Overview

The Siemens ED63A003 circuit breaker is part of the Sentronâ„¢ ED6 molded case family, engineered for reliable protection in motor and load circuits. This 3-pole, 3A breaker operates at 600VAC/250VDC, making it suitable for industrial and commercial electrical systems requiring dependable overload and short-circuit protection. The ED6-ETI design incorporates magnetic-only trip functionality without thermal compensation, ideal for motor circuit protector (MCP) applications.

Key Features

• 3-pole molded case design with bolt-on mounting for compact panel installation
• Magnetic instantaneous trip range: 10–35A adjustable for flexible application tuning
• 600VAC 50/60Hz and 250VDC dual voltage rating for AC and DC circuits
• Standard interrupting capacity of 18 kAIC @ 600V (25 kAIC @ 480V)
• UL489 and CSA C22.2 listed with proven reliability in critical applications
• No lugs included—compatible with standard SA1E025 load lug kits (Cu 14–10 AWG, Al 12–10 AWG)

Technical Specifications

The ED63A003 delivers precise electrical protection across a broad range of industrial environments:

• Current Rating: 3A
• Poles: 3 (three-pole design)
• Voltage (AC): 600VAC @ 50/60Hz
• Voltage (DC): 250VDC
• Trip Type: Magnetic instantaneous (no thermal element)
• Trip Setting Range: 10–35A adjustable
• Motor FLA Range: 0.76–3.18A
• Interrupting Capacity: 18 kAIC @ 600VAC (25 kAIC @ 480VAC)
• Frame Type: ED6 molded case
• Mounting: Bolt-on
• Dimensions: 3" W × 4" D × 6.34" H
• Certifications: UL489, CSA C22.2, IEC 60947-2 compliant
• UPC: 783643210806

Typical Applications

The ED63A003 serves as a motor circuit protector (MCP) in:

• Three-phase motor protection and branch circuits
• Industrial switchgear and motor control centers (MCCs)
• Variable frequency drive (VFD) input circuits and DC systems
• Machine tool and pump motor starters
• Commercial and light industrial load distribution

Compatibility & Replacements

The ED63A003 is a Siemens Sentron™ type ED6 breaker with no thermal-magnetic hybrid function—it operates purely on magnetic instantaneous trip principles. Standard industry connections use UL-listed load lugs (sold separately). While similar amperage breakers from other manufacturers (Eaton Cutler-Hammer, Square D PowerPact, ABB) exist, direct replacement compatibility must be verified against your specific panel architecture and UL listing requirements. For applications requiring thermal protection, consult a thermal magnetic variant or separate overload relay. The ED6-ETI design is non-interchangeable with other frame types.