The Piranha IIIH is in service with Denmark (22) and Ireland (80). Denmark was the first customer of the Piranha IIIH vehicles. In 1997 a contract was signed to deliver 22 armored vehicles. First production vehicles were delivered in 1999. In 2001 11 of the Danish Piranha IIIH vehicles were deployed in Kosovo. Ireland was the second country to order these armored vehicles. The first contract for 40 vehicles was signed in 1999. These were delivered between 2001 and 2002. Later a follow-up contracts were signed in 2003 and 2005 for 25 and 15 vehicles respectively.
The Piranha IIIH has a composite armor suite. At the time of its introduction it had the highest level of protection comparing with previous Piranhas and LAV series vehicles.
The Piranha IIIH could be fitted with various weapons, depending on customer requirement. A baseline armored personnel carrier is typically fitted with remotely-controlled 12.7-mm machine gun and coaxial 7.62-mm machine gun, or 40-mm automatic grenade launcher. Some of these APCs are armed with a manually operated weapons. A number of versions were proposed, fitted with turrets and 25-mm or 30-mm cannons.
Vehicle is operated by a crew of 2 or 3. It can carry 8-9 fully-equipped soldiers. Troops enter and leave the vehicle via rear doors. There are roof hatches for observation, firing and emergency exit.
The Piranha IIIH has a front-mounted engine. Five engine options were available. These were the German MTU 6V182 TE22 developing 400 hp, Swedish Scania DSJ9-48A developing 400 hp, American Caterpillar 3126 developing 350 hp, American Detroit Diesel 6V53TA developing 350 hp, and British Cummins 6CTAA8.3-T350 developing 350 hp.