What is Eaton NZMN1-A32 Circuit Breaker?
Eaton NZMN1-A32 is a 3-pole, 32A molded case circuit breaker (MCCB) from the Eaton NZM Series. Built on the N1 frame with high breaking capacity, it features thermal-magnetic trip technology and is widely used for circuit protection and power isolation in industrial low-voltage AC distribution systems.
Unlike standard B-type circuit breakers, the NZMN1-A32 delivers superior short-circuit breaking performance, making it ideal for industrial environments with higher short-circuit current and stricter power reliability requirements.
It provides reliable overload and short-circuit protection, effectively safeguarding downstream cables and electrical equipment when circuit faults occur.
Cable Sizing Guide for NZMN1-A32
Most overheating and accidental tripping issues of the Eaton NZMN1-A32 32A circuit breaker are caused by incorrect wire selection and improper wiring. Below is the standard cable sizing solution for industrial and commercial low-voltage applications.
Recommended Copper Wire Size
● Standard short-distance wiring (0-20m): 4mm² copper cable
● Long-distance wiring or voltage-drop sensitive circuits: 6mm² copper cable
● Do not use 2.5mm² cable under full load, as it easily overheats, ages prematurely and causes false tripping
● Aluminum wires require one size larger cross-section
Inlet & Outlet Cable Standard
● Incoming line: 6mm² copper cable for sufficient current margin and stable operation
● Outgoing line for general loads: 4mm² copper cable
● Outgoing line for motors and fluctuating loads: 6mm² copper cable to withstand startup current surge
Eaton NZMN1-A32 Technical Specifications
● Model:Eaton NZMN1-A32
● Number of Poles: 3 Pole
● Rated Current: 32A
● Frame Size: NZM1
●Rated Operating Voltage: AC 415V / AC 690V
● Overload Current Adjustment Range: 25.6A ~ 32A (80%~100% of rated current)
● Rated Ultimate Short-Circuit Breaking Capacity (Icu): 25kA at AC 415V
● Protection Type: Overload & Short-circuit Protection
Model Parameter Breakdown
● NZM: Eaton's classic molded case circuit breaker series with industrial-grade quality, compliant with global low-voltage distribution standards.
● N: Standard breaking capacity type, balanced and stable performance for most regular industrial and commercial power distribution applications.
● 1: NZM1 compact frame, space-saving design for small distribution boxes and compact cabinets.
● A32: Rated operating current of 32A, designed for circuit protection of medium and low-power loads.
Ambient Temperature Derating Instructions
The Eaton NZMN1-A32 is rated 32A at 40℃ for standard ventilated installation.
Improve efficiency
● 40℃ (Standard)：Supports continuous full-load 32A operation with stable performance.
● 50℃ (Poor ventilation)：Derate load current to ≤28A to avoid overheating and false tripping.
● 60℃ (Enclosed/dense mounting)：Limit operating current to ≤25A for safe operation.
Aftersales Support
Quantity available: In stock.
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Warranty: 12 months.
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Lead time: Shipment within 3-5 working days.
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Terms of payment: T/T. RMB (CNY) support.
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Courier partners: FedEx, DHL, UPS, TNT, EMS, SF express.
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FAQ
Q1: What is the rated current of NZMN1-A32? Can the overload current be adjusted?
A1: This circuit breaker has a rated current of 32A. The overload protection current can be fine-tuned on-site within the range of 25.6A to 32A to meet the actual protection requirements of different loads. The short-circuit protection is fixed at multiples of the rated current and cannot be adjusted.
Q2: What kinds of loads is NZMN1-A32 suitable for?
A2: It applies to medium and small industrial loads such as motors, distribution lines and main circuits of control cabinets.
Q3: What is the difference between it and ordinary air switches?
A3: As an MCCB (Molded Case Circuit Breaker), it offers higher breaking capacity and better adaptability for industrial use, making it suitable for more complex power environments.
Q4: How can I place an order or apply for bulk purchase discounts?
A4: Send your required order quantity via email to Irene8866@163.com, or leave us a message on WhatsApp (+86 18950163907). We will reply within 24 hours with formal quotation and stock confirmation.
For more product information, please contact our professional sales team to obtain the latest pricing and stock information for the Eaton NZMN1-A32!
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