TDK-Lambda RM15-4R0GB

Core Technical Performance Parameters

Input Specifications

• Input Voltage Range: 85–132 V AC single phase
• Input Frequency: 47–440 Hz wide industrial frequency range
• Max Input Apparent Power: 110 VA at full 4 A output load
• Internal Input Fuse: 3.15 A slow blow safety fuse
• Cold Start Inrush Current: Max 17 A peak at 25 °C ambient
• Max Leakage Current: 0.5 mA maximum

Output Specifications

• Nominal Output Voltage: 15 V DC
• Rated Continuous Output Current: 4.0 A
• Full Rated Output Power: 60 W
• Output Voltage Adjustment Range: ±10% via front panel trim potentiometer
• Output Ripple Noise: ≤50 mV peak-to-peak 20 MHz bandwidth measurement
• Line Regulation: ≤0.5% full input voltage swing
• Load Regulation: ≤0.5% 0–100% load variation
• No-load Operation Support: Stable output under zero output current condition

Protection & Environmental

• Integrated Protection Circuits: Overvoltage protection (120–150% Vout threshold), constant current overload limiting, auto-recovery short-circuit shutdown, input reverse polarity protection
• Typical Full Load Efficiency: 76% at 110 V AC input
• Continuous Operating Temperature: 0 °C to +50 °C full rated power; linear power derating above 50 °C
• Storage Temperature Range: -20 °C to +85 °C
• Input-Output Isolation: 4300 V DC reinforced safety isolation
• Safety Certifications: UL, CSA, CE, IEC 60950-1 industrial control equipment standard
• Net Weight: 0.38 kg

Function & Feature Highlights

1. High 4 A continuous output current capacity to power multiple parallel low-power control modules simultaneously
2. Wide 47–440 Hz input frequency compatibility for marine, generator-powered off-grid industrial power grid
3. Automatic recovery short-circuit protection, no manual power cycle required after fault removal
4. Reinforced 4.3 kV isolation meets IEC safety separation standard for cabinet control and power circuit isolation
5. Low leakage current design, suitable for marine automation and medical low-interference equipment power supply
6. Multi-stage EMI input filter suppresses industrial grid voltage spikes and high-frequency harmonic noise
7. High-temperature rated long-life electrolytic capacitors extend service life under continuous full-load operation
8. Front panel adjustable output voltage potentiometer for precise matching of sensitive sensor and amplifier load equipment

Working Principle

1. Single-phase AC mains input flows through multi-stage EMI filter to eliminate grid high-frequency interference, then rectified into high voltage DC bus voltage.
2. PWM high-frequency switching circuit and isolation ferrite transformer execute voltage step-down conversion to secondary low voltage high-current pulse signal.
3. Secondary synchronous rectifier and LC low-pass filter convert high-frequency pulse waveform into stable low-ripple 15 V DC high-current output.
4. Output voltage sampling feedback loop dynamically adjusts PWM switching duty cycle to maintain constant output voltage during input voltage fluctuation and load current variation.
5. Independent hardware protection circuit monitors output voltage, output current and input polarity; immediately cuts PWM switching drive signal to protect internal power components once fault condition detected.

Material & Structural Composition

• Outer Enclosure: Galvanized cold rolled steel sheet with anti-rust black coating, ventilation slot design for passive cooling
• Main Circuit PCB: High TG FR4 fiberglass substrate, lead-free solder plating
• Power Core Components: Low Rds(on) high-efficiency MOSFET switching tubes, large capacity high-frequency ferrite transformer
• Energy Storage Capacitors: 105 °C rated long-life aluminum electrolytic capacitors
• EMI Filter Assembly: Common mode and differential mode dual-stage filter inductors
• Adjustment Component: Precision carbon film trimming potentiometer for output voltage fine tuning
• Terminal Connectors: Large capacity tin-plated copper screw terminals for high-current output wiring

Installation Requirements

1. Vertical cabinet mounting orientation mandatory, minimum 25 mm vertical clearance above and below unit for natural convection heat dissipation
2. Avoid installation adjacent to high heat generating equipment (servo drives, brake resistors, power transformers)
3. Input AC wiring minimum cross-section 1.25 mm² copper wire; output high-current wiring use minimum 1.5 mm² copper cable to reduce voltage drop
4. Protective earth ground terminal must be reliably connected to cabinet metal ground rail for safety isolation
5. Separate input AC wiring and output DC wiring routing to avoid electromagnetic cross interference

Application Scenarios

• Multi-module PLC/DCS control cabinet centralized auxiliary power supply
• Marine vessel distributed I/O module high-current power source
• Hydraulic proportional valve amplifier bank centralized power supply
• Automated production line sensor array and signal converter power supply
• Industrial robot peripheral auxiliary control circuit power supply

Operation & Maintenance Precautions

1. Ambient temperature above 50 °C requires linear output current derating, continuous full load operation at high temperature will shorten capacitor service life
2. Avoid continuous short-circuit operation over 10 seconds; repeated long short-circuit cycles degrade internal switching tube performance
3. Input AC voltage must not exceed maximum 132 V AC rating, overvoltage will blow internal input safety fuse
4. Do not cover housing ventilation slots with cables, cable ties or cabinet accessories; blocked airflow causes overheating thermal shutdown
5. Conduct semi-annual ventilation slot dust cleaning to maintain optimal heat dissipation efficiency