Siemens Auxiliary Switch 1NO + 1NC – 5ST3010

The Siemens 5ST3010 is an auxiliary switch with 1 Normally Open (1NO) and 1 Normally Closed (1NC) contact designed for compatible Siemens miniature circuit breakers and residual-current protective devices. It provides an additional switching or signalling contact that can be used to monitor the operating status of the associated protective device.

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

Key Features

• Siemens 5ST3010 auxiliary switch
• Contact configuration: 1NO + 1NC
• Provides auxiliary switching and signalling contacts
• Suitable for compatible Siemens 5SL miniature circuit breakers
• Suitable for compatible Siemens 5SY miniature circuit breakers
• Suitable for compatible Siemens 5SP miniature circuit breakers
• Suitable for 5TL1 incorporated switches
• Suitable for compatible 5SU1 RCBOs
• Not suitable for 5SU1…FP/FR versions
• Compatible with suitable 5SV RCCBs
• 5ST3805-1 handle coupler required for 5SU1 applications
• Compact additional component for electrical distribution and control systems

Applications

The Siemens 5ST3010 can be used in:

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

Benefits

The Siemens 5ST3010 auxiliary switch adds an additional 1NO + 1NC contact configuration to compatible SENTRON protective devices. These contacts can be used for signalling, monitoring and auxiliary control functions within electrical systems.

It is useful where the operating position of a connected MCB, RCBO or RCCB needs to be incorporated into an external control, indication or automation circuit. The combination of one normally open and one normally closed contact provides flexibility for different signalling and interlocking requirements.

For compatible 5SU1 RCBO applications, the Siemens 5ST3805-1 handle coupler must be used to mechanically connect the accessory. The 5ST3010 is not intended for the 5SU1…FP/FR versions mentioned in the compatibility specification.

Before installation, always verify the exact protective device version, accessory compatibility, contact ratings 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 5ST3010?
It is a Siemens auxiliary switch with 1NO + 1NC contacts for compatible SENTRON miniature circuit breakers, incorporated switches, RCBOs and RCCBs.

2. What does 1NO + 1NC mean?
It means the auxiliary switch has one Normally Open contact and one Normally Closed contact.

3. Which Siemens MCBs are compatible with 5ST3010?
The accessory is designed for compatible 5SL, 5SY and 5SP miniature circuit breakers.

4. Can 5ST3010 be used with 5SU1 RCBOs?
Yes, with compatible 5SU1 RCBO versions, but it is not suitable for 5SU1…FP/FR versions. The 5ST3805-1 handle coupler is required.

5. Can it be used with Siemens 5SV RCCBs?
Yes, it is designed for compatible 5SV RCCB applications.

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