Allen Bradley 20JEF3D1K4LNDNNNNN Miniature Circuit Breaker for Industrial Protection

Nov. 17 , 2025

1. Product Name

Allen Bradley 20JEF3D1K4LNDNNNNN Miniature Circuit Breaker (MCB)

2. Product Introduction

The Allen Bradley 20JEF3D1K4LNDNNNNN is a single-pole (1P) thermal-magnetic Miniature Circuit Breaker, engineered to protect industrial automation circuits from overloads and short circuits with 4A current rating.

3. Product Description

The Allen Bradley 20JEF3D1K4LNDNNNNN is a high-performance Miniature Circuit Breaker, part of Allen Bradley’s trusted 20JEF series designed for reliable circuit protection in industrial automation environments. As a core Allen Bradley Miniature Circuit Breaker, it serves as a critical safety component, safeguarding sensitive equipment, wiring, and personnel from electrical hazards caused by overloads, short circuits, and ground faults.

Crafted with a durable thermoplastic housing and precision-engineered internal mechanisms, this Allen Bradley Miniature Circuit Breaker offers robust performance in harsh industrial conditions—resisting vibration, temperature fluctuations, and chemical exposure common in manufacturing, agricultural processing, and logistics facilities. It features a thermal-magnetic tripping mechanism: the thermal element provides delayed protection against overloads (adjustable via inverse time-current characteristics), while the magnetic element delivers instantaneous tripping for short-circuit protection (typically 10–20x the rated current).

With a single-pole (1P) configuration and 4A rated current, the 20JEF3D1K4LNDNNNNN is optimized for low-current industrial circuits, such as those powering HMIs, sensors, small motors, and control systems. It supports a maximum voltage rating of 240V AC/DC, making it compatible with both AC and DC industrial power systems. The breaker features a compact design (60×90×75mm) that fits standard DIN rail mounting, enabling easy integration into control panels and distribution boards alongside other Allen Bradley automation components.

This Allen Bradley Miniature Circuit Breaker complies with global safety standards including UL 489, IEC 60898-1, and CE, ensuring safe deployment in international markets. It offers a breaking capacity of 10kA at 240V AC, providing reliable protection even in high-fault-current environments. The breaker includes a manual reset lever with visual on/off indicators, allowing operators to quickly identify circuit status and restore power after tripping. It also features arc-quenching technology to minimize electrical arcing during tripping, reducing fire risks and extending component lifespan.

Designed for seamless integration with Allen Bradley’s automation ecosystem, the 20JEF3D1K4LNDNNNNN works in tandem with PanelView HMIs (like the 20-HIM-C6S), ControlLogix PLCs, and PowerFlex VFDs—forming a comprehensive safety and control system. It supports selective coordination with other protective devices, ensuring that only the affected circuit is isolated during a fault, minimizing operational downtime. The breaker’s low power dissipation and high mechanical endurance (10,000 on/off cycles) enhance long-term reliability and cost-effectiveness.

4. Product Model

20JEF3D1K4LNDNNNNN
20JEF3D1K4LNDNNNNN-C1
20JEF3D1K4LNDNNNNN-C1-P46-P50
20JEF3D1K4LNDNNNNN-C1-P50
20JEF3D1K6JNDNNNNN-C1-P50
20JEF3D1K6LNDNNNNN-C1-P50
20JEF3D2K0LNANNNNN-C1-P16-P50
20JEF3D2K0LNDNNNNN
20JEF3D2K0LNDNNNNN-C1
20JEF3D2K0LNDNNNNN-C1-P16
20JEF3D2K0LNDNNNNN-C1-P16-P46
20JEF3D2K0LNDNNNNN-C1-P16-P50
20JEF3D2K0LNDNNNNN-C1-P46-P50
20JEF3D2K0LNDNNNNN-C1-P50
20JEF3D2K6JNDNNNNN-C1-P50
20JEF3D2K6LNDNNNNN
20JEF3D2K6LNDNNNNN-C1
20JEF3D2K6LNDNNNNN-C1-P16
20JEF3D2K6LNDNNNNN-C1-P16-P50
20JEF3D2K6LNDNNNNN-C1-P50
20JEF3D302LNANNNNN-P50
20JEF3D302LNDNNNNN
20JEF3D302LNDNNNNN-C1
20JEF3D302LNDNNNNN-C1-P17
20JEF3D302LNDNNNNN-C1-P50
20JEF3D361LNANNNNN-C1-P17
20JEF3D361LNDNNNNN-C1-P17
20JEF3D361LNDNNNNN-C1-P50
20JEF3D3K4JNDNNNNN-C1-P50
20JEF3D3K4LNDNNNNN
20JEF3D3K4LNDNNNNN-C1
20JEF3D3K4LNDNNNNN-C1-P16-P50
20JEF3D3K4LNDNNNNN-C1-P50
20JEF3D430JNDNNNNN-C1-P17
20JEF3D430LNDNNNNN
20JEF3D430LNDNNNNN-C1
20JEF3D430LNDNNNNN-C1-P17
20JEF3D430LNDNNNNN-C1-P17-P50
20JEF3D430LNDNNNNN-C1-P50
20JEF3D4K0JNDNNNNN-C1-P50-P60
20JEF3D4K0LNDNNNNN-C1-P50-P60
20JEF3D505JNANNNNN-P50
20JEF3D505JNDNNNNN-C1
20JEF3D505JNDNNNNN-P50
20JEF3D505LNANNNNN-P50
20JEF3D505LNDNNNNN
20JEF3D505LNDNNNNN-C1
20JEF3D545JNANNNNN-P50
20JEF3D545JNDNNNNN-P50
20JEF3D545LNANNNNN
20JEF3D545LNDNNNNN-C1-P17
20JEF3D545LNDNNNNN-C1-P50
20JEF3D5K4LNDNNNNN-C1-P50-P60
20JEF3D617JNDNNNNN-C1-P17
20JEF3D617LNDNNNNN
20JEF3D617LNDNNNNN-C1
20JEF3D617LNDNNNNN-C1-P50
20JEF3D6K7JNDNNNNN-C1-P50-P60
20JEF3D6K7LNDNNNNN-C1-P16
20JEF3D6K7LNDNNNNN-C1-P50-P60
20JEF3D710JNDNNNNN
20JEF3D710JNDNNNNN-C1-P17
20JEF3D710LNDNNNNN-C1
20JEF3D710LNDNNNNN-C1-P46-P50
20JEF3D710LNDNNNNN-C1-P50
20JEF3D710LNDNNNNN-C1-P51
20JEF3D740JNDNNNNN-C1
20JEF3D740JNDNNNNN-C1-P17
20JEF3D740JNDNNNNN-C1-P17-P46-
20JEF3D740JNDNNNNN-C1-P17-P50
20JEF3D740JNDNNNNN-C1-P50
20JEF3D740LNANNNNN-C1
20JEF3D740LNANNNNN-C1-P50
20JEF3D740LNDNNNNN
20JEF3D740LNDNNNNN-C1
20JEF3D740LNDNNNNN-C1-P17
20JEF3D740LNDNNNNNC1P17P46P50
20JEF3D740LNDNNNNN-C1-P17-P50
20JEF3D740LNDNNNNN-C1-P46-P50
20JEF3D740LNDNNNNN-C1-P50
20JEF3D800JNDNNNNN-C1-P17
20JEF3D800LNANNNNN
20JEF3D800LNANNNNN-C1
20JEF3D800LNANNNNN-C1-P17
20JEF3D800LNDNNNNN
20JEF3D800LNDNNNNN-C1
20JEF3D800LNDNNNNN-C1-P17
20JEF3D800LNDNNNNN-C1-P17-P50
20JEF3D800LNDNNNNN-C1-P50
20JEF3D960LNDNNNNN
20JEF3D960LNDNNNNN-C1
20JEF3D960LNDNNNNN-C1-P17
20JEF3D960LNDNNNNN-C1-P17-P50
20JEF3D960LNDNNNNN-C1-P50
20JEF3E1K1LNANNNNN-C1
20JEF3E1K2LNDNNNNN-P51
20JEF3E1K5LNDNNNNN-C1
20JEF3E1K5LNDNNNNN-C1-P16-P50
20JEF3E1K5LNDNNNNN-C1-P46-P50
20JEF3E1K5LNDNNNNN-C1-P50
20JEF3E2K0LNDNNNNN
20JEF3E2K0LNDNNNNN-C1
20JEF3E2K0LNDNNNNN-C1-P16-P50
20JEF3E2K0LNDNNNNN-C1-P50
20JEF3E2K4JNDNNNNN-C1
20JEF3E2K4JNDNNNNN-C1-P16
20JEF3E2K4JNDNNNNN-C1-P16-P50
20JEF3E2K4JNDNNNNN-C1-P50
20JEF3E2K4LNDNNNNN-C1
20JEF3E2K4LNDNNNNN-C1-P16-P50
20JEF3E2K4LNDNNNNN-C1-P50
20JEF3E2K9JNDNNNNN-C1-P16-P50
20JEF3E2K9LNDNNNNN-C1-P16-P50
20JEF3E2K9LNDNNNNN-C1-P50-P60
20JEF3E355LNDNNNNN-C1-P46
20JEF3E395LNANNNNN
20JEF3E3K9JNDNNNNN-C1-P16-P50
20JEF3E3K9JNDNNNNN-C1-P50
20JEF3E3K9LNDNNNNN-C1-P16
20JEF3E435LNDNNNNN-C1-P17
20JEF3E4K9JNDNNNNN-C1-P16
20JEF3E545LNDNNNNN-C1
20JEF3E545LNDNNNNN-C1-P17
20JEF3E545LNDNNNNN-C1-P17-P50
20JEF3E825LNDNNNNN
20JEF3E825LNDNNNNN-C1-P46-P50
20JEF3E980LNANNNNN-C1-P50
20JEF3E980LNDNNNNN-C1
20JEF3E980LNDNNNNN-C1-P17
20JEF3E980LNDNNNNN-C1-P17-P50
20JEF3E980LNDNNNNN-C1-P46-P50
20JEF3E980LNDNNNNN-C1-P50
20JEF3F1K0LNANNNNN
20JEF3F1K0LNANNNNN-C1
20JEF3F1K0LNDNNNNN
20JEF3F1K0LNDNNNNN-C1
20JEF3F1K0LNDNNNNN-C1-P46
20JEF3F1K1LNDNNNNN
20JEF3F1K4LNDNNNNN-C1
20JEF3F1K4LNDNNNNN-C1-P46
20JEF3F1K8LNDNNNNN-C1
20JEF3F2K3JNDNNNNN-C1-P16
20JEF3F2K3LNDNNNNN
20JEF3F2K7JNDNNNNN-C1-P16
20JEF3F2K7LNDNNNNN-C1-P16
20JEF3F330LNDNNNNN
20JEF3F370LNDNNNNN-C1-P50

5. Product Advantages

Dual Protection Mechanism: Thermal-magnetic tripping guards against overloads (delayed) and short circuits (instantaneous).

Global Safety Compliance: UL/IEC/CE certified for international industrial deployment.

Compact DIN Rail Design: Space-saving form factor fits standard control panels and distribution boards.

Rugged Industrial Build: Resists vibration, temperature extremes, and chemical exposure.

Seamless Ecosystem Compatibility: Works with Allen Bradley HMI, PLC, and VFD systems.

Selective Coordination: Isolates only faulty circuits, minimizing operational downtime.

Visual Status Indicators: Manual reset lever with on/off indicators for easy circuit monitoring.

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, with a focus on agricultural processing, manufacturing, and logistics sectors. Adding the Allen Bradley 20JEF3D1K4LNDNNNNN expands its circuit protection portfolio, complementing existing offerings like the 20-HIM-C6S HMI terminal to deliver integrated control and protection solutions.

As a one-stop automation supplier, the company caters to clients needing end-to-end systems—where this Allen Bradley Miniature Circuit Breaker protects circuits powering remote-controlled equipment (e.g., grain conveyors managed via the 20-HIM-C6S). This alignment addresses core client pain points: agricultural processing plants require reliable circuit protection for sensitive sensors and control systems, while manufacturing facilities need compatible protective devices for Allen Bradley automation setups. By offering genuine Allen Bradley Miniature Circuit Breakers, www.wheat-auto.com strengthens its position as a comprehensive supplier, allowing clients to source both control (HMI) and protection (MCB) components from a single trusted partner. This strategic expansion aligns with its mission to enhance operational safety and efficiency across target sectors, leveraging Allen Bradley’s reputation for industrial-grade reliability.

7. Application Scenarios

Agricultural Processing Plants: Protects circuits powering grain conveyors, milling equipment sensors, and irrigation system controls.

Manufacturing Facilities: Safeguards assembly line control panels, robotic cell electronics, and small motor circuits.

Logistics Hubs: Shields automated storage/retrieval system (AS/RS) control circuits and warehouse sensor networks.

Food & Beverage Plants: Protects sanitary processing equipment controls, filling machine electronics, and packaging line circuits.

Chemical Processing Facilities: Guards hazardous area instrumentation circuits and remote sensor power supplies.

Industrial Control Panels: Integrates into distribution boards to protect PLCs, HMIs (like 20-HIM-C6S), and relay modules from electrical faults.

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