इसी प्रकार के2SC4221

• 2SC4002
  • NPN epitaxial planar silicon transistor, high-voltage driver application
• 2SC4003
  • NPN epitaxial planar silicon transistor, high-voltage driver application
• 2SC4005
  • NPN epitaxial planar silicon transistor, driver application
• 2SC4006
  • NPN epitaxial planar silicon transistor, driver application
• 2SC4027
  • NPN epitaxial planar silicon transistor, high-voltage switching application
• 2SC4030
  • NPN transistor for 900V/50mA switching applications
• 2SC4030
  • NPN transistor for 900V/50mA switching applications
• 2SC4031
  • "NPN triple diffused planar silicon transistor, switching application (900V/20mA)"