48V (36-75V) In To 12V 10A 120W Isolated DC-DC Waterproof Step Down Converter Power Supply Module WGI10-48S12L

Product Overview The WGI10-48S12L is an industrial-grade isolated DC-DC step-down converter engineered specifically for demanding commercial and industrial environments where reliable 12V power is needed from a 48V nominal (36-75V) input source. Featuring galvanic isolation between input and output, this converter provides a critical safety barrier that protects sensitive downstream electronics from high-voltage transients, ground loops, and electrical noise — making it essential for telecommunications, solar energy systems, electric vehicles, and marine applications. Built with synchronous rectification technology, this converter achieves an impressive 92% efficiency at full load, minimizing heat generation and maximizing power delivery. The compact aluminum enclosure carries an IP65 waterproof rating, ensuring reliable operation in wet, dusty, and harsh outdoor environments. With a robust suite of built-in protections including short circuit, overcurrent, overvoltage, over-temperature, and reverse polarity protection, the WGI10-48S12L delivers worry-free performance in mission-critical installations. Key Features ✅ Wide Input Voltage Range: 36V to 75V DC — compatible with 48V nominal battery banks, solar arrays, and telecom power systems ✅ Galvanic Isolation: 1500V input-to-output isolation provides critical safety separation and eliminates ground loop issues ✅ High Efficiency: 92% typical efficiency at 48V input, full load — reduces heat and extends component lifespan ✅ High Power Density: 120W (12V @ 10A) output in a compact 110 × 70 × 23mm form factor ✅ IP65 Waterproof Rating: Sealed aluminum housing protects against dust ingress and water jets ✅ Comprehensive Protection Suite: Short circuit, overcurrent, overvoltage, over-temperature, under-voltage lockout, and reverse polarity protection ✅ Wide Operating Temperature: -40°C to +50°C ambient — rated for extreme environments ✅ Synchronous Rectification: Advanced topology for superior efficiency and reduced thermal dissipation ✅ Premium Internal Components: NCC & NICHICON capacitors for high reliability and long service life ✅ 100% Factory Burn-In Tested: Every unit undergoes full-load burn-in testing before shipment ✅ RoHS & CE Compliant: Meets international environmental and safety standards Specifications INPUT SPECIFICATIONS Input Voltage Range 36V – 75V DC Nominal Input Voltage 48V DC Maximum Input Voltage (Continuous) 78V DC Undervoltage Shutdown 30V – 36V (typical 31.5V), auto-recovery Maximum Input Current 5A (at 36V input, 10A output) No Load Input Current 80mA – 300mA (at 48V input) Recommended Input Fuse 7.5A Recommended Wire Gauge 16 AWG (input and output) OUTPUT SPECIFICATIONS Output Voltage 12V DC (11.65V – 12.35V) Output Current 0 – 10A Output Power 120W maximum Voltage Regulation Accuracy ±2% Load Regulation ±2% Output Ripple & Noise 50mV typical, 200mV max (20MHz bandwidth) Output Voltage Rise Time 8ms – 50ms Boot Delay Time 30ms – 100ms Output Voltage Overshoot ≤5% External Capacitance (max) 2000μF EFFICIENCY Efficiency 92% typical (48V input, 10A output, 25°C) PROTECTION FEATURES Overvoltage Protection (OVP) 13.8V – 15V (hiccup mode, auto-recovery) Overcurrent Protection (OCP) 10.5A – 14A (hiccup mode, auto-recovery) Short Circuit Protection (SCP) Continuous (hiccup mode, survives 4-hour short) Over-Temperature Protection (OTP) 85°C shell temp (restores at 80°C) Undervoltage Lockout (UVLO) 30V – 36V shutdown, auto-recovery Reverse Polarity Protection Yes — prevents damage from reversed input connections ISOLATION & SAFETY Input-to-Output Isolation ≥1500V DC Input-to-Shell Isolation ≥1500V DC Output-to-Shell Isolation ≥500V DC Insulation Resistance ≥50MΩ (at 500V test voltage) ENVIRONMENTAL Operating Temperature -40°C to +50°C Storage Temperature -55°C to +100°C Operating Humidity 5% – 95% (non-condensing) Waterproof Rating IP65 Cooling Method Natural convection (no fan required) Maximum Altitude 4000m GENERAL Switching Frequency 250 ±30 KHz MTBF ≥200,000 hours Dimensions (L × W × H) 110 × 70 × 23mm (4.33 × 2.76 × 0.91 in) Weight ≤250g (8.8 oz) Certifications RoHS, CE Warranty 2 Years Why Choose an Isolated DC-DC Converter? Unlike standard (non-isolated) buck converters, the WGI10-48S12L provides galvanic isolation between the input and output circuits. This is critical in applications where: Safety is paramount: The 1500V isolation barrier protects users and sensitive equipment from dangerous high-voltage faults Ground loops must be eliminated: Isolation breaks ground loop paths that cause noise, hum, and measurement errors in sensitive instrumentation Multiple voltage domains coexist: Safely interface between 48V battery systems and 12V electronics without shared ground concerns Regulatory compliance is required: Many industrial, telecom, and medical standards mandate galvanic isolation between power domains Ideal Applications 🔋 48V Battery Systems: Golf carts, forklifts, e-bikes, and electric vehicles requiring 12V accessory power ☀️ Solar & Alternative Energy: Off-grid and grid-tied solar installations with 48V battery banks 📡 Telecommunications: Powering 12V equipment from standard -48V telecom DC power plants ⚓ Marine & Boating: Waterproof design ideal for boats, yachts, and marine electronics 🏭 Industrial Automation: Factory floor equipment, PLCs, sensors, and control systems 🎖️ Military & Defense: Ruggedized power conversion for field-deployed electronics ⚡ Electric Motors & Drives: Auxiliary 12V power from 48V motor drive bus Protection Features Explained The WGI10-48S12L includes a comprehensive suite of protection features that ensure safe, reliable operation even under fault conditions: Short Circuit Protection: The converter enters hiccup mode during a short circuit and can withstand a continuous short for up to 4 hours without damage. It automatically restarts when the fault is cleared. Overcurrent Protection (OCP): If output current exceeds 10.5A–14A, the converter enters hiccup mode and automatically recovers when the overload is removed. Overvoltage Protection (OVP): Triggers at 13.8V–15V output to protect connected equipment from voltage spikes. Over-Temperature Protection (OTP): Shuts down at 85°C shell temperature and automatically restarts when temperature drops to 80°C. Input Undervoltage Lockout (UVLO): Prevents operation when input voltage drops below safe operating range (30V–36V), with automatic recovery when voltage returns to normal. Reverse Polarity Protection: Prevents damage if input power leads are accidentally reversed during installation. Installation Notes Use 16 AWG or larger wire for both input and output connections Install a 7.5A fuse on the positive input lead for additional safety Ensure adequate airflow around the converter for optimal thermal performance The converter supports natural convection cooling — no external fan is required under normal operating conditions Maximum external output capacitance: 2000μF Optional Remote On/Off (CNT) pin available for system-level power control Package Contents 1 × WGI10-48S12L Isolated DC-DC Converter Module 📄 Documentation & Resources Manufacturer's Datasheet (PDF)