Mean Well DDR-120A-24 DC-DC Converter - 100.8W - 9~18V in 24V out

Description

Features

Width only 32mm

Compliance to EN50155 and EN45545-2 railway standard

DC output adjustable ( 10%)

2:1 wide input range

150% peak load capability

Protections: Short circuit / Overload / Over voltage /Input reverse polarity / Input under voltage protection

4KVdc I/O isolation(Reinforced isolation)

Can be installed on DIN rail TS-35/7.5 or 15

-40~+70°C wide working temperature

Cooling by free air convection

3 years warranty

General Specification

Over current protection	Normally works within 150% rated output power for more than 3 seconds and then constant current protection 105~135% rated output power with auto-recovery
Over voltage protection	12V:13.8~16.2V ; 15V:17.25~20.25V ; 24V:28.8~32.4V; Protection mode: Shut down o/p voltage, re-power on to recover
REVERSE POLARITY	By internal MOSFET, no damage, recovers automatically after fault condition removed
Withstand voltage	I/P-O/P:4KVDC I/P-FG:2.5KVDC O/P-FG:2.5KVDC
Working temperature	-40~+70°C (Refer to ""Derating Curve"")
Safety standards	IEC 62368-1 (LVD),EAC TP TC 004 approved, Design refer to UL508
EMC standards	With external components Compliance to EN55032 Class B;EN61000-3-,3，EN61000-4-2,3,4,5,6,8
Dimension (LxWxH)(mm)	32 x 125.2 x 102 mm

Specifications

Brand

Mean Well
Series

DDR Series
Power Rating

100.8 Watt
Output Voltage

24 Volt
Rated Current

4.2 Ampere
Input Voltage

9V~18V
Standards Met

CE,EMC
Operation Mode

Constant Voltage
Operating Temperature

-40°C~85°C
Warranty

2 Year
Length

12.52 cm
Width

10.2 cm
Height

3.2 cm
Weight

0.51 kg

File Downloads

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Frequently Asked Questions

Can I use the DDR-120A-24 to power 24V PLC modules from a low-voltage DC bus?

Yes. The DDR-120A-24 converts a 9–18V DC input to a regulated 24V output at up to 4.2A (100.8W), which is sufficient for many compact PLC systems and their associated I/O modules. The 4KVdc isolation protects the control system from noise on the input bus.

Is this converter appropriate for powering 24V solenoid valves in a mobile hydraulic system?

The DDR-120A-24 can supply 24V at 4.2A from a 9–18V DC source such as a vehicle battery system. Its DIN rail mounting, wide operating temperature range of -40°C to +85°C, and fanless design make it practical for mobile machinery cabinets where vibration and temperature swings are common.

Can I use the DDR-120A-24 to generate 24V for instrumentation from a 12V solar battery bank?

Yes, as long as the battery voltage stays within the 9–18V input range. The DDR-120A-24 provides an isolated 24V output at up to 4.2A, making it suitable for stepping up a 12V nominal battery bus to power 24V field instruments or data acquisition equipment in remote solar-powered installations.

Does the DDR-120A-24 need forced airflow in a sealed DIN rail enclosure?

No. The DDR-120A-24 uses a fanless convection-cooled design, so it does not require forced airflow. It operates from -40°C to +85°C, but in a sealed enclosure you should verify that internal ambient temperature stays within that range under full 100.8W load to avoid thermal derating.

Is the DDR-120A-24 suitable for powering 24V HMI touchscreens in a process control panel?

The DDR-120A-24 outputs 24V at up to 4.2A, which is enough for most industrial HMI panels. Its ultra-slim 32 mm width conserves DIN rail space, and the 4KVdc isolation helps prevent ground loops between the low-voltage DC input bus and sensitive display electronics.

Model	Power	Voltage	Current	IP Rating
Mean Well DDR-120A-48 DC-DC Converter - 100.8W - 9~18V in 48V out	100.8W	48V	2.1A	Indoor	View
Mean Well DDR-120A-12 DC-DC Converter - 99.6W - 9~18V in 12V out	99.6W	12V	8.3A	Indoor	View

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