Product Description

Siemens Auxiliary Switch 2NO – 5ST3011

The Siemens 5ST3011 is an auxiliary switch with 2 Normally Open (2NO) contacts designed for compatible Siemens miniature circuit breakers, incorporated switches, RCBOs and RCCBs. It provides additional contacts for status indication, signalling, monitoring and auxiliary control applications.

The 5ST3011 is suitable for compatible Siemens 5SL, 5SY and 5SP miniature circuit breakers, 5TL1 incorporated switches, selected 5SU1 RCBOs excluding 5SU1…FP/FR versions, and 5SV RCCBs. For compatible 5SU1 RCBO applications, the 5ST3805-1 handle coupler is required.

Key Features

• Siemens 5ST3011 auxiliary switch
• Contact configuration: 2NO
• Two Normally Open auxiliary contacts
• Suitable for status indication and signalling
• Suitable for compatible 5SL miniature circuit breakers
• Suitable for compatible 5SY miniature circuit breakers
• Suitable for compatible 5SP miniature circuit breakers
• Compatible with 5TL1 incorporated switches
• Suitable for compatible 5SU1 RCBOs
• Not suitable for 5SU1…FP/FR versions
• Suitable for compatible 5SV RCCBs
• 5ST3805-1 handle coupler required for 5SU1 applications
• Compact accessory for electrical distribution and control systems

Applications

The Siemens 5ST3011 can be used in:

• Industrial electrical control panels
• Electrical distribution boards
• Status indication circuits
• Remote monitoring systems
• PLC signalling applications
• Building electrical installations
• Automation systems
• Alarm and indication circuits
• Interlocking circuits
• MCB, RCBO and RCCB auxiliary control applications
• OEM electrical equipment

Benefits

The Siemens 5ST3011 auxiliary switch adds two Normally Open contacts to compatible Siemens SENTRON protective devices. These contacts can be used to provide switching signals to external control, monitoring or indication circuits.

The 2NO configuration is useful when the operating status of a connected MCB, RCBO or RCCB needs to be communicated to more than one external circuit or when separate signalling and control functions are required.

For compatible 5SU1 RCBOs, the Siemens 5ST3805-1 handle coupler is required for proper mechanical connection. The 5ST3011 should not be used with the excluded 5SU1…FP/FR versions.

Before installation, always verify the exact base-device version, accessory compatibility, contact rating and wiring requirements.

Suitable for Customers Across India

SB Smart supplies Siemens industrial electrical products for panel builders, OEMs, electrical contractors, system integrators and industrial maintenance teams across Faridabad, Delhi NCR, Noida, Gurgaon/Gurugram, Mumbai, Pune, Ahmedabad, Hyderabad, Bengaluru/Bangalore, Chennai, Kolkata, Chandigarh, Ludhiana and other industrial locations across India.

FAQs

1. What is Siemens 5ST3011?
It is a Siemens auxiliary switch with 2 Normally Open (2NO) contacts for compatible miniature circuit breakers, incorporated switches, RCBOs and RCCBs.

2. What does 2NO mean?
2NO means the device has two Normally Open auxiliary contacts for signalling or control applications.

3. Which Siemens MCB series are compatible with 5ST3011?
It is designed for compatible 5SL, 5SY and 5SP miniature circuit breakers.

4. Can 5ST3011 be used with 5SU1 RCBOs?
Yes, with compatible 5SU1 RCBO versions, excluding 5SU1…FP/FR versions. A 5ST3805-1 handle coupler is required.

5. Is it compatible with Siemens 5SV RCCBs?
Yes, the auxiliary switch is suitable for compatible 5SV RCCB applications.

6. What is the purpose of an auxiliary switch?
An auxiliary switch provides additional contacts for status signalling, remote monitoring, indication, interlocking and connection to external control circuits.