Siemens CLM42031 Circuit Breaker Lockout Module

Product Description

The SIEMENS CLM42031 is a circuit breaker lockout module designed to prevent unauthorized or accidental re-energization of a circuit during maintenance or service work. The module attaches directly to a compatible circuit breaker, physically blocking the breaker handle from being moved to the ON position. It is a critical lockout/tagout (LOTO) safety accessory used in residential and light commercial electrical panels. Electricians and maintenance technicians install this device as part of standard LOTO procedures required by OSHA and NFPA 70E when servicing electrical equipment.

This lockout module is suited for use in electrical service panels and load centers where circuit breakers require positive lockout during maintenance. It is a compact, direct-mount accessory that does not require tools for installation in most applications, making it practical for field use across a range of service environments including residential, commercial, and light industrial settings.

Key Features

• Physically blocks circuit breaker handle to prevent accidental re-energization
• Supports lockout/tagout (LOTO) compliance per OSHA and NFPA 70E requirements
• Compact form factor for use in tight panel environments
• Direct-mount design with no additional hardware required in most applications
• Lightweight at 2.050 pounds for easy handling and storage

Compatibility

Designed as an OEM-style lockout accessory for compatible Siemens circuit breakers installed in residential and commercial electrical panels. Confirm breaker model compatibility before installation.

Installation Notes

Installation should be performed by a licensed electrician following all applicable NEC requirements and site-specific LOTO procedures. Always verify the circuit is de-energized and confirmed dead using a calibrated voltage tester before applying any lockout device. Do not force the module onto a breaker that does not accept it, as improper fitment defeats the purpose of the lockout. Follow all applicable OSHA 29 CFR 1910.147 and NFPA 70E guidelines for control of hazardous energy.

Technical Specifications

• Weight: 2.050 pounds
• Length: 1.457 inches
• Width: 1.114 inches
• Height: 0.713 inches
• UPC: 75455400959

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: CLM42031