Alps SDU3P Power Switch DUAL 5A/80A/250VAC NAD 3020 Realistic Marantz Sanyo
All will have a mounting bracket that fits a Nad 3020 and is included. These have M3 threaded mounting holes 20mm apart. 5A Continuous & 80A for temporary inrush current when switch powered on. Sanyo JCX-2600K, JCX-2900K.