The Siemens EH3B040 is a durable molded case circuit breaker designed for reliable protection of electrical distribution systems in commercial and industrial applications. Featuring a thermal magnetic non-interchangeable trip unit, this breaker provides effective overload and short-circuit protection to ensure operational safety and equipment reliability. Its EH frame construction and bolt-on mounting configuration deliver secure installation and dependable long-term performance. Designed for use with 240VAC and 480VAC systems operating at 50/60Hz, the EH3B040 offers high interrupting capacity and consistent circuit protection for demanding electrical environments.

Product Specifications

• Brand: Siemens / ITE
• Model: EH3B040
• Product Type: Molded Case Circuit Breaker (MCCB)
• Frame Type: EH
• Rated Current: 40 Ampere
• Number of Poles: 3 Pole
• Trip Unit Type: Thermal Magnetic Non-Interchangeable
• Mounting Type: Bolt On
• Frequency: 50/60Hz
• Terminal Type: Line and Load End Terminals Standard
• Lug Type: Load End Only
• Application: Commercial and Industrial Power Distribution

Technical Specifications

• Interrupting Capacity: 65kA @ 240VAC
• Interrupting Capacity: 18kA @ 480VAC
• Maximum Voltage Rating: 480VAC
• Operating Temperature Reference: 40°C
• Protection Type: Overload and Short Circuit Protection
• Connection Type: Bolt-On Connection
• Frame Construction: Molded Case Design
• Standard Compliance: Industrial Circuit Protection Standards

Voltage and Ratings

• Rated Operational Voltage: 240VAC / 480VAC
• Frequency Rating: 50/60Hz
• Current Rating: 40A
• Pole Configuration: 3 Pole
• Interrupting Rating at 240VAC: 65 Kiloampere
• Interrupting Rating at 480VAC: 18 Kiloampere
• Maximum Voltage Capacity: 480VAC

Product Data

• Manufacturer: Siemens / ITE
• Product Series: EH Frame Style
• Product Condition Support: New Surplus & Certified Reconditioned
• Warranty: 1 Year In-House Warranty
• Installation Type: Bolt-On Mounting
• Terminal Configuration: Standard Line and Load End Terminals
• Product Use: Electrical Distribution and Protection Systems

Important Note

Product images are intended for identification purposes only and may represent a standard base model. Accessories purchased together with the breaker can be installed at no additional cost when configuration details are included during checkout. Installation, maintenance, and servicing should only be performed by qualified electrical professionals in accordance with applicable electrical codes and manufacturer guidelines. The included one-year warranty covers repairs, labor, replacement parts, and standard shipping associated with recertification, excluding damage caused by misuse, improper installation, or normal wear and tear.