500W 24V 20A Switching Power Supply AC/DC Single Output (90–264VAC)
500W / 24VDC
20A Continuous
Heavy Machinery
Product Catalog
Precision Power Solutions Engineered for Industrial Racks & Sub-Panels
Direct from our TÜV Rheinland-audited manufacturing facilities: high-efficiency DIN rail power supplies, low-profile converters, and high-wattage laboratory rectifiers tailored for machine builders and systems integrators in Lausanne.
100W Industrial AC/DC Switching Power Supply Wide Voltage Input 50/60Hz
100W Output
Universal AC
Sub-metering
SP-500-12 12V 40A 500W Power Supply Active PFC & Cooling Fan
Active PFC >0.95
12V / 40A
Automation & LED
LEYU EDR-240-24 DIN Rail Power Supply 24V 10A 240W Active PFC
TS-35 Rail Mount
24V / 10A
Cabinet PLCs
EDR-240-24 Industrial DIN Rail PSU Slim Design 95% Efficiency
Ultra Slim Profile
Efficiency 95%
Clean Rooms
3000W Lab Bench Variable PSU 0-24V / 0-48V / 0-110V AC/DC
3000W Scalable
0-110V Variable
EPFL Labs / R&D
Industrial Adjustable DC Power Supply 3000W 48V 60A Battery Charger
48V / 60A
Battery Float Charge
Micro-Grid Systems
HDR-30 30W Step-Shape DIN Rail Power Supply Universal AC Input
Ultra Slim 1SU (17.5mm)
Class II Isolation
BMS & IoT
E-E-A-T Regional Engineering Insights
Tailored Deployment Across the Lausanne Precision Ecosystem
As the cultural and economic backbone of the Canton of Vaud, Lausanne brings together world-class academic research (EPFL), precision medtech, robotic packaging plants, and lake-water district heating grids. Such sophisticated setups demand ripple-free DC rails and unwavering MTBF.
EPFL Innovation Park & Medtech Laboratories
Biomedical testing equipment and high-precision micro-sensors around Lausanne require extremely clean secondary outputs. Our HDR and EDR series feature ultra-low residual ripple (<50mVp-p), high dielectric isolation (3kVAC), and compliance with EN 60601-1 auxiliary standards to eliminate ground loops in microfluidic analyzers.
Where variable DC profiles are needed for sensor life-cycle testing, our 3000W programmable units supply smooth linear-like ramp rates via isolated control interfaces.
Automated Packaging & Watchmaking Assembly
In the wider Lausanne–Morges–Yverdon precision corridor, automated pick-and-place arms and automated visual inspection systems run around the clock. Rapid cycling of DC solenoid valves and servo drives creates sharp inductive back-EMF and short-duration current surges.
Keldan’s EDR-240-24 and DRP series provide 130–150% peak power headroom for 3 seconds, eliminating nuisance dropouts and unneeded cabinet derating without demanding oversized external inductors.
Smart Energy & Lake Water Cooling (District Heating)
Lausanne’s ambitious municipal energy strategy leverages water heat pumps tapping Lake Geneva alongside extensive rooftop photovoltaic micro-grids. Control stations in damp utility tunnels experience substantial ambient temperature swings and elevated electrical transients.
Our ruggedized DIN supplies deliver a -20°C to +70°C operational window, conformal-coated PCB options against condensation, and built-in active PFC (>0.95) to satisfy Romande Energie harmonic restrictions.
Market Intelligence & Regulatory Shifts
Engineering Compliance in Vaud: Power Supply Trends for 2025–2030
Swiss machine manufacturers and cabinet builders face rising power density requirements alongside strict European electrical safety (EN/IEC) directives. Meeting these expectations calls for deeper component integration.
Cabinet Miniaturization (TS-35 Form Factor)
Real estate inside electrical enclosures across Swiss factories comes at a severe premium. Legacy 240W power supplies historically consumed 80mm to 100mm of DIN rail width. Next-generation designs must pack identical wattage into ultra-slim 40mm enclosures, relying on synchronous rectification topologies and advanced heat sinking.
High Energy Efficiency & Carbon Footprint Limits
Switzerland’s Energy Strategy 2050 incentivizes every percentage point of electrical conservation. Standard SMPS models exhibiting 85% efficiency lose 15% of rated power directly as heat inside the cabinet, inflating HVAC and cabinet fan runtimes. Shifting toward 93%–95.2% efficiency designs trims thermal load and protects nearby electronics.
Severe EMC Immunity Requirements
Co-locating variable frequency drives (VFDs), servo controllers, and multi-axis robotics creates intensive high-frequency electromagnetic interference. Power converters deployed in Lausanne panels must comply with EN 61000-6-2 (Industrial Immunity) and maintain class B conducted radiation under EN 55032 without requiring auxiliary external filter stages.
| Topological Parameter | Legacy Switching Designs (Industrial) | Keldan EDR / HDR High-Density Units | Vaud/Swiss Engineering Value Benefit |
|---|---|---|---|
| Typical Conversion Efficiency | 82% – 86% | 93.0% – 95.2% | Reduces panel interior heat; prevents premature aging of adjacent PLCs. |
| Chassis Width (240W 24V) | 85 mm – 110 mm | 40 mm – 43 mm (Slimline) | Saves over 50% TS-35 space for additional relays, fuses, and Ethernet switches. |
| Power Factor Correction | Passive (PF ~0.65) or Uncorrected | Active PFC (PF > 0.95 at 230VAC) | Full compliance with EN 61000-3-2 harmonic limits; avoids utility line clean-up fees. |
| Burn-In Qualification | Batch Sampling (1-2 hours) | 100% Full-Load Automated Burn-In | Ensures early-life infant mortality defects are identified at the factory floor. |
Manufacturing Heritage
Yueqing Keldan Technology Co., Ltd.
Located in the heart of China’s premier electrical apparatus manufacturing cluster in Yueqing, Zhejiang, Keldan pairs 18+ years of dedicated power electronics design with transparent third-party oversight. Rather than acting as a simple trading middleman, we operate complete surface-mount, mechanical assembly, and burn-in aging lines verified on-site by TÜV Rheinland.
- 44 Verified Staff On-Site
- TÜV Rheinland Audited
- Full AOI & SMT Assembly
- CE & RoHS Certified Units
- Dedicated R&D Engineering Team
- OEM/ODM Custom Tailoring
8-Step QA Protocol
Incoming raw inspection, SMT, reflow soldering, AOI optical test, manual assembly, debugging, full-load burn-in, and final release.
Low MOQ Flexibility
Standard catalog models sampled from 1 unit; custom voltages and terminal configurations available with low production minimums.
Export Infrastructure
12 export trade specialists ensuring compliant Swiss/EU customs documentation, HS classification, and DDP air/sea freight channels.
Field-Proven Topologies
Wide-range AC inputs (85–264VAC), over-voltage, overload, over-temperature, and short-circuit protections built in as standard.
Procurement & Technical FAQ
Frequently Asked Questions for Lausanne Buyers & Engineers
Clear, direct answers regarding compliance, tariffs, terminal blocks, lead times, and customization options for Western Switzerland.
Are Keldan DIN rail power supplies fully compliant with Swiss and European safety directives?
Yes. All standard DIN rail and switching power supplies manufactured by Keldan carry the CE mark and conform to relevant low-voltage directives (EN 62368-1 / EN 61010-1) and electromagnetic compatibility standards (EN 55032 Class B, EN 61000-3-2 Active PFC, EN 61000-6-2 industrial immunity). Complete test reports, declarations of conformity, and full-spectrum datasheets can be supplied directly to your quality assurance or verification team upon request.
How does Keldan address import procedures and customs duties for Swiss deliveries (Geneva / Lausanne)?
We maintain an experienced international trade team that coordinates logistics directly with leading air and sea forwarders servicing Zurich, Geneva, and Basel freight terminals. We provide full commercial invoices, certificates of origin, and explicit HS codes (8504.40) to streamline clearance through the Swiss Federal Office for Customs and Border Security (FOCBS). We routinely support EXW, FOB, CIF, or DDP shipments depending on your procurement framework.
Can your power supplies be configured in parallel or redundancy modes for critical industrial lines?
Yes. Our premium DIN rail series can be configured for N+1 redundancy systems or parallel current sharing to support continuous operation in mission-critical applications. For sensitive automation backbones, we recommend combining our units with external ORing diodes or active redundancy modules to ensure uninterrupted load handover should an AC feed experience instability.
What thermal derating rules apply when installing your PSUs in tight, fanless enclosures?
Our DIN rail modules are engineered for free-air natural convection cooling. When operating inside unventilated IP65/IP66 enclosures common in food processing or outdoor installations around Lake Geneva, we recommend maintaining 20mm horizontal spacing between adjacent components and 50mm clearance above and below the ventilation grilles. Under ambient temperatures exceeding +50°C, a linear derating of approximately 2.5% per °C should be accounted for unless forced-air cooling is present.
Do you accommodate OEM modifications such as special terminal types or custom voltage calibrations?
Absolutely. As an audited direct manufacturer, our on-site engineering team handles drawing-based and sample-based customizations. Common requests from European equipment builders include fine-tuned non-standard DC outputs (e.g., 28V, 36V, or 56V PoE rails), conformal PCB coating for humid environments, push-in spring-cage terminals instead of screw barriers, and custom private-label laser etching.
How does Keldan conduct burn-in quality testing before goods depart the factory?
Every individual power supply unit manufactured on our line passes through an 8-stage verification pipeline. Crucially, 100% of finished units undergo a full-load thermal burn-in aging process in dedicated burn-in chambers under high-line and low-line AC cycles. This screening weeds out early semiconductor infant mortality, ensuring our products maintain high reliability upon delivery to your workshop in Vaud.
Plan Your Next Automation Project with an Audited Factory Partner
Whether you require standard 24V DIN rail supplies for immediate machine builds or custom-engineered switch mode power electronics for advanced laboratory equipment, our engineering team provides complete datasheets, evaluation samples, and competitive direct-from-source quotations.
Contact Us