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Step-up voltage regulator – Independant passive dissipation – Input 44V to 56V – Output 58V / 2400W – SUR-4456-5842

This mini regulator (with an exceptional efficiency of 99%) can for example charge lithium batteries (48V nominal, 58V charged) with a constant current limitable from 42A to 4A and a fixed or adjustable constant voltage.


Input voltage of this DC-DC boost converter: 44 to 56 V
Output voltage: 58 V
Output current: 42 A
Output power: 2400 W
Efficiency: 99%


  • Can fast-charge a high-capacity lithium battery from a powerful 48V alternator
  • Can power various motors
  • Very high efficiency allowing reduced dimensions and low weights
  • Limitable output current

Mechanical data

  • Dimension: 85 x 40 x thickness 33 mm (including connectors)
  • Weight: 190 g
  • Easy mounting

For more information:

Download here the PDF presentation for this step-up regulator

Additional information

Weight 490 g
Dimensions 150 × 120 × 100 mm
Product family

step-up voltage regulators

Input voltage

45V to 56V

Output voltage


Output current


Output power


Type of cooling

independant passive dissipation



  • Limited overloads: as long as decreasing Vout remains ≥ Vin + 0.5V
  • Abnormal overloads: please add a fuse or current-limiter on the output or input
  • Under-voltage or sufficient input over-voltage: the regulator no longer elevates the input voltage
  • Filters: input and output; shields: two parallel metallic plates
  • Thermal protection: lowering of Vout to # Vin – 0,5V (automatic reset)
  • Vibrations, tropicalisation, sealing: iP63 to iP65 casting
  • Stainless steel for the clamping braces
  • Ohmic wire loss reduction, with connectors receiving sections up to 72mm2

Standards and specifications

  • Marking CE/UL 60950-1 / EN 60950-1 / iEC 60950-1 / RoHS / 55022A if optional external filter
  • Flammability: horizontal test for electrical applications, according to UL 94 HB standard
  • Worldwide manufacturers for active parts. Patent, assembling and final controls: Elecdan Converter