Condition: NIB - The 5U4G/5U3C/5C3S is a filamentary twin diode designed for high current requirements. Directly heated full-wave rectifier 5C3S/5U4G made by SED Winged C. Production date: 1983-1984. Equivalents: U52, 5Z3, 5AS4, 5Z10. Specification: 450Volt/225mA. Recommended for: Manley and Quad.