Eaton NZMH2-4-A63 molded case circuit breaker - Four-pole
Part Number: NZMH2-4-A63
Quick Summary
Eaton NZMH2-4-A63 molded case circuit breaker provides reliable overcurrent protection for distribution panels and industrial machinery. Engineers often face the challenge of selecting devices that balance precise trip coordination with easy installation in crowded panel spaces. Typical certifications for this class of MCCB include CE marking and UL/CSA approvals, with IP ratings and SIL considerations depending on the installation environment; confirm certification details with Eaton for your exact site requirements. This solution supports distribution circuit protection and scalable protection schemes, delivering business value through reduced downtime, easier maintenance, and improved safety in electrical distribution networks.
Product Information
Extended Description
NZMH2-4-A63 Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMH2, adj. thermal, adj. magnetic trip, Four-pole, 63A, 690 Vac, 750 Vdc, 85-150 kAIC, Distribution circuit protection, 50-63A, 380-630A delayed, Front screw, 50-63A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMH2-4-A63
EAN
4015082658274
Product Length/Depth
4.05 in
Product Height
7.24 in
Product Width
4.13 in
Product Weight
5.17 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Compliances
Contact Manufacturer
Amperage Rating
63 A
Voltage rating
690 Vac, 750 Vdc
Trip Type
Adjustable thermal, adjustable magnetic
Circuit breaker type
NZMH2
Frame
NZM2
Class
Distribution circuit protection
Accessories
Rocker lever, motor drive
Adjustment range short-circuit release
380-630A delayed
Setting Range Ol Protector
50-63A
Short-circuit breaking capacity
150 kAIC
Interrupt rating
85-150 kAIC
Connection
Front screw
Overload range
50-63A
Number of poles
Four-pole
Feature: Four-pole design with NZM2 frame and a 63 A rating enables higher current handling in compact footprints. Benefit: Maximizes panel density and improves fault isolation in multi-circuit distributions, making it ideal for machine control centers and switchgear assemblies. Application: Suitable for electrical distribution panels in manufacturing lines and processing facilities. Feature: Adjustable thermal and magnetic trip provides precise coordination. Benefit: Reduces nuisance trips while maintaining protection for motors and loads, lowering maintenance costs and improving process stability. Application: Critical in synchronized plant operations where uptime is essential. Feature: Short-circuit release adjustable from 380–630 A (delayed). Benefit: Scales protection to accommodate varying fault currents without replacing devices, saving time during system upgrades. Application: Feeder protection in evolving plants with changing fault profiles. Feature: Front screw connection supports straightforward installation and retrofits. Benefit: Speeds up installation and minimizes panel modification, improving project timelines. Application: Retrofit projects and new installations in control panels. Feature: Accessories such as rocker lever and motor drive ready the unit for common automation setups. Benefit: Enables immediate integration with motor starters and control circuits, reducing commissioning effort. Application: Motor control centers and device protection assemblies.
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FAQs
NZMH2-4-A63 uses a front screw connection and NZM2 frame geometry, making it straightforward to install in standard distribution panels or retrofit existing MCCBs. Its four-pole design supports compact layouts while preserving proper fault isolation. Always verify panel support tooling and torque specifications, and refer to Eaton installation guidelines for your exact enclosure.
Key specs include an amperage rating of 63 A, voltage ratings of 690 Vac and 750 Vdc, and a short-circuit breaking capacity up to 150 kAIC with an adjustable trip type defined as thermal and magnetic. The unit is four-pole, with front-accessible connections and an adjustable long-time and short-time protection range to tailor coordination.
Yes. The NZMH2-4-A63 is designed for distribution circuit protection within MCCs and panelboards, offering four-pole protection, adjustable trip, and motor-protection-ready accessories. Its NZM2 frame aligns with common MCCB assemblies, enabling reliable circuit protection in motorized applications and feeder circuits.
Compliances are provided by the manufacturer; the product page notes to contact the manufacturer for certification details. For project planning, confirm regulatory approvals such as CE, UL/CSA, and regional safety certifications with Eaton to ensure alignment with local electrical codes and your facility’s safety standards.
Maintenance benefits come from adjustable trip settings that reduce nuisance trips and improve system uptime. The device's modular design, available accessories, and front-side installation support faster commissioning and easier service. Over time, improved reliability and reduced unplanned downtime translate into lower operating costs and a clear return on investment for distribution and machine-control architectures.