Key Features
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Siemens 5ST3040 undervoltage release
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Rated control voltage: 230 V AC
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6-terminal connection design
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SENTRON additional component
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Designed for compatible 5SL4, 5SY and 5SP miniature circuit breakers
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Also compatible with 5SU1 RCBO and 5SV RCCB/FI devices
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5ST3805-1 handle coupler is required when used with 5SU1
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With integrated auxiliary switch
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Mounting width: 1 MW (18 mm)
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Rated frequency: 50/60 Hz
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Designed to trip the connected protective device when the control voltage is interrupted or falls too low
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Can prevent the mounted device from closing when the required control voltage is not available.
Applications
The Siemens 5ST3040 can be used in:
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Industrial electrical control panels
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Machine safety circuits
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Emergency-OFF arrangements
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Remote tripping applications
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Electrical distribution systems
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MCB and RCBO control circuits
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RCCB-related installations
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OEM electrical equipment
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Automation panels
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Industrial machinery
Benefits
The Siemens 5ST3040 helps add undervoltage monitoring functionality to compatible SENTRON protective devices. If the supply voltage to the undervoltage release is interrupted or drops below the required operating level, the mounted protective device trips. This feature can also prevent the device from being switched on when the required control voltage is unavailable.
It is particularly useful in control and safety-related applications where loss of the control voltage should result in disconnection of the associated circuit. Siemens documentation lists undervoltage releases for integration into applications such as emergency-off loops; however, the overall circuit must be designed according to the applicable safety requirements.
For 5SU1 RCBO applications, the compatible 5ST3805-1 handle coupler is required for installation.
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 5ST3040?
It is a 230 V AC undervoltage release with 6 terminals for compatible Siemens SENTRON MCBs, RCBOs and RCCBs.
2. Which devices are compatible with 5ST3040?
It is designed for compatible 5SL4, 5SY, 5SP, 5SU1 and 5SV device ranges.
3. What happens when the control voltage is interrupted?
The undervoltage release can trip the mounted protective device when the voltage is interrupted or falls too low.
4. What is the rated voltage of 5ST3040?
The rated operational/control voltage is 230 V AC.
5. Is an additional accessory required for 5SU1 RCBO?
Yes. The 5ST3805-1 handle coupler is required when using the 5ST3040 with a compatible 5SU1 RCBO.
6. What is the mounting width?
The Siemens 5ST3040 has a mounting width of 1 MW, equivalent to 18 mm.
