Newmar 48-12-6I DC-DC Converter Isolated Ground

Convert 20-50 VDC to 12 or 24 VDC output for powering communication/ navigation equipment, on negative ground systems. (see Isolated series, below for positive ground applications.) Ideal for powering voice, data and navigation transceivers in mobile and marine applications.

• Excellent Regulation: Output voltage maintained within 1% under all line and load conditions within rating.
• Heat generated by semi-conductors is extracted and dissipated by large heat sink fins that maximize air contact for cool operation and long life of components.
• Polyurethane conformal coating on PC boards and corrosion-resistant anodized aluminum case with heavy duty shock mounts assure survival in hostile environments.
• Numerous converter and load protection circuits: Current limiting*; automatic thermal shutdown; short circuit proof*; reverse polarity and overvoltage protection*. Except 3 Amp.
• Carries the CE mark

Isolated series
Same features as Standard Series, but with the additional capability of permitting connection of negative ground gear to positive or floating ground battery systems, or vice-versa. Many models may also be used as 12 or 24 volt stabilizers for highly input voltage sensitive equipment.

Input range:10-56 VDC; positive, negative or floating ground.
Output: 12 or 24 VDC, 3 to 35 amps.

Performance Specifications – Standard & Isolated Series

• Output: 13.6 VDC (internally adjustable 12.6-14.5) or 24.5 VDC (or specify)
• Ripple: 150 mV P-P maximum
• Regulation:
  • Standard: 1% Line/Load
  • Isolated: 2% Line/Load
  • except + 3% Line/Load
• Duty Cycle Ratings*
  • Intermittent – 20 minutes max on time, 20% duty. Current limit set at approx. 105% of intermittent rating
  • Continuous – 24 hours, 100% duty
• Idle Current:
  • Standard Series: Less than 100 mA (including power “ON” light )
  • Isolated Series: approx. 50 mA
• Operating Temp: 0-50 deg C, Derate Linearly From 100% @ 40 deg C To 50% @ 50 deg C Thermal shutdown @ 70 deg C Case Temperature
• Switching Frequency:
  • Standard: 40 Khz**
  • Isolated: 70Khz
• Efficiency: 85% – Typical.+
• Isolation:
  • Output/Chassis; Input/chassis: 250 VDC
  • Input/Output: 250 VDC (Isolated Series only)
• Certification: Carries the CE mark (Standard Series only)

**except 32-12-3 – Linear, Non-Switching
+except 32-12-3- 50% @ 24 VDC Input