Siemens 5ST3010 Circuit Switch

Siemens 5ST3010 is an auxiliary switch for miniature circuit breakers in the SENTRON family (5SL, 5SY, 5SP), delivering one normally open (NO) and one normally closed (NC) contact to provide signaling or interlock functionality alongside the main breaker. It features an integrated switch 5TL1 and is compatible with RCBO 5SU1 (without 5SU1 FP/FR) and RCCB 5SV when used with the handle coupler 5ST3805-1. A UL-listed variant, 5ST3010-0HG, is available for UL 489 applications, while a DIN-rail variant exists as 5ST3010-0CC with the following specifications: 90 mm high, 9 mm wide, 70 mm deep; net weight 0.05 kg; insulation voltage 440 V; IP20 protection; control voltage AC/DC; conductor cross-section 0.5–2.5 mm²; tightening torque 1 N·m; endurance about 10,000 operating cycles; and it occupies one modular width. This accessory augments miniature breakers with a secondary NO/NC signaling or control contact, suitable for control circuits, interlocks, and monitoring in low- to medium-voltage distribution panels.