Diode - Severance Diode, SY342. This diode is most commonly used for (but not limited to) Chironex Spartan 500cc and 600cc UTVs (4x4/2x4 and similar variations), Xinyang 500cc - 600cc ATVs and UTVs (4x4/2x4 and similar variations). Severance diodes commonly serve the purpose of rectifiers, signal limiters, voltage regulators etc.