Heavy Duty Engine Ignition System – Hydrogen

SEM FlexiSpark Ignition System – True zero CO2

To rapidly reduce greenhouse gas CO2 emissions and stop global warming, SEM has designed a specific ignition system optimized for hydrogen gas spark ignited internal combustion engines. Hydrogen gas is an attractive fuel, as it is climate neutral and the only true carbon-dioxide emission free fuel.

Go green – Go economical

Hydrogen gas spark ignited internal combustion engines will be an important complement to electrification in the heavy-duty segment, especially in long-haul and heavy load applications. Compared to BEVs and FCEVs, the total cost of ownership is lower and the time to market quicker.

With SEM FlexiSpark® technology inside, our hydrogen ignition system offers a robust solution to meet specific requirements for H2 engines while avoiding challenges such as pre-ignition and excessive spark plug wear.

Ignition system


Capacitive System

Designed to be engine mounted

Up to 6 Cylinders per controller

Flexible Spark Characteristics:
• Available Spark Voltage, up to 40kV
• Spark Duration, 50μs – 3000μs
• Spark Current, 60mA – 200mA

CAN Communication Interface

Spark Voltage Monitoring

Coil On Plug or Pencil Coil

Discover our ignition products

Want to know more?

Contact the sales manager for your region.

 North Europe
Gunnar Jansson
+46 73 056 53 06

 Central & South Europe
Christian Brückner
+49 160 9467 1250

Henry Ma
+86 180 1328 4903

North America
Russell Coleman
+1 317-563-6625