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  • RTT7121C RTT7121 Air Conditioning 12V 40A Automotive Relay
  • RTT7121C RTT7121 Air Conditioning 12V 40A Automotive Relay
  • RTT7121C RTT7121 Air Conditioning 12V 40A Automotive Relay
  • RTT7121C RTT7121 Air Conditioning 12V 40A Automotive Relay
  • RTT7121C RTT7121 Air Conditioning 12V 40A Automotive Relay
  • RTT7121C RTT7121 Air Conditioning 12V 40A Automotive Relay
RTT7121C RTT7121 Air Conditioning 12V 40A Automotive Relay

RTT7121C RTT7121 Air Conditioning 12V 40A Automotive Relay

  • 1 - 499 Pieces
    $0.65
  • 500 - 4999 Pieces
    $0.57
  • 5000 - 49999 Pieces
    $0.46
  • >= 50000 Pieces
    $0.35

Customization:

Customized logo（Min.Order: 2000 pieces）
Customized packaging（Min.Order: 2000 pieces）
Graphic customization（Min.Order: 2000 pieces）
View product details

RTT7121C RTT7121 Air Conditioning 12V 40A Automotive Relay

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • High-Current Switching: Designed to control 12V automotive systems, capable of handling up to 40A currents, enabling reliable operation of air conditioning units, lighting, and other high-power components.
  • Electrical System Integration: Acts as a critical component in automotive electrical circuits, allowing low-current signals to activate high-current loads, ensuring efficient power management.

Key features

  • 1. Corrosion-Resistant Metal Base

    • With a corrosion-resistant metal base, ensure reliable electrical contact in harsh automotive environments. This design extends durability compared to relays with fully plastic components*, enhancing longevity in moisture-prone areas like engine compartments.

  • 2. Compact Robust Design with Universal Mounting

    • With a compact, robust design featuring a mounting hole and terminals, enable easy installation in various vehicle positions. The flat-top structure allows secure attachment to dashboards or engine bays, outperforming bulkier relays in space-constrained areas*.

  • 3. 40A High-Current Capacity

    • With a 40A current capacity, handle higher loads than standard 30A automotive relays*. Ideal for demanding systems like air conditioning or power windows, ensuring stable performance under heavy electrical demand.

  • 4. Weather-Sealed Plastic Casing

    • With a moisture- and dust-resistant plastic casing, maintain reliable operation in extreme temperatures and harsh weather. This protects internal components better than non-sealed alternatives*, safeguarding functionality in rain, snow, or dusty environments.

  • 5. CE-Certified Universal Compatibility

    • With CE certification, meet EU safety and performance standards for automotive electronics. Compatible with universal and brand-specific models (e.g., Nissan Sentra, Peugeot 308), offering broader applicability than non-certified or model-specific relays*.

Product details

RTT7121C RTT7121 Air Conditioning 12V 40A Automotive Relay

The RTT7121C RTT7121 12V 40A Automotive Relay is a durable, high-performance relay designed for automotive applications requiring reliable control of high-current systems. Built with corrosion-resistant materials and a compact design, it ensures seamless integration into vehicles like the Nissan Sentra, Peugeot 308, and others. CE-certified and compatible with models from 1996 to 2015, this relay handles up to 40A, making it ideal for air conditioning, headlights, and other power-intensive systems.

Technical specifications

FeatureSpecificationBenefit
Voltage12.0VEnsures compatibility with standard automotive electrical systems.
Current Capacity40ASupports high-power applications like AC systems and engine components.
CertificationCEMeets EU safety and quality standards for automotive parts.
MaterialPlastic casing with corrosion-resistant metal base (brass/aluminum)Resists moisture, temperature fluctuations, and environmental wear.
DesignCompact, flat-top with mounting holeEnables secure installation in tight spaces and varied orientations.
CompatibilityUniversal fitment for multiple car models (Nissan, Peugeot, etc.)Ensures seamless integration across diverse vehicle types.

Customization guide

Adjustable parameters include:

  • Current Rating: Customize between 30A and 40A to match specific system requirements.
  • Terminal Configuration: Modify terminal spacing for compatibility with non-standard mounting setups.
  • Material Coating: Add protective coatings (e.g., IP67-rated) for extreme environmental conditions.

Get inspired

With its 40A capacity and corrosion-resistant design, this relay is perfect for managing high-current automotive systems. Whether upgrading your Peugeot 308’s AC or ensuring reliable power distribution in a Nissan Sentra, this relay delivers durability and efficiency in all weather conditions.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Current Capacity30A35A40A (Industry Leading)
Temperature Range-25°C to 85°C-30°C to 90°C-40°C to 105°C
CertificationsCECE + RoHSCE + RoHS + IP67
Application FocusStandard systemsHigh-current appliancesExtreme environments

Supplier's note

  1. Technical Breakthroughs:

    • 40A Capacity: Outperforms industry standards by 20%, enabling control of high-power AC units and engine systems.
    • Corrosion-Resistant Metal Base: Reduces failure risks in salt-heavy or humid environments.
    • Universal Compatibility: Fits over 20+ models (e.g., Nissan Sentra VI, Peugeot 308) without modification.

  2. Version Selection Guide:

    • Base Model: Ideal for standard applications (e.g., basic AC systems) in temperate climates.
    • Advanced Model: Suitable for vehicles with high-current appliances (e.g., heated seats, LED lighting).
    • Pro Model: Best for extreme conditions (e.g., off-road vehicles, heavy-duty trucks) needing IP67-rated protection.

With the Pro Model’s triple-certification and -40°C to 105°C range, users can safely operate in harsh environments while maintaining reliability. Pair its 40A capacity with the metal base’s conductivity to ensure seamless power distribution across critical systems.

Frequently asked questions

  • Which RTT7121C model suits Nissan Sentra VI B16 automotive applications?

  • How to clean the terminals of the RTT7121C automotive relay?

  • Plastic vs Metal: Why is the RTT7121C casing made of plastic?

  • Can RTT7121C be customized for Peugeot 308 4A/4C systems?

  • Is RTT7121C CE-certified for automotive relay use?

  • Can RTT7121C handle 40A continuously in humid conditions?

  • Does RTT7121C fit upside-down installations in tight spaces?

  • Which RTT7121C variant matches OE number "12V1516AA Henschel"?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Voltage CompatibilityAutomotive systems (AC, lighting)Industry Standard: 12V (ISO 6469-2 compliant)
Our Base: 12V (ISO 6469-2)
Our Advanced: 12V + reverse polarity protection (▲ IEC 60695-2-11)		Ensures compatibility with most vehicles.
Advanced: Prevents damage from reversed wiring.		Limited to 12V systems (can’t handle 24V trucks).
Advanced: Slightly heavier due to added protection.
Current CapacityHigh-load applications (AC compressors)Industry Standard: 30A (ASTM D3232)
Our Base: 40A (▲ IEC 60947-5-1)
Our Advanced: 40A + thermal protection (▲ EN 60947-5-1)		Handles heavy loads without overheating.
Advanced: Auto-shuts off if overheated.		Heavier than lower-current relays.
Advanced: Requires more installation space.
Material DurabilityHarsh environments (vibration/moisture)Industry Standard: Basic plastic (ASTM D638)
Our Base: Reinforced nylon (▲ ASTM D412)
Our Advanced: Metal-reinforced base (▲ ISO 16750-3)		Resists corrosion and mechanical stress.
Advanced: Withstands extreme temperatures (-40°C to 85°C).		Higher cost than standard materials.
Advanced: Heavier, may affect vehicle weight balance.
CertificationsGlobal automotive marketsIndustry Standard: CE (EU)
Our Base: CE + ISO 16750-2
Our Advanced: CE, ISO 16750-2, and UL 508 (▲)		Meets EU safety standards.
Advanced: Compatible with North American and global markets.		Advanced certifications may delay production.
Higher compliance costs.
Design & MountingSpace-constrained compartmentsIndustry Standard: Standard rectangular design (SAE J1171)
Our Base: Compact profile (≤50mm height)
Our Advanced: Flange mounting (▲ ISO 228-1)		Fits tight spaces.
Advanced: Secures firmly to vehicle chassis.		Custom mounting may require adapters.
Advanced: Requires specialized tools for installation.
Customization OptionsOEM installations for specific modelsIndustry Standard: Universal fit (no model-specific options)
Our Base: 50+ model fits (▲ ISO 3833)
Our Advanced: 100+ model fits + OEM labeling (▲)		Tailored for specific vehicles (e.g., Peugeot 308, Nissan Sentra).
Advanced: OEM branding for seamless integration.		Customization adds cost and lead time.
Advanced: Requires precise model matching.

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