MEAN WELL DDR-15G-12 is an isolated DIN rail DC/DC converter with a 12 V output, 1.25 A rated current and 15 W rated power. This G-input version accepts 9–36 VDC. Its 17.5 mm (1 SU) plastic housing, adjustable output and fanless convection cooling suit industrial control, automation and telecom equipment within the specified input and thermal limits.
Product Datasheet
Download MEAN WELL DDR-15 Datasheet (PDF)
The DDR-15 section is on PDF pages 1, 2, 3, 4, 5. Refer to the complete mechanical drawings and notes when planning installation.
Model and DC Output
| Full model |
DDR-15G-12 |
| Series |
DDR-15 |
| Input-version code |
G |
| DC output voltage |
12 V |
| Rated output current |
1.25 A |
| Rated output power |
15 W |
| Output current range |
0–1.25 A; no minimum load required |
| Output-voltage adjustment range |
9–13.2 V |
| Maximum ripple and noise |
60 mVp-p |
| Voltage tolerance |
±2.0% |
| Line regulation |
±0.5% |
| Load regulation |
±0.5% |
| Maximum external capacitive load |
1200 µF |
| Set-up / rise time at full load |
120 ms / 85 ms |
| Typical hold-up time |
8 ms at 24 VDC input |
Unless otherwise specified, the electrical measurements use 24 VDC input, rated load and 25°C ambient temperature. Voltage tolerance includes set-up tolerance, line regulation and load regulation.
Ripple and noise are measured with 20 MHz bandwidth using a 12-inch twisted-pair connection terminated with 0.1 µF and 47 µF capacitors in parallel. The external capacitive-load limit above applies to this output voltage.
Use the front Vo Adj. control within the stated adjustment range. Observe the rated current and power limits together with the input-voltage and thermal derating requirements.
DC Input and Efficiency
| Continuous DC input range |
9–36 VDC |
| Input-range ratio |
4:1 |
| Normal input used for measurements |
24 VDC |
| Typical efficiency |
85% |
| Typical DC input current |
0.8 A at 24 VDC |
| Typical input inrush current |
15 A at 24 VDC |
| Nominal switching frequency |
100 kHz |
Protection Functions
| Short-circuit / overload response |
Hiccup mode; automatic recovery after the fault is removed |
| Overload threshold |
110–150% of rated output power |
| Overvoltage threshold |
13.8–16.2 V |
| Overvoltage recovery |
Output shutdown; reapply input power to recover |
| Reverse-input protection |
Internal MOSFET; no damage and automatic recovery after the reversed-input fault is removed |
| Undervoltage lockout thresholds |
Power ON ≥9 VDC; power OFF ≤8.5 VDC |
Protection responses do not increase the continuous output rating. Select the DC input version by its specified operating range and observe the derating limits.
Operating Environment and Load Derating
| Operating ambient range |
−40 to +85°C, subject to the applicable load-derating curves |
| Thermal load limits |
Vertical mounting: 100% load from −40 to +60°C; 50% at 75°C and 40% at 85°C. Follow the curve between these points. |
| Input-voltage load limits |
90% load from 9 VDC to below 12 VDC; 100% from 12 to 36 VDC, subject to thermal derating. |
| Operating humidity |
5–95% RH, non-condensing |
| Storage temperature and humidity |
−40 to +85°C; 5–95% RH, non-condensing |
| Temperature coefficient |
±0.03%/°C over 0–60°C |
| Operating altitude |
5000 m |
| Vibration |
Component: 10–500 Hz, 2 G, 10 minutes per cycle and 60 minutes on each X, Y and Z axis; mounting to IEC 60068-2-6 |
The curves apply to vertical mounting with free-air convection. Use the most restrictive input-voltage and temperature limits together, and maintain airflow around the converter. Percentages refer to the selected model’s rated output.
For fanless operation above 2000 m, reduce the allowable ambient temperature by 3.5°C per additional 1000 m, within the specified 5000 m operating-altitude limit.
Dimensions, Installation and Connections
| Dimensions, W × H × D |
17.5 × 90 × 54.5 mm |
| DIN-module width |
17.5 mm; 1 SU |
| Mechanical drawing tolerance |
±0.5 mm unless marked otherwise |
| Overall depth shown including the rear projection |
58.4 mm |
| Enclosure and cooling |
Plastic housing; fanless free-air convection |
| Compatible DIN rails |
TS35/7.5 or TS35/15 |
| Front controls and indication |
Power LED and Vo Adj. output-voltage adjustment |
| Terminal tightening torque shown |
4.4 lb-in |
| Terminal 1 |
DC output +Vo |
| Terminal 2 |
DC output −Vo |
| Terminal 3 |
DC input −Vin |
| Terminal 4 |
DC input +Vin |
| Unit mass |
68 g; catalogue PACKING reference per unit |
Connect input and output according to the numbered terminal assignments for this model. Mount on an admissible DIN rail and allow adequate space for natural convection and wiring.
DIN rail dimensions identify the mounting interface. The allocated catalogue pages do not specify a separately orderable MEAN WELL rail, cable or mating-connector kit, or state that such accessories are included.
Safety, EMC and Reliability
| Catalogue approved safety standards |
UL 62368-1; IEC 62368-1; AS/NZS 62368.1; EAC TP TC 004 |
| Input-to-output withstand voltage |
4 kVDC; reinforced isolation |
| Input-to-output insulation resistance |
Greater than 100 MΩ at 500 VDC, 25°C and 70% RH |
| Conducted emissions |
BS EN/EN 55032, Class B |
| Radiated emissions |
BS EN/EN 55032, Class B |
| EMC immunity references |
BS EN/EN 55035; BS EN/EN 61000-6-2 (BS EN/EN 50082-2) |
| ESD immunity |
BS EN/EN 61000-4-2: Level 3, 8 kV air and 6 kV contact; criterion A |
| Radiated-field immunity |
BS EN/EN 61000-4-3: Level 3, 10 V/m; criterion A |
| EFT / burst immunity |
BS EN/EN 61000-4-4: Level 3, 2 kV; criterion A |
| Surge immunity |
BS EN/EN 61000-4-5: Level 3, 1 kV line–line; criterion A |
| Conducted immunity |
BS EN/EN 61000-4-6: Level 3, 10 V; criterion A |
| Magnetic-field immunity |
BS EN/EN 61000-4-8: Level 4, 30 A/m; criterion A |
| MTBF, Telcordia SR-332 (Bellcore) |
3446.2 thousand hours minimum |
| MTBF, MIL-HDBK-217F |
907.2 thousand hours minimum at 25°C |
| Catalogue warranty period |
3 years; subject to manufacturer terms |
Catalogue approvals and design references apply to the converter. The completed equipment must be checked again for compliance with the applicable EMC directives and installation requirements.
MTBF figures are calculated reliability references under the stated methods and conditions; they are not guaranteed service-life values.
