DIN Rail Power Supplies

Choosing DIN Rail Power Supplies components

DIN-rail PSU selection is mostly about width on the rail, current rating, and diagnostic features. In dense cabinets, the millimeters of rail occupancy matter — a supply that fits the same current rating in 32 mm vs. 90 mm of rail width may be worth a 30% price premium when cabinet space is tight.

Specs to confirm before ordering:

Output voltage and continuous current rating
Width on the DIN rail (typical 22.5 mm, 32 mm, 45 mm, 60 mm, 90 mm, 110 mm for higher current)
Input: 90–264 VAC universal, or 1+N+PE / 3+N+PE for three-phase supplies above ~10 A output
Efficiency at full load — 90–95% on modern QUINT and Puls; lower on budget supplies
Hold-up time (typically 20–30 ms; some up to 100 ms+ with built-in capacitor bank)
Output adjustment range via front trimmer
Diagnostic features: DC OK LED, DC OK relay, signal output for PLC, or SCADA integration via communication
Power boost / dynamic boost capability: short-term overload tolerance (e.g., 150% for 5 seconds for motor inrush)
Parallel and redundancy support
Wide-temperature operation if cabinet ambient exceeds 50 °C

Common gotchas: DIN-rail PSU mounting clips are 35 mm standard, but the clip's grip strength varies — some supplies need a manual lock-down step in addition to clipping. Front-mounted trim potentiometers can be inadvertently bumped during cabinet work; lock-down covers prevent this. Air-cooled supplies need clearance above and below for convection; mounting them in a stack without spacing reduces effective current rating. Three-phase input supplies require all three phases plus neutral on standard 3+N+PE wiring — running two phases of three trips the supply.

Typical applications: 24 VDC supply for control circuits in PLC cabinets, sensor and valve power, machine-builder OEM panels, and redundant PSU pairs (with diode module) for critical machine controls.

For obsolete DIN-rail PSUs, send the OEM part number for a sourcing quote.

Do you stock obsolete DIN-rail PSUs?

Yes. Discontinued Phoenix Contact QUINT first generations, retired Puls Dimension early codes, end-of-life 1606-XLP, and earlier Mean Well DR-series codes are sourced through our supplier network.

Single-phase vs. three-phase input — when is each appropriate?

Single-phase 120/240 VAC for outputs up to ~10–15 A at 24 VDC. Above that, three-phase input distributes load across all phases and avoids high single-phase current draw. Match to the existing cabinet supply.

What is "power boost" or "dynamic boost"?

Short-term overload capability above the continuous rating — typically 150% for 5 seconds, enough to handle motor starting or solenoid inrush without forcing the supply oversize. Useful in dynamic load applications.

Do I need a redundancy module?

For critical applications (safety PLCs, hot-standby controls), yes. Two parallel PSUs without a diode module do not provide redundancy — one back-feeds the other through its output. A redundancy diode module (also DIN-rail mounted) provides the isolation.

How tight should the PSU be mounted to adjacent components?

Most DIN-rail PSUs need 20–50 mm clearance above and below for convection cooling. Stacking without spacing reduces effective output current and shortens lifetime. Datasheets specify exact spacing.

What is the warranty?

12-month functional warranty. Damage from over-voltage on input, output short beyond protection, or insufficient cabinet ventilation is not covered.

DIN Rail Power Supplies

Autonics SPB-A015-12 DIN Rail Switching Mode Power Supplies

Autonics SPB-A015-24 DIN Rail Switching Mode Power Supplies

Autonics SPB-A030-05 DIN Rail Switching Mode Power Supplies

Autonics SPB-A030-12 DIN Rail Switching Mode Power Supplies

Autonics SPB-A030-24 DIN Rail Switching Mode Power Supplies

Autonics SPB-A120-24 DIN Rail Switching Mode Power Supplies

Autonics SPB-A240-12 DIN Rail Switching Mode Power Supplies

Autonics SPB-A240-24 DIN Rail Switching Mode Power Supplies

Autonics SPB-A240-48 DIN Rail Switching Mode Power Supplies

Banner PBAT415UHFMTA Fiber Optics

Banner PBAT46UHFMTA Fiber Optics

Can't Find The Part You Need?