MEAN WELL DDR-480 Series 480W DIN Rail DC-DC Converter
Brand: MEAN WELL
Series: DDR-480
Product Overview
The MEAN WELL DDR-480 series is a 480W DC-DC converter designed for DIN rail mounting. It features an ultra-slim width of 85.5mm, a 2:1 wide input voltage range, fanless operation, and a wide operating temperature range from -40°C to +80°C. Key functionalities include 4KVdc I/O isolation, 150% peak load capability, current sharing, DC OK relay contact, adjustable output voltage, and comprehensive protective functions. This series is suitable for industrial and railway control systems, security, and communication applications.
Key Features
- Compliance to EN50155 and EN45545-2 railway standards
- Ultra-slim width: 85.5mm
- 2:1 wide input range
- Wide operating temperature: -40°C to +80°C
- 150% peak load capability
- Current sharing up to 1920W (3+1 units)
- DC output adjustable
- Cooling by free air convection (fanless design)
- Suitable for DIN rail TS-35/7.5 or TS35/15 installation
- Protections: Short circuit, Overload, Over voltage, Over temperature, Input reverse polarity, Input under voltage
- 4KVdc I/O isolation (Reinforced isolation)
- DC OK relay contact
- Remote ON-OFF control
- Operating altitude up to 5000 meters
- 3 years warranty
Applications
- Bus, tram, metro, or railway systems
- Industrial control systems
- Semi-conductor fabrication equipment
- Factory automation
- Electro-mechanical systems
- Wireless networks
- Telecom or datacom systems
Model Encoding
The model number structure is DDR-480 [Input Voltage Range Code]-[Output Voltage].
Example: DDR-480 B-24
- DDR-480: Series name and rated wattage (480W)
- B: Input voltage range (B: 16.8~33.6Vdc, C: 33.6~67.2Vdc, D: 67.2~154Vdc)
- 24: Output voltage (12V, 24V, or 48Vdc)
Specifications
Output Specifications
| Model | DDR-480B-12 | DDR-480B-24 | DDR-480B-48 | DDR-480C-12 | DDR-480C-24 | DDR-480C-48 | DDR-480D-12 | DDR-480D-24 | DDR-480D-48 |
|---|---|---|---|---|---|---|---|---|---|
| DC VOLTAGE | 12V | 24V | 48V | 12V | 24V | 48V | 12V | 24V | 48V |
| RATED CURRENT | 33.4A | 20A | 10A | 33.4A | 20A | 10A | 33.4A | 20A | 10A |
| CURRENT RANGE | 0~33.4A | 0~20A | 0~10A | 0~33.4A | 0~20A | 0~10A | 0~33.4A | 0~20A | 0~10A |
| RATED POWER | 400.8W | 480W | 480W | 400.8W | 480W | 480W | 400.8W | 480W | 480W |
| PEAK CURRENT (5sec.) | 50.1A | 30A | 15A | 50.1A | 30A | 15A | 50.1A | 30A | 15A |
| PEAK POWER (5sec.) | 12Vo: 601.2W, 24Vo/48Vo: 720W | 12Vo: 601.2W, 24Vo/48Vo: 720W | 12Vo: 601.2W, 24Vo/48Vo: 720W | ||||||
| RIPPLE & NOISE (max.) | 100mVp-p | 120mVp-p | 150mVp-p | 100mVp-p | 120mVp-p | 150mVp-p | 100mVp-p | 120mVp-p | 150mVp-p |
| VOLTAGE ADJ. RANGE | 12~14V | 24~28V | 48~56V | 12~14V | 24~28V | 48~56V | 12~14V | 24~28V | 48~56V |
| VOLTAGE TOLERANCE | ±1.0% | ±1.0% | ±1.0% | ±1.0% | ±1.0% | ±1.0% | ±1.0% | ±1.0% | ±1.0% |
| LINE REGULATION | ±0.5% | ±0.5% | ±0.5% | ±0.5% | ±0.5% | ±0.5% | ±0.5% | ±0.5% | ±0.5% |
| LOAD REGULATION | ±1.0% | ±1.0% | ±1.0% | ±1.0% | ±1.0% | ±1.0% | ±1.0% | ±1.0% | ±1.0% |
| SETUP, RISE TIME | 500ms, 60ms | ||||||||
| HOLD UP TIME (Typ.) | Please refer to page 6 (Load de-rating curve ) | ||||||||
Input Specifications
| Parameter | B Type (16.8~33.6Vdc) | C Type (33.6~67.2Vdc) | D Type (67.2~154Vdc) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| CONTINUOUS VOLTAGE RANGE | 14.4~16.8Vdc | 28.8~33.6Vdc | 66~67.2Vdc | ||||||
| EFFICIENCY (Typ.) | 90% | 91% | 90.5% | 91% | 92% | 92% | 91% | 92% | 93% |
| DC CURRENT (Typ.) | 23A @24Vdc | 11.2A @48Vdc | 5A @110Vdc | ||||||
| INRUSH CURRENT (Typ.) | 30A | ||||||||
| INTERRUPTION OF VOLTAGE SUPPLY | EN50155: 2017-B/C/D type comply with S2 level (10ms) @ full load | ||||||||
Function Specifications
| Parameter | Details |
|---|---|
| OVERLOAD PROTECTION | Normally works within 150% rated output power for more than 5 seconds, then constant current protection (105~135% rated output power) with auto-recovery. |
| OVER VOLTAGE PROTECTION | Shut down o/p voltage, re-power on to recover. |
| OVER TEMPERATURE PROTECTION | Shut down o/p voltage, re-power on to recover. |
| REVERSE POLARITY PROTECTION | Internal MOSFET protection; recovers automatically after fault condition is removed. |
| UNDER VOLTAGE LOCKOUT | B-type (24Vin): ON ≥16.8V, OFF ≤16.5V C-type (48Vin): ON ≥33.6V, OFF ≤33V D-type (110Vin): ON ≥67.2V, OFF ≤65V |
| DC OK RELAY CONTACT RATINGS (max.) | 30Vdc/1A resistive load |
| CURRENT SHARING | Up to 1920W (3+1 units). Refer to Function Manual. |
| REMOTE ON-OFF CONTROL | Refer to Function Manual. |
Environment Specifications
| Parameter | Details |
|---|---|
| WORKING TEMP. | -40°C to +80°C (Refer to "Derating Curve") |
| WORKING HUMIDITY | 5~95% RH non-condensing |
| STORAGE TEMP., HUMIDITY | -40°C to +85°C, 5~95% RH non-condensing |
| TEMP. COEFFICIENT | ±0.03%/°C (0~55°C) |
| VIBRATION | Component: 10~500Hz, 5G 10min./cycle, 60min. each along X, Y, Z axes; Mounting: Compliance to IEC61373 |
| OPERATING ALTITUDE | Up to 5000 meters / OVCII |
Safety & EMC Specifications
| Parameter | Standard | Test Level / Note | |
|---|---|---|---|
| SAFETY STANDARDS | UL 62368-1, IEC 62368-1, AS/NZS 62368-1, EAC TP TC 004 approved | ||
| WITHSTAND VOLTAGE | I/P-O/P: 4KVdc, I/P-FG: 2.5KVdc, O/P-FG: 0.71KVdc | ||
| ISOLATION RESISTANCE | I/P-O/P, I/P-FG, O/P-FG: >100M Ohms / 500Vdc / 25°C / 70% RH | ||
| EMC EMISSION | Conducted | EN55032 (CISPR32) - Class A | |
| Radiated | EN55032 (CISPR32) - Class B | ||
| Voltage Flicker | EN61000-3-3 | - | |
| EMC IMMUNITY | ESD | EN61000-4-2 | Level 3, 8KV air; Level 3, 6KV contact; criteria A |
| Radiated | EN61000-4-3 | Level 3, 10V/m; criteria A | |
| EFT/Burst | EN61000-4-4 | Level 3, 2KV; criteria A | |
| Surge | EN61000-4-5 | Level 3, 1KV/Line-Line; Level 3, 2KV/Line-Line-FG; criteria A | |
| Conducted | EN61000-4-6 | Level 3, 10V; criteria A | |
| Magnetic Field | EN61000-4-8 | Level 4, 30A/m; criteria A | |
| RAILWAY STANDARD | Compliance to EN45545-2 for fire protection; Meet EN50155 / IEC60571 including IEC61373 for shock & vibration, EN50121-3-2 for EMC. | ||
Other Specifications
| Parameter | Details |
|---|---|
| MTBF | 280.0K hrs min. (Telcordia SR-332); 101.7K hrs min. (MIL-HDBK-217F @ 25°C) |
| DIMENSION (W*H*D) | 85.5 * 125.2 * 128.5 mm |
| PACKING | 1.375Kg; 8pcs/12Kg/0.98CUFT |
Note: All parameters measured at normal input (B:24Vdc, C:48Vdc, D:110Vdc), rated load, and 25°C ambient temperature, unless otherwise specified. Refer to the full datasheet for detailed notes.
Diagrams and Curves
Block Diagram
The block diagram illustrates the internal architecture of the DDR-480 series converter. It shows the signal flow from the DC input (DC I/P) through an EMI filter, followed by a power switching stage controlled by PWM control and OLP (Overload Protection). The output is processed by rectifiers and a filter, with OVP (Over Voltage Protection) and a detection circuit. A current share function is included for parallel operation. The output includes DC OK status, +Vo, -Vo, and P+/P- terminals for current sharing.
Derating Curve (Ambient Temperature)
This curve shows the load percentage versus ambient temperature. The converter can operate at 100% load continuously up to 60°C. For temperatures between 60°C and 80°C, derating is required. A peak load of 150% is supported for 5 seconds.
Output Derating VS Input Voltage
This graph illustrates how output load capacity is affected by input voltage for different model types (B, C, D). It shows the typical input voltage ranges for each type and how the maximum load percentage changes with input voltage, indicating that derating may be necessary at lower input voltages within a type's range.
Hold-up Time
The hold-up time is the duration the output voltage remains within specification after the input power is removed. The table and graphs show minimum hold-up times for various load conditions (100%, 70%, other) and models (B, C, D types). For example, B type at 100% load has a minimum hold-up time of 10ms.
Efficiency vs Load & Vin Curve
These graphs display the efficiency of the DDR-480 series converters across different load percentages (10% to 100%) and input voltage variations for each specific model. Generally, efficiency is high, often exceeding 90%, and is relatively stable across the load range, with slight variations depending on the input voltage.
Input Under-Voltage Protection
Graphs illustrate the input voltage thresholds for turning the output ON and OFF. For example, the DDR-480B-24 turns ON at approximately 16.8Vdc and OFF at approximately 16.5Vdc. Similar thresholds are shown for C and D types.
Inrush Current
The inrush current is suppressed by a resistor during initial start-up, followed by a bypass via MOSFETs to reduce power consumption. The graph shows a characteristic inrush current waveform with an initial peak followed by a rapid decrease to the normal operating current.
Mechanical Specifications
Dimensions
Width: 85.5 mm
Height: 125.2 mm
Depth: 128.5 mm
Case No.: 984F
Terminal Pin Assignments
TB1 (Front View)
| Pin No. | Assignment |
|---|---|
| 1 | FG (Frame Ground) |
| 2 | DC input -Vin |
| 3 | DC input +Vin |
| 4 | Remote ON/OFF |
TB2 (Front View)
| Pin No. | Assignment |
|---|---|
| 1, 2 | DC output +Vo |
| 3, 4 | DC output -Vo |
| 5, 6 | DC OK Relay Contact |
| 7, 8 | P+, P- (Current sharing) |
Installation: Fits DIN rail TS35/7.5 or TS35/15.
Installation and Manual
For detailed installation instructions, please refer to the product's Instruction Manual.
Installation Manual Link: http://www.meanwell.com/manual.html
