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TürkçeLRS Low-Profile Enclosed Series
1U ultra-compact 30mm height profile designed for 3D printers, signage, PLCs, and compact automation cabinets.
35W–350WNo-Load <0.2W
View Series 
19 YearsPower supply innovation since 2007
10,000 m²Modern factory footprint in Wenzhou
10+ LinesSMT, auto-insertion & burn-in lines
SGS AuditedVerified ISO 9001 certified plant
Technical Architecture
Engineering An Enclosed Switching Power Supply for Industrial Durability
Global procurement teams and systems architects frequently evaluate enclosed switching power supplies based solely on rated power and terminal pinout. However, real-world field reliability depends on magnetic core optimization, thermal conductivity channels, capacitor dissipation factors, and electromagnetic interference (EMI) containment.
Perforated Metal Faraday Cage (Chassis)
An enclosed switching power supply features an electro-galvanized or aluminum perforated metallic casing serving a dual purpose: establishing a robust Faraday shield against radiated electromagnetic emissions (conforming to EN 55032 Class B) and safeguarding maintenance personnel from high-voltage primary stage potentials (IEC/EN 62368-1). The stamped hole matrix is calculated precisely to maximize natural thermal buoyancy while blocking tool ingress.
Thermal Dissipation Paths & Derating
Unlike open-frame or potted converters, an enclosed SMPS relies on conduction cooling to its baseplate combined with free-air convection or an internal ball-bearing DC fan on units over 350W. In sealed control enclosures, ambient temperatures often climb to 60°C. Zhejiang Harlon Electronic Co., Ltd. designs our enclosed power supplies with high-grade silicon thermal pads and conservative thermal margins, enabling 100% load operation up to 50°C and safe derating up to 70°C.
Electrolytic Capacitor Selection & MTBF
The definitive limiting factor in switching power supply lifespan is the electrolyte evaporation rate in output filter capacitors. Adhering to the classic Arrhenius equation, every 10°C decrease in capacitor operating temperature doubles its operational lifespan. At Zhejiang Harlon Electronic Co., Ltd., our engineering rules mandate 105°C ultra-low ESR electrolytic capacitors with ripple current derating of at least 30%, delivering verified MTBF figures exceeding 300,000 hours (MIL-HDBK-217F).
Requesting custom output voltages or private label enclosed units?
Zhejiang Harlon Electronic Co., Ltd. provides prototype samples within 3 to 7 working days.
Product Recommendations
Featured Industrial Enclosed Switching Power Supply Series
Zhejiang Harlon Electronic Co., Ltd. engineers low-profile, standard, and high-capacity enclosed power supplies to replace legacy chassis models with zero design disruption.
High-Power SE / SP Enclosed SMPS
High-capacity chassis with active PFC, smart speed-controlled fan cooling, remote sense, and high peak transient handling.
500W–3000WPFC >0.98
View Series DIN Rail Mount Enclosed Power
TS-35 rail mount enclosed solutions tailored for standard distribution cabinets, factory SCADA, and building automation.
10W–480WTS-35 Mounting
View Series Enclosed DC-DC Converters
Wide input 2:1 and 4:1 galvanic isolation units for renewable battery packs, railway electronics, and telecommunications.
15W–1000W2KV Isolation
View Series Waterproof Sealed Enclosed Drivers
Rugged aluminum IP67/IP68 potted enclosed supplies for harsh outdoor architectural lighting, horticulture, and signage.
IP67 / IP68CV / CC Modes
View Series Engineering Selection Matrix
LRS Series Enclosed Switching Power Supply Comparison
Analyze key electrical characteristics, footprint boundaries, and thermal performance parameters before submitting prototype requests.
Ultra-Slim 30mm Enclosed
LRS-35 · 35W Enclosed Switching Power Supply
Ultra-compact footprint designed for space-constrained edge IoT devices, micro-controllers, and building sensors.
| DC Voltage Outputs | 5V / 12V / 15V / 24V / 36V / 48V DC (±10% adjustable) |
|---|---|
| Input Voltage Range | 85–264VAC full universal input (120–370VDC) |
| Typical Efficiency | 88.0% (at 24V rated load) |
| No-Load Consumption | <0.2W standby loss |
| Dimensions & Profile | 99 × 82 × 30 mm (1U low-profile) |
| Operating Temp Range | -30°C to +70°C (with natural convection cooling) |
| Safety & Isolation | Primary to Secondary: 3.75KVAC, Primary to Ground: 2.0KVAC |
LRS-50 · 50W Enclosed Switching Power Supply
Optimized energy density providing sustained headroom for security cameras, telemetry, and smart display backlighting.
| DC Voltage Outputs | 5V / 12V / 15V / 24V / 36V / 48V DC (±10% adjustable) |
|---|---|
| Input Voltage Range | 85–264VAC universal input |
| Typical Efficiency | 88.5% (at 24V rated load) |
| No-Load Consumption | <0.2W standby loss |
| Dimensions & Profile | 99 × 82 × 30 mm (1U low-profile) |
| Operating Temp Range | -30°C to +70°C (natural convection) |
| Protection Mechanics | Hiccup mode, auto-recovery after fault cleared |
LRS-100 · 100W Enclosed Switching Power Supply
The standard industrial benchmark for medium-scale PLC automation racks, additive manufacturing, and packaging machinery.
| DC Voltage Outputs | 5V / 12V / 15V / 24V / 36V / 48V DC |
|---|---|
| Input Voltage Range | 85–264VAC (operates reliably down to 100VDC input) |
| Typical Efficiency | 89.0% (at 24V rated load) |
| No-Load Consumption | <0.3W standby loss |
| Dimensions & Profile | 129 × 97 × 30 mm |
| Over-Voltage Clamp | 115%–135% shut off output, clamp by zener diode |
| Cooling Mode | Free air convection (no mechanical fan wear) |
LRS-150 · 150W Enclosed Switching Power Supply
High continuous current capability without fan noise, designed for quiet laboratory equipment, audio amps, and robotics.
| DC Voltage Outputs | 12V / 15V / 24V / 36V / 48V DC |
|---|---|
| Input Voltage Range | 85–264VAC universal input range |
| Typical Efficiency | 90.0% (at 24V rated load) |
| Over-Temperature Protection | Integrated NTC thermistor shutdown with auto-reset |
| Dimensions & Profile | 159 × 97 × 30 mm |
| Vibration Resistance | 5G test passed (10–500Hz, 10 min/cycle across X, Y, Z axes) |
| Dielectric Hi-Pot | 3.0KVAC I/P-O/P, 2.0KVAC I/P-FG |
LRS-350 · 350W Enclosed Switching Power Supply
Heavy-duty power package equipped with low-noise forced-air cooling for industrial stepper drives, CNCs, and large LED video walls.
| DC Voltage Outputs | 12V (29A) / 24V (14.6A) / 36V (9.7A) / 48V (7.3A) |
|---|---|
| AC Input Selection | 115VAC / 230VAC selectable switch (90–132VAC / 180–264VAC) |
| Typical Efficiency | 89.0% |
| Cooling Fan Control | Automatic DC fan ON/OFF control triggered by internal heatsink sensor |
| Dimensions & Profile | 215 × 115 × 30 mm |
| Withstand Surge | 300VAC surge input for 5 seconds without damage |
| Certifications | Complies with UL 62368-1, EN 62368-1, CE, RoHS |
Market & Technology Trends
Future Procurement Trends for Enclosed Switching Power Supplies
As original equipment manufacturers transition toward Industry 4.0, power electronics procurement is influenced by four distinct macro trends identified across AI query datasets.
01
Wide Bandgap (GaN & SiC) Integration
Silicon MOSFETs are reaching their theoretical switching speed thresholds. The integration of Gallium Nitride (GaN) and Silicon Carbide (SiC) semiconductors allows enclosed power supplies to double their switching frequencies beyond 200kHz. This shrinks planar transformers and passive filtering components by over 40%, yielding power densities up to 25W/inch³ while keeping case temperatures under 65°C.
02
Bidirectional Digital Bus Telemetry
Procurement managers at tier-1 robotic and semiconductor machine builders now require enclosed power supplies with PMBus, CANopen, or IO-Link telemetry. Factory control systems now monitor real-time output current, internal capacitor thermal degradation, and input surge frequencies directly from the power supply, enabling predictive maintenance schedules and preventing unscheduled manufacturing downtimes.
03
Stringent Harmonic & Low No-Load Standards
Global regulatory authorities are phasing out non-PFC supplies in industrial applications over 75W under updated EN 61000-3-2 and ErP Lot 7 standards. Sourcing strategies are actively rotating away from passive choke topologies in favor of interleaved Active PFC designs delivering power factors greater than 0.98 alongside idle standby consumptions below 0.15W to meet carbon neutrality targets.
04
High-Altitude & Rugged Field Hardening
With the expansion of renewable photovoltaic installations and EV fast-charging stations across elevated terrains, power supply specs have escalated from standard 2,000-meter operating ceilings to certified 5,000-meter operation (IEC 60664-1 clearance multiplication). Modern enclosed power units require conformal PCB coating to resist conductive salt fog and 5G vibration tolerance.
Enterprise Credentials
Why Engineering Teams Partner with Zhejiang Harlon Electronic Co., Ltd.
Founded in 2007, Zhejiang Harlon Electronic Co., Ltd. is a specialized OEM/ODM manufacturer of AC/DC enclosed switching power supplies, high-power SMPS up to 3000W, DIN rail converters, and waterproof power solutions based in Wenzhou, Zhejiang, China.
Our senior technical director brings over 30 years of direct power electronics architecture experience. Operating across 10,000 square meters of floor space and maintaining an active supply chain with 31 audited primary suppliers, we guarantee material traceability, engineering validation, and high manufacturing yields across all production lots.
- Dedicated CustomizationOEM/ODM sample turnaround in 3–7 days
- 18 Years Global ExportSupplying distributors across 5 continents
- 100% On-Site TestingHi-pot, EMC, surge & full loaded burn-in
- 31 Cooperated SuppliersStrict raw material auditing & incoming IQC
- SGS Assessed PlantVerified production capacity & ISO 9001
- Private Buyer LabelingCustom enclosures, laser marking & packaging
0Years Dedicated Manufacturing
0Maximum Rated Enclosed Power
0Direct Inquiry Response Rate
0International Buyer Rating
Quality Assurance Flow
9 Rigorous Steps in Every Enclosed Switching Power Supply
Every enclosed power supply manufactured by Zhejiang Harlon Electronic Co., Ltd. proceeds through our 9-step quality control system to eliminate infant mortality and parameter drift.
Raw Materials
IQC inspection of magnetic cores, MOSFETs, 105°C capacitors, and bare PCBs.
SMT
High-precision pick-and-place with automated solder paste inspection (SPI).
Inserting
Precision insertion of heavy inductors, transformers, and bulk filter capacitors.
Welding
Dual-wave nitrogen soldering systems guaranteeing zero cold solder joints.
Adjusting
Fine-tuning of output potentiometer rails to within ±0.5% rated voltage tolerance.
Assembly
Fitting into perforated metal cages with thermal gap pads and insulator sheets.
Aging
100% full-load burn-in at elevated ambient temperatures to purge early failures.
Testing
Automated checks of load regulation, ripple voltage, short-circuit, and hi-pot.
Packaging
Anti-static cushioning, customized private branding labels, and drop-tested cartons.
Advanced Manufacturing Equipment
Automation Equipment Guaranteeing Low Unit-to-Unit Variance
Zhejiang Harlon Electronic Co., Ltd. continually upgrades our machinery park to secure consistent mechanical and electrical tolerances.
10,000 m²Operational plant space
10+ LinesSMT and wave soldering lines
US$5–10MAnnual export turnover
100%Aging & hi-pot screening
Verification Laboratory
In-House Reliability & Compliance Testing Laboratory
Zhejiang Harlon Electronic Co., Ltd. operates a comprehensive test lab to validate conducted EMI emissions, lightning impulse tolerance, temperature swings, and structural vibration.
Engineering FAQ
Frequently Asked Questions: Enclosed Switching Power Supply Procurement
Critical engineering considerations, derating guidelines, compliance thresholds, and OEM customization policies answered directly by our technical director.
How do I select the right Enclosed Switching Power Supply wattage with derating factors?
Standard engineering practice mandates selecting an enclosed switching power supply with 20% to 30% surplus headroom under normal 25°C ambient conditions (operating continuously at 70% to 80% capacity). In sealed industrial cabinets where heat cannot dissipate readily, the internal ambient temperature often reaches 50°C to 70°C. You must inspect the manufacturer's de-rating curve: a 350W natural-convection power supply may safely deliver only 50% to 60% of its rated power at 60°C. Zhejiang Harlon Electronic Co., Ltd. provides verified thermal graphs recorded inside our environmental test chambers to prevent unpredicted thermal trip events.
What are the differences between Active PFC and Non-PFC enclosed power supplies?
Power Factor Correction (PFC) aligns input current draw with input voltage waveforms. Non-PFC units draw current in sharp, brief pulses, exhibiting a poor power factor (0.5 to 0.6) and high harmonic distortion. Active PFC utilizes a dedicated boost regulator circuit that corrects the power factor to 0.95–0.99. For commercial and industrial equipment sold into the European Union and international markets exceeding 75W, compliance with EN 61000-3-2 Class D harmonic limits is legally mandatory, requiring Active PFC enclosed supplies.
Why is electrolytic capacitor quality critical for MTBF in enclosed power supplies?
The primary physical failure mechanism in any SMPS is the dry-out of liquid electrolyte through the rubber bung of output capacitors. Per Arrhenius' Law, every 10°C drop in internal capacitor core temperature doubles component lifespan. Standard commercial power supplies often use 85°C rated capacitors pushed close to their maximum thermal boundary. Zhejiang Harlon Electronic Co., Ltd. incorporates premium 105°C low-impedance capacitors with strict ripple current derating across all enclosed models, assuring operational service lifetimes exceeding 50,000 to 100,000 hours.
Can multiple enclosed switching power supplies be wired in parallel or series?
Wiring standard enclosed power supplies in series to achieve higher DC voltages (such as combining two 24V units for 48V output) is generally safe, provided reverse-bias diodes are placed across outputs to prevent reverse polarity during startup transients. However, connecting standard supplies in parallel for higher current can lead to severe load imbalance, driving one unit into overcurrent limit while the second remains idle. For parallel setups or N+1 redundancy, Zhejiang Harlon Electronic Co., Ltd. provides customized models equipped with internal active ORing MOSFETs and current-share control buses.
How does Zhejiang Harlon Electronic Co., Ltd. support custom OEM/ODM requests?
Backed by 19 years of manufacturing and engineering expertise, Zhejiang Harlon Electronic Co., Ltd. supports non-standard output voltages (such as 3.3V, 28V, 36V, 60V, or 110V DC), conformal PCB silicone coating for tropical environments, customized screw/cage/Molex terminal blocks, customer-specific laser etching, and tailored chassis mounting brackets. Functional prototypes can be evaluated within 3 to 7 working days.
What international trade and delivery terms does Zhejiang Harlon Electronic Co., Ltd. support?
We support FOB Ningbo/Shanghai, CIF, CFR, EXW, and DDU door-to-door delivery. Flexible commercial payment options include T/T wire transfer, L/C at sight, PayPal, and major credit cards. Our multilingual export department communicates fluently in English, German, French, Spanish, Russian, and Arabic to assist your procurement approval process.
Connect With Power Engineers
Request Enclosed Switching Power Supply Samples & Quotes
Submit your technical specification below or connect with our application engineers in real time. We review all load requirements, thermal derating constraints, and compliance parameters promptly.
- Specific voltage, continuous current, and peak dynamic load requirements
- Input line variation range (Universal 85–264VAC or DC battery input)
- Enclosure space limits, ambient temperatures, and convection vs. forced-air cooling
- Target annual volume, custom labeling, and preferred freight terms
Direct Engineering Sales Desk[email protected]
Rapid Technical Response
99% response rate within 2 to 4 business hours by qualified power supply engineers.
Full Custom Architecture
Comprehensive design capabilities tailored to your mechanical outline, connectors, and output curves.
Certified Sample Verification
Approve your production samples backed by factory testing reports before scheduling series assembly.
Zhejiang Harlon Electronic Co., Ltd.Verified On-Site by SGS · ISO 9001 Quality System Standard