NNX3B120 | Siemens Circuit Breaker 1200A 3-Pole 480V VL Series

Siemens · Circuit Breakers & Protection

Description  The Siemens NNX3B120 is a molded case circuit breaker from the VL Series, rated at 1200 amps and 480 volts. It features a thermal-magnetic LI trip unit, a 35 kA interrupt rating, and a 3-pole bolted-on design for heavy-duty low-voltage protection.     Technical Specifications  Condition New/Never Used Surplus Brand Siemens Category Circuit Breakers Part Number NNX3B120 Subcategory Molded Case Series VL Series Frame NG Frame Voltage Rating 480 VAC Frequency Rating 50/60 Hz Amperage Rating 1200 A Poles 3 Phase 3 Interrupting Rating 35 kA @ 480V Trip Type LI / Thermal Magnetic Mounting Type Bolted-On Temperature Rating 40 °C Global Standards UL, CSA, NOM, IEC, CE, CCC Communication PROFIBUS DP / MODBUS RTU (with trip unit) Dimensions (H x W x D) 16 in x 9 in x 6.2 in Application Low voltage distribution systems Weight 35 lbs (approx.)   Information About NNX3B120 The NNX3B120 is part of the Siemens VL Series, a globally recognized family of molded case circuit breakers designed for flexibility and reliability in low-voltage systems. Built on the NG frame, it supports three-phase, 1200A operation with a 35kA interrupt capacity at 480V. Its LI thermal-magnetic trip unit provides dependable long-time and instantaneous protection, ensuring safe operation under overload and fault conditions. Compact dimensions and bolted-on mounting simplify installation, while adherence to major global standards allows use in diverse industrial and commercial applications. Key Features: High Current Rating: 1200A continuous duty supports large-scale power distribution systems. Voltage Capacity: Operates at 480 VAC with three-phase compatibility for industrial use. Interrupting Rating: 35kA at 480V provides strong fault-clearing performance. Trip Type: LI thermal-magnetic unit offers long-time overload and instantaneous short-circuit protection. Modular VL Series Design: Compact footprint saves space and reduces overall system requirements. Global Standards Compliance: UL, CSA, NOM, IEC, CE, and CCC certifications for international applications. Communication Ready: PROFIBUS DP and MODBUS RTU options available with electronic trip units. Mounting: Bolted-on connection ensures secure installation in demanding environments. Durability: Tested to twice UL endurance requirements for high reliability. Dimensions: Measures 16 x 9 x 6.2 inches for efficient panel integration. The NNX3B120 delivers the reliability and precision required for global low-voltage power distribution, combining high capacity, robust construction, and flexible system compatibility.

Brand: Siemens · Category: Circuit Breakers & Protection

Key features

• High Current Rating: 1200A continuous duty supports large-scale power distribution systems.
• Voltage Capacity: Operates at 480 VAC with three-phase compatibility for industrial use.
• Interrupting Rating: 35kA at 480V provides strong fault-clearing performance.
• Trip Type: LI thermal-magnetic unit offers long-time overload and instantaneous short-circuit protection.
• Modular VL Series Design: Compact footprint saves space and reduces overall system requirements.
• Global Standards Compliance: UL, CSA, NOM, IEC, CE, and CCC certifications for international applications.
• Communication Ready: PROFIBUS DP and MODBUS RTU options available with electronic trip units.
• Mounting: Bolted-on connection ensures secure installation in demanding environments.
• Durability: Tested to twice UL endurance requirements for high reliability.
• Dimensions: Measures 16 x 9 x 6.2 inches for efficient panel integration.

Specifications

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