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Moulded Case Circuit Breakers
  • 3VE1 Protective Circuit Breakers with Competitive Circuit Breaker Price for siemens Motor protection Circuit Breakers
  • 3VE1 Protective Circuit Breakers with Competitive Circuit Breaker Price for siemens Motor protection Circuit Breakers
  • 3VE1 Protective Circuit Breakers with Competitive Circuit Breaker Price for siemens Motor protection Circuit Breakers
  • 3VE1 Protective Circuit Breakers with Competitive Circuit Breaker Price for siemens Motor protection Circuit Breakers
  • 3VE1 Protective Circuit Breakers with Competitive Circuit Breaker Price for siemens Motor protection Circuit Breakers
  • 3VE1 Protective Circuit Breakers with Competitive Circuit Breaker Price for siemens Motor protection Circuit Breakers
3VE1 Protective Circuit Breakers with Competitive Circuit Breaker Price for siemens Motor protection Circuit Breakers

3VE1 Protective Circuit Breakers with Competitive Circuit Breaker Price for siemens Motor protection Circuit Breakers

$5.25-$10.45/ Piece|10 Piece/Pieces(Min. Order)
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3VE1 Protective Circuit Breakers with Competitive Circuit Breaker Price for siemens Motor protection Circuit Breakers

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Motor Protection: Designed to safeguard HVAC systems against overcurrent, short-circuit, and ground faults, ensuring reliable operation at a rated voltage of 380V.
  • Three-Phase Compatibility: Supports industrial-grade HVAC applications with three-phase terminals (L1, L2, L3), enabling efficient power distribution in commercial and large-scale residential systems.

Key features

  • 1. Durable Material Construction

    • With a sturdy plastic and composite housing, ensure reliable insulation and longevity in harsh HVAC environments. The material resists corrosion and deformation, maintaining performance under prolonged use.

  • 2. Three-Phase Flexibility & Customizable Design

    • With three-phase terminals (L1, L2, L3) and customizable current ratings, easily adapt to diverse motor loads and wiring configurations (NC/NO contacts). This design offers ~20% faster installation compared to single-phase breakers*.

  • 3. Advanced Protection Features

    • With integrated overcurrent, short-circuit, and ground-fault protection, safeguard HVAC motors against damage. This ensures uninterrupted operation and extends equipment lifespan, reducing downtime by up to 30%*.

  • 4. HVAC-Specific Scenario Optimization

    • Designed for commercial and industrial HVAC systems, the compact DZ108-20 integrates seamlessly into existing setups without major modifications. Its continuous-duty rating supports 24/7 operation, ideal for high-demand environments.

  • 5. Cost-Effective Reliability

    • Offering competitive pricing compared to Siemens equivalents*, the Hvacstar Contactor balances affordability with premium performance. Its molded-case design meets industry safety standards for commercial HVAC applications.

Product details

3VE1 Protective Circuit Breakers with Competitive Circuit Breaker Price for siemens Motor protection Circuit Breakers

The Hvacstar Contactor DZ108-20 Motor Protection Circuit Breaker (MPCB) is a compact, three-phase solution designed for HVAC systems. Built with durable plastic housing and robust terminals, it ensures reliable overcurrent, short-circuit, and ground fault protection. Rated at 380V, it balances safety and efficiency in industrial and commercial environments.

Technical specifications

FeatureSpecificationApplication Scenario
MaterialDurable plastic housingWithstands environmental stress in HVAC systems
Rated Voltage380V ACEnsures compatibility with standard HVAC motors
Phase ConfigurationThree-phase (L1/L2/L3)Ideal for industrial HVAC systems requiring multi-phase power
Protection FeaturesOvercurrent/Short-Circuit/Ground FaultSafeguards motors in harsh operating conditions
Trip Current RangeAdjustable (up to 20A)Customizable to match motor load requirements

Customization guide

Adjustable trip current settings (up to 20A) and wiring configurations (NO/NC terminals) allow customization for specific motor loads or installation needs.

Get inspired

The DZ108-20’s compact design and three-phase capability make it perfect for retrofitting existing HVAC systems. Its robust protection features ensure uninterrupted operation, even in high-demand environments.

Choose your model

ParameterBase Model (DZ108-20)Advanced ModelPro Model
Rated Current20A30A (+50%)40A (+100%)
Breaking Capacity5kA6kA (+20%)8kA (+60%)
Protection ModesOvercurrent/Short-Circuit+Ground Fault+Overload Protection

Supplier's note

  1. Technical Breakthroughs:

    • Material Innovation: The plastic housing reduces weight by 20% compared to metal alternatives while maintaining insulation integrity.
    • Three-Phase Integration: Simplifies wiring in HVAC systems, cutting installation time by 30%.
    • Adjustable Trip Settings: Enables precise motor load matching, reducing downtime by 15%.

  2. Version Selection Guide:

    • Base Model: Ideal for standard HVAC systems (e.g., residential/commercial units) requiring 20A protection.
    • Advanced Model: Suitable for industrial HVAC setups with higher loads (up to 30A) and ground fault risks.
    • Pro Model: Best for large-scale commercial or heavy-duty industrial applications needing 40A capacity and overload protection.

With a rated voltage of 380V, you can ensure seamless compatibility with most HVAC motors. The Pro model’s 8kA breaking capacity outperforms industry standards by 60%, safeguarding against extreme overloads. Pair its overload protection with adjustable trip settings to optimize energy efficiency in high-demand scenarios.

Frequently asked questions

  • Which motor protection circuit breaker suits 380V HVAC systems?

  • How do I install the Hvacstar DZ108-20 MPCB in an HVAC system?

  • Why is the Hvacstar MPCB made of plastic instead of metal?

  • Can the DZ108-20 be customized for specific amperage needs?

  • Is the Hvacstar Contactor MPCB UL/CE certified?

  • What makes the DZ108-20 better than Siemens MPCBs?

  • Does the MPCB support both NO and NC wiring configurations?

  • How does the Hvacstar MPCB protect HVAC motors?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Material & ConstructionIndustrial HVAC systemsIndustry Standard: Plastic housing (ASTM D638 Flexural Strength 50 MPa)
Our Base: Reinforced composite (70 MPa)
Our Advanced: High-impact polymer (90 MPa)		Base: ▲ 40% stronger than Industry (ASTM D638)
Advanced: ▲▲ 80% stronger than Industry		Advanced: 20% higher cost due to specialized polymer
Rated VoltageHigh-voltage HVAC installationsIndustry Standard: 400V (IEC 60947-2)
Our Base: 400V (IEC 60947-2)
Our Advanced: 440V (IEC 60947-2)		Advanced: ▲▲ 10% higher voltage tolerance than Base (supports 440V systems)Base/Advanced may overcomplicate low-voltage setups
Protection FeaturesCommercial buildings with strict safety codesIndustry Standard: Overcurrent protection (IEC 60947-4-1)
Our Base: Overcurrent + Short-Circuit (IEC 60947-4-1)
Our Advanced: Overcurrent + Short-Circuit + Ground Fault		Base: ▲ Adds short-circuit protection (▲ 2x fault coverage)
Advanced: ▲▲ Adds ground fault detection (▲ 3x fault coverage)		Advanced: Requires skilled technicians for setup
Thermal PerformanceHarsh outdoor HVAC unitsIndustry Standard: -20°C to 70°C (IEC 60068-2-1)
Our Base: -25°C to 75°C
Our Advanced: -30°C to 80°C		Base: ▲ 5°C lower operating limit (▲ 25% colder tolerance)
Advanced: ▲▲ 10°C broader range than Industry		Base/Advanced: Unnecessary for standard indoor use
Chemical ResistanceChemical plant HVAC systemsIndustry Standard: Resists 10 chemicals (ASTM D543)
Our Base: 20 chemicals (ASTM D543)
Our Advanced: 30+ chemicals (ASTM D543)		Base: ▲ Doubles chemical resistance (▲ 100% improvement)
Advanced: ▲▲ 3x Industry (▲ 200% improvement)		Advanced: Heavier material increases installation effort
Noise LevelOffice HVAC systemsIndustry Standard: 50 dBA (ISO 140-9)
Our Base: 45 dBA (▲ 10% quieter)
Our Advanced: 40 dBA (▲▲ 20% quieter than Industry)		Advanced: ▲▲ Quieter than Base by 5 dBA (▲ 11% improvement)Advanced: 15% bulkier design

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