Auto Relay NT76-A-Z-5VDC

Product Overview

The NT76-A-Z-5VDC Auto Relay is a miniature, high-sensitivity double-pole double-throw (DPDT) relay designed for 5V DC control systems. With an ultra-low coil power consumption of just 0.3–0.43W, it provides reliable switching for automotive electronics, industrial control panels, battery management systems, and IoT devices. As part of YM's comprehensive relay family—which includes Automotive Relay, PCB Board Relay, Metal Sealing Relay, Industrial Power Relay, and Solid State Relay—the NT76 series delivers consistent contact performance, fast response, and excellent environmental sealing for demanding low-voltage applications.

Technical Specifications

• Model: NT76-A-Z-5VDC (DPDT configuration)
• Coil Voltage: 5V DC
• Coil Power Consumption: 0.3 – 0.43 W (typical 0.36W)
• 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 (hermetic option available)
• Operating Temperature: -40°C to +85°C

All specifications validated at 25°C. Ideal for 5V logic-level drive circuits.

Product Features & Competitive Advantages

1. 5V Low-Voltage Coil: Directly compatible with 5V TTL/CMOS logic, microcontrollers, and Arduino-style boards – no additional driver required.
2. DPDT (2C) Configuration: Provides two independent changeover contact sets, enabling control of two separate loads or signal routing from a single relay.
3. Ultra-Low Power Consumption: Consumes only 0.3–0.43W, minimizing heat generation and enabling battery-powered operation.
4. Fast Switching Speed: ≤4ms operate/release time ensures real-time response for safety interlocks and high-speed control loops.
5. Excellent Contact Stability: Maintains low and stable contact resistance throughout 100,000+ operations, critical for low-level signal switching.
6. Hermetic Sealing Option: Leakage rate ≤10⁻³ Pa·cm³/s protects against moisture, dust, and corrosive gases – suitable for automotive under-hood and outdoor installations.

Installation & Wiring Steps

1. Pin Configuration Verification: Identify coil terminals (typically pins 1 and 10 or as per datasheet) and contact terminals (common, NC, NO for each pole).
2. PCB Mounting: Insert relay into pre-drilled PCB holes. Ensure correct orientation (marked by polarity dot or notch). Solder at ≤350°C for ≤3 seconds per pin.
3. Coil Connection: Apply 5V DC to the coil terminals. Do not exceed 5.5V (10% tolerance). Reverse polarity is acceptable for non-polarized coil.
4. Load Wiring: Connect loads to COM/NC/NO terminals as required. For DPDT, each pole can control independent circuits (e.g., one for a pump, one for a warning light).
5. Functional Test: Energize coil and verify continuity between COM and NO; de-energize and verify continuity between COM and NC. Measure contact resistance (<50mΩ).
6. Integration with Sensors: For automated control, pair with Military Pressure Sensor or Aviation Haulage Pressure Sensor for pressure-based switching.

Application Scenarios

The NT76-A-Z-5VDC relay is widely used in low-voltage electronic systems:

• Automotive Electronics: 5V-controlled headlight leveling, horn relay (compatible with Military Electronic Horn), cooling fan logic, and power window circuits in aftermarket modules.
• Industrial Automation: PLC output expansion, conveyor interlocking, and control of Aviation Cold Air Solenoid Valve in pneumatic systems.
• Battery Management Systems (BMS): Cell balancing, protection circuit switching, and load disconnection in lithium battery packs.
• Renewable Energy: Solar charge controller logic, inverter standby switching, and DC load shedding.
• Consumer Electronics & IoT: Smart home controllers, security systems, and robotic control boards.

Value Proposition for B2B Buyers

• Enhanced System Reliability: 100,000-cycle electrical life and stable contact resistance reduce field failures and warranty claims.
• Direct 5V Logic Drive: Eliminates need for level shifters or transistor drivers, simplifying PCB design and BOM.
• Energy-Efficient Design: Low coil power (0.3–0.43W) minimizes heat dissipation and extends battery life in portable devices.
• Global Compliance: Manufactured under ISO 9001:2015 with RoHS and REACH compliance, supporting international export.
• Cost-Effective Customization: Low MOQ for custom coil voltages, contact materials, and packaging – ideal for OEM programs.

Certifications & Compliance

The NT76-A-Z-5VDC 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 (compliant design)

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 NT76 series to meet specific application requirements:

• Coil Voltage: 3V, 5V (standard), 12V, 24V 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 (standard), quick-connect tabs, or wire leads.
• 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.