DC - DC Converters: Mobile and Stationary Applications

Wilmore DC - DC converters for mobile applications power all types of 12-volt and 24-volt electronic equipment on construction and maintenance vehicles, forklifts, industrial vehicles, transit buses and rail vehicles.

Our DC - DC power converters for 74-volt and 110-volt railroad locomotives and 24-volt and 36-volt rail/transit vehicles are transient protected and mechanically rugged. We can provide converters to operate a variety of DC-powered on-board electronics with power requirements from a few watts to several hundred watts.

For stationary (fixed location) applications such as communications network installations and railroad track-side (wayside) sites, many of the DC-to-DC converters shown here provide output voltage regulation and input-output isolation in addition to voltage conversion.

Examples of our DC - DC converters are shown below. Please scroll down for descriptions of these products and links to the Product Bulletins.

Isolated 12V to 12V DC - DC Converters

The Model 1730-12-12-2 DC-to-DC converter provides a regulated and well-filtered 13.6-VDC output from 12-VDC battery systems. This output is galvanically isolated from the source and chassis and, therefore, may be connected either as a positive or a negative output. Designed to perform equally well in mobile and stationary applications, these converters can be used to operate low-power radio transceivers, data modems and other sensitive electronic loads.

Model 1730-12-12-2 (Front View)

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Model 1730 DC - DC Converter

• 12 VDC input voltage
• 12 VDC output voltage, 2A
• Input to output isolation (isolate from signal battery)
• Stationary (wayside) and mobile applications

Dimensions given in inches (mm):

• 1.7" (43.1) high x 5.3" (134.6) wide x 7.7" (195.5) deep (excluding terminal blocks).
• Baseplate mounting holes accept #10 hardware on a 4.9" x 4.9" pattern.

Product Bulletin (PDF file)

• 12V Input (Model 1730)

High Isolation 12V and 24V DC - DC Converters

Series 1675 DC-to-DC converters provide a regulated and filtered DC output voltage from either 12-volt or 24-volt battery systems. This output is galvanically isolated from the source and chassis and, therefore, may be connected either as a positive or a negative output. Designed to perform equally well in mobile and stationary applications, these converters can be used to power radio transceivers, telecommunications equipment and other sensitive electronic loads.

Model 1675-12-12-15 (Front View)

Model 1675-12-24-8 (Front View)

Series 1675 Product Dimensions

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Series 1675 DC - DC Converters

• 12 and 24 VDC input voltages
• 12, 24, and 48 VDC output voltages
• 200 watt output power
• 2,000-volt isolation between input-to-output and input-to-chassis
• Stationary (wayside) and mobile applications

Dimensions given in inches (mm):

• 3.6" (91) high x 6.1" (155) wide x 10.3" (262) deep, including mounting flanges and terminal block

Product Bulletin (PDF file)

• 12V and 24V Input (Series 1675)

Wide Input (20-56 VDC) DC - DC Converters

Series 1640 DC-to-DC converters provide an isolated, regulated and well-filtered DC output voltage from 24-VDC, 36-VDC or 48-VDC battery systems. Applications include powering voice and data radio transceivers and other critical electronic equipment in harsh vehicular environments. Models with 13.6-VDC output at 15 amperes (Model 1640-12-15) and 7.5 amperes (Model 1640-12-7.5) are described in the product bulletin. Technical information on other versions with output voltages in the range of 5 to 28 volts is available on request.

Model 1640-12-7.5 (Front View)

Model 1640-12-15 (Front View)

Series 1640 Product Dimensions

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Series 1640 DC - DC Converters

• Accepts 24, 36, and 48 VDC input voltages
• 12 and 24 VDC output voltages at 7.5 or 15A (others available)
• 100 and 200 watt output power
• Isolated, regulated output
• DC power converter for forklifts and industrial vehicles

Dimensions given in inches (mm):

• For 7.5-ampere models: 1.9" (48) high x 7.0" (177) wide x 9.0" (228) deep (excluding flanges, terminal block and fuse holder).
• For 15-ampere models: 3.0" (76) high x 7.0" (177) wide x 9.0" (228) deep (excluding flanges, terminal block and fuse holder).
• Mounting flange on base is 0.5" (13) wide (each side). Fuse holder extends 0.65" (16.5) from front panel.

Product Bulletin (PDF file)

• 24V, 36V, and 48V Input (Series 1640)

Extended Input Range DC-DC Converters

Series 1640XR DC-to-DC converters provide an isolated, regulated and well-filtered DC output voltage from nominal 24V, 48V, and 130V battery systems. This output is galvanically isolated from the source and chassis and, therefore, may be connected either as a positive or a negative output. Two available input-voltage ranges (20V-80V and 40V-150V) allow one version of the converter to cover multiple battery voltages. Designed to perform equally well in mobile and stationary applications, these converters can be used to power radio transceivers, telecommunications equipment and other sensitive electronic loads. Models with outputs of 13.6 VDC and 24 VDC are described in the product bulletin.

Models with outputs of 13.6 VDC and 24 VDC are described in the product bulletin. Technical information on other versions with output voltages in the range of 5 to 28 volts is available upon request.

Model 1640XR-48/130-13-15 (Front View)

Series 1640XR Product Dimensions

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Series 1640XRDC - DC Converters

• Two extended input range versions: 20V-80V and 40V-150V
• 200-watt and 100-watt models
• Input-to-output isolation
• -40°C to 70°C temperature range
• Convection cooled
• Electrically and mechanically rugged

Dimensions given in inches (mm):

• For 100-watt models: 1.9 (48) high x 7.0 (177) wide x 9.0 (228) deep (excluding flanges and terminal block).
• For 200-watt models: 3.0 (76) high x 7.0 (177) wide x 9.0 (228) deep (excluding flanges and terminal block).
• Mounting flange on base is 0.5 (13) wide (each side). Terminal block extends approximately 0.5 (13) from front panel.

Product Bulletins (PDF files)

• 100-Watt and 200-watt (Series 1640XR)

Wide Input (20-130V) DC - DC Converters for Locomotives

Series 1620XR DC-to-DC converters provide an isolated, regulated and well-filtered DC output voltage from 74-VDC and 37-VDC electrical systems on locomotives and other rail vehicles. An extended input voltage range enables these converters to continuously power onboard electronics in the presence of large variations in the vehicle’s battery voltage. A field-proven input-transient protection system, conservative electrical design and extremely rugged mechanical construction make them especially suited for powering voice-data radios and other sensitive electronic loads in the harsh railroad vehicle environment.

Model 1620XR-13-7.5-1 (Front View)

Model 1620XR-13-15-1 (Front View)

Series 1620XR-1 Product Dimensions

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Series 1620XR DC - DC Converters

• 20-130 VDC input voltages
• 12 and 24 VDC output voltages
• 100-watt or 200-watt output power models
• Input-surge/transient protection
• Isolated, regulated output

Dimensions given in inches (mm):

• For 100-watt models: 1.9" (48) high x 7.0" (177) wide x 9.0" (228) deep (excluding flanges and terminal block).
• For 200-watt models: 3.0" (76) high x 7.0" (177) wide x 9.0" (228) deep (excluding flanges and terminal block).

Product Bulletins (PDF files)

• 20-130 Volt Input (Series 1620XR-1)

Locomotive/Rail-Transit

Series 1620 and 1620H DC-to-DC converters provide an isolated, regulated, and well-filtered DC output voltage from 37, 74, or 110-VDC electrical systems on locomotives and other rail vehicles. A field-proven input transient protection system and extremely rugged mechanical construction make them especially suited for powering voice/data radios and other sensitive electronic loads in the harsh railroad vehicle environment.

Model 1620H-74-13-30 (Front View)

Series 1620H Product Dimensions

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Series 1620 / 1620H DC - DC Converters

• 36, 74, and 110 VDC input voltages
• 12 and 24 VDC output voltages
• 100, 200 and 400 watt output power
• Input-surge/transient protection
• Isolated, regulated output

Dimensions given in inches (mm):

• For 110v 100-watt models: 1.9" (48) high x 7.0" (177) wide x 9.0" (228) deep (excluding flanges and terminal block).
• For 110v 200-watt models: 3.0" (76) high x 7.0" (177) wide x 9.0" (228) deep (excluding flanges and terminal block).
• For 37V and 74v 400-watt models: 3.25" (83) high x 8.6" (218) wide x 11.25" (286) deep (excluding flanges and terminal block).

Product Bulletins (PDF files)

• 37 Volt Input, 400W (Series 1620H)
• 74 Volt Input, 400W (Series 1620H)
• 110 Volt Input (Series 1620)

74V to 14.2V 400-Watt DC to DC Converters

This DC-DC converter provides an isolated, regulated and well-filtered 14.2-VDC output from a 74-VDC locomotive electrical system. The unit is rated for a continuous output current of up to 30 amperes and operates at high efficiency with a very low quiescent current drain, making it ideally suited for powering both continuous-duty electrical loads and equipment such as radio transceivers where extended periods of operation in “standby” mode are encountered. Rugged mechanical construction and conservative electrical design are intended to ensure long service life and dependable performance in onboard applications.

Model 1740-74-14-30 (Front View)

Model 1740-74-14-30 Product Dimensions

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Model 1740 DC - DC Converter

• 74 VDC input voltage
• 14.2 VDC output voltage
• 400-watt output power rating
• Input surge/transient protection
• Input-to-output isolation
• -40°c to +70°c operating temperature range (convection cooled)
• Mechanically rugged and conservatively rated

Dimensions given in inches (mm):

• 4 Modular Concept Units (MCU’s) as defined in Association of American Railroads Standard S-590.

Product Bulletins (PDF files)

• 74V Input (Model 1740)

74V DC Power Conditioner for Locomotives

The Model 1743-74-10 power conditioner is a DC-DC converter that enables nominal 74-volt electronic equipment to operate through wide variations in the locomotive power bus while also providing additional filtering and transient-withstand protection. The converter automatically boosts abnormally low input voltages and limits abnormally high input voltages to within approximately 60 to 80 VDC. At input voltages in the normal operating range between these undervoltage/overvoltage anomalies, the converter provides a filtered and protected output voltage that is directly proportional to its input voltage. Conservative electrical design, very high operating efficiency and rugged mechanical construction make this converter well suited for powering voice/data radios and other sensitive electronic loads in the harsh railroad vehicle environment.

Model 1743-74-10 (Front View)

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Model 1743 Power Conditioner

• Operate locomotive electronics through undervoltage/overvoltage power bus anomalies
• 20-135 VDC Operating input voltage
• 60-80 VDC Output voltage at up to 10 amperes output current
• -40°C to +70°C Operating temperature range, convection cooled
• Mechanically rugged and conservatively rated

Dimensions:

• 3 Modular Concept Units (MCU’s) as defined in Association of American Railroads Standard S-590.

Product Bulletins (PDF files)

• 74V Input (Model 1743)

12V/24V Input 74V Output DC - DC Converters for Rail Vehicles

Models 1737-12-74-4 and 1737-24-74-4 are DC-to-DC converters designed to provide a nominal 74-VDC output from 12-VDC and 24-VDC vehicles, respectively. Conservative electrical design, very high operating efficiency and rugged mechanical construction make them well suited for powering voice/data radios and other sensitive electronic loads in the harsh railroad vehicle environment.

Model 1737-12-74-4 (Front View)

Model 1737-12-74-4 Product Dimensions

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Series 1737 DC - DC Converters

• 12 and 24 VDC input versions available
• 74 VDC output voltage
• Output current up to 4 amperes
• -40°C to +70°C operating temperature range
• Convection Cooled

Dimensions given in inches (mm):

• 2.5" (64) high x 8.2" (203) wide x 7.6" (191) deep (excluding flanges and terminal block).
• Mounting flange on base is 0.5" (13) wide (each side).
• Terminal block extends 0.8" (20) from top panel.

Product Bulletin (PDF file)

• 12V and 24V Input (Model 1737)

Locomotive Voltage-Boosting DC - DC Converters

Model 1741-60-3.5 and Model 1741-60-7 DC-to-DC converters are designed to allow nominal 74-volt locomotive equipment to operate through low-input-voltage conditions or on-board 37-volt or 24-volt rail vehicles. When the converter’s input voltage drops below 60 VDC, the converter automatically boosts its output voltage to 60 VDC to continue powering equipment connected to it. At input voltages above 60 VDC, the converter provides additional filtering and transient protection without substantially altering the input voltage. Conservative electrical design, very high operating efficiency and rugged mechanical construction make these converters well suited for powering voice/data radios and other sensitive electronic loads in the harsh railroad vehicle environment.

Model 1741-60-3.5 (Front View)

Model 1741-60-7 (Front View)

Model 1741 Product Dimensions

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Series 1741 Voltage-Boosting DC - DC Converters

• 60 VDC minimum output at input voltages down to 20 VDC
• Output power ratings of 200 and 400 watt
• -40°C to +70°C operating temperature range
• Convection cooled

Dimensions given in inches (mm):

• Model 1741-60-3.5: 1.9" (48) high x 7.0" (177) wide x 9.0" (228) deep (excluding flanges, terminal block and fuse holder).
• Model 1741-60-7: 3.0" (76) high x 7.0" (177) wide x 9.0" (228) deep (excluding flanges, terminal block and fuse holder).

Product Bulletin (PDF file)

• 20-90V Input (Model 1741)

110-VDC to 72-VDC DC - DC Converters

The Series 1744 DC-to-DC converters provide a regulated and well-filtered 72-VDC output voltage from 110-VDC electrical systems on locomotives and other rail vehicles. An extended input voltage range enables these converters to continuously power on-board electronics in the presence of large variations in the vehicle’s battery voltage. The units are able to produce high output power with high conversion efficiency and yet operate with a low standby current. A field-proven input-transient protection system, conservative electrical design and extremely rugged mechanical construction make them especially suited for powering sensitive electronic loads in the harsh railroad vehicle environment.

Model 1744-72-10 (Front View)

Model 1744-72-5 (Front View)

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Series 1744 DC - DC Converters

• 77 - 137.5V extended input range
• 10-ampere and 5-ampere models
• -40°C to +70°C temperature range
• Input surge/transient protection
• Rugged design and construction

Dimensions given in inches (mm):

• Model 1744-72-5: 1.9 (48) high x 7.0 (177) wide x 9.0 (228) deep (excluding flanges and terminal block). Weight: 3.5 pounds (1.6Kg)
• Model 1744-72-10: 3.0 (76) high x 7.0 (177) wide x 9.0 (228) deep (excluding flanges and terminal block). Weight: 5 pounds (2.3Kg)

Product Bulletin (PDF file)

• 5 and 10 ampere output (Series 1744)

24V to 12(13.6)V DC - DC Converters

The Model 1645-24-12-30 provides a well-regulated 13.6-VDC negative-ground output from a 24-VDC negative-ground battery system. The unit is rated for a continuous output current of up to 30 amperes yet operates with a very low standby (no load) current drain of approximately 65 mA. This makes it ideally suited for powering mobile-radio transceivers and other loads when low battery drain under extended “stand-by” conditions is an important consideration. The high conversion efficiency of the Model 1645-24-12-30 minimizes heat generation and enhances long-term reliability. The ruggedized mechanical construction and conservative electrical design ensure long service life and dependable performance in harsh environments such as those encountered in fleet trucks, transit buses, heavy construction equipment and other industrial vehicles and equipment.

Model 1645-24-12-30 (Front View)

Model 1645-24-12-30 (Top View)

Model 1645-24-12-30 Product Dimensions

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Series 1645 DC - DC Converters

• 24 VDC input voltage
• 13.6 VDC output voltage
• 400 Watt (30A) output power
• High power-conversion efficiency (94% typical)
• -30°C TO +60°C temperature range
• Rugged design and construction for mobile applications
• Light weight, low profile, easy to install

Dimensions given in inches (mm):

• 2.5" (64) high x 7.9" (201) wide x 7.9" (201) deep, excluding mounting flanges and terminal block.
• Mounting flange on base is 0.7" (18) wide (each side).
• Terminal block extends 1.0" (26) from front panel.

Product Bulletin (PDF file)

• 24V Input (Series 1645)

Mobile Radio DC - DC Converters

Designed to power 12-volt or 24-volt equipment from a variety of vehicular battery systems, these DC-to-DC converters feature high conversion efficiency, low standby power consumption, good noise suppression, and electrical and mechanical ruggedness.

Model 1649-12-24-15 (Front View)

Model 1650-24-12-15 (Front View)

Model 1649-12-24-15 Product Dimensions

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Series 1649 and 1650 DC - DC Converters

• 24 to 12 VDC and 12 to 24 VDC voltage converters
• Polarity-reversing (-12V to +12V)
• High conversion efficiency
• Low standby power consumption

Dimensions given in inches (mm):

• Model 1649: 1.9" (48.26) high x 4.5" (114.3) wide x 6.9" (175.26) deep excluding mounting flanges and fuse holder.
• Model 1650: 1.9" (48.26) high x 4.5" (114.3) wide x 5.5" (139.7) deep excluding mounting flanges and fuse holder.

Product Bulletin (PDF file)

• 12V and 24V Input (Series 1649)
• 12V and 24V Input (Series 1650)

If you would like additional information about our DC-to-DC converters for mobile communications or other Wilmore Electronics power conversion products, please contact us by email, telephone, or fax using the information shown on this page.