Hi-Link HLK-URB2403YMD-5WR3 is a compact isolated DC-DC converter that steps down 24V DC (9-36V wide range) to a stable 3.3V / 1200mA single output at 5W rated power. Featuring galvanic isolation, -40°C to +85°C industrial temperature range, and built-in short-circuit protection, this SIP module is designed for industrial control systems, automotive electronics, PLC boards, and embedded 3.3V rail applications powered from 24V bus. Specifications Input Voltage (Nominal): 24V DC Input Voltage (Range): 9-36V DC wide range Output Voltage: 3.3V DC (single output) Output Current (max): 1200mA (1.2A) Rated Power: 5W continuous output Efficiency: ≥80% typical at full load Isolation Voltage: 1500V DC (input-to-output galvanic isolation) Output Voltage Accuracy: ±1% at full load Ripple & Noise: ≤50mVp-p (20MHz bandwidth) Load Regulation: ≤±0.5% Line Regulation: ≤±0.5% Short-Circuit Protection: Built-in continuous protection, auto-recovery Overcurrent Protection: Built-in Operating Temperature: -40°C to +85°C Storage Temperature: -55°C to +125°C Cooling Method: Free air convection (no heatsink required) Package / Dimensions: SIP-7 / 25.4 × 25.4 × 11mm (L × W × H) Weight: Approx. 8g Pinout: Fixed SIP-7 footprint — consistent across URB_YMD family for multi-voltage design-in Certifications: CE / RoHS compliant; UL94-V0 PCB material Key Features Wide 9-36V input range — covers 12V, 24V, and industrial DC bus variations 3.3V / 1.2A regulated output — direct power for MCUs, FPGAs, sensors, and logic ICs 5W continuous rated power — sufficient for processor boards and multi-IC modules 1500V DC galvanic isolation — protects downstream circuits from high-voltage transients High efficiency ≥80% — minimal heat, no heatsink or fan needed Low ripple ≤50mVp-p — clean 3.3V rail for noise-sensitive digital circuits -40°C to +85°C operating range — industrial and automotive grade reliability Built-in short-circuit & overcurrent protection — auto-recovery on fault clearance Compact SIP-7 package 25.4×25.4×11mm — standard footprint shared across URB_YMD series Consistent pinout across input/output voltage variants — easy multi-voltage design-in on one PCB Applications Industrial PLC and control board 3.3V rail — power logic from 24V industrial bus Automotive & EV electronics — 24V vehicle bus to 3.3V MCU/sensor supply Embedded system power supply — STM32, ESP32, FPGA core voltage from 24V rail Motor driver control boards — isolated 3.3V logic supply alongside high-voltage drive stage Industrial sensor & transmitter power — 4-20mA loop-powered device supply Robotics and servo systems — isolated logic-level power from 24V servo bus Energy meters and smart grid equipment — measurement circuitry isolated power Railway and transportation electronics — wide-temp, isolated DC-DC for harsh environments Communication equipment — RS-485 / CAN transceiver isolated power supply Medical equipment auxiliary power — isolated low-voltage supply for sensor readout circuits Package Includes 1 × Hi-Link HLK-URB2403YMD-5WR3 DC-DC Power Module (3.3V / 1200mA / 5W) Pin assignments: +Vin / -Vin / NC / +Vout / -Vout / Ctrl / NC (SIP-7 footprint) Datasheet reference: URB2403YMD-5WR3 — part of the HLK-URB 24V-input series External components: Input/output filter capacitors recommended per datasheet for optimal EMC performance FAQ Q: What is the input voltage range for this module?A: The HLK-URB2403YMD-5WR3 accepts 9-36V DC wide range, with 24V nominal. It works reliably across 12V-24V industrial bus variations. Q: What is the output voltage and current?A: Single output: 3.3V DC at up to 1200mA (1.2A), rated 5W continuous. Q: What is the isolation voltage between input and output?A: 1500V DC galvanic isolation — protects the 3.3V output circuit from input-side transients and ground differences. Q: Does this module need a heatsink or external cooling?A: No. At ≥80% efficiency, heat dissipation is minimal and free-air convection is sufficient for normal operating conditions. Q: What is the operating temperature range?A: -40°C to +85°C — industrial and automotive grade, suitable for outdoor enclosures and vehicle electronics. Q: How does the URB (single output) differ from the URA (dual output) variant?A: URB series provides a single regulated output (e.g. 3.3V). URA series provides dual symmetric outputs (e.g. ±12V or ±5V) for analog circuits requiring bipolar supply. Choose URB for digital logic, URA for op-amp and analog front-end circuits. Q: How does the 5W variant compare to the 6W variant (URB2403YMD-6WR3)?A: The 6W variant (1400mA output) provides 17% more current capacity for higher-load designs. The 5W variant (1200mA) covers most MCU and sensor board requirements at lower cost. Q: Can this module be used in 12V systems?A: Yes — the 9-36V input range covers 12V nominal systems. The same module works in both 12V and 24V DC bus environments. Q: What external components are recommended?A: Input-side bulk capacitor (47-100µF) and output-side filter capacitor (100µF ceramic + 10µF electrolytic) per Hi-Link application note for optimal ripple performance. Q: Is this module compatible with other URB_YMD variants?A: Yes — the entire URB_YMD family shares a consistent SIP-7 footprint. You can swap between 3.3V, 5V, 12V, 15V, 24V output variants on the same PCB without layout changes.
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