# Step-down module, 4 outputs, 4.5-30V to 3.3V-5V-12V-ADJ

> DC-DC step-down module, model DD31AJQA, with 4 outputs: 3 fixed (3.3V, 5V, 12V) and one adjustable channel (2-28V). Input voltage 4.5-30VDC, maximum current 3A per channel, total power 50W, operating frequency 150KHz. Includes reverse polarity protection, current limiting and thermal shutdown. Operating temperature -40°C to +85°C. Dimensions 88x55x15mm.

- Page: https://sigmanortec.ro/en/step-down-module-4-outputs-45-30v-to-33v-5v-12v-adj
- Price: 79.34 RON
- Availability: In stock; 1-2 zile
- Reference: 9738 · EAN: 5948631979416
- Category: Electronic components > Step Down Modules
- Specifications: tension: AD; Supply Voltage: 4; Maximum Input Voltage: 30; Minimum Output Voltage: 2; Maximum Output Voltage: 28; Source Type: descend; Current Adjustment: Not; Voltage Adjustment: Yes; Adjustment Type: Variable or Fixed; Maximum Output Current: 3; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Output Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.
- Package (shipping data): 0.059 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-21 22:20 (Europe/Bucharest)

## Description

DC-DC step-down converter with 4 outputs for simultaneous power supply of multiple circuits, 3 fixed channels 3.3V, 5V and 12V plus an adjustable channel 2-28V. It operates at 4.5-30V input, offers up to 3A per channel and 50W total, with reverse polarity protection, current limiting and thermal shutdown, ideal for electronic projects and industrial applications.
Step-down module with 4 channels, one of which is adjustable, the remaining 3 fixed. It is a DC-DC voltage converter that integrates the four channels in the same way, each of which can offer a different output. This module is capable of handling a variety of input and output voltages, and includes protections against reverse connections, current limiting and thermal shutdown.
Specifications:
Supply voltage: 4.5 - 30VDC
Output voltages: 3.3V, 5V, 12V and one adjustable channel (2-28V)
Model: DD31AJQA
Number of channels: 4
Maximum Current per Channel: 3A
Maximum total output power: 50W
Working frequency: 150KHz
Operating Temperature: -40°C to +85°C
Protections: Reverse connection, current limitation, temperature
Dimensions: 88x55x15mm
Use:
Make sure that the input voltage does not exceed 30VDC.
Do not exceed the maximum long-term load for each channel. We recommend using half of the maximum specifications given.
The input voltage must be higher than the desired output voltage to compensate the consumption of the module.
Connect the power supply respecting the specified polarity and limits.