Product Description

Siemens SENTRON Fault Signal Contact 1 NO + 1 NC for MCB, RCBO & RCCB – 5ST3020

Product Description

The Siemens SENTRON Fault Signal Contact 5ST3020 is a genuine fault indication accessory designed for compatible Siemens miniature circuit breakers (MCBs), RCBOs, and RCCBs. It provides 1 Normally Open (NO) contact and 1 Normally Closed (NC) contact, enabling reliable remote fault indication and monitoring in electrical distribution and industrial automation systems. This accessory is compatible with Siemens 5SL, 5SY, 5SP miniature circuit breakers, 5SU1 RCBOs, and 5SV residual current devices. For installation with 5SU1 RCBOs, the 5ST3805-1 handle coupler is required.

Unlike a standard auxiliary switch, the 5ST3020 fault signal contact is specifically designed to indicate trip events caused by overload or short-circuit faults, making it an ideal solution for applications requiring accurate fault monitoring and remote signaling. It helps maintenance teams quickly identify fault conditions, improve response time, and reduce system downtime.

The Siemens 5ST3020 is widely used in electrical distribution boards, industrial control panels, switchboards, motor control centers (MCC), OEM machinery, building management systems (BMS), and industrial automation systems. Its compact design, dependable operation, and easy installation make it a preferred accessory for panel builders, electrical contractors, OEMs, and maintenance professionals.

At SB Smart, we supply genuine Siemens SENTRON 5ST3020 Fault Signal Contacts with competitive pricing, expert technical support, bulk order assistance, and fast PAN India delivery.

Key Features

• Genuine Siemens SENTRON accessory

• Fault signal contact with 1 NO + 1 NC configuration

• Provides reliable remote fault indication

• Designed for Siemens MCBs, RCBOs, and RCCBs

• Helps identify overload and short-circuit trips

• Compact and easy-to-install design

• Reliable performance for industrial applications

• Long operational service life

• Suitable for automation and monitoring systems

• Trusted Siemens quality and engineering

Applications

• Electrical Distribution Boards

• Industrial Control Panels

• Motor Control Centers (MCC)

• Switchboards

• Building Management Systems (BMS)

• Industrial Automation Systems

• OEM Control Panels

• Commercial Electrical Installations

• Manufacturing Plants

• Power Distribution Systems

• Infrastructure Projects

• Utility Electrical Networks

Benefits

• Enables remote fault monitoring

• Quickly identifies breaker trip conditions

• Improves maintenance efficiency

• Reduces equipment downtime

• Enhances electrical system reliability

• Supports preventive maintenance

• Simplifies troubleshooting

• Easy integration into existing electrical panels

• Suitable for industrial and commercial installations

Why Buy from SB Smart?

• 100% Genuine Siemens Products

• Competitive Prices

• Expert Technical Support

• Bulk Order Assistance

• Fast PAN India Delivery

• Secure Packaging

• Trusted Industrial Electrical Supplier

• GST Invoice Available

• Responsive Customer Support

Frequently Asked Questions (FAQs)

Q1. What is the Siemens 5ST3020 Fault Signal Contact used for?

It is used to provide remote indication when a compatible Siemens circuit breaker trips due to an overload or short-circuit fault.

Q2. Which Siemens devices are compatible with the 5ST3020?

It is compatible with Siemens 5SL, 5SY, 5SP miniature circuit breakers, 5SU1 RCBOs, and 5SV RCCBs. For 5SU1 RCBOs, the 5ST3805-1 handle coupler is required.

Q3. Where is this fault signal contact commonly used?

It is widely used in distribution boards, MCC panels, control panels, switchboards, industrial automation systems, and commercial electrical installations.

Q4. What is the difference between a fault signal contact and an auxiliary switch?

A fault signal contact changes state specifically when the breaker trips because of a fault, while an auxiliary switch indicates the normal ON/OFF operating position of the breaker.

Q5. Does SB Smart supply genuine Siemens 5ST3020 products?

Yes. SB Smart supplies genuine Siemens SENTRON accessories with technical support, competitive pricing, and fast PAN India delivery.