Siemens SENTRON 5ST3803 Locking Device for MCB/RCCB, Lockable, Grey

Prevent unauthorized switching of miniature circuit breakers and residual current circuit breakers with the Siemens SENTRON 5ST3803 locking device. This tool-free, padlockable accessory secures the toggle of compatible Siemens 5SY, 5SP, 5SL, and 5SU series breakers, ensuring only authorized personnel can operate the circuit.

Overview

The 5ST3803 is a robust locking device made from grey polyamide (PA6), designed to fit directly onto the breaker toggle without any tools. It accommodates padlocks with a shackle diameter of up to 6 mm, providing a simple yet effective means of lockout/tagout for electrical safety procedures.

What stands out

• Tool-free installation on the breaker toggle
• Accepts padlocks up to 6 mm shackle diameter
• Compatible with Siemens 5SY, 5SP, 5SL, and 5SU series
• Durable polyamide (PA6) construction
• Grey colour blends with standard breaker panels

Technical details

• Product Type: Locking Device
• Application: Miniature Circuit Breakers (MCB), Residual Current Circuit Breakers (RCCB)
• Function: Prevents unauthorized switching, secures against accidental operation
• Locking Mechanism: Padlockable (padlock not included)
• Compatibility Series: Siemens 5SY, 5SP, 5SL, 5SU
• Mounting Type: On device toggle/lever
• Material: Polyamide (PA6)
• Colour: Grey
• Manufacturer Series: SENTRON
• Installation: Tool-free
• Max. Padlock Shackle Diameter: 6 mm
• Environmental Compliance: RoHS Compliant
• Standards: IEC 60947-1

Our verdict

A reliable and straightforward lockout solution for Siemens breakers, the 5ST3803 enhances workplace safety by preventing accidental or unauthorized switching. Its simple, tool-free design and durable material make it a practical addition to any electrical distribution setup.