Power adapter MEAN WELL MDS01L-03 1W 0.303A 4.5-5.5V

The MEAN WELL MDS01L-03 is a compact DC‑DC medical converter designed for PCB mounting. It accepts a 4.5–5.5 V DC input and provides a single regulated 3.3 V DC output capable of supplying up to 0.303 A (1 W). The module is supplied in a SIP through‑hole package and offers reinforced isolation with two MOPP, making it suitable for low‑power medical and sensitive electronic applications requiring isolation and a small footprint.

Advantages

The converter delivers a stable 3.3 V output with up to 0.303 A current in a minimal 1 W power envelope, reducing board space compared with larger power supplies. Its SIP through‑hole format simplifies PCB assembly and mechanical retention. Reinforced isolation (2×MOPP) supports safety requirements in medical equipment. RoHS compliance ensures it meets environmental material restrictions.

Suitable for

• Low‑power medical electronics and patient‑connected devices requiring 2×MOPP isolation
• Embedded systems and microcontroller power rails at 3.3 V
• PCB‑mounted designs where space is limited and through‑hole mounting is preferred

When it may not be suitable

This converter is rated for only 1 W and a maximum output current of 0.303 A; it is not appropriate for applications requiring higher power or greater load current. Systems that need multiple output voltages or higher isolation voltages may require a different power module.

Key specifications

• Input voltage range: 4.5–5.5 V DC
• Output voltage: 3.3 V DC (regulated)
• Maximum output current: 0.303 A
• Output power: 1 W
• Package type: SIP through‑hole
• Isolation: reinforced isolation, 2×MOPP
• Compliance: RoHS

How to use

Mount the SIP through‑hole converter on the PCB following the manufacturer’s recommended footprint and soldering guidelines. Apply an input voltage within the 4.5–5.5 V DC range and verify output is 3.3 V under expected load conditions. Ensure isolation creepage and clearance distances on the board meet medical safety standards when integrating the module into patient‑connected equipment.

What to consider before purchase

• Required output current does not exceed 0.303 A
• System power budget limited to approximately 1 W
• Need for reinforced isolation (2×MOPP) for medical compliance
• Through‑hole SIP package fits your PCB layout and assembly process

Usage recommendations

Use this converter for single 3.3 V rails in compact medical or industrial boards where 2×MOPP isolation and through‑hole mounting are required; verify thermal conditions and maintain appropriate clearance for safety.