Eaton NZMH2-A250-S1 Molded Case Circuit Breaker - 85-150 kAIC
Part Number: NZMH2-A250-S1
Quick Summary
NZMH2-A250-S1 molded case circuit breaker protects industrial distributions from overloads and short circuits. Engineers often struggle with incorrect trip coordination and panel sizing, which leads to nuisance trips and unplanned downtime. Key certifications to verify include CE marking for European compliance, UL/CSA recognition where applicable, and IP ratings for enclosure integrity—confirm exact certifications with Eaton. With a 250 A rating and a 690 Vac / 750 Vdc capability, this device delivers reliable protection while enabling scalable panel designs and easy installation in control cabinets and switchgear. Its adjustable thermal and magnetic trip allows precise coordination with upstream protective devices, reducing downtime and improving overall system reliability.
Product Information
Extended Description
NZMH2-A250-S1 Eaton: Eaton Series NZM complete molded case circuit breaker, NZM2-frame, NZMH2, Adjustable thermal, adjustable magnetic trip type, Three-pole, 250A, 690 Vac, 750 Vdc, 85-150 kAIC, Distribution circuit protection
Product Name
Eaton Series NZM complete molded case circuit breaker
Catalog Number
NZMH2-A250-S1
EAN
4015082903664
Product Length/Depth
5.51 in
Product Height
5.86 in
Product Width
5.86 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
Certifications
Contact Manufacturer
Amperage Rating
250 A
Voltage rating
690 Vac, 750 Vdc
Trip Type
Adjustable thermal, adjustable magnetic
Circuit breaker type
NZMH2
Frame
NZM2
Class
Distribution circuit protection
Interrupt rating
85-150 kAIC
Number of poles
Three-pole
Feature → Business Impact → Application: The NZMH2-A250-S1 uses a 250 A amperage rating on a three-pole NZM2 frame to handle typical distribution loads with high predictability, reducing nuisance trips and improving feeder reliability in manufacturing lines and process plants. This translates to fewer production interruptions and smoother control system operation in switchgear assemblies and motor control centers. Application: Ideal for distribution panels in mid-size facilities where dependable overcurrent protection is essential and panel footprint constraints matter. Feature → Business Impact → Application: Adjustable thermal and magnetic trip provides tailored coordination with upstream protection devices, enabling precise fault discrimination and lower total downtime. This supports faster fault isolation and minimizes collateral outages in complex control architectures. Application: Beneficial for OEM panel builders and integrators designing control cabinets for conveyors, presses, and automated tooling.Feature → Business Impact → Application: 690 Vac / 750 Vdc voltage rating expands compatibility with varied electrical networks, enabling safe integration into both AC distribution systems and DC-link applications. This reduces the need for multiple device types and simplifies inventory. Application: Suitable for switchgear, motor control centers, and industrial power distribution where a single MCCB must cover diverse voltage zones.Feature → Business Impact → Application: High interrupt rating of 85-150 kAIC delivers robust fault clearance for systems with high short‑circuit currents, enhancing safety margins and protecting downstream equipment. Application: Critical in data centers, heavy manufacturing, and processing facilities where fault levels fluctuate and rapid interruption matters. Feature → Business Impact → Application: NZM2 frame compatibility and three-pole design enable straightforward installation and future upgrades within existing assemblies, reducing commissioning time and engineering effort. Application: Compatible with Eaton’s NZM2-based panels and modular switchgear, making retrofits and expansions cost-effective.
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FAQs
Install the NZMH2-A250-S1 as a three-pole unit within a compatible NZM2-frame enclosure. Ensure correct alignment with bus bars, secure mounting, and proper torque on terminal connections. Refer to Eaton’s specification sheet for mounting dimensions and wiring diagrams to avoid misalignment and ensure clear trip indication.
The device provides 250 A nominal current, 690 Vac and 750 Vdc voltage ratings, adjustable thermal and magnetic trip, three poles, NZMH2 circuit breaker type, NZM2 frame, and an interrupt rating of 85-150 kAIC. These specs support reliable distribution protection and flexible coordination with upstream devices.
Yes. With its 250 A rating, three-pole design, and adjustable trip, the NZMH2-A250-S1 is well-suited for distribution circuits in industrial control panels, switchgear, and motor control centers. Its high interrupt capacity helps protect downstream equipment from fault currents while allowing precise trip settings for coordination.
Exact certifications should be confirmed with Eaton, as compliances and certifications are specified by the manufacturer. Typical considerations include CE marking for European compliance and UL/CSA recognition, along with enclosure IP ratings where applicable. Always verify the current certification status before procurement.
Warranty is governed by Eaton Selling Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. Regular inspection of terminal torque, trip settings, and enclosure integrity is recommended to maintain optimal protection and reliability over the device’s lifecycle.