The HS9Z-A52A is a compact solenoid interlock switch featuring 4 contacts in a right-angle actuator key configuration, designed for machine safety and access control applications. With dimensions of 35 × 40 × 146 mm, it is the world's smallest 4-contact solenoid interlock switch and offers flexible installation with a rotatable head allowing 8 different actuator entry positions. The switch incorporates a metal actuator entry slot for extended service life, gold-plated contacts with direct opening NC contacts per IEC/EN60947-5-1, and an LED pilot light to indicate solenoid status. It provides 1000 N minimum actuator locking strength, operates with a standard 3 m cable (1 m and 5 m available on request), and achieves IP67 protection rating. The proprietary actuator design prevents unauthorized access in compliance with ISO14119 and EN1088, making it ideal for machinery guarding, emergency stop systems, and safety interlocks where controlled access and high reliability are critical.