Newmar Power 24-12-3 DC Converter for Negative Ground Systems

24-12-3 DC Converter

Convert 17-32 VDC input to 12 VDC negative ground output for powering communication and navigation equipment on negative ground systems. (See Isolated Series for positive ground applications.)

Features:

• Excellent Regulation: Output voltage maintained within 1% under all line and load conditions within the rating
• The heat generated by semi-conductors is extracted and dissipated by large heat sink fins that maximize air contact for cool operation and the long life of components
• Polyurethane conformal coating on PC boards and corrosion-resistant anodized aluminum cases 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
• Overvoltage protection
• Carries CE mark

Specifications:

• Input Voltage: 17-32
• Output Voltage: 13.6
• Output Amps (Intermittent): 3
• Output Amps (Continuous): 3
• Case Size (H x W x D): 3.5 x 3.5 x 1.75 inches (8.9 x 8.9 x 4.5 centimeters)
• Weight: 1 lb. (.45 kg)
• Output: 13.6 VDC (internally adjustable 12.6 -14.5)
• Ripple: 150 mV P-P maximum
• Regulation: 1% Line/Load
• Switching Frequency: 40 kHz
• Efficiency: 85% Typical.
• Isolation: Output/Chassis; Input/chassis: 250 VDC

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 *24-12-3: 2-minute max. on time
• Idle Current: Less than 100 mA (including power ON light)

Operating Temp Specifications:

• 0-50 degrees C, Derate Linearly From 100% @ 40 degrees C To 50% @ 50 degrees C.
• Thermal shutdown @ 70 degrees C Case Temperature
• Model 24-12-3: Full output -25 degrees to +30 degrees C; Derate linearly from 100% @ +30 degrees C to 45% @ +50 degrees C

Mechanical Specifications:

• Powder-coated aluminum heat sink case
• Front panel terminal block
• Heavy-duty mounting flange
• Conformal coated PC board

Options:

• Operation as battery charger or parallel redundant operation* derate to continuous duty rating (contact factory)

The Newmar Power 24-12-3 DC Converter is a reliable solution for converting 17-32 VDC input into a stable 13.6 VDC negative ground output, ideal for powering communication and navigation equipment in negative ground systems. Its robust design ensures consistent performance in demanding environments, making it suitable for marine, RV, and industrial applications. The converter features excellent regulation, maintaining output voltage within 1% across all line and load conditions, which guarantees stable power delivery to sensitive electronic systems. The internal components are protected by a polyurethane conformal coating and housed in a corrosion-resistant anodized aluminum case with heavy-duty shock mounts, ensuring durability and long-term operation even in harsh conditions. Its high-efficiency switching at 40 kHz minimizes heat generation, which is dissipated effectively by large heat sink fins, promoting cool operation and extending component life. The device incorporates numerous protection circuits, including current limiting, thermal shutdown, short circuit proofing, reverse polarity, and overvoltage protection, providing peace of mind during operation. Designed with versatility in mind, the converter supports intermittent and continuous duty cycles, with a maximum on time of 2 minutes for intermittent use and full 24-hour operation at continuous duty, making it adaptable to various power demands. Its compact case measures approximately 3.5 inches in height and width, with a depth of 1.75 inches, and weighs about 1 pound, making installation straightforward in tight spaces. Operating in temperatures from 0 to 50°C, the converter features thermal shutdown at 70°C and derates linearly at higher temperatures to ensure safe operation. The device's construction includes a powder-coated aluminum heat sink case, a front panel terminal block, and a heavy-duty mounting flange, facilitating secure installation. Optional features allow for battery charging or parallel redundant operation, enhancing system flexibility. The Newmar Power 24-12-3 is CE-marked, ensuring compliance with international safety standards, and is built to withstand challenging environments with its rugged construction and comprehensive protection features. Whether used in vehicle, marine, or industrial settings, this converter provides a dependable power conversion solution, backed by the manufacturer's direct support for any technical concerns.

Features:

• Excellent regulation maintains output within 1% under all line and load conditions

• Large heat sink fins optimize air contact for cool operation and component longevity

• Polyurethane conformal coating and corrosion-resistant anodized aluminum case ensure durability in hostile environments

• Numerous protection circuits including current limiting, thermal shutdown, short circuit proof, reverse polarity, and overvoltage protection

• Supports intermittent and continuous duty cycles with flexible operation options

• Compact design with approximately 3.5 inches in height and width, weighing about 1 pound

• Operating temperature range from 0° to 50°C with thermal shutdown at 70°C

• Rugged construction featuring powder-coated aluminum case, front panel terminal block, and heavy-duty mounting flange

• Internally adjustable output voltage from approximately 12.6 to 14.5 VDC

• High efficiency of about 85% with switching frequency of 40 kHz