Kunkune

300W 5A Step Down Buck Converter 5-40V To 1.2-35V Power Supply Module

The 300W 9A Step Down Buck Converter Power Supply Module offers a wide input range of 5-40V and adjustable output from 1.2-35V, ideal for varied electronic applications.

300W 5A Step Down Buck Converter 5-40V To 1.2-35V Power Supply Module - Main image
$4.05 $6.75 In stock

Category: DC to DC Converters

300W 5A Step Down Buck Converter Key Features:

  • Brand New and High-Quality Module: Ensures reliable and efficient performance.
  • Stable Constant Current: Utilizes a dedicated benchmark IC and high-precision current sensing resistor.
  • High Output Current: Can reach up to 5A (though not recommended for continuous use without additional cooling).
  • Low Output Ripple: High-frequency capacitor minimizes output ripple, ideal for sensitive applications.
  • LED Driver Compatibility: Well-suited for use as an LED driver.

DC-DC Converter Specifications:

  • Material: Durable PCB board and electronic components.
  • Input Voltage Range: 5-40V, accommodating a wide range of power sources.
  • Adjustable Output Voltage: 1.2-35V, continuously adjustable for versatile applications.
  • Output Current: Up to 7A (add cooling fan if power tube temperature exceeds 65°C).
  • Constant Current Range: Adjustable between 0.2-5A.
  • Maximum Output Power: About 300W (add cooling fan if power tube temperature exceeds 65°C).
  • Module Size: Approximately 6.5 x 4.8 x 2.4 cm, compact for easy integration.

Usage Notes:

  • For high output currents or power, it is recommended to add a cooling fan to manage heat effectively.
  • Ideal for projects requiring precise voltage and current control, such as powering LEDs or other sensitive electronic devices.
A final check before payment

Review your options, quantities and the final total before confirming.

Ordering for an occasion

Delivery times are estimates, so leave time before your occasion.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If plans change

Ask the store about your order before making return or refund arrangements.

Please contact us for the refund processing timeframe before returning an item.

View policy
Planning delivery

Review the available services for your destination.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Return arrangements

Contact the store first to check the conditions for your item.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.6 / 5 · 5 reviews)

Ruby U. ★★★★★

Was able to dial in exactly 5V at 3A for my LED strip project and the constant current held rock steady even when I pushed the load. The adjustable output range covers everything I need without any fuss.

Claire ★★★★★

The constant current feature from the dedicated benchmark IC makes this a solid choice for driving LEDs without flickering, and I was surprised how cool it runs even at a steady 4A load.

Ella R. ★★★★★

Finally got this module wired up for a constant current LED project and the dedicated benchmark IC keeps the output rock solid even under load. The wide input range saved me from having to buy a separate supply for my 36V setup.