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POWERBOX Defense Line DBA1200 Series

  • 85-264VAC or 120-350VDC input voltage ranges
  • 1-6 isolated outputs up to 1200W
  • 255 x 127 x 40mm very low profile
  • Power Factor Correction EN61000-3-2
  • Active very low inrush limitation
  • Surge and transient protection
  • Many output configurations available
  • Conduction cooled 100°C baseplate. No derating
  • Safety IEC/EN 60950-1
  • RoHS lead-free-solder compliant

DBA1200 Series

Product Overview

POWERBOX Defense Line 1200 

AC/DC Conduction Cooled 

Description   The DBA series, very compact and low profi le AC/DC power supply up to 1200W in chassis format, incorporates input filtering, input and output protections, very robust mechanical mounting and connection, conformal coating and MIL-STD options required in most of the severe environment for industrial, defense applications. The psu provides high reliability, high efficiency, input-to-output isolation, soft start and active very low inrush circuit, overtemperature protection, input over/undervoltage lockout. The psu is configurable with 1 to 6 outputs in many output voltages from 2V to 54VDC, other outputs are even possible as semi-standard versions. They are continuously short-circuit proof. The 100°C baseplate allows operation in high temperature environment


Operating input voltage 85-264VAC. 120-350VDC.
Frequency 44Hz min, 50Hz typ, 440Hz max.
Power factor 0.96 typ, 230VAC, 50Hz, Pnom
Input current 16A at Vin min.
No-load input power 15W at Vin typ.
Peak inrush current 4A Vin max.
Start-up time 3s typ.
Input fuse A fuse mounted inside the psu protects against damages in case of a failure.
Fuse type Littlefuse, 15A, 0218015.MXP
Transient protection Yes.
Output Voltage See Selection Table
Parallel operation Possible.
Redundant operation Requires external oring diodes.
Hold-up time Yes.
Output current limitation All outputs are protected against short circuit, automatic recovery.
Thermal considerations Baseplate should not exceed 100°C.
Thermal protection OTP protection, automatic restart.
Overvoltage protection Incorporated on each output.
Remote on/off An isolated INHIB signal disable corresponding output voltage when connected to RTN.
Overvoltage adjustment 90-110%Vnom.
Remote sense V1, V2, total drop <0.5V, positive line drop <0.25V.
Auxiliary bias voltage Limited to 200mA.
Paralleling signal Parallel only identical outputs (voltage and power).
Electric strength

Input to earth 1500Vrms.

Input to output 3000Vrms.

Output to earth 500Vrms.

Insulation resistance >100Mohms.
Dimensions 255 x 127 x 40mm
Case Aluminum natural.
Weight 1500g without heatsink.
Options Description
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)

-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.

Operating temperature -20°C to +71°C, see derating (T-option -40°C).
Heatsink temperature -20°C to +71°C, see derating (T-option -40°C).
Storage temperature -40°C to +125°C.
Damp heat MIL STD 810 Proc. 507-2.
Shock MIL STD 810 Proc. 516.3
Vibrations MIL STD 810 Proc. 514-5.
MTBF MTBF calculation for a specific part number has to be ordered
Safety standards Built to meet IEC60950-1, EN60950-1.
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 Meets EN61000-3-3. EN61000-4-3, -6, -11.

Technical Illustration

  • DBA1200 - Selection Table DBA1200 - Selection Table
  • DBA1200 - Block Diagram DBA1200 - Block Diagram
  • DBA1200 - Derating Curve DBA1200 - Derating Curve
  • DBA1200 - Pin Connection DBA1200 - Pin Connection
  • DBA1200 - Mechanical DBA1200 - Mechanical
  • DBA1200 - Mechanical - H Option DBA1200 - Mechanical - H Option
  • DBA1200 - Mechanical - H1 Option DBA1200 - Mechanical - H1 Option
  • DBA1200 - Mechanical - IP Option DBA1200 - Mechanical - IP Option
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