DZ74-63 Series 4P 10A Mini Circuit Breaker Switch

DZ74-63 Series 4P 10A Mini Circuit Breaker Switch Industrial electrical engineers, power system developers, and automation technicians utilize this 4-pole (4P) 10A miniature circuit breaker to protect multi-phase wiring and machinery against harmful overloads and short circuits. Consequently, it provides simultaneous four-line disconnection to isolate three live phases along with the neutral line instantly when electrical current breaches safe operating thresholds. Therefore, this DIN rail-mounted safety switch serves as an indispensable protection component in three-phase power distribution networks, heavy machinery control panels, and commercial sub-circuit infrastructure.

Key Features:

• Synchronized 4-Pole Interruption: Features an integrated internal trip mechanism that ensures all four poles open simultaneously, preventing single-phasing conditions on downstream loads.
• Advanced Thermal-Magnetic Trip: Combines a bimetallic strip for reliable long-term overcurrent protection with an electromagnetic coil for instantaneous short-circuit defense.
• Standard 35mm DIN Rail Mount: Designed with a heavy-duty spring-loaded clip for quick, toolless snapping directly onto standard industrial mounting rails.
• High-Impact Flame-Retardant Housing: Enclosed in a molded shell made of self-extinguishing plastic with premium thermal resistance to prevent combustion.
• Robust Box Tunnel Terminals: Equipped with secure screw-clamp combination terminals that ensure high-torque electrical connections and minimize terminal heating.

Technical Specifications:

• Model Series: DZ74-63 Series.
• Pole Configuration: 4P (Four Pole – protects 3 Phases + 1 Neutral line).
• Rated Current (In): 10 A.
• Rated Operating Voltage (Ue): 400V AC (Inter-phase) / 230V AC (Phase-to-Neutral).
• Rated Short-Circuit Breaking Capacity (Icn): 4500 A (4.5 kA).
• Tripping Curve Classification: C-Type (Triggers at 5 to 10 times rated current, perfect for inductive and mixed loads).
• Rated Frequency: 50 Hz / 60 Hz.
• Electrical Life Cycles: ≥ 4,000 operations.
• Mechanical Life Cycles: ≥ 10,000 operations.

Mechanical Specifications:

• Mounting Type: Snap-on installation on standard 35 mm DIN rail profiles.
• Terminal Lug Format: Safe box-style wire clamping with combination screws.
• Applicable Wire Gauge: Accommodates conductors from 1.5 mm² up to 25 mm².
• Protection Index: IP20 finger-safe terminal coverage.

Dimensions:

• Module Width: ≈ 72.00 mm (Standard 4-module width footprint).
• Overall Height: ≈ 80.00 mm.
• Total Profile Depth: ≈ 75.00 mm.
• Unit Weight: ≈ 340.00 g.

Pinout and Wiring:

• Top Terminals (Line/Input): Accept incoming 3-phase live lines (L1, L2, L3) and the neutral line (N) from the main power feed.
• Bottom Terminals (Load/Output): Deliver protected multi-phase power straight downstream to the connected application or sub-panel network.

Datasheet Reference: Download Datasheet

• DZ74-63 4P 10A Miniature Circuit Breaker Mechanical Outline, Clearance Requirements, and Tripping Characteristics

Commonly Used in:

• Three-Phase Distribution Panels: Working as local isolators or overcurrent safety nodes inside main distribution boxes.
• Industrial Motor Control Centers: Protecting low-power 3-phase pump motors, heavy ventilation blowers, and conveyor belt controllers.
• Commercial Building HVAC: Safeguarding multi-phase central air conditioning compressors, industrial heaters, and elevator machinery.

Applications:

• Multi-Phase Overcurrent Fault Disconnection: Supplying reliable safety isolation across all lines to prevent wiring insulation fire hazards. However, clamping loose or poorly stripped multi-strand wires into the terminal ports can induce significant contact resistance and localized overheating; therefore, field technicians must tighten terminals to specified torque values and utilize bootlace ferrules for high-strand cores.

Equivalent Models:

• DZ74-63 4P 16A Circuit Breaker: An identical physical layout offering a larger 16A continuous current ceiling for heavier machinery.
• DZ74-63 3P 10A Circuit Breaker: A 3-pole variant tailored specifically for isolated three-phase delta systems that do not require a neutral wire connection.

Package Includes:

• 1 × DZ74-63 Series 4P 10A Mini Circuit Breaker Switch