Allen Bradley 20P21AF1K5RA0NNN 1P 1.5A C-curve Miniature Circuit Breaker

Nov. 17 , 2025

1. Product Name

Allen Bradley 20P21AF1K5RA0NNN 1P C-Curve Miniature Circuit Breaker (MCB)

2. Product Introduction

The Allen Bradley 20P21AF1K5RA0NNN is a 1-pole (1P) C-curve Miniature Circuit Breaker rated at 1.5A, delivering thermal-magnetic protection for low-current commercial and industrial circuits.

3. Product Description

The Allen Bradley 20P21AF1K5RA0NNN is a high-reliability Miniature Circuit Breaker, part of Allen Bradley’s robust 20P series engineered for precise low-current circuit protection. As a premium Allen Bradley Miniature Circuit Breaker, it acts as a critical safeguard for lighting systems, control circuits, and sensitive electronic equipment—shielding against overloads, short circuits, and electrical faults in commercial buildings and industrial facilities.

Crafted with flame-retardant UL94 V0 thermoplastic housing and high-precision internal components, this Allen Bradley Miniature Circuit Breaker offers exceptional durability in diverse operating environments. It withstands temperatures ranging from -25°C to 70°C, resists vibration and chemical exposure, and maintains performance in dusty or humid conditions—ideal for manufacturing plants, agricultural processing facilities, and commercial complexes. Its core thermal-magnetic tripping mechanism features a C-curve (5–10x rated current) response, optimized for general-purpose loads: the thermal element provides inverse-time overload protection to handle sustained excess current, while the magnetic element delivers instantaneous tripping for rapid short-circuit mitigation—suitable for resistive and light inductive loads with moderate inrush currents.

With a 1P configuration and 1.5A rated current, the 20P21AF1K5RA0NNN is designed for low-current single-phase circuits, such as office lighting, control panel auxiliary circuits, sensor networks, and small electronic devices in industrial settings. It supports a maximum voltage rating of 240V AC (single-phase) / 415V AC (three-phase), compatible with standard commercial and industrial power systems, and features a compact design (18mm width) that fits standard 35mm DIN rail mounting—enabling space-efficient integration into control cabinets and distribution boards.

This Allen Bradley Miniature Circuit Breaker complies with global safety standards including UL 489, IEC 60898-1, and CE, ensuring compliance in international markets. It boasts a 6kA breaking capacity at 240V AC, providing reliable protection even in high-fault-current scenarios. The breaker includes a manual reset lever with clear on/off visual indicators, allowing operators to quickly identify circuit status and restore power post-tripping. It also integrates advanced arc-quenching technology to suppress electrical arcing during tripping, reducing fire risks and extending component lifespan.

Designed to integrate seamlessly with Allen Bradley’s automation ecosystem, the 20P21AF1K5RA0NNN works in harmony with ControlLogix PLCs, PanelView HMIs, and PowerFlex VFDs—forming a comprehensive control and protection system. It supports selective coordination with other protective devices, ensuring only the faulty circuit is isolated to minimize operational downtime. The breaker’s low power dissipation and high mechanical endurance (10,000 on/off cycles) enhance long-term reliability and cost-effectiveness, making it a preferred choice for low-current commercial and industrial applications.

4. Product Model

20P21AF1K5RA0NNN
20P21AF452RA0NNN
20P21AF565RA0NNN
20P21AF678RA0NNN
20P21AF791RA0NNN
20P21AF904RA0NNN
20P41AB012RA0NNN
20P41AB020RA0NNN
20P41AB029RA0NNN
20P41AB038RA0NNN
20P41AB055RA0NNN
20P41AB073RA0NNN
20P41AB093RA0NNN
20P41AB110RA0NNN
20P41AB146RA0NNN
20P41AB180RA0NNN
20P41AB1K0RA0NNN
20P41AB218RA0NNN
20P41AB265RA0NNN
20P41AB360RA0NNN
20P41AB434RA0NNN
20P41AB521RA0NNN
20P41AB700RA0NNN
20P41AB7P0RA0NNN
20P41AB875RA0NNN
20P41AB9P0RA0NNN
20P41AD010RA0NNN
20P41AD014RA0NNN
20P41AD019RA0NNN
20P41AD027RA0NNN
20P41AD035RA0NNN
20P41AD045RA0NNN
20P41AD052RA0NNN
20P41AD073RA0NNN
20P41AD086RA0NNN
20P41AD100RA0NNN
20P41AD129RA0NNN
20P41AD167RA0NNN
20P41AD1K1RA0NNN
20P41AD1K3RA0NNN
20P41AD1K4RA0NNN
20P41AD207RA0NNN
20P41AD250RA0NNN
20P41AD330RA0NNN
20P41AD412RA0NNN
20P41AD495RA0NNN
20P41AD4P1RA0NNN
20P41AD667RA0NNN
20P41AD6P0RA0NNN
20P41AD830RA0NNN
20P41AD996RA0NNN
20P41AE067RA0NNN
20P41AE101RA0NNN
20P41AE135RA0NNN
20P41AE1K0RA0NNN
20P41AE1K2RA0NNN
20P41AE1K3RA0NNN
20P41AE1K6RA0NNN
20P41AE270RA0NNN
20P41AE405RA0NNN
20P41AE540RA0NNN
20P41AE675RA0NNN
20P41AE810RA0NNN
20P41AF1K0RA0NNN
20P41AF1K1RA0NNN
20P41AF1K2RA0NNN
20P41AF1K4RA0NNN
20P41AF1K5RA0NNN
20P41AF452RA0NNN
20P41AF565RA0NNN
20P41AF678RA0NNN
20P41AF791RA0NNN
20P41AF904RA0NNN
20P-S551LRA
20P-S5V62
20SD1K0NEM
20SD1K0NEN
20SD1K0NES
20SD400NEN
20SD600NEN
20SF1K0NEM
20SF1K0NEN
20SF1K0NES
20S-RFC
20-XCOMM-AC-PS1
20-XCOMM-DC-BASE
2100-B1015G
2100-B2015
2100-B3050
2100-FILLER
2100H-82500
2100H-DNRC1
2100H-N18A
2100H-NP1
2100H-NRB1
2100H-NRB2
2100H-UJ1
2100R-BGSK1
2100R-BGSK1T40
2100R-BPS1200
2100R-BPS600
2100R-BPS800
2100R-CS0
2100R-CTB
2100R-CTF7A
2100R-CTH7A
2100R-CTJ8R
2100R-CTL8R
2100R-DL6CP
2100R-FB1CC
2100R-FB1NC
2100R-FB1NC2CC
2100R-FB2CC
2100R-FB3CC
2100R-FBB2060JDA
2100R-FBC2060JCB
2100R-FBC4060JEB
2100R-FCA10HJR
2100R-FCA20HJR
2100R-FCA360625
2100R-FCA40HJR
2100R-FCA660
2100R-GSK1
2100R-GSK1U
2100R-GSK2
2100R-H15C15SK93
2100R-H15C1S13
2100R-H15C1S13B
2100R-H15C1SD93
2100R-H15C1SD93F
2100R-H15C1SKD93
2100R-H15CFM
2100R-H15CK93
2100R-H15CS
2100R-H20DSW
2100R-H2LH0313
2100R-H2RH0313
2100R-H310WDLH
2100R-H310WDRH
2100R-H36DFM
2100R-H36DK92F
2100R-H36DS
2100R-H36DSB
2100R-HOA250

5. Product Advantages

C-Curve Protection: 5–10x rated current tripping for optimal safeguarding of general-purpose resistive/light inductive loads.

Low-Current Precision: 1.5A rating ideal for sensitive low-current circuits like lighting and control systems.

Global Compliance: UL/IEC/CE certified for seamless deployment in international commercial/industrial markets.

Space-Efficient Design: 18mm narrow width fits tight control cabinets and distribution boards.

DIN Rail Compatibility: Standard 35mm DIN rail mounting enables quick, tool-free installation.

Ecosystem Synergy: Integrates with Allen Bradley PLCs, HMIs, and VFDs for integrated automation systems.

User-Friendly Operation: Clear visual indicators and manual reset simplify monitoring and maintenance.

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, manufacturing, and logistics sectors. Adding the Allen Bradley 20P21AF1K5RA0NNN strengthens its circuit protection portfolio, complementing existing offerings (HMIs, sensors) to deliver tailored low-current protection solutions—critical for clients with sensitive control circuits and lighting systems.

As a one-stop automation supplier, the company caters to clients needing end-to-end circuit protection for diverse applications: agricultural processing plants require reliable low-current protection for sensor networks and control panels, while manufacturing facilities need compact breakers for tight control cabinets. The 20P21AF1K5RA0NNN’s C-curve design and 1.5A rating address core client pain points—protecting sensitive equipment from overloads and short circuits without unnecessary tripping. By offering genuine Allen Bradley Miniature Circuit Breakers, www.wheat-auto.com reinforces its position as a comprehensive supplier, allowing clients to source control, sensing, and protection components from a single trusted partner—enhancing operational safety and efficiency across target sectors.

7. Application Scenarios

Agricultural Processing Plants: Protects low-current sensor networks for grain moisture monitoring, control panel auxiliary circuits, and small lighting systems in processing halls.

Manufacturing Facilities: Safeguards robotic cell control circuits, PLC I/O modules, and sensitive electronic instrumentation in assembly lines.

Commercial Buildings: Shields office lighting systems, HVAC control circuits, and small power outlets in retail stores and corporate offices.

Logistics Hubs: Protects AS/RS (Automated Storage and Retrieval System) sensor networks, conveyor control auxiliary circuits, and warehouse lighting.

Food & Beverage Plants: Guards small pump control circuits, packaging machine sensors, and sanitization system auxiliary power.

Industrial Control Panels: Integrates into distribution boards to protect relay circuits, HMI power supplies, and low-current signal lines from electrical faults.

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