Eaton NZMH2-AF20-BT-NA Molded Case Breaker - UL Listed
Part Number: NZMH2-AF20-BT-NA
Quick Summary
NZMH2-AF20-BT-NA Molded Case Breaker is designed to protect distribution circuits within industrial and commercial power systems. Engineers often face challenges with improper trip settings, installation complexity, and compatibility during panel upgrades. This device leverages an adjustable thermal, fixed magnetic trip on a robust NZM2 frame to deliver precise protection while meeting safety expectations. With UL Listed certification and a 20 A rating, it supports reliable performance in demanding environments, facilitating compliant power distribution. In practice, it reduces downtime and improves maintenance planning by aligning protection characteristics with common industrial loads and panel architectures.
Product Information
Extended Description
NZMH2-AF20-BT-NA Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMH2, Adj. thermal, fixed magnetic trip, Three-pole, 20A, 690 Vac, 750 Vdc, 85-150 kAIC, Box, Distribution circuit protect., 20-20A, Front frame clamp, 20-20A
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMH2-AF20-BT-NA
EAN
4015081074570
Product Length/Depth
4.05 in
Product Height
7.24 in
Product Width
4.13 in
Product Weight
4.1 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
20 A
Voltage rating
690 Vac, 750 Vdc
Trip Type
Adjustable thermal, fixed magnetic
Circuit breaker type
NZMH2
Terminals
Box
Frame
NZM2
Class
Distribution circuit protection
Accessories
Rocker lever, motor drive
Adjustment range short-circuit release
350-350A delayed
Setting Range Ol Protector
20-20A
Short-circuit breaking capacity
150 kAIC
Interrupt rating
85-150 kAIC
Connection
Front frame clamp
Overload range
20-20A
Number of poles
Three-pole
Feature: Adjustable thermal, fixed magnetic trip → Business Impact: Enables precise coordination and selective protection for multi-load panels, reducing nuisance trips and equipment wear → Application: Ideal for distribution circuits in automation racks and switchgear where load diversity exists. Feature: 3-pole NZMH2 frame, 20 A rating → Business Impact: Provides robust 3-phase protection with standardization across small-to-medium industrial lines, streamlining procurement and stocking → Application: Suitable for compact panel boards and control cabinets in manufacturing lines. Feature: High fault current capability up to 150 kAIC → Business Impact: Ensures quick, reliable interruption of faults, protecting transformers, motors, and drives from damage → Application: Critical in high-energy installations and motor startup scenarios. Feature: Wide voltage rating 690 Vac / 750 Vdc → Business Impact: Supports dual AC/DC applications without multiple devices, improving system flexibility and reducing part counts → Application: Common in mixed-voltage distribution networks and process automation. Feature: Front frame clamp and box terminals → Business Impact: Simplifies installation and maintenance with secure connections and straightforward field wiring → Application: Facilitates rapid panel assembly and serviceability in OEM and retrofit projects. Feature: Accessories including rocker lever and motor drive → Business Impact: Enhances user control and automation compatibility, reducing manual intervention and startup time → Application: Beneficial for motor control centers and mechanized lines where remote operation is desired.
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FAQs
NZMH2-AF20-BT-NA uses a front frame clamp terminal design on the NZM2 frame and is configured as a three-pole device. It fits typical industrial panel boards and control cabinets, enabling straightforward wiring, secure mounting, and rapid field installation without specialized adapters. Ensure panel space accommodates the 4.13 in width and 7.24 in height and verify clearance for the 690 Vac / 750 Vdc rating.
The device combines an adjustable thermal element with a fixed magnetic trip to deliver precise overload protection and rapid fault interruption. With a setting range of 20-20 A and a short-circuit release option at 350 A, it supports coordinated protection for downstream devices while minimizing nuisance trips in mixed-load environments.
Yes, NZMH2-AF20-BT-NA is UL Listed, confirming conformance to established safety standards for electrical protection devices. Its 690 Vac / 750 Vdc capability, 3-pole configuration, and front frame clamp terminals make it a dependable choice for panel boards, motor control centers, and distribution panels in commercial and light-industrial applications.
The breaker offers a short-circuit breaking capacity of up to 150 kAIC with an interrupt rating of 85-150 kAIC. This means it can safely interrupt high fault currents without excessive arcing, protecting feeders, transformers, and connected equipment. Choose this rating to ensure robust protection for moderate to high-energy installations.
Accessories include a rocker lever and motor drive, which improve operator ergonomics and enable integration with motor control logic. Such options simplify manual control in maintenance scenarios and support automated startup sequences in panel assemblies, reducing commissioning time and improving overall control reliability in automation systems.