Pure Power

Modern utility vehicles need modern components in their on-board electrical systems. Trends such as efficiency, environmental-friendliness and digitisation are driving the commercial vehicle industry and have impacted on-board electrical system requirements. E-T-A is constantly developing components with this in mind and offers solutions in the field of power and high-voltage relays, as well as intelligent power distribution. Boost your vehicles’ performance by using our products.

Electro-mechanical power relays

Electro-mechanical relays are well-proven technology with many advantages. They are reliable and when used as battery master switches tolerate high overload currents for a short time during the starting procedure. And they do not consume energy when not powered. Another advantage of mechanical relays is the high insulation resistance, the circuit is physically isolated. The classic solution in many applications is still a monostable relay. These are relatively inexpensive, can easily be activated and provide clear switching status during operation and power failure. Many users consider this as a safety feature even if it strongly depends on the application in question.

The rising importance of power consumption and the growing number of loads and in turn power relays in utility vehicles, made design engineers think again. With a classic monostable 300 A relay, the coil power often equals 10-15 W power loss. However, E-T-A’s MPR20 is equipped with energy-saving electronic circuitry that reduces the power consumption by a factor of 10 to less than 1.4W. Electrical energy must also be created in a utility vehicle. Thanks to the low power consumption, monostable relays can significantly contribute to fuel savings. For trucks and buses long operating hours, fuel savings of up to 20 Euros per year per relay are possible.

High voltage relays

The HVR10 is the first hybrid high voltage relay for buses and utility vehicles launched by E-T-A. It combines extraordinary switching performance of ultramodern semi-conductor technology with the reliability of physical isolation in a compact design. A breaking capacity of 2 MW (2000 A @ 1000 V) and the ability to suppress the switching arc over the entire current range up to 2000 A via electronic circuitry, thus minimizing wear and tear, are only two unique selling points of this high-voltage relay. E-T-A has worked on high voltage applications since 2012. Most of the time, this was customer-specific design work. We are very pleased that this new product is available to all our customers. We are looking forward to talking to you also about tailor-made high voltage products or power distribution systems.

Intelligent power distribution with CAN connection

More intelligent and complex systems and the electrification of loads currently play a decisive role in developing on-board electrical systems. The SCS200 is the right solution for these requirements. It is an intelligent power distribution system, allowing decentralised control and monitoring of loads via the CAN bus. The design features pcb-based power distribution in a compact IP67 enclosure. The SCS200 modules are plug & play solutions that allow you to reduce wiring and save space. Comprehensive diagnostic capabilities (integral load protection, load current and voltage measurement, output status) and the integrated CAN connection of the SCS200 enable preventive maintenance and load management.