Power adapter/inverter mean well SPB09C-03, 9 W, input 36–75 V, output 2 A, depth 24 mm

MEAN WELL SPB09C-03 is a compact 9 W DC-DC regulated converter in a SIP through-hole package. It accepts a wide input voltage range of 36–75 V DC and provides a single 3.3 V DC output capable of delivering up to 2 A. With a depth of 24 mm and a lightweight construction, this module is designed for PCB mounting in embedded systems, LED driver circuits and industrial control equipment where a small, reliable low-power DC converter is required. The unit includes a remote ON/OFF function and is RoHS compliant, supplied in bulk packs.

Advantages

The SPB09C-03 offers regulated output voltage with low-profile SIP mounting suitable for tight spaces on printed circuit boards. Its wide input range supports applications with variable DC supply rails. The 3.3 V 2 A output provides a stable low-voltage source for logic circuits and sensors while the remote ON/OFF feature allows system-level control. The small depth and light weight reduce impact on overall device size and thermal loading.

Suitable for

• Embedded systems and microcontroller power supplies
• LED driver modules and low-power lighting control
• Industrial control circuits and instrumentation
• Telecommunications and distributed power systems with 36–75 V rails

Key specifications

• Power rating: 9 W
• Input voltage range: 36–75 V DC
• Output voltage: 3.3 V DC
• Output current: up to 2 A
• Package: SIP through-hole (PCB mount)
• Depth: 24 mm
• Function: DC-DC regulated converter with remote ON/OFF
• Compliance: RoHS

How to use

Mount the SPB09C-03 on the PCB using the SIP through-hole pins and ensure proper soldering for mechanical and electrical reliability. Connect a DC source within the 36–75 V range to the input pins, observing polarity. Use the output pins to supply the 3.3 V rail, making sure the connected load does not exceed 2 A. Implement decoupling and adequate PCB copper area for heat dissipation. Use the remote ON/OFF pin according to system requirements to enable or disable the output without removing the input power.

Recommendations

For reliable operation, keep input voltage within specified limits and avoid continuous operation at maximum rated output without confirming thermal conditions on the PCB. Place the module to allow airflow around the package, provide adequate solder fillets for heat conduction, and follow PCB layout guidelines for DC-DC converters to minimise noise on the 3.3 V rail.