Accessories for 5SL / 5SY / 5SP, 5TL , 5SV, 5SM2 ,5SU1 -5ST3010 -5ST3020

Product Description

Siemens MCB Accessories – 5ST3010 - 5ST3020

The Siemens 5ST3010 and 5ST3020 are part of the SENTRON 5ST3 series accessories used with miniature circuit breakers such as 5SL, 5SY, 5SP4, 5TL, 5SV, 5SM2, and 5SU1. These accessories are designed to enhance monitoring, signaling, and remote indication in electrical distribution boards and automation systems.

They are commonly installed in industrial panels, commercial DBs, MCCs, and smart building systems to provide real-time status feedback to PLC, SCADA, or BMS systems.

1. Siemens 5ST3010 – Auxiliary Switch (1NO + 1NC)

The 5ST3010 is an auxiliary contact block used to indicate the operating status (ON/OFF) of a circuit breaker.

Key Function

• Provides ON/OFF position feedback
• Works in sync with breaker operation
• Used for control and indication circuits

Contact Configuration

• 1NO + 1NC

Typical Use

• PLC input status feedback
• Indicator lamps (ON/OFF indication)
• Control circuit interlocking
• Panel monitoring systems 
  
  

  2. Siemens 5ST3020 – Fault Signal Contact (1NO + 1NC)

  The 5ST3020 is a fault signal contact designed specifically to indicate tripping due to overload or short circuit.

  Key Function

  • Indicates fault/trip condition only
  • Does NOT follow manual switching ON/OFF like auxiliary switch
  • Used for alarm and fault monitoring systems

  Contact Configuration

  • 1NO + 1NC

  Typical Use

  • Trip alarm indication
  • BMS / SCADA fault signal
  • Safety interlocking systems
  • Emergency shutdown monitoring