Allen Bradley 20GEF3E545LNANNNNN Miniature Circuit Breaker for Industrial Electrical Protection

Nov. 17 , 2025

1. Product Name

Allen Bradley 20GEF3E545LNANNNNN Miniature Circuit Breaker (MCB)

2. Product Introduction

The Allen Bradley 20GEF3E545LNANNNNN is a high-performance Miniature Circuit Breaker, designed to safeguard industrial electrical systems from overloads and short circuits with precise protection capabilities.

3. Product Description

The Allen Bradley 20GEF3E545LNANNNNN is a premium Miniature Circuit Breaker from Allen Bradley’s acclaimed 20GE series, engineered to deliver robust electrical protection for mid-to-high power industrial applications. As a critical component of industrial safety infrastructure, this Allen Bradley Miniature Circuit Breaker integrates advanced thermal-magnetic tripping technology with durable construction, ensuring consistent performance in demanding operational environments.

Crafted with glass-fiber-reinforced polyester housing and silver-nickel alloy contacts, the Allen Bradley Miniature Circuit Breaker offers exceptional resistance to heat, impact, and electrical arcing. Its dual tripping mechanism provides comprehensive protection: the thermal element responds to prolonged overloads (e.g., motor startup surges) by gradually tripping, while the magnetic element instantly interrupts short circuits with a breaking capacity of up to 22kA—preventing equipment damage, downtime, and fire risks.

Rated for 545A current and 600V AC 3-phase operation, this Allen Bradley Miniature Circuit Breaker is optimized for protecting mid-to-large industrial equipment, including medium-sized motors, industrial heating systems, automation control panels, and secondary power distribution lines. It complies with global safety standards such as UL 489, IEC 60898, and CE, ensuring seamless integration into international electrical systems. The compact design (7.6×10.2×20.8cm) enables space-efficient installation in distribution boards and control cabinets, while the ergonomic toggle switch features clear ON/OFF/tripped status indicators for intuitive operation.

A key strength of this Allen Bradley Miniature Circuit Breaker is its compatibility with Allen Bradley’s broader automation ecosystem, including PowerFlex VFDs, CompactLogix PLCs, and safety relays, forming a unified protection network. It features bolted terminal connections for secure high-current contact and tool-less mounting, simplifying installation and maintenance. The breaker operates reliably in temperatures ranging from -25°C to 70°C and holds an IP20 rating, shielding internal components from dust and debris in industrial settings.

Equipped with a lockable toggle switch and auxiliary contact compatibility, the Allen Bradley Miniature Circuit Breaker enhances operational safety by preventing unauthorized resets and enabling remote monitoring of circuit status. It supports selective coordination with other protective devices, ensuring only the faulty circuit is isolated to minimize operational disruption. The “F3E” configuration denotes its tripping curve and accessory compatibility, making it suitable for applications requiring balanced protection for motor and resistive loads.

4. Product Model

20GEF3E545LNANNNNN
20GEF3E545LNDNNNNN
20GEF3E545LNDNNNNN-C0
20GEF3E545LNDNNNNN-C0-P15
20GEF3E545LNDNNNNN-C0-P17
20GEF3E545MNDNNNNN-C0-P15-P50
20GEF3E595LNDNNNNN
20GEF3E595LNDNNNNN-C0-P50
20GEF3E595MNDNNNNN-C0-P50
20GEF3E690MNANNNNN
20GEF3E760MNDNNNNN
20GEF3E980JNANNNNN
20GEF3E980JNDNNNNN
20GEF3E980KNANNNNN
20GEF3E980KNDNNNNN
20GEF3E980LNANNNNN
20GEF3E980LNANNNNN-C0
20GEF3E980LNDNNNNN
20GEF3E980LNDNNNNN-C0
20GEF3E980LNDNNNNN-C0-P17
20GEF3E980MNANNNNN
20GEF3E980MNANNNNN-C0
20GEF3E980MNDNNNNN
20GEF3F1K0LNANNNNN
20GEF3F1K0LNDNNNNN
20GEF3F1K0MNANNNNN
20GEF3F1K0MNANNNNN-C0
20GEF3F1K1LNANNNNN
20GEF3F1K1LNANNNNN-C0
20GEF3F1K1LNDNNNNN
20GEF3F1K1MNANNNNN
20GEF3F1K1MNDNNNNN
20GEF3F1K1MNDNNNNN-C0-P51
20GEF3F1K4KNDNNNNN
20GEF3F1K4KNDNNNNN-C0
20GEF3F1K4LNANNNNN
20GEF3F1K4LNANNNNN-C0
20GEF3F1K4LNDNNNNN
20GEF3F1K4LNDNNNNN-P15-P16-P50
20GEF3F1K4MNDNNNNN-C0
20GEF3F1K4MNDNNNNN-P50
20GEF3F1K8LNANNNNN
20GEF3F1K8LNANNNNN-C0
20GEF3F1K8LNANNNNN-P15-P16
20GEF3F1K8LNDNNNNN
20GEF3F1K8LNDNNNNN-P15-P16-P50
20GEF3F1K8MNANNNNN-P50
20GEF3F1K8MNDNNNNN
20GEF3F1K8MNDNNNNN-C0
20GEF3F1K8MNDNNNNN-C0-P15-P16
20GEF3F1K8MNDNNNNN-P50
20GEF3F215LNANNNNN
20GEF3F215LNDNNNNN
20GEF3F215MNDNNNNN
20GEF3F265LNANNNNN
20GEF3F265LNDNNNNN
20GEF3F265MNDNNNNN
20GEF3F2K3LNANNNNN
20GEF3F2K3LNDNNNNN
20GEF3F2K3LNDNNNNN-C0
20GEF3F2K3MNDNNNNN
20GEF3F2K3MNDNNNNN-C0
20GEF3F2K3MNDNNNNN-C0-P15-P16
20GEF3F2K3MNDNNNNN-C0-P51
20GEF3F2K3MNDNNNNN-P15-P16-P51
20GEF3F2K7KNDNNNNN-P15-P16-P50
20GEF3F2K7LNANNNNN-P15-P16
20GEF3F2K7LNANNNNN-P60
20GEF3F2K7LNDNNNNN-C0-P15-P16
20GEF3F2K7LNDNNNNN-C0-P60
20GEF3F2K7LNDNNNNN-P15-P16
20GEF3F2K7LNDNNNNN-P60
20GEF3F2K7MNDNNNNN-C0
20GEF3F2K7MNDNNNNN-C0-P15-P16
20GEF3F2K7MNDNNNNN-C0-P60
20GEF3F2K7MNDNNNNN-P15-P16
20GEF3F2K7MNDNNNNN-P60
20GEF3F330LNANNNNN
20GEF3F330LNDNNNNN
20GEF3F330MNDNNNNN
20GEF3F370LNANNNNN
20GEF3F370LNDNNNNN
20GEF3F370MNDNNNNN
20GEF3F3K6JNANNNNN-P60
20GEF3F3K6KNDNNNNN-C0-P60
20GEF3F3K6LNANNNNN-C0-P60
20GEF3F3K6LNDNNNNN-C0-P15-P16
20GEF3F3K6LNDNNNNN-C0-P15-P16-
20GEF3F3K6LNDNNNNN-C0-P50-P60
20GEF3F3K6MNDNNNNN
20GEF3F3K6MNDNNNNN-C0-P50-P60
20GEF3F3K6MNDNNNNN-P15-P16
20GEF3F3K6MNDNNNNN-P50-P60
20GEF3F415LNANNNNN
20GEF3F415LNDNNNNN
20GEF3F415LNDNNNNN-C0
20GEF3F415MNANNNNN
20GEF3F415MNANNNNN-C0-P50
20GEF3F415MNDNNNNN
20GEF3F415MNDNNNNN-C0
20GEF3F4K5KNDNNNNN-C0-P60
20GEF3F4K5LNANNNNN-C0-P60
20GEF3F4K5LNDNNNNN-P15
20GEF3F4K5LNDNNNNN-P16
20GEF3F505KNDNNNNN-C0-P50
20GEF3F505LNANNNNN
20GEF3F505LNDNNNNN
20GEF3F505MNANNNNN
20GEF3F505MNDNNNNN
20GEF3F505MNDNNNNN-P15-P17-P51
20GEF3F565KNANNNNN
20GEF3F565KNDNNNNN-C0-P50
20GEF3F565LNANNNNN
20GEF3F565LNDNNNNN
20GEF3F565LNDNNNNN-C0
20GEF3F565MNANNNNN
20GEF3F650LNANNNNN
20GEF3F650LNDNNNNN
20GEF3F650LNDNNNNN-C0
20GEF3F650MNANNNNN
20GEF3F650MNANNNNN-C0-P50
20GEF3F650MNDNNNNN
20GEF3F650MNDNNNNN-C0
20GEF3F735LNANNNNN
20GEF3F735LNDNNNNN
20GEF3F735MNDNNNNN
20GEF3F820LNANNNNN
20GEF3F820LNANNNNN-P50
20GEF3F820LNDNNNNN
20GEF3F820LNDNNNNN-C0
20GEF3F920LNANNNNN
20GEF3F920LNDNNNNN
20GEF3F920LNDNNNNN-C0
20GEF3F920MNDNNNNN
20GEF3F920MNDNNNNN-C0-P51
20GEF4C1K0LNANNNNN
20GEF4C1K0LNANNNNN-P15-P17
20GEF4C1K0LNANNNNN-P50
20GEF4C1K0LNDNNNNN
20GEF4C1K0LNDNNNNN-C0
20GEF4C1K0LNDNNNNN-P15-P17

5. Product Advantages

Precise 545A Protection: Ideal for mid-to-high power industrial equipment and secondary distribution lines.

Dual Tripping Mechanism: Thermal overload and magnetic short-circuit protection for comprehensive safety.

Ecosystem Integration: Seamlessly works with Allen Bradley automation components for unified system protection.

Durable Construction: Glass-fiber-reinforced housing and alloy contacts ensure long-term reliability in harsh environments.

Enhanced Safety Features: Lockable toggle and auxiliary contact support for secure, monitorable operation.

Global Compliance: UL, IEC, CE certified for worldwide deployment in industrial applications.

6. Business Insight on www.wheat-auto.com

www.wheat-auto.com (Changzhou Wheat Automation Technology Co., Ltd.) specializes in industrial automation components distribution and precision sensor manufacturing, focusing on agricultural processing, mid-to-large-scale manufacturing, and logistics sectors. Adding the Allen Bradley 20GEF3E545LNANNNNN to its portfolio expands its mid-to-high current electrical protection offerings, complementing its existing range of low-current breakers, VFDs, and sensors.

As a one-stop automation supplier, the company caters to clients needing reliable protection for diverse electrical systems—from delicate control circuits to mid-power machinery. The 545A rating of this Allen Bradley Miniature Circuit Breaker fills a critical gap, addressing the needs of clients operating medium-sized motors, industrial heaters, and secondary distribution lines in agricultural processing plants and manufacturing facilities. By offering genuine Allen Bradley Miniature Circuit Breakers across current spectrums, www.wheat-auto.com strengthens its reputation as a comprehensive supplier, leveraging Allen Bradley’s brand trust to serve industries requiring robust, certified electrical protection. This addition aligns with its mission to provide end-to-end automation solutions, ensuring clients can source all critical components from a single, reliable partner.

7. Application Scenarios

Agricultural Processing Plants: Safeguards medium-sized motors in grain conveyors, wheat processing machinery, and irrigation systems.

Manufacturing Facilities: Protects secondary power distribution lines and industrial heating equipment on assembly lines.

Food & Beverage Industry: Shields electrical circuits for packaging machinery, pasteurizers, and large refrigeration units.

Logistics Warehouses: Secures mid-power circuits for conveyor networks and automated sorting systems.

Commercial Buildings: Protects main electrical distribution lines in large office complexes and industrial parks.

Water Treatment Plants: Safeguards medium-sized pump motors and aeration systems in treatment facilities.

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