DIN rail EN 60715 35×15. Clearance: 40 mm top and bottom, 0 mm left and right — so it can sit flush against other modules in a row. IP20 enclosure, so it's for clean, dry cabinet environments only. Operating temperature -25 to +70 °C with natural convection; storage/transport -40 to +85 °C.
Compliance & Approvals
UL/CSA listed (UL 508, CSA C22.2 No. 107.1), file E197259, plus cCSAus per CSA C22.2 No. 60950-1 and UL 60950-1. CE, C-Tick, DNV GL, and EAC approvals are on file. No ATEX, IECEx, FM, or UL hazloc — so not for explosive atmospheres. NEC Class 2 not met, so output wiring must follow Article 725 for Class 1 circuits.
Reliability & Quiescent Draw
MTBF at 40 °C is 517,015 hours — roughly 59 years. That's a solid number for a power supply in a controlled environment. Standby current: typical 0.6 mA, max 1 mA. Negligible for energy budgeting, but good to know for battery-backed or UPS-fed panels.