SIEMENS JXD63H400 Molded Case Circuit Breaker

Description

SIEMENS JXD63H400 Molded Case Circuit Breaker

Product Dimensions：

The Siemens JXD63H400 is a 400-Ampere, 3-Pole Motor Circuit Protector (MCP) / Molded Case Circuit Breaker from Siemens’ renowned Sentron™ Series (JD Frame). Unlike standard thermal-magnetic breakers, this unit is an ETI (Electric Trip Instantaneous / Magnetic-Only) breaker, specifically engineered to provide high-instantaneous short-circuit protection for motor branch circuits.

Technical Specifications

Product Advantages

• Optimized for Motor Loads: Designed to handle high inrush starting currents without nuisance tripping while offering instantaneous trip response to high-fault short circuits.
• High Instantaneous Range: Provides an adjustable magnetic pick-up range (2000 A–4000 A), allowing precise tuning to match the specific locked-rotor current of the motor.
• Industrial Reliability: Heavy-duty JD frame construction ensures robust performance in high-demand power environments.
• Versatile Integration: Seamlessly mounts inside Siemens Sentron panelboards, switchboards, and Motor Control Centers (MCCs).

Important Considerations & Precautions

• Requires Thermal Overload Protection: Because the JXD63H400 is a magnetic-only breaker, it does not provide thermal overload protection on its own. It must be paired with an appropriate motor starter equipped with thermal/electronic overload relays to meet National Electrical Code (NEC) requirements.
• Lugs Sold Separately: Standard units generally ship without terminal lugs installed. Verify whether lug kits (e.g., TA2J6500) are required for your wire size during installation.
• LCC/MCC Coordination: Always perform a coordination study before adjusting the magnetic trip dial to ensure proper selective coordination with upstream breakers.
• Migration Note: For new installations or legacy upgrades, Siemens recommends considering the newer 3VA Series equivalents (such as the 3VA63 series) depending on plant requirements.

Product Applications

• Motor Control Centers (MCCs): Provides short-circuit protection for individual motor branch circuits inside industrial control centers.
• Heavy Industrial Drives: Used in combination with starters to power heavy-duty pumps, compressors, blowers, and conveyor systems.
• Commercial Power Distribution: Installed in switchboards and distribution panelboards where magnetic-only branch protection is required.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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