Description

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Product Overview

Upgrade your 400A frame circuit breakers with our precision-engineered switch terminal 400 frame 4x16. Designed specifically to solve terminal bottleneck limitations, this high-conductivity copper terminal expands a single connection into four 16mm² outgoing connections. By significantly increasing contact surface area, it effectively lowers temperature rise, prevents thermal overloading, and ensures stable performance in high-density switchgear cabinets and distribution boxes.

Key Highlights:

4-Way Outgoing Expansion: Easily connect four $16\text{ mm}^2$ cables to a standard 400A breaker terminal.

Superior Thermal Management: Enlarged contact area lowers overall temperature rise under continuous full loads.

Custom OEM/ODM Fit: Precise mounting hole spacing designed to fit major 400A frame circuit breaker brands seamlessly.

High Electrical Conductivity: Manufactured from premium pure copper (or high-grade brass options) with anti-corrosion plating.

Technical Specifications

Parameter / Feature	Specification Details
Product Model	Switch Terminal 400 Frame 4x16
Applicable Breaker	400A Frame Molded Case Circuit Breakers (MCCB) / Air Circuit Breakers (ACB)
Outgoing Connections	4 Channels × 16 mm216 mm2 (6 AWG−4 AWG6 AWG−4 AWG)
Rated Current (InIn)	Up to 400A Continuous
Base Material	High-Conductivity Electrolytic Copper (E-Cu) / Premium Brass
Plating Options	Electro-tin Plated (Standard) / Nickel Plated
Mounting Mechanism	Direct bolt-on fitting for 400A frame terminal busbar / Cage clamp mechanism
Torque Rating	Designed to withstand high tightening torque without mechanical deformation
Standard Compliance	IEC / CE / RoHS compliant

Core Advantages

Optimized Contact Area for Lower Temperature Rise

Standard OEM breaker terminals often lack sufficient surface area when branch wiring is added onsite, leading to localized hot spots. Our custom 4-hole extension busbar increases contact contact surface area, ensuring heat dissipates rapidly and maintaining safe operating temperatures.

Seamless 4-Way Cable Splitting (4×16mm²)

Eliminate messy, dangerous multi-lug stacking on a single breaker lug. The integrated 4-port structure enables clean, organized, and reliable power distribution for medium-scale switchgear panels.

Heavy-Duty Construction for High Reliability

Forged/stamped from high-grade conductive copper, these terminals resist high short-circuit electromagnetic stress and thermal oxidation, guaranteeing maintenance-free long-term service life.

Flexible Customization for OEM Panel Builders

We offer tailored hole spacing, custom bolt sizes, and specific plating thicknesses to match your exact panel builder design requirements and brand-specific MCCB terminal layouts.

Wire Cage Terminal vs Traditional Brass Terminal

Performance Feature	Lingcheng Wire Cage / Copper Expansion Terminal	Traditional Brass Screw Terminal
Current Carrying & Conductivity	High – Electrolytic copper provides maximum electrical conductivity and minimal energy loss.	Moderate – Standard brass has lower conductivity, increasing thermal losses at 400A.
Contact Surface Area	Expanded – Custom engineered interface minimizes contact resistance and heat buildup.	Limited – Standard lug-to-plate contact often causes localized overheating under heavy loads.
Multi-Cable Wiring Capacity	Dedicated 4-Port Design – Securely accommodates four 16 mm216 mm2 lines without overcrowding.	Crowded / Stacked – Stacking multiple cable lugs on one terminal causes loose clamps and arcing risks.
Vibration & Loosening Resistance	High – Retains spring tension or robust clamping force over extended operating cycles.	Low to Moderate – Screw connections tend to loosen due to thermal expansion cycles.

Professional Production Process

1.Raw Material Selection & Testing

We source high-purity electrolytic copper billets, verifying electrical conductivity and mechanical hardness before production begins.

2.Precision Stamping & CNC Machining

Automated high-speed stamping presses and multi-axis CNC machines ensure tight tolerances, smooth edges, and perfect hole alignment for the 400A frame interface.

3.Surface Treatment & Anti-Oxidization

Electroplating (tin or nickel plating) is applied to prevent copper oxidation, salt-spray corrosion, and contact resistance degradation.

4.100% Dimensional & Quality Inspection

Every batch undergoes strict thread checks, torque testing, coating thickness analysis, and conductivity verification before packaging.

Material & Surface Treatment Options

Base Material Options:

T2 / E-Cu Pure Copper: Maximum electrical conductivity (＞98%IACS), perfect for high-load 400A power distribution circuits.

H59 / H62 Brass: Cost-effective alternative for moderate electrical loads and lower budget projects.

Surface Treatment Options:

Electro-Tin Plating (Standard): Excellent oxidation resistance, smooth solderability/contact, and low contact resistance.

Nickel Plating: Superior corrosion resistance in harsh, humid, or chemical industrial environments.

Bare / Unplated Copper: Available upon customer request for specific welding or custom processing needs.

Application Scenarios

Medium Switchgear Cabinet Manufacturing: Ideal for panel builders requiring standardized, neat outgoing power lines from main 400A circuit breakers.

Circuit Breaker Accessory Integration: Supplied directly to circuit breaker accessory distributors and OEMs looking for high-quality expansion terminals.

Industrial Power Distribution Centers: Used where multiple $16\text{ mm}^2$ branch cables need to be driven directly from a central 400A breaker unit without extra busbar blocks.

Commercial Building Sub-Panels: Reliable branch connection expansion in compact electrical closets with space constraints.

Frequently Asked Questions

Q: Can this terminal fit all standard 400A frame circuit breakers?

A: Our standard terminal is designed to match the most common 400A MCCB/ACB terminal hole spacings. Additionally, we offer custom OEM dimensions to match specific breaker models from brands like Schneider, ABB, Siemens, or local manufacturers.

Q: What is the lead time for bulk OEM orders?

A: Standard samples are available within 3-5 business days. For mass production orders (5,000+ pieces), our standard delivery time is 15-25 days depending on material specifications and plating requirements.

Q: Do you offer customized bolt sizes or wire port diameters?

A: Yes! We fully support custom terminal designs. You can provide your drawing or samples, and our engineering team will produce tailored samples for your verification.