Eaton NZMH2-A40-NA Molded Case Circuit Breaker - UL Listed
Part Number: NZMH2-A40-NA
Quick Summary
NZMH2-A40-NA Molded Case Circuit Breaker protects electrical distributions with precise short‑circuit and overload protection in industrial panels. In compact control rooms and crowded switchgear, assembling reliable protection without sacrificing space or service continuity is a frequent challenge. UL Listed and CSA/IEC compliant, it meets essential safety and interoperability standards demanded by modern facilities. With adjustable thermal‑magnetic trip, front‑screw connection, and motor-drive compatibility, this breaker supports faster commissioning, easier maintenance, and lower total cost of ownership for motor drives and distribution cabinets.
Product Information
Extended Description
NZMH2-A40-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMH2, Adj. thermal, Adj. magnetic trip, Three-pole, 40A, 750 Vdc, Dist. circuit protection, motor drive, 32-40A, 320-400A delayed, 32-40A, conforms to UL/CSA and IEC
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMH2-A40-NA
EAN
4015082692315
Product Length/Depth
4.05 in
Product Height
7.24 in
Product Width
4.13 in
Product Weight
5.5 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.
Certifications
UL Listed
Amperage Rating
40 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
320-400A delayed
Setting Range Ol Protector
32-40A
Short-circuit breaking capacity
150 kAIC
Interrupt rating
85-150 kAIC
Connection
Front screw
Overload range
32-40A
Number of poles
Three-pole
Compact circuit-breakers and switch-disconnectors up to 1600 A
Eaton Specification Sheet - NZMH2-A40-NA
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Adjustable thermal-magnetic trip provides precise protection while preserving coordination between upstream and downstream devices. Business impact: reduces nuisance trips, extends equipment life, and lowers maintenance costs. Application: motor drives and distribution panels in manufacturing lines, packaging equipment, and automated assemblies. Feature: 40 A rating with 690 Vac / 750 Vdc ratings and a 150 kAIC short-circuit breaking capacity. Business impact: ensures reliable fault clearance for high-energy mains, improving system uptime under demanding load conditions. Application: feeder circuits, machine controllers, and power distribution blocks in industrial facilities. Feature: NZM2 frame three-pole design with front screw connections. Business impact: simplifies installation, aligns with common enclosure standards, and accelerates commissioning. Application: retrofit or new installations in control panels and switchgear that follow standard NZM2 mounting patterns. Feature: Setting ranges for overload and delayed short-circuit release (32-40 A OL protector; 320-400 A delayed). Business impact: enables selective protection and coordinated tripping in motor-driven systems, reducing unplanned outages. Application: motor drives, conveyor systems, pumps, and other loads with variable inrush. Feature: Optional accessories including rocker lever and motor-drive compatibility. Business impact: improves operator control and integration with motor-drive systems, enabling smoother remote operation and panel layout optimization. Application: new builds and panel upgrades in automation plants. Feature: UL Listed certification and documented warranty (one year from installation or 18 months from shipment). Business impact: procurement assurance and easier compliance with purchasing policies. Application: any facility needing verified safety compliance and reliable vendor support.
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FAQs
Install the NZMH2-A40-NA as a three-pole device on the NZM2 frame with front screw terminals. Use the front-access mounting and ensure correct alignment with enclosure rails. Verify the torque for terminal connections and set the adjustable thermal-magnetic trip to match motor inrush and load profiles. This setup enables reliable protection with straightforward maintenance checks.
Verify 40 A nominal rating, 690 Vac / 750 Vdc voltage ratings, and adjustable thermal-magnetic trip. Check short-circuit breaking capacity of up to 150 kAIC and an interrupt rating of 85–150 kAIC. Ensure the device is UL Listed and compatible with CSA/IEC standards for your installation and regulatory requirements.
Yes. With adjustable trip settings and a three-pole design, the NZMH2-A40-NA provides selective protection for motor drives, conveyors, and pump panels. Its front-screw connections support clean panel layouts, and the rocker lever accessory facilitates quick motor-drive control in automated systems.
The NZMH2-A40-NA is UL Listed and conforms to CSA and IEC standards for broad market compatibility. It carries Eaton’s warranty policy of one year from installation or eighteen months from shipment, whichever occurs first, offering procurement confidence and post-sale support.
Yes. The 32-40 A overload setting and 320-400 A delayed short-circuit release support selective coordination with upstream devices. This enables targeted tripping in motor-drive circuits and distribution panels, minimizing downtime while maintaining robust fault isolation in industrial environments.