Eaton NZM Series NZMN3-AE630 — NZM3‑Frame 3‑Pole Molded Case Circuit Breaker (MCCB), 630A, Thermal‑Magnetic T268, Adjustable 315–630A, 50 kAIC @ 415V / 42 kAIC @ 480V, Front Screw Connection

Product overview The Eaton NZMN3-AE630 is a complete NZM3‑frame molded case circuit breaker (MCCB) engineered for heavy‑duty low‑voltage distribution protection. This three‑pole thermal‑magnetic unit provides adjustable long‑time (overload) protection and high short‑circuit interrupting capacity for industrial and commercial switchgear applications.

Key specifications

• Manufacturer: Eaton
• Series / Frame: NZM Series — NZM3 frame (NZMN3 family)
• Catalog number / Part no.: NZMN3-AE630
• Product type: Molded Case Circuit Breaker (MCCB) — Distribution circuit protection
• Poles: 3‑pole
• Rated current: 630 A
• Overload / setting range (Long‑time): 315–630 A (adjustable)
• Trip type / trip unit: Thermal‑magnetic, T268 designation
• Trip rating (short‑time / delayed): 1260–5040 A delayed (manufacturer data)
• Voltage rating: 690 V AC (rated)
• Short‑circuit breaking capacity / Interrupt ratings:
  • 50 kAIC at 415 V AC
  • 42 kAIC at 480 V AC
• Connection method: Front screw (line/load)
• Accessories: Rocker lever, motor drive (optional)
• Dimensions (W x H x D): 5.512 in x 5.512 in x 5.512 in (approx.)
• Weight: 15.84 lb
• Certifications: UL Listed
• Typical application range: protective setting and thermal/magnetic coordination for 315–630 A feeders

Features & benefits

• NZM3 frame provides high current capacity and compatibility with Eaton NZM accessory ecosystem (auxiliary contacts, shunt trips, motor drives).
• Adjustable overload range (315–630 A) for flexible coordination with upstream/downstream protective devices.
• High interrupting capabilities suitable for high‑fault environments: 50 kAIC @ 415 V and 42 kAIC @ 480 V.
• Thermal‑magnetic trip (T268) combines long‑time overload protection and instantaneous short‑circuit protection in one unit.
• Front screw connections enable secure terminations for robust installations.

Applications

• Low‑voltage distribution switchgear, main feeders, branch feeders, motor protection in industrial and commercial electrical systems requiring high interrupting capability and adjustable protection.

Installation & safety notes

• Use Eaton time‑current curves and coordination guides to configure long‑time, short‑time and instantaneous settings for selectivity and system protection.
• Confirm compatibility of chosen accessories (rocker lever, motor drive) with NZM3 frame and intended mounting.
• Follow manufacturer installation instructions for torque values, mounting clearances and ambient derating.
• Verify that interrupting ratings meet local utility and code requirements for the installation.

Documentation & support

• For detailed trip curves, accessory ordering, mechanical drawings and installation instructions, consult the Eaton NZM series product datasheet and technical support.