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  • New Quality Alternator Rectifier Diode Plate for honda 021580-4850 RN-04 31-8218 INR736 INR739
  • New Quality Alternator Rectifier Diode Plate for honda 021580-4850 RN-04 31-8218 INR736 INR739
New Quality Alternator Rectifier Diode Plate for honda 021580-4850 RN-04 31-8218 INR736 INR739

New Quality Alternator Rectifier Diode Plate for honda 021580-4850 RN-04 31-8218 INR736 INR739

  • >= 10 Pieces
    $5
View product details

New Quality Alternator Rectifier Diode Plate for honda 021580-4850 RN-04 31-8218 INR736 INR739

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Voltage Regulation: Maintains stable voltage output from the alternator for reliable battery charging and electrical system efficiency in vehicles.
  • Current Conversion: Rectifies alternating current (AC) to direct current (DC) using high-performance diodes, ensuring optimal power distribution for automotive electronics.

Key features

  • 1. Advanced Material Technology

    • With a copper alloy core and durable composite body, this rectifier diode plate ensures optimal electrical conductivity and thermal resistance. The corrosion-resistant design outperforms standard plastic-based components*, maintaining performance in harsh automotive environments.

  • 2. Precision Engineering for Secure Installation

    • The robust mounting system with reinforced bolt points allows seamless integration into tight engine compartments. Designed to match OEM specifications for Honda and Nissan models, it ensures stable attachment even under high-vibration conditions.

  • 3. Stable Voltage Regulation Performance

    • With precise voltage stabilization technology, this diode plate maintains consistent power output across varying engine loads. This ensures reliable battery charging and prolongs the lifespan of connected electrical components compared to generic alternatives*.

  • 4. Brand-Specific Compatibility

    • Engineered to fit Honda (e.g., 021580-4850) and Nissan models like the Sunny, this component guarantees direct replacement compatibility. Its tailored design addresses the unique electrical demands of 1.3L–1.7L engines, enhancing reliability for targeted applications.

  • 5. Automotive-Grade Durability

    • Constructed to meet automotive industry safety and durability standards, this diode plate withstands extreme temperatures and mechanical stress. Its compact, corrosion-resistant build ensures long-term performance in demanding automotive environments.

Product details

New Quality Alternator Rectifier Diode Plate for honda 021580-4850 RN-04 31-8218 INR736 INR739

The New Quality Alternator Rectifier Diode Plate is a precision-engineered component designed to ensure stable voltage regulation in Honda and Nissan vehicles with 1.3L, 1.7L, and diesel (d) engines. Crafted from a durable dark gray composite body and copper alloy terminals, this diode plate optimizes electrical system efficiency while withstanding automotive-grade vibrations and thermal stress.

Technical specifications

FeatureSpecificationBenefit
MaterialDark gray composite body, copper alloy terminalsEnhanced conductivity and corrosion resistance
DesignCompact semi-circular shape with 4 mounting pointsSpace-saving installation and robust structural integrity
Engine Compatibility1.3L, 1.7L, 1.7L d (diesel), 160 AGM systemsDirect fit for Honda (021580-4850, RN-04) and Nissan (Sunny) models
CertificationMeets ISO 16750-2 (electrical load) and SAE J1171 standardsGuaranteed reliability under extreme automotive conditions
Voltage Regulation±5% accuracy at 12-15V outputConsistent battery charging and system stability

Customization guide

Adjustable mounting point configurations and connector ports can be tailored to fit non-standard engine layouts or hybrid systems. For high-current applications, copper alloy thickness can be increased by 20% to enhance thermal dissipation.

Get inspired

With its compact design and precision-engineered terminals, this diode plate ensures uninterrupted power flow in demanding automotive environments. Whether upgrading an older Honda model or optimizing a Nissan Sunny’s electrical system, this component delivers unmatched durability and efficiency.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Voltage Regulation±5% accuracy±3.5% accuracy*±2% accuracy*
Thermal Resistance120°C140°C160°C
Connector Density6 ports8 ports10 ports
Weight250g280g (+12%)310g (+24%)

*Compared to industry-standard diode plates

Supplier's note

  1. Technical Breakthroughs:

    • Copper Alloy Terminals: 20% lower electrical resistance than traditional aluminum alloys, enabling higher current handling.
    • ISO 16750-2 Compliance: Withstands voltage spikes up to 40V, protecting sensitive electronics during engine starts.
    • Modular Design: Adjustable mounting brackets reduce installation time by 30% compared to fixed models.

  2. Version Selection Guide:

    • Base Model: Ideal for standard Honda/Nissan models with 1.3L-1.7L engines.
    • Advanced Model: Choose for diesel (1.7L d) or high-output alternators requiring ±3.5% voltage precision.
    • Pro Model: Required for vehicles with hybrid systems or frequent high-temperature operation (e.g., towing, off-road use).

With the Pro Model’s 160°C thermal resistance, you can safely handle extreme under-hood temperatures, ensuring uninterrupted power delivery during prolonged engine use. Pair its 10-port connector design with multi-function alternators to future-proof your electrical system upgrades.

Frequently asked questions

  • Which Honda models is the New Quality Alternator Rectifier Diode Plate (021580-4850) compatible with?

  • How does the copper alloy in the regulator improve performance for automotive use?

  • Can this voltage regulator be installed in Nissan vehicles with similar specifications?

  • What’s the recommended maintenance for the alternator rectifier diode plate?

  • Does this regulator meet Honda’s original quality standards?

  • How does the design handle high-current scenarios in diesel engines (e.g., 1.7D)?

  • Is this a direct replacement for the INR736/INR739 variants?

  • What’s the expected lifespan of this voltage regulator compared to OEM parts?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Industry Standard Rectifier Diode PlateGeneral automotive maintenance100A current capacity (SAE J1171), 120°C max (ASTM D624)Affordable, widely compatibleLimited to standard loads, no OEM-specific optimizations
Our Base Rectifier Diode PlateHonda Civic (1.3L/1.7L), light-duty use120A ▲20% (SAE J1171), copper alloy contacts (ASTM F1498)Enhanced durability, Honda-specific fitmentModerate cost increase vs. standard
Our Advanced Rectifier Diode PlateHigh-performance Honda engines150A ▲50%, 150°C (ASTM D624), 0.5dB quieter (ISO 3744)Superior heat resistance, reduced noisePremium pricing, requires professional installation
Competitor A's High-Temperature PlateOff-road vehicles, extreme environments140A, 140°C (ASTM D624)Robust heat toleranceBulky design, limited cross-brand compatibility
OEM Honda Diode PlateFactory Honda replacementsOEM fit (ISO 3799), 110A (SAE J1171)Direct OEM match, warranty eligibilityHigher cost than aftermarket alternatives
Universal Alternator Diode ModuleCross-brand applications, DIY repairsAdjustable voltage (12-14.4V), 100A (SAE J1171)Versatile, easy installationLower capacity than specialized parts, no OEM-specific tuning

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