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SMX DC/DC 24V to 12V 35A Voltage Converter, Regulator (SmartCraft v2.x, with VIP Box)


SMX DC/DC 24V to 12V 35A Voltage Converter, Regulator for SmartCraft v2.x Engines with the white/black VIP Interface Box.

Replacement for Cummins Voltage Regulator TR300 (Part: 4945991 (25A), 4988743 (10A))


Shipping Weight

5 lbs

Shipping Dimensions 10 × 8 × 7 in

In stock


  • Constant Rating – All units are continuously rated at the published current at 40°C ambient temperature i.e. the 25Amp version is 25 Amps continuous.
  • Intermittent Rating – All units have up to a 25% rating over the continuous rating at a maximum of 50% duty cycle for 10 minutes.
  • Momentary Rating – All units peak at greater than 25% of continuous rating for a period of 10 seconds.
  • Input Voltage – Minimum start-up voltage is 20VDC but will allow input dip down to 17V during operation. Maximum input voltage is 33VDC.
  • Power Efficiency – Conversion efficiency varies depending upon load but minimum expected is 90% with a peak of 94%. Average is nominally 93%.
  • Standby Power – With no load connected (idle mode) average current draw is less than 25mA. With remote isolation enabled the average standby current is less than 10mA.
  • Output Ripple – Less than 20mV peak to peak.
  • Load Regulation – Less than 1% variation up to full load rating.
  • Line Regulation – Less than 1% variation subject to voltage input min/max specification.
  • Environmental Considerations – Operating temperature range is -25°C to + 50°C and ideally humidity should not exceed 90%.
  • Conformity – Conforms to Electro Magnetic Compatibility (EMC) standards as follows: IEC 61204-3 for low voltage power supplies, DC output, components EN61000-4-2 to EN61000-4-6 and AS/NZS CISPR 11 Group 1, Class B.
  • Construction – Manufactured using corrosion resistant materials throughout, including anodised 6063 aluminium, ABS/ PC plastics and stainless steel hardware. No ferrous materials are used and all PCB assemblies feature conformal coating (tropicalisation).