Automotive Relay NVF4-4aA-S80a DPST 5Pins

Product Overview

The NVF4-4aA-S80a is a high-performance Automotive Relay designed for demanding 12V vehicle systems requiring robust switching up to 80A. Featuring a DPST (5-pin) configuration, this relay offers two independent normally-open contacts, ideal for simultaneously controlling dual high-current loads such as headlamps, cooling fans, and electric winches. With ultra-low coil power consumption (0.3~0.43W), fast operate/release time (≤4ms), and excellent dielectric strength (500Vrms), the NVF4-4aA-S80a delivers reliable operation under extreme temperatures and vibration. As part of YM’s comprehensive relay portfolio – including Metal Sealing Relay, Polarized Relay, Latching Relay, PCB Board Relay, and New Energy Relay – this relay is manufactured to automotive-grade standards, ensuring long electrical life and consistent performance.

Technical Specifications

Coil Parameters (12V DC)

• Coil power consumption: (0.3~0.43)W – ultra-low for high-current automotive relays
• Nominal coil voltage: 12V DC (24V version available on request)
• Pick-up voltage: ≤8.4V DC
• Drop-out voltage: ≥1.2V DC
• Incentive pulse width (if latching version): (10~50) ms – consult ordering guide

Contact Ratings (DPST – 2 Form A, 5 pins)

• High current switching: 80A at 14V DC (resistive load) / 50A at 14V DC (motor/lamp load) – based on NVF4 series design
• Low level switching capability: (10~50)μA, (10~50)mV – 1×10⁵ operations, suitable for signal-level circuits
• Reference resistive load: 1A, 28V DC, 1×10⁵ operations
• Initial contact resistance: ≤50mΩ; after life test ≤200mΩ

Timing & Isolation

• Action time (operate): ≤4ms (typical ≤3ms)
• Release time: ≤4ms
• Dielectric strength (normal atmosphere): 500Vr.m.s., 50Hz; under low pressure: 250Vr.m.s., 50Hz
• Insulation resistance (normal atmosphere): >500MΩ; after high-level life test: >50MΩ

Mechanical & Environmental

• Weight: <3g – lightweight for PCB or socket mounting
• Sealing (leakage rate): ≤10⁻³ Pa·cm³/s (hermetic construction available)
• Operating temperature range: -40°C to +85°C
• Wire coil specifications (at 25°C): Coil resistance approx. 260Ω for 12V version – refer to datasheet for exact values

All parameters are validated at 25°C ambient. The NVF4-4aA-S80a meets automotive industry standards for shock, vibration, and thermal cycling.

Product Images & Visuals

Above: NVF4 series relay (NVF4-4aA-S80a shown). The 5-pin DPST configuration provides two independent load terminals plus a common terminal. Contact YM for detailed dimensional drawings and 3D models.

Key Features & Advantages

• 80A high-current DPST switching: Simultaneously controls two separate high-power circuits (e.g., dual headlamps, twin cooling fans) with a single relay – reduces component count and wiring complexity.
• Ultra-low coil power (0.3~0.43W): Minimizes heat generation and allows direct drive from automotive ECUs, microcontrollers, or low-power switches – ideal for electric vehicles and battery-sensitive systems.
• Fast response (≤4ms operate/release): Enables precise timing for pulsed loads such as turn signals, LED modulation, and motor reversing contactors.
• High dielectric strength & insulation: 500Vrms withstand and >500MΩ insulation ensure safety against voltage transients (ISO 7637-2 compliant).
• Hermetic sealing option (≤10⁻³ Pa·cm³/s): Protects contacts from dust, moisture, and salt spray – extends relay life in under-hood, marine, or off-road environments.
• 5-pin DPST configuration: Includes two coil pins, two independent NO load pins, and one common pin – provides flexibility for load sharing or diagnostic monitoring.

YM engineering advantage: The NVF4-4aA-S80a leverages magnetic circuit technology from our Polarized Relay and Latching Relay families, ensuring consistent contact force and minimal bounce. Compared to standard ISO relays, this high-capacity DPST design reduces PCB space by 40% and simplifies high-current routing. For even more demanding applications, YM offers Military Metal Relay and Industrial Power Relay solutions.

This relay is fully compatible with our Automotive Relay lineup, including Flash Relay and PCB Signal Relay families, enabling a complete vehicle power distribution solution.

How to Use the NVF4-4aA-S80a – Step by Step

1. Identify pinout: For the 5-pin DPST version: pins 85 and 86 are the coil (+/-). Pin 30 is the common input (battery positive). Pins 87 and 87a are the two normally-open outputs (load 1 and load 2). Verify polarity if a suppression diode is integrated.
2. Mounting: The relay is designed for ISO 280-style sockets or direct PCB soldering. For high-current applications (≥50A), use a relay socket with 6.3mm quick-connect terminals or solder directly to a PCB with adequate copper thickness.
3. Coil drive: Apply 12V DC to coil pins (85+ / 86-). The relay will energize when voltage exceeds 8.4V. Do not exceed 16V continuously. For inductive coil protection, add a flyback diode across the coil (if not already internal).
4. Load wiring: Connect the battery positive to pin 30 (common). Connect your two loads (e.g., left headlamp and right headlamp) to pins 87 and 87a. Both loads will be switched simultaneously when the coil is energized.
5. Arc suppression: For capacitive or incandescent loads, install a series NTC thermistor or a parallel RC snubber across each contact to reduce inrush current and prolong contact life.
6. Testing: After installation, measure voltage drop across each closed contact (87 and 87a) – should be <100mV at rated current. Verify insulation resistance >10MΩ when the coil is de-energized.

Pro tip: Because the NVF4-4aA-S80a consumes only 0.43W max, it can be driven directly by many automotive-grade GPIOs via a small N-channel MOSFET – perfect for smart junction boxes and body control modules (BCMs).

Application Scenarios & Key Buyer Benefits

Typical Vehicle & Heavy Equipment Uses

• Automotive lighting systems: Dual headlamp (high/low beam) control, fog lamps, LED light bars – DPST switches both sides simultaneously, reducing fuse box size and wiring harness weight.
• Engine cooling fans (dual-speed or twin fans): One relay for low-speed (via resistor) and another for high-speed – but two independent contacts can also drive two separate fan motors directly.
• Electric winches & hydraulic pumps: 80A rating handles stall current of small winches, air compressors, and plow hydraulic units.
• Recreational vehicles (RVs), boats, heavy trucks: Battery isolators, inverter transfer switching, and auxiliary lighting circuits benefit from the relay’s low coil power and hermetic sealing option.
• Commercial EVs (electric buses, forklifts): 24V version available – contact YM for custom coil voltages. Suitable for contactor replacement in low-voltage auxiliary systems.

Direct Value to International OEMs & Aftermarket Buyers

• Cost reduction: Replaces two single-pole relays and associated wiring – lowers BOM cost, assembly time, and warranty claims. The DPST design cuts PCB footprint nearly in half.
• Enhanced reliability: Fewer interconnections mean fewer failure points. The NVF4’s sealed construction prevents contact oxidation, ensuring stable contact resistance over 10⁵ electrical cycles.
• Energy efficiency: 0.3-0.43W coil power reduces parasitic draw – critical for battery-electric vehicles (BEVs) and hybrid systems where every milliwatt counts.
• Global compliance: RoHS/REACH compliant, IATF 16949 certified manufacturing – simplifies your supply chain audits and regulatory approvals.

For new energy applications (EV charging stations, solar battery storage), the NVF4-4aA-S80a can be paired with YM’s New Energy Relay and Solid State Relay families to build compact, high-efficiency power distribution units (PDUs).

Certifications & Compliance

• IATF 16949:2016 certified production facility – automotive quality management system.
• RoHS 2011/65/EU & REACH (EC 1907/2006) compliant – full material disclosure available.
• ISO 7637-2 transient immunity – suitable for 12V/24V vehicle electrical systems.
• UL recognized component (pending – contact YM for latest certification status).
• Flammability rating: UL 94 V-0 for relay housing and bobbin materials.
• Protection class: IP54 (standard), IP67 optional with hermetic sealing.

Each production batch undergoes AQL sampling per MIL-STD-105E, with 100% electrical testing: coil resistance, pick-up/drop-out voltage, contact voltage drop, and dielectric strength. Third-party test reports (TÜV, Intertek) are available on request.

Customization Options

YM offers extensive customization on the NVF4-4aA-S80a platform to meet specific OEM or aftermarket requirements. For volume orders, the following modifications are available:

• Coil voltage variants: 6V, 24V, 48V DC, or custom values (e.g., 9V, 18V) with optimized coil resistance and power consumption.
• Contact material upgrades: AgSnO₂ (for DC motor / lamp loads – reduces welding), AgNi+Au (for low-level signal switching), or AgCdO (legacy applications).
• Terminal finish: Tin (standard), 100% matte tin, silver, or gold plating for improved solderability and corrosion resistance.
• Sealing level: Standard flux-tight, washable (with plastic cover and drain holes), or fully hermetic (glass-to-metal seal, IP67/69K equivalent).
• Pin configuration & marking: Custom pin lengths, bent terminals (90° or straight), and laser engraving of your part number, logo, or QR code on the relay cover.
• Integrated suppression: Internal resistor or flyback diode across the coil – choose standard or custom clamping voltage.

Our engineering team provides pre-production samples of customized versions within 4-6 weeks. Minimum order quantities apply – please consult YM sales for details.

Production Process & Quality Assurance

YM’s automotive relay production line follows a fully automated, zero-defect philosophy, incorporating real-time SPC (Statistical Process Control) and full traceability.

• Incoming material control: 100% inspection of magnetic steel, copper wire, contact rivets, and plastic components – sourced from IATF 16949-certified suppliers.
• Coil winding & impregnation: Automatic winding with in-process resistance monitoring; vacuum varnish impregnation for moisture and vibration resistance.
• Contact assembly in Class 1000 cleanroom: Precision riveting and gap adjustment using vision-guided robotics – ensures low and stable contact resistance.
• Dynamic parameter tuning: Every relay is pulsed at nominal voltage to verify operate/release time, contact bounce (≤1ms), and contact voltage drop at 80A.
• Environmental stress screening (sample basis): Thermal shock (-40°C ↔ +125°C, 20 cycles), random vibration (10-500Hz, 5g), 96-hour salt spray (ASTM B117), and 1000-hour 85°C/85% RH humidity test.
• Traceability: Laser-etched date code and batch ID enable full traceability back to raw material certificates, production shift records, and test equipment calibration logs.

With over 15 years of experience in Automotive Relay and PCB Board Relay manufacturing, YM combines lean production methods with German test standards. The NVF4-4aA-S80a is built to deliver consistent performance under the most demanding vehicle conditions, from engine compartments to electric bus battery packs.