The NOsparc MMYac is a two terminal contact arc suppressor that attaches across the contact points of a power relay or contactor. The product is designed to protect the contact points from premature destruction due to contact current arcing. The destructive power of electrical current contact arcing is the primary factor determining the operating performance and lifespan of a power relay or contactor. NOsparc MMYac™ is a two terminal arc suppressor designed to protect the contact points of relays from the effects of electrical current contact arcing. This allows the relay or contactor to operate more consistently and reliably ... over a much longer period of time. The NOsparc MMYac™ (AC power applications) has a simple, elegant and straightforward design that allows it to be connected across the two contact terminals on existing products and equipment with just two wires! It is tolerant of harsh environments due to its rugged construction and highly reliable design methodology. During normal relay or contactor operation, the NOsparc MMYac detects the nascent arc as if forms and suppresses its energy all within about 5µs (5 millionths of a second!). The result is a low energy “arclet” with arc energy of only a few µJ as opposed to a full contact arc that is hundreds of mJ (or more). This allows an arc suppression factor to be calculated from the difference in energy. For example, at 20A, 240V, the NOsparc MMYac has an arc suppression factor of 1250.