B0303S DC-DC Isolated Power Supply Module - 1W, 3.3V to 3.3V

The B0303S Isolated DC-DC Power Supply Module is a compact solution for isolated 3.3V power conversion. It is designed for applications that require electrical isolation between input and output. The module supports PCB mounting and uses a miniature SIP/DIP package. It delivers isolated low-power output with no heat sink or external components required.

This B0303S module offers up to 81% efficiency and 1KVDC isolation. It is suitable for designs that need a small isolated power supply module with stable operation across a wide temperature range. Output behavior varies with input fluctuation, so a regulated input supply may be required for stable output.

Features of B0303S Isolated DC-DC Power Supply Module - 1W, 3.3V to 3.3V

• Isolated 3.3V output
• 1W output power
• Up to 81% efficiency
• 1KVDC isolation
• Miniature SIP/DIP package
• PCB mounting support
• No heat sink required
• No external components required
• Industry standard pinout
• RoHS compliance
• UL94-V0 package

Specifications of B0303S Isolated DC-DC Power Supply Module - 1W, 3.3V to 3.3V

• Input voltage: 2 to 5V DC
• Output voltage: 3.3V DC isolated
• Output current: approx. 0.2 to 0.3A
• Output power: 1 Watt
• Efficiency: up to 81%
• Isolation voltage: 1000V DC
• Dimensions: 11.7 x 6 x 10 mm
• Package: miniature SIP/DIP, industry standard pinout
• Operating temperature: -40°C to +85°C
• Voltage (input): 3V ±10% DC
• Voltage (output): 3V ±10% DC
• Maximum efficiency (%): 70 to 79
• Output current (A): 0.33
• Linear adjustment rate: ±1.2%
• Load regulation rate (10%-100%): 15%
• Short circuit protection: 1S, automatic recovery
• Working temperature: -45~85°C
• Noise/Ripple: ≤75mVp-p (Nom.), ≤100mVp-p (Max.)
• MTBF: ≥ 200 million hours

How to Use B0303S Isolated DC-DC Power Supply Module - 1W, 3.3V to 3.3V

1. Apply the input voltage within the specified range.
2. Mount the module on the PCB using the SIP/DIP package.
3. Connect the isolated output to the target circuit.
4. Check output behavior under your input supply conditions.

More Info

• Output varies with input fluctuation.
• A regulated input supply may help stabilize the output.
• TVS diodes can be used for downstream component protection.