PRBX DBC300 Series AC/DC Power Supply
The PRBX DBC300 Series AC/DC Power Supply is a compact and efficient solution for industrial, defense, and railway applications. Delivering up to 300W of power, it ensures reliable and stable performance in challenging environments. Key features include a wide input voltage range (85–264Vac, 120–350Vdc) with Power Factor Correction (PFC) for enh...
Read MoreThe PRBX DBC300 Series AC/DC Power Supply is a compact and efficient solution for industrial, defense, and railway applications. Delivering up to 300W of power, it ensures reliable and stable performance in challenging environments.
Key features include a wide input voltage range (85–264Vac, 120–350Vdc) with Power Factor Correction (PFC) for enhanced energy efficiency, and 1 to 2 configurable isolated outputs (3.3–48V DC) to meet diverse application needs. The DBC300 Series incorporates advanced protection features, such as overvoltage, overcurrent, thermal safeguards, and input over/under voltage lockout, ensuring safe and dependable operation. Fully compliant with MIL-STD-810E for shock and vibration and MIL-STD-461E for EMI, it meets stringent requirements for durability and low electromagnetic interference.
Encased in a low-profile design, the power supply is engineered for extreme conditions, with a conduction-cooled baseplate supporting up to +100°C and an optional extended range of -40°C to +100°C. Rugged construction options, such as conformal coating and IP65-rated enclosures, provide additional protection in harsh environments.
The PRBX DBC300 Series AC/DC Power Supply is the ideal choice for efficient, compact, and reliable power conversion in mission-critical systems.
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Features
- Up to 300W Military power supply
- 85-264 VAC input voltage ranges. PFC
- 1-2 isolated outputs
- 200*80* 40mm very low profile
- Industrial or ruggedised versions
- Active very low inrush current
- Many output configurations available
- Conduction cooled 100°C baseplate
- Safety IEC/EN 60950-1
- RoHS lead-free-solder compliant
Specifications
| INPUT | |
|---|---|
| Input voltage | 85-264VAC. 100-350VDC. |
| Frequency | 47Hz min, 50Hz typ, 440Hz max |
| Power factor | 0.96 typ, 230VAC, 50Hz, Pnom |
| Input current | 4.5A at Vin min. |
| No-load input power | 8W at Vin typ. |
| Peak inrush current | 3A Vin max. |
| Start-up time | 1s typ. |
| Input fuse | A fuse mounted inside the psu protects against damages in case of a failure. |
| Fuse type | Schurter, 5A, 3403.0173L. |
| Transient protection | VDR and common mode input filter |
| OUTPUT | |
|---|---|
| Output Voltage | See Selection Table |
| Redundant operation | Requires external oring diodes. |
| Paralleling operation | Active current share of identical m-boards with PR signal |
| Hold-up time | Yes. |
| Output current prot. | Constant current mode, automatic recovery. |
| Overvoltage protection | Typically >120%Vnom, latching type |
| Remote on/off | An isolated INHIB signal disable corresponding output voltage when connected to RTN. |
| Voltage adjustment | 90-110%Vnom by build in trimmer or external 0.6-1.25V signal referred to RTN. |
| Remote sense | V1, V2, total drop <0.5V, positive line drop <0.25V. |
| Powergood | Common opto-isolated signal referred to RTN. Closed=OK. LED for each output. |
| Auxiliary bias voltage | 5VDC, limited to 200mA. |
| ENVIRONMENTAL | |
|---|---|
| Operating temperature | -20°C to +85°C (T-option -40°C). |
| Heatsink temperature | -20°C to +100°C (T-option -40°C). |
| Storage temperature | -40°C to +125°C. |
| Over temp. protection | 105°C ± 5°C base plate, autorecovery <70°C |
| Damp heat | MIL STD 810 Proc. 507-2. |
| Shock | MIL STD 810 Proc. 516.3 |
| Vibrations | MIL STD 810 Proc. 514-5 |
| MTBF/MIL-HDBK-217F | Heatsink, GB, GF 40°C 285000 hrs 165000 hrs 70°C, 139500 hrs, 82300 hrs 100°C, 86500 hrs, 51000 hrs |
| GENERAL | |
|---|---|
| Electric strength | Input to earth 1500Vrms Input to output 3000Vrms Output to earth 500Vrms. |
| Insulation resistance | >100Mohms. |
| Dimensions | 200 x 80 x 40mm |
| Weight/ | 600g approx |
| Case | Aluminum natural. |
| OPTIONS | |
|---|---|
| MIL-STD ruggedized (-M) | Meet MIL-STD 461E CE102, MIL-STD 1399-300A, MIL-STD810E shock & vibrations. No laboratory certification. |
| -40°C operation (-T) | The thermal grade of the DC/DC converters used and other components are changed to comply with low ambient temperature. |
| Conformal coating (-V) | During manufacturing process , when V option is specified, components and pcb are covered with an acrylic coating to address high level of ambiant humidity application. |
| Heatsink (-H, -H1) | Thermal resistance: 1.8°C/W at natural convection, 0.6°C/W at 2m/s. -H: a 15 mm heatsink is mounted on the baseplate with longitudinal fins. -H1: a 15 mm heatsink is mounted on the baseplate with transversal fins |
| IP option (-IP) | Full IP65 enclosed mechanical available |
| STANDARDS | |
|---|---|
| Safety standards | Built to meet IEC60950-1, EN60950-1. |
| EMC | |
| Surges | Built to meet EN61000-4-5, 1kV, Criteria B. 2kV, Critiera A |
| Electrostatic discharge | Built to meet EN61000-4-2, 8000V, Critiera B. |
| Fast transients/burst | Built to meet EN61000-4-4, 4000V, Critiera B. |
| Harmonics | Built to meet EN61000-3-2. |
| Flickers | Built to meet EN61000-3-3 Built to meet EN61000-4-3, -6, -11 |
Technical Drawings
Warranty & Returns
Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.