Auxiliary converters – versatile power supply for onboard applications

The demands on modern mobility are growing and with the further development of rail vehicles, electric buses, and hybrid buses, passenger comfort and information are becoming increasingly important. As a result, the importance of the power supply for electrical and electronic consumers is also growing, for applications like air conditioning and ventilation as well as outlets for charging laptops and cell phones. Auxiliary converters are the critical link between connected consumers and the vehicle power supply – tailored to the requirements of operators and their customers.

Learn more about auxiliary converters from Siemens Mobility:

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We offer the perfect solution

For us, quality and the highest performance are a tradition

We developed and built our first auxiliary converters in 1947. What was true then is still true now: Our auxiliary converters are rugged, reliable, powerful, and highly innovative. Plus they're always precisely tailored to the requirements that our customers bring to us from all areas of railway technology as well as electric buses.

Components you can rely on

We offer you auxiliary converters for all standard voltages and networks: from 750 V, 1,500 V, or 3,000 V to 15,000 V / 16.67 Hz or 25,000 V / 50 Hz single-phase alternating current. At the same time, we fulfill local demands on our technology with a worldwide network of production facilities. The compact, flexible, highly efficient, and modular design of our auxiliary converters is a major contributor to their global success. It allows us to implement individualized solutions for our customers at a reasonable cost. Our large installed base with customers worldwide corroborates our extraordinarily extensive experience and expertise in the area of auxiliary converters. Despite all the modularity, the focus of their development is always the system concept and optimal output, with reliable, durable components and certification for worldwide use. And wherever our customers are counting on us, we're there with our strategically targeted service network.

Cleverly designed

Specific benefits for your business

Another way to benefit from our experience: When developing our systems and components, we're always thinking about the practical application and doing our best to maximize their usefulness.

Rugged, reliable, efficient

Right from the start, auxiliary converters from Siemens Mobility were developed for use under harsh conditions such as very high and very low temperatures and rapid temperature changes. They have proven their worth in decades of efficient operation in all installation locations (underfloor, on the roof, in the vehicle).

High performance, compact construction

Space-saving concepts are welcome in all areas of vehicle construction, not just for rail vehicles. Thanks to short cable routes, reduced wiring, and an especially compact design, the auxiliary converters from Siemens Mobility offer you numerous options for gaining more space for passengers or, for example, improving passenger comfort through larger systems.

Simple engineering, simple service

Thanks to their modular construction, the engineering and installation of our auxiliary converters are extremely simple. What's more, the systems for 750 V and 1,500 V for use in metros use the same housing and the systems are designed so that all the modules are easily accessible for service.

Always tailored

Technical data

Auxiliary converters from Siemens Mobility are always individually adapted to the specific rail vehicles and passenger coaches. Consequently, the technical data specified here is to be understood as typical values for the selected application that we individually tailor to your particular requirements.
* Options
Nominal power / battery charger
20 or 40 kVA/11 kW
90 kVA / 14 kW
Nominal voltage
600 / 750 V DC
600 / 750 V DC
Temperature
–25 °C to +45 °C
–37 °C to +47 °C
Installation / mounting
Roof
Roof
Weight
260 / 300* kg
590 kg
Cooling type
Forced-air cooling
Forced-air cooling
Nominal power / battery charger
MidCap: 120 kVA / 40 kW | HighCap: 170 kVA / 30 kW
Nominal voltage
750 V / 1,500 V DC
Temperature
–25 °C to +45 °C
Installation / mounting
Underfloor
Weight
530 kg / 600 kg
Cooling type
Forced-air cooling
* Module weight only (new platform)
Nominal power / battery charger
160 kVA / 15 kW
Nominal voltage
1,500 V DC
Temperature
–40 °C to +45 °C
Installation / mounting
Upright / overhead
Weight
240 kg*
Cooling type
Forced-air cooling
* Module weight only (new platform)
Nominal power / battery charger
160 kVA / 16 kW
Nominal voltage
1,500 V DC / 3,000 V DC (on request)
Temperature
–40 °C to +45 °C
Installation / mounting
Underfloor
Weight
240 kg*
Cooling type
Forced-air cooling and water cooling
Nominal power / battery charger
3 AC: 40 kVA – 95 kVA
DC: 6 kW – 20 kW
Nominal voltage
Multiple voltage power supply
1,000 V AC
1,500 V AC/DC
3,000 V DC
Temperature
–25 °C to +45 °C
Installation / mounting
Underfloor
Weight
1,350 / 1,550 kg
Cooling type
Forced-air cooling
* Module weight only (new platform)
 
Offboard
Onboard
Nominal power / battery charger

50 kW, 300 kW, 450 kW and 600 kW

(according to IEC 61851-23-1)

Onboard DC/DC converter with 60 kW and 180 kW (double-insulated according to ECE R36)
Nominal voltage
In accordance with customer grid
750 V DC
Temperature
–25 °C to +45 °C
–25 °C to +45 °C
Installation / mounting
Infrastructure
Roof
Weight
n/a
250 kg*
Cooling type
Forced-air cooling
Forced-air cooling
Learn more about auxiliary converters from Siemens Mobility:

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Learn more about the advantages of our auxiliary converters by contacting our experts directly.