High Power Relay NT90THAE12CB 40A

Product Overview

The NT90TH series high voltage relays (including models NT90THAE12CB 30A/40A DC12V, NT90THBDDC110VC 0.9W DC110V, and NT90TNLCSDC220SB 0.6W DC220V) are designed for demanding switching applications in industrial automation, power distribution, renewable energy, and heavy machinery. These relays feature SPST-NO (1 Form A) contacts rated up to 40A at 28V DC / 250V AC, with coil voltages from 12V DC to 220V DC and ultra-low power consumption (0.6W–0.9W). As part of YM's extensive relay portfolio—which includes Industrial Power Relay, Metal Sealing Relay, PCB Board Relay, Automotive Relay, and Solid State Relay—the NT90TH series delivers robust performance, high dielectric strength (4,000V RMS), and long electrical life for mission-critical circuits.

Technical Specifications

The NT90TH series is available in multiple coil voltage and current rating variants. Key parameters:

• Available Models & Coil Data:
  • NT90THAE12CB: 12V DC coil, 0.6W (approx.), 30A or 40A contact rating
  • NT90THBDDC110VC: 110V DC coil, 0.9W, 30A contact rating
  • NT90TNLCSDC220SB: 220V DC coil, 0.6W, 30A contact rating
• Contact Configuration: SPST-NO (1 Form A) normally open
• Contact Rating (Resistive): 30A / 40A at 28V DC or 250V AC (depending on model)
• 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: ≤15ms (typical ≤10ms)
• Release Time: ≤10ms
• Dielectric Strength (Coil to Contacts): 4,000V RMS (high voltage isolation)
• Insulation Resistance: >500 MΩ (500V DC)
• Mechanical Life: 10 million operations minimum
• Electrical Life: 100,000 operations at rated load
• Operating Temperature: -40°C to +85°C
• Weight: Approx. 28–32 grams
• Sealing: Flux-tight standard; hermetic sealing optional (leakage ≤1.0×10⁻³ Pa·cm³/s)

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

Product Features & Competitive Advantages

1. High Current Rating (30A/40A): Suitable for heavy loads such as motors, heaters, compressors, and battery banks – reduces the need for multiple parallel relays.
2. Wide DC Coil Range (12V–220V): Direct compatibility with industrial control systems, PLC outputs, and battery-powered equipment without additional power conversion.
3. Ultra-Low Coil Power (0.6W–0.9W): Minimizes heat generation and enables direct drive from logic circuits (microcontrollers, timers).
4. High Dielectric Strength (4,000V RMS): Ensures safe isolation between control and load circuits, critical for high-voltage applications like solar inverters and power supplies.
5. Long Electrical & Mechanical Life: 100,000 electrical cycles at rated load and 10 million mechanical cycles reduce maintenance and replacement costs.
6. PCB Mount Design: Standard footprint allows seamless integration with PCB Board Relay layouts, saving board space and simplifying assembly.

Installation & Wiring Steps

1. Model Selection: Verify coil voltage (12V, 110V, or 220V DC) and contact current rating (30A or 40A) against your system requirements.
2. PCB Mounting: Insert relay into pre-drilled PCB holes according to the pinout diagram (refer to datasheet). Ensure correct orientation (marked by polarity notch). Solder at ≤350°C for ≤3 seconds per pin.
3. Coil Connection: Connect the coil terminals to the appropriate DC control voltage. Observe polarity if a suppression diode is integrated (check datasheet).
4. Load Wiring: Connect the power source to the input terminal (common) and the load to the normally open (NO) terminal. Use wire gauge suitable for 30A/40A (minimum 10 AWG).
5. Functional Test: Apply coil voltage – verify continuity (low resistance) between input and NO terminals. Remove voltage – verify open circuit (infinite resistance).
6. Integration with Sensors: For automated protection, pair with Aviation Temperature Sensor, Hydraulic Circuit Breaker, or Military Pressure Sensor for temperature/pressure-based cut-off.

Application Scenarios

The NT90TH series relays are deployed in high-power DC and AC switching applications:

• Industrial Automation: Motor contactors, conveyor systems, solenoid valve drivers (compatible with Aviation Cold Air Solenoid Valve), and heating element switching.
• Renewable Energy: Solar charge controller load disconnect, battery bank isolation, wind turbine brake control, and energy storage systems.
• Power Distribution & UPS: Emergency power transfer, inverter bypass relays, and DC distribution panels.
• Automotive & Heavy Equipment: High-power lighting, winch control, auxiliary battery isolators, and electric vehicle charging stations.
• HVAC & Refrigeration: Compressor start relays, fan speed control, and defrost heater switching.
• Test & Measurement: Load switching for power supplies, electronic loads, and automated test equipment.

Value Proposition for B2B Buyers

• Enhanced System Safety: High interrupting capacity and 4,000V isolation reduce arc flash risk and protect sensitive control circuits.
• Longer Operational Life: 100,000-cycle electrical life lowers total cost of ownership and reduces downtime.
• Energy-Efficient Coil: Low power consumption (0.6W–0.9W) minimizes heat and allows direct logic control without external drivers.
• Global Compliance: Manufactured under ISO 9001:2015, RoHS, REACH; UL and TUV certifications available upon request.
• Flexible Customization: YM offers custom coil voltages, contact materials (AgSnO₂, AgCdO), sealing levels, and terminal styles for OEM projects.

Certifications & Compliance

The NT90TH series relays are designed to meet international standards for industrial power relays. Our facility operates under ISO 9001:2015 quality management. Key compliance includes:

• IEC 61810-1 – Electromechanical elementary relays
• UL 508 – Industrial control equipment (selected models)
• TUV EN 61810-1 – Safety standard (available on request)
• RoHS 2011/65/EU – Restriction of hazardous substances
• REACH (EC 1907/2006) – Chemical compliance

Each relay is 100% tested for coil resistance, pickup/dropout voltage, contact resistance (≤50mΩ), dielectric strength (4,000V RMS), and insulation resistance. Traceability codes are laser-marked on the housing.

Customization Options

YM provides extensive OEM/ODM customization for the NT90TH series to meet specific application requirements:

• Coil Voltage: Custom DC voltages (6V, 24V, 48V, 110V, 220V, etc.) or AC coils.
• Contact Material: Silver-tin oxide (standard for high current), silver-cadmium oxide (inductive loads), or gold-plated (low-level signals).
• Current Rating: Up to 50A available with enlarged contacts.
• Sealing Level: Flux-tight (standard), washable, or hermetic sealing (≤10⁻³ Pa·cm³/s).
• Terminal Style: PCB pins, quick-connect tabs (6.3mm), or screw terminals.
• Special Markings: Private labeling, custom part numbers, and bulk/tube packaging.

Production Process & Quality Assurance

1. Incoming Material Inspection: Coil wire, contact metals, cores, and housings are certified and sampled for compliance.
2. Precision Coil Winding: Automated winding ensures consistent resistance (±5%) and insulation integrity.
3. Contact & Armature Assembly: High-precision assembly of moving and stationary contacts, springs, and armatures in clean-room environment.
4. Calibration: Pickup/dropout voltage and contact follow are set to datasheet limits using automated test equipment.
5. 100% Functional Testing: Every relay undergoes coil resistance, operate/release time, contact resistance, dielectric strength (4,000V RMS), and insulation resistance 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 bulk boxes for automated assembly.