Automotive Relay NVF4-2C-Z30a 12V 40A 30A

Product Overview

The NVF4-2C-Z30a is a high-capacity Automotive Relay engineered for demanding 12V vehicle electrical systems. Available in 4-pin or 5-pin DPST configurations, this relay delivers robust switching performance with 40A and 30A contact ratings, making it ideal for headlamps, cooling fans, fuel pumps, and other high-current loads. The NVF4-2C-Z30a features a low coil power consumption of just 0.3~0.43W, fast switching (≤4ms), and excellent dielectric strength (500Vrms). As part of YM’s extensive relay family – including Metal Sealing Relay, Polarized Relay, Latching Relay, PCB Board Relay, and New Energy Relay – this relay is built to withstand harsh under-hood environments while providing long electrical life.

Technical Specifications

Coil Parameters (12V DC)

• Coil power consumption: (0.3~0.43)W – ultra-low for an automotive power relay
• Nominal coil voltage: 12V DC
• Pick-up voltage: ≤8.4V DC
• Drop-out voltage: ≥1.2V DC
• Incentive pulse width (for latching version, if applicable): (10~50) ms – refer to ordering guide

Contact Ratings (DPST – 2 Form A)

• High capacity switching: 40A at 14V DC (resistive) / 30A at 14V DC (motor/lamp load)
• Low level switching capability: (10~50)μA, (10~50)mV – 1×10⁵ operations, suitable for signal-level circuits
• Resistive load rating (reference): 1A, 28V DC, 1×10⁵ operations
• Initial contact resistance: ≤50mΩ; after life test ≤200mΩ

Timing & Isolation

• Action time (operate): ≤4ms
• 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 – extremely lightweight for automotive harness mounting
• Sealing (leakage rate): ≤10⁻³ Pa·cm³/s (hermetic construction available)
• Temperature range: -40°C to +85°C
• Wire coil specifications (at 25°C): Refer to detailed coil voltage vs. resistance chart in datasheet

All parameters are validated under 25°C ambient. The NVF4-2C-Z30a meets or exceeds typical automotive OEM requirements for vibration, shock, and thermal cycling.

Product Images & Visuals

Above: NVF4-2C-Z30a relay shown in 4-pin DPST configuration (5-pin version also available). Contact YM for dimensional outline and PCB footprint drawing.

Key Features & Advantages

• Dual current rating (40A / 30A): One relay can switch two different load circuits – perfect for dual-headlamp systems (high/low beam) or fan speed control.
• Ultra-low coil power (0.3~0.43W): Minimizes heat buildup and allows direct drive from automotive ECUs without external coil drivers – improves overall system efficiency.
• Fast switching response (≤4ms): Enables precise timing for pulsed loads such as turn signals, hazard lights, and LED modulation.
• High dielectric & insulation strength: 500Vrms withstand and >500MΩ insulation ensure safety in 12V/24V electrical systems and protect against voltage transients.
• Hermetic sealing option (≤10⁻³ Pa·cm³/s): Prevents contact oxidation and corrosion in high-humidity, salt-spray, or dusty environments – ideal for off-road and marine vehicles.
• Flexible pin count (4 or 5 pins): 4-pin DPST for basic on/off of two loads; 5-pin adds an auxiliary contact or coil monitoring terminal for diagnostic feedback.

YM’s engineering advantage: The NVF4-2C-Z30a shares core magnetic circuit technology with our Polarized Relay and Latching Relay families, resulting in consistent contact force and minimal bounce. Compared to standard ISO mini relays, this high-capacity relay reduces component count and wiring complexity when switching two independent high-current loads.

For applications requiring even higher endurance, YM also offers Military Metal Relay and Industrial Power Relay solutions. The NVF4 series complements our Automotive Relay lineup alongside Flash Relay and PCB Signal Relay products.

How to Use the NVF4-2C-Z30a – Step by Step

1. Identify terminal assignment: For DPST 4-pin version: terminals 85 & 86 are coil (+/-); terminals 87 & 87a (or 30 & 87) are the two normally-open load contacts. For 5-pin version, the extra pin (e.g., 87b) may be a center tap or diagnostic output – verify with the datasheet.
2. Mounting & connection: The relay is designed for plug-in socket (ISO 280-style) or direct PCB soldering. Ensure wire gauge supports 40A (min 8 AWG for load wires).
3. Coil drive: Apply 12V DC across coil pins (85+ / 86-). The relay operates when voltage exceeds 8.4V. Do not exceed 16V continuously. For inductive loads, add a flyback diode across the coil.
4. Load wiring: Connect your two independent loads (e.g., left and right headlamps) to the two NO contact terminals. When energized, both loads are switched simultaneously.
5. Protection against arcing: For capacitive or incandescent lamp loads (high inrush), a series NTC thermistor or parallel snubber across each contact is recommended to prolong contact life.
6. Testing: After installation, measure voltage drop across each closed contact – should be <100mV at rated current. Verify insulation resistance >10MΩ when coil is de-energized.

Pro tip: Because the NVF4-2C-Z30a consumes only 0.43W max, it can be driven directly by many microcontroller GPIOs via a small NPN transistor – ideal for smart automotive modules.

Application Scenarios & Key Benefits for Buyers

Typical Vehicle & Equipment Uses

• Automotive lighting systems: Dual headlamp (low/high beam) control, fog lamps, DRLs – DPST switches both sides with a single relay, reducing fuse box size.
• Engine cooling fans (dual-speed or twin fans): One relay for low-speed resistor bypass, another for high-speed direct – but two independent contacts can also be used for separate fan motors.
• Electric winches & auxiliary equipment: 40A rating handles stall current of small winches, air compressors, and hydraulic pumps.
• Caravans / RVs / boats: Battery isolator, inverter transfer switching, and lighting circuits benefit from the relay's low coil power and hermetic sealing option.
• Commercial vehicles (trucks, buses): 24V version available – contact YM for custom coil voltages.

Direct Value to International OEMs & Aftermarket Buyers

• Cost reduction: Replaces two single-pole relays and associated wiring – lower BOM and assembly time. The DPST design cuts PCB footprint by nearly 50%.
• Improved reliability: Fewer interconnections mean reduced failure points. The NVF4's sealed construction prevents contact contamination, lowering field return rates.
• Energy savings: 0.3-0.43W coil power reduces parasitic draw – especially important for electric vehicles (EVs) and battery-powered equipment.
• Global compliance: RoHS/REACH compliant, with IATF 16949 manufacturing – simplifies your supply chain audits.

For new energy applications, the NVF4-2C-Z30a can be paired with YM’s New Energy Relay and Solid State Relay families to build compact power distribution units (PDUs) for EVs and charging stations.

Certifications & Compliance

• IATF 16949:2016 certified production facility (automotive quality management).
• RoHS 2011/65/EU & REACH (EC 1907/2006) compliant – full material declaration available.
• ISO 7637-2 transient immunity – suitable for 12V vehicle electrical systems.
• UL recognized component (pending file number – contact YM for latest status).
• Flammability rating: UL 94 V-0 for relay housing and bobbin material.

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

Customization Options

YM understands that different vehicle platforms and aftermarket applications require tailored solutions. For volume orders, the NVF4-2C-Z30a can be customized as follows:

• Coil voltage variants: 6V, 24V, 48V DC, or custom values (e.g., 9V, 18V) with optimized coil resistance.
• Contact material upgrades: AgSnO₂ (for DC motor/inductive loads) or AgNi+Au (for low-level signal switching).
• Terminal finish: Tin (standard), silver, or gold plating for improved solderability and corrosion resistance.
• Sealing level: Standard flux-tight, washable (with plastic cover), or fully hermetic (glass-to-metal seal) for extreme environments (IP67 equivalent).
• Pin configuration & marking: Custom pin lengths, bent terminals, or laser engraving of your part number and logo.

Our engineering team provides pre-production samples of custom variants 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 and traceability systems.

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

With over a decade of experience in Automotive Relay and PCB Board Relay manufacturing, YM combines lean production methods with German test standards. The NVF4-2C-Z30a is built to deliver consistent performance under the most demanding vehicle conditions.