Auto Relay NT75 2C DC24V 0.41W

Product Overview

The NT75 2C DC24V 0.41W Auto Relay is a high-performance, double-pole double-throw (DPDT) relay designed for demanding automotive, commercial vehicle, and industrial control applications. With a low coil power consumption of just 0.41W at 24V DC, it provides reliable switching for loads up to 1A at 28V DC, making it ideal for electronic control units (ECUs), lighting systems, and auxiliary equipment. As part of YM's extensive relay family—which includes Automotive Relay, PCB Board Relay, Industrial Power Relay, Military Metal Relay, and Solid State Relay—the NT75 2C delivers proven durability, fast response, and excellent contact stability for mission-critical circuits.

Technical Specifications

• Model: NT75 2C DC24V 0.41W (DPDT configuration)
• Coil Voltage: 24V DC
• Coil Power Consumption: 0.41W (typical) – 0.3 to 0.43W range
• Contact Arrangement: 2C (two form C, double-pole double-throw)
• Contact Load (Resistive): 1A at 28V DC, 100,000 operations minimum
• Low-Level Signal Capability: (10-50)μA at (10-50)mV for 100,000 cycles
• Contact Resistance: Initial ≤50mΩ; after life test ≤200mΩ
• Operate Time: ≤4ms (typical ≤3ms)
• Release Time: ≤4ms
• Incentive Pulse Width: 10–50 ms
• Dielectric Strength (Normal Pressure): 500V RMS @ 50Hz
• Dielectric Strength (Low Pressure): 250V RMS @ 50Hz
• Insulation Resistance (Standard): >500 MΩ
• Insulation Resistance (After Life): >50 MΩ
• Weight: <3 grams
• Sealing Performance: Maximum leakage rate ≤1.0 × 10⁻³ Pa·cm³/s
• Operating Temperature: -40°C to +85°C

All specifications validated at 25°C. Custom coil voltages and contact materials available.

Product Features & Competitive Advantages

1. Ultra-Low Coil Power (0.41W): Reduces heat generation and enables direct drive from logic circuits (microcontrollers, PLCs) without additional drivers – ideal for energy-efficient designs.
2. DPDT (2C) Configuration: Provides two independent changeover contact sets, allowing control of two separate circuits or load types from a single relay.
3. Fast Switching Speed: ≤4ms operate/release time ensures real-time response for safety interlocks, lighting control, and solenoid drivers.
4. High Contact Stability: Maintains low contact resistance throughout 100,000+ operations, critical for low-level signal switching in sensor circuits.
5. Hermetic Sealing Option: Leakage rate ≤10⁻³ Pa·cm³/s protects contacts from dust, moisture, and corrosive atmospheres – suitable for under-hood and outdoor installations.
6. Versatile Compatibility: Works seamlessly with other YM components such as Aviation Microswitch, Hydraulic Circuit Breaker, and Aviation Temperature Sensor in integrated systems.

Installation & Wiring Steps

1. Pin Identification: Refer to the datasheet: coil terminals (typically pins 1 and 2), common (COM), normally closed (NC), and normally open (NO) for each of the two poles (pins 3-8).
2. PCB Mounting (through-hole): Insert relay into pre-drilled PCB holes. Ensure correct orientation (usually marked by a dot or notch). Solder at ≤350°C for ≤3 seconds per pin.
3. Socket Mounting (optional): Use a standard relay socket (e.g., 8-pin octal or mini relay socket) for plug-and-play replacement.
4. Coil Connection: Apply 24V DC to the coil terminals. Do not exceed 26.4V (10% tolerance).
5. Load Wiring: Connect the load circuit to the appropriate COM/NC/NO terminals. For 2C, each pole can control independent loads (e.g., one for a motor, one for a warning light).
6. Functional Test: Energize the coil and verify continuity between COM and NO; de-energize and verify continuity between COM and NC. Measure contact resistance to confirm ≤50mΩ.
7. Integration with Sensors: For automated control, combine with Military Pressure Sensor or Aviation Haulage Pressure Sensor for pressure-based switching.

Application Scenarios

The NT75 2C relay is deployed across automotive, industrial, and renewable energy applications:

• Automotive Electronics: Headlight high/low beam switching, horn control (compatible with Military Electronic Horn), cooling fan relays, and window lift circuits.
• Commercial Vehicles (Trucks, Buses): 24V system control for auxiliary lights, air conditioning clutches, and diagnostic interfaces.
• Industrial Automation: PLC output expansion, conveyor system interlocking, and control of Aviation Cold Air Solenoid Valve in pneumatic systems.
• Renewable Energy: Solar inverter control, battery management system (BMS) logic switching, and DC load shedding.
• Rail & Transit: Door control circuits, lighting contactors, and signaling interfaces.
• Off-Highway Equipment: Agricultural machinery, construction equipment, and Hydraulic Circuit Breaker control panels.

Value Proposition for B2B Buyers

• Enhanced System Reliability: 100,000-cycle electrical life and stable contact resistance reduce field failures and warranty claims.
• Energy-Efficient Design: 0.41W coil consumption lowers total power budget in battery-powered or 24V vehicle systems.
• Simplified PCB Design: Standard footprint and pinout allow easy integration with existing PCB Board Relay and Automotive Relay layouts.
• Global Compliance: Manufactured under ISO 9001:2015 with CE and RoHS compliance, supporting your export requirements.
• Cost-Effective Customization: Low MOQ for custom coil voltages, contact materials, and packaging – ideal for OEM programs.

Certifications & Compliance

The NT75 2C relay is designed and manufactured to meet international standards for automotive and industrial relays. Our facility operates under ISO 9001:2015 quality management. Key compliance includes:

• IEC 61810-1 – Electromechanical elementary relays
• RoHS 2011/65/EU – Restriction of hazardous substances
• REACH (EC 1907/2006) – Chemical compliance
• ISO 16750 – Road vehicles – Environmental conditions (pending)

Each relay is 100% tested for coil resistance, pickup/dropout voltage, contact resistance, and dielectric strength. Traceability codes are laser-marked on the housing.

Customization Options

YM offers extensive OEM/ODM customization for the NT75 series to meet specific application requirements:

• Coil Voltage: 12V DC, 24V DC (standard), 48V DC, or custom AC coils.
• Contact Material: Silver alloy (standard), gold-plated (low-level signal), or silver-tin oxide (high inrush).
• Sealing Level: Flux-tight (standard), washable, or hermetic sealing (≤10⁻³ Pa·cm³/s).
• Terminal Style: PCB pins, quick-connect tabs, or screw terminals.
• Special Markings: Private labeling, custom part numbers, and bulk/tube packaging.
• Enhanced Environmental Protection: Conformal coating for high-humidity or vibration-prone environments.

Production Process & Quality Assurance

1. Incoming Material Inspection: Coil wire, contact metals, and plastic housings are certified and sampled for compliance.
2. Precision Coil Winding: Automated winding ensures consistent resistance (±5%) and insulation integrity.
3. Contact & Armature Assembly: Clean-room assembly of moving and stationary contacts, spring, and armature.
4. Calibration: Pickup/dropout voltage and contact follow are adjusted to datasheet limits.
5. 100% Functional Testing: Every relay undergoes coil resistance, operate/release time, contact resistance, and dielectric strength (500V RMS) testing.
6. Life Cycle Sampling: Statistical sampling for electrical life (100,000 ops at rated load) and mechanical life (10 million ops).
7. Sealing Test (Hermetic versions): Helium mass spectrometry verifies leakage rate ≤10⁻³ Pa·cm³/s.
8. Final Visual & Packaging: Laser marking of model, date code, and lot number. Packaged in anti-static tubes or tape-and-reel for automated assembly.