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Mean Well DDR-15L-3.3 DC-DC Converter - 11.6W - 18~75V in 3.3V out

2:1 or 4:1 wide input range, fanless design, 4KVdc I/O isolation, ultra slim dimensions

SKU:

DDR-15L-3.3

Model

11.6W - 3.3V out - 9~36V in

SKU: DDR-15G-3.3

11.6W - 3.3V out - 18~75V in

SKU: DDR-15L-3.3

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Description

The DDR-15L is a compact 15W DIN Rail type DC-DC converter designed for installations powered from 24V or 48V battery and DC bus systems. Its ultra slim 17.5mm (1SU) profile fits standard TS-35 DIN rails, and a 4:1 wide input voltage range of 18~75Vdc covers nominal 24V and 48V DC supplies. With no minimum load requirement, free air convection cooling, and reinforced 4KVdc I/O isolation, the DDR-15L provides reliable isolated power across a -40~+85°C operating range.

Key Features

✓ Ultra slim 17.5mm (1SU) width — DIN rail TS-35/7.5 or 15 compatible
✓ 4:1 wide input voltage range: 18~75Vdc
✓ DC output voltage adjustable ±10%
✓ 4KVdc reinforced I/O isolation
✓ Cooling by free air convection — no minimum load required
✓ Wide operating temperature: -40°C ~ +85°C
✓ Protections: Short circuit / Overload / Over voltage / Reverse polarity / Under voltage lockout
✓ Safety approvals: IEC 62368-1, AS/NZS 62368.1
✓ 3 years warranty

Specifications

Brand

Mean Well
Series

DDR Series
Power Rating

15 Watt
Output Voltage

3.3 Volt
Rated Current

4.5 Ampere
Input Voltage

18V~75V
Standards Met

CE,EAC,EMC
Operation Mode

Constant Voltage
Operating Temperature

-40°C~85°C
Warranty

2 Year
Length

9 cm
Width

5.45 cm
Height

1.75 cm
Weight

0.07 kg

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Frequently Asked Questions

Can I use the DDR-15L-3.3 to power 3.3V microcontrollers or FPGAs from a 48V DC bus?

Yes. The DDR-15L-3.3 accepts 18-75V DC input and outputs 3.3V at up to 4.5A. This makes it suitable for powering 3.3V microcontrollers, FPGAs, or other digital logic boards directly from a 48V telecom or industrial DC bus through DIN rail mounting.

Is the DDR-15L-3.3 a good fit for powering IoT gateway boards in a 48V solar-powered installation?

Yes. The 18-75V input range accommodates 48V battery systems, and the 3.3V/4.5A output can power IoT gateways, Raspberry Pi-class boards (with appropriate regulation), or LoRa/Zigbee communication modules. The 4KVdc I/O isolation protects sensitive IoT electronics from the solar battery bus.

Can the DDR-15L-3.3 power 3.3V RS-485 transceivers or serial communication modules on DIN rail?

Yes. The DDR-15L-3.3 provides 3.3V at up to 4.5A, which is more than sufficient for RS-485 transceivers, serial-to-Ethernet converters, or communication interface boards. Its ultra-slim 17.5 mm width conserves valuable DIN rail space in crowded communication panels.

Does the DDR-15L-3.3 need derating at elevated ambient temperatures?

The DDR-15L-3.3 is rated for -40°C to +85°C operation. Like most power converters, some derating may apply at the upper end of this range. Consult the Mean Well datasheet for the specific derating curve to ensure full 4.5A output is available at your expected ambient temperature.

How does the DDR-15L-3.3 compare to the DDR-15G-3.3 for 3.3V applications?

The DDR-15G-3.3 accepts 9-36V DC input at 3.5A output, while the DDR-15L-3.3 accepts 18-75V DC input at 4.5A output. Choose the G variant for 12V or 24V source buses, and the L variant for 48V or higher-voltage DC systems. Both share the same ultra-slim DIN rail form factor.

Can this converter supply 3.3V logic power for embedded data acquisition systems in remote utility substations?

Yes. The DDR-15L-3.3 is well suited for remote substations where a 48V DC bus is common. It can power 3.3V data acquisition boards, RTUs, or protocol converters. The -40°C to +85°C operating range and fanless design make it reliable in unattended outdoor enclosures.

Model	Power	Voltage	Current	IP Rating
Mean Well DDR-15L-12 DC-DC Converter - 15W - 18~75V in 12V out	15W	12V	1.25A	Indoor	View
Mean Well DDR-15L-5 DC-DC Converter - 15W - 18~75V in 5V out	15W	5V	3A	Indoor	View
Mean Well DDR-15L-24 DC-DC Converter - 15W - 18~75V in 24V out	15W	24V	0.63A	Indoor	View
Mean Well DDR-15L-15 DC-DC Converter - 15W - 18~75V in 15V out	15W	15V	1A	Indoor	View

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Mean Well DDR-15L-3.3 DC-DC Converter - 11.6W - 18~75V in 3.3V out

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Mean Well DDR-15L-3.3 DC-DC Converter - 11.6W - 18~75V in 3.3V out

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