DIN Rail SMPS
EDR-120 120W DIN Rail Switching Power Supply
Input: 90–264VAC Universal (50/60Hz)
Output: 12V 10A / 24V 5A / 48V 2.5A
Protection: Short Circuit, Overload, Overvoltage
Product Catalog & Recommended Models
Featured Industrial & Rainproof Power Supplies for the Philippine Market
Field-tested across Philippine utility infrastructure, digital Out-Of-Home (OOH) billboards, factory automation, and heavy marine ports. Compliant with universal wide-voltage inputs and standard 60Hz line frequencies.
Step-Shape Profile
HDR-100 100W Industrial DIN Rail Power Supply
Input: 85–264VAC Universal Input
Output: 12V / 24V / 48V Industrial Single
Enclosure: Isolation Class II, Plastic TS-35
Low Profile Enclosed
LEYU LRS-150-24 150W 24V 6.5A AC DC SMPS
Input: 115V / 230VAC Switch Selectable
Output: 24V DC @ 6.5A Continuous
Thermal: Convection Cooled 1U Chassis
High Power / Adjustable
3000W High Voltage DC Power Supply 110V 27.3A
Input: 220V/230VAC 60Hz Grid Compatible
Output: 0-110V DC Adjustable, 27.3A Max
Application: Heavy Industrial & Battery Bank Charging
Industrial Automation
LEYU LRS-150-24 AC-DC SMPS for LED & Control
Form Factor: Metallic Perforated Housing
Output: 24V DC Constant Voltage Stability
Aging: 100% Full Load Burn-In Screened
IP67 Waterproof Outdoor
100W IP67 Waterproof LED Driver 12V/24V
Ingress: Fully Potted IP67 Submersion Tested
Housing: Anodized Anti-Oxidation Aluminum
Surge: Enhanced 4kV Line-to-Earth Protection
OOH Signage Rated
LDV-100 100W IP67 LED Driver 12V 8.3A / 24V 4.2A
Efficiency: Up to 89% Conversion Efficiency
Environment: -30°C to +70°C Tropicalized Rating
Cable: UV-Resistant Outdoor Rubberized Leads
Wide Frequency 60Hz
100W Industrial AC/DC SMPS (50Hz/60Hz Compatible)
Design: Heavy-Duty Chassis with Tropical Varnishing
Grid: Engineered for Fluctuating Island Feeds
Certification: CE Marked, RoHS & ISO9001 Factory
18+
Years SMPS Engineering Experience
TÜV
Rheinland Onsite Verified Manufacturer
100%
Full-Load Thermal Burn-In Screening
44+
Skilled Technical & Engineering Staff
Engineering White Paper · Market Context
Navigating the Demanding Power Supply Ecosystem in the Philippines
Procuring industrial switching power supplies (SMPS) and outdoor rainproof power units for installations in the Republic of the Philippines demands a far deeper understanding of local electrical topology, environmental stress profiles, and statutory standards than standard off-the-shelf consumer sourcing. Unlike standardized temperate climates in Western Europe or continental North America, the Philippine archipelago presents a unique nexus of extreme tropical weather, high atmospheric salinity, severe harmonic distortion, and distinctive electrical grid configurations.
1. The 230V 60Hz Single-Phase and Delta Grid Conundrum
A primary failure mode for imported power conversion equipment in the Philippines stems from power line discrepancies. While much of Southeast Asia operates on a 220V–240V 50Hz single-phase (Line-to-Neutral) system, the Philippine distribution network adheres to 230V at 60Hz as codified by the Philippine Electrical Code (PEC) and the Energy Regulatory Commission (ERC). Furthermore, across vast swathes of Metro Manila (served by Meralco) and older industrial economic zones, legacy distribution networks utilize a 230V three-phase ungrounded or corner-grounded Delta system or 230V Line-to-Line configurations where both supply legs carry 115V relative to earth ground rather than a neutral conductor at zero potential.
Standard power supplies equipped with asymmetric single-pole fuse lines or inadequate line-to-earth metal oxide varistors (MOVs) suffer rapid dielectric breakdown or persistent ground leakage tripping when subjected to these Line-to-Line configurations. Yueqing Keldan Technology Co., Ltd. addresses this through tailored OEM/ODM engineering: deploying dual-fuse input architectures, symmetric common-mode choke filtering, and 300V continuous working-voltage rated varistors that effortlessly tolerate voltage floating and transient surges without catastrophic short-circuits.
2. Tropicalization Against Monsoon Typhoons, Salt Fog, and Relative Humidity
Classified under the Köppen climate classification as predominantly tropical rainforest (Af) and tropical monsoon (Am), the Philippines experiences an average of twenty tropical cyclones annually (monitored by PAGASA), accompanied by the torrential southwest monsoon (Habagat). Ambient relative humidity consistently fluctuates between 80% and 98%, while outdoor surface temperatures inside non-ventilated sign cabinets or rooftop junction boxes regularly spike beyond 55°C.
In coastal manufacturing hubs and logistics centers—such as the Subic Bay Freeport Zone, Batangas Port, Cebu IT Park, and Davao International Container Port—the atmosphere carries dense airborne oceanic salt ions (sodium chloride and magnesium sulphate). Unprotected switch-mode circuitry succumbs quickly to electrochemical migration (ECM), dendritic copper growth across high-density circuit traces, and electrolytic capacitor vent seal degradation. Keldan's OEM rainproof and waterproof product lines integrate automated triple-pass IPC-CC-830B compliant conformal coatings, hermetically potted high-grade epoxy/silicone thermal elastomers, and corrosion-resistant marine-grade anodized aluminum alloy housings.
Engineering Comparison Matrix
Rainproof (Canopy Style) vs. Potted IP67 Waterproof Power Supplies
Choosing the right ingress protection envelope ensures optimal trade-offs between component longevity, thermal dissipation, procurement expenditure, and field serviceability.
| Technical Characteristic | OEM Rainproof Power Supply (Louvered/Canopy) | OEM IP67 Fully Potted Waterproof Driver | DIN Rail Tropicalized Module (TS-35) |
|---|---|---|---|
| Ingress Protection Rating | IP33 to IP54 (Rainproof Canopy) | IP67 to IP68 (Hermetic Submersible) | IP20 with Conformal Varnish |
| Cooling Mechanism | Natural convection + internal baffle labyrinth | Complete potting conduction via aluminum shell | Free air convection (vertical chimney design) |
| Thermal Dissipation Efficiency | High; minimal thermal derating up to 45°C ambient | Moderate; requires conductive heatsinking at high loads | High; standard industrial derating past 50°C |
| Typhoon Wind-Driven Rain Resistance | High (when mounted strictly vertically) | Absolute; impervious to 360-degree high-pressure jets | Requires external NEMA 4X / IP66 enclosure |
| Saline Fog & Humidity Immunity | Requires internal PCB conformal anti-fungal spray | Absolute immunity; components sealed in solid resin | Requires dual IPC-compliant varnish dips |
| Primary Philippine Application | OOH Building Billboards, Neon Signs, Marquees | Underground Lighting, Architectural Façades, Washers | PEZA Factory Control Cabinets, PLC Automation |
| Maintenance & Field Repair | High; serviceable internal components and fuses | Low; solid-state unit replaced as single assembly | High; quick modular TS-35 snap removal |
Archipelago Deployment
High-Impact Industrial & Infrastructure Applications in the Philippines
From the high-density expressways of Metro Manila to off-grid renewable microgrids in the Visayas, Keldan power solutions power critical commercial infrastructure.
Out-of-Home (OOH) LED Displays along EDSA & C-5
Metro Manila's Epifanio de los Santos Avenue (EDSA) and Circumferential Road 5 host some of the world's most vibrant digital billboard displays. These massive installations face non-stop exposure to toxic diesel exhaust, intense solar radiation during dry months, and sudden cloudburst deluges. Our LDV-100 and customized rainproof constant-voltage 5V/12V/24V SMPS units deliver stable, ripple-free current preventing visible pixel flicker and premature LED diode burnouts while dissipating heat effectively through top-canopy overhang louvers.
PEZA Special Economic Zones & Electronics Manufacturing
Industrial parks across Laguna Technopark, Cavite Export Zone, Clark Freeport, and Carmelray accommodate leading semiconductor, automotive harness, and electronics assemblers. Our EDR-120 and HDR-100 DIN Rail series snap directly onto standard TS-35 mounting systems in industrial automation racks. They deliver ultra-low electromagnetic interference (EMI) compliant with EN 55032 Class B, ensuring sensitive programmable logic controllers (PLCs) and robotics experience zero logic glitches.
Island Solar Hybrid Microgrids & BPO Backup Systems
Across Palawan, Mindoro, and the Visayas islands, decentralized microgrids combine solar photovoltaic arrays with battery banks and backup diesel generators. In parallel, massive Business Process Outsourcing (BPO) facilities in Bonifacio Global City (BGC) and Cebu IT Park depend on zero-downtime DC power backups. Keldan's 3000W adjustable SMPS, pure sine wave power inverters, and PWM solar controllers ensure battery banks remain accurately floated without overcharging during ambient heat waves.
Strategic Market Analysis
Philippine Market Trends Shaping Power Supply Procurement (2025–2030)
Procurement teams, electrical contractors, and system integrators operating in the Philippines are transitioning away from unbranded generic power units toward certified, traceable OEM/ODM partnerships. This paradigm shift is accelerated by key regulatory, economic, and technological developments:
1. Accelerated Infrastructure Investments Under 'Build-Better-More'
The Philippine government's ambitious infrastructure program—spearheaded by landmark investments such as the Metro Manila Subway Project (MMSP), North-South Commuter Railway (NSCR), and widespread airport modernizations—has codified stringent electrical safety and reliability benchmarks. Auxiliary power supplies deployed in tunnel signaling, perimeter security cameras, passenger information display systems (PIDS), and automated fare collection gates must satisfy rigorous thermal endurance and vibration resistance standards (IEC 60068-2-6) to withstand railway oscillation and seismic activity.
2. Transition to Smart Municipal Street Lighting & Connected Signage
Local Government Units (LGUs) across Quezon City, Pasig, Davao, and Bacolod are rapidly replacing legacy high-pressure sodium (HPS) fixtures with smart, networked LED luminaires. These outdoor luminaires require rainproof and IP67 waterproof drivers featuring built-in 0–10V or DALI dimming protocols, universal 90–305V surge-tolerant AC inputs, and active Power Factor Correction (PFC > 0.95). High PF drivers dramatically lower reactive power penalty charges levied by distribution utilities like Meralco, Visayan Electric (VECO), and Davao Light.
3. Mandatory Adherence to Bureau of Philippine Standards (BPS) & PNS IEC Benchmarks
The Department of Trade and Industry (DTI) and the Bureau of Customs (BOC) have intensified enforcement regarding the importation of electrical apparatus. Switching power supplies intended for commercial and residential integration must demonstrate strict adherence to Philippine National Standards (PNS), harmonized with IEC 61347-1, IEC 61347-2-13 (for LED drivers), and IEC 62368-1 (for audio/video and IT equipment). Sourcing directly from an established manufacturer with verified CE marks, third-party factory inspection audits, and comprehensive test documentation ensures seamless customs clearance without seizure risk.
Manufacturing Excellence
Why Yueqing Keldan Technology Co., Ltd. is Your Trusted OEM/ODM Partner
Headquartered in Yueqing, Wenzhou—China's preeminent electrical equipment capital—Keldan brings 18+ years of dedicated power electronics craftsmanship directly to Philippine distributors and OEMs.
High-Speed Precision SMT Placement
Multi-Zone Reflow Soldering
100% Automated Optical Inspection (AOI)
100% Full-Load Thermal Burn-In Testing
TÜV Rheinland Audited
Onsite-verified manufacturing facility confirming rigorous ISO-standard management, production lines, and traceable QA/QC documentation.
Zero-Defect Quality Gates
Every power supply passes 8 distinct inspection gates: IQC raw material screening, SMT, AOI, manual debugging, 4-hour burn-in, and OQC final release.
Comprehensive OEM/ODM
Full mechanical and electrical customization: custom output voltages, multi-channel outputs, specialized terminal blocks, private silk-screening, and packaging.
Fast Maritime Logistics
Dedicated 12-person export division coordinating direct container and LCL shipments from Ningbo/Shanghai ports directly to Manila South Harbor or Cebu Port in 7–10 days.
Procurement & Technical Q&A
Frequently Asked Questions by Philippine Electrical Buyers & Engineers
Key answers addressing grid voltage tolerances, import paperwork, ingress testing, and warranty protection for Philippine engineering contracts.
Can Keldan power supplies operate stably on the Philippine 230V 60Hz grid?
Yes. While many standard power supplies manufactured for domestic China or European grids are optimized specifically for 50Hz, Keldan power supplies are engineered with wide-range magnetic transformers and high-frequency switching controllers that operate seamlessly across 47Hz to 63Hz. Furthermore, our units accommodate universal AC inputs (typically 85V–264VAC or 176V–264VAC), allowing them to shrug off severe brownouts and voltage sags common during peak load hours in Metro Manila and provincial distribution cooperatives.
What is the difference between Rainproof and Waterproof power supplies for outdoor billboard signs?
Rainproof power supplies (often rated IP33 to IP54) utilize a physical hooded metal enclosure with downward louvers. They rely on gravitational runoff to block downward-falling rain while preserving open air convective cooling. They are cost-effective for large vertical OOH billboards. In contrast, IP67 waterproof power supplies are hermetically potted in thermally conductive silicone or epoxy resin. They can withstand torrential typhoon wind-driven rain, horizontal water jets, and even temporary submersion. For high-wind coastal billboards or humid ground-level landscape lighting, fully potted IP67 units are strongly recommended.
How does Keldan address high ambient temperatures (35°C–45°C) inside outdoor enclosures in the Philippines?
High ambient heat combined with solar gain can drive internal junction box temperatures above 60°C. Keldan uses high-grade 105°C-rated long-life electrolytic capacitors (from reputable tier-1 suppliers), generously oversized power MOSFETs with low drain-source on-resistance (RDS(on)), and premium thermal pads coupled to extruded aluminum chassis. We provide published thermal derating curves to allow your system designers to size headroom appropriately (typically recommended at 20% to 30% load margin for tropical longevity).
What documentation is provided for Philippine Customs (BOC) and DTI / BPS compliance?
We provide full commercial documentation required for customs clearance through the Port of Manila (MICP / South Harbor), Subic, or Cebu, including detailed Commercial Invoices, Packing Lists with accurate HS Codes (typically under 8504.40), Bills of Lading (B/L), Certificates of Origin (Form E for preferential trade tariffs under ACFTA), and full CE Declaration of Conformity and factory test reports corresponding to IEC/EN safety and EMC standards.
What are the typical Minimum Order Quantities (MOQ) and lead times for OEM/ODM orders to the Philippines?
For standard catalog items (such as EDR-120, HDR-100, LRS series, and standard IP67 LED drivers), sample orders are available from 1 unit, with standard production batch MOQs ranging from 10 to 50 pieces. For custom OEM/ODM projects (custom PCB layouts, specific metalwork enclosures, private branding, or specialized voltage configurations), MOQs typically start at 200 to 500 units depending on complexity. Production lead times range from 7 to 15 working days, with sea freight to Manila taking only 7 to 10 days.
What warranty and post-sale engineering support is extended to Philippine B2B partners?
All Keldan industrial switching power supplies and outdoor rainproof drivers are backed by a standard 2-year to 3-year factory warranty. Every unit is assigned a traceable batch tracking code. In the rare event of premature field failure, our engineering group conducts comprehensive root-cause failure analysis (FA) based on return samples or photographic/oscilloscope data, providing immediate replacement units in your subsequent shipment batch or credit notes.
Build Your Tropical-Resilient Power Systems with Keldan
Whether you require standard 12V/24V IP67 LED power supplies for a nationwide digital billboard roll-out, TS-35 DIN rail units for a PEZA automation expansion, or custom rainproof power supplies engineered for 230V 60Hz delta lines, our engineering team is ready to assist.
