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quality NER03-40 40A High Voltage AC Relay 750V Breaking Magnetic Arc Extinguishing Custom ODM Solution factory
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quality NER03-40 40A High Voltage AC Relay 750V Breaking Magnetic Arc Extinguishing Custom ODM Solution factory
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NER03-40 40A High Voltage AC Relay 750V Breaking Magnetic Arc Extinguishing Custom ODM Solution

Product Summary

40A high voltage AC relay with 750V breaking capability, magnetic arc extinguishing design and surge-resistant contacts, backed by custom ODM co-development engineering support.

Product Custom Attributes

Contact Rating:
40A
Breaking Capacity:
750V
Contact Configuration:
2A1B
Environmental Protection Category:
RT-II
Dielectric Strength:
>=4000VAC (high-low Voltage)
Arc Extinguishing:
Magnetic Arc Extinguishing Design
Surge Withstand:
Enhanced Surge Resistance And Current Withstand
Polarity:
Non-polarized Load And Coil Connections
Compliance:
RoHS Compliant
Operating Temperature:
-40 To +85 C
Enclosure:
Dust-proof Cover
Termination:
PCB And Quick-connect Terminals
Highlight:

40A High Voltage AC Relay

,

750V Magnetic Arc Extinguishing Design

,

Custom ODM Co-Development Engineering Support

Design Now

Basic Properties

Place of Origin:
Shenzhen, Guangdong, China
Brand Name:
Rocfly
Certification:
ISO 9001:2015, CQC, CE, RoHS
Model Number:
NER03-40-2A1BF (G30)

Trading Properties

Packaging Details:
Export-grade corrugated carton with foam partition, 100 pieces per carton
Delivery Time:
3 working days for stock, 15-25 days for production
Payment Terms:
T/T,L/C,PayPal
Supply Ability:
100000 Pieces per Month

Product Description

NER03-40 40A High Voltage AC Relay (750V Breaking)

The NER03-40 is a 40A high voltage AC relay engineered for new energy applications, featuring a magnetic arc extinguishing design with 750V breaking capability and surge-resistant contacts.

Product Features

  • Magnetic arc extinguishing design with 750V breaking capability
  • Unique contact structure for enhanced surge resistance and current withstand
  • 4000V+ dielectric strength between high and low voltage
  • Non-polarized load and coil connections
  • RT-II environmental protection category
  • RoHS compliant

Custom ODM Co-Development Engineering Solutions

We are more than a relay supplier. Our engineering team co-develops solutions and products together with you from concept to mass production. Contact configuration, coil voltage, terminal type, enclosure and load ratings can all be customized to your exact application.

  • Rapid prototyping and sample verification
  • Dedicated engineering support from schematic design to production
  • Custom PCBA and relay module integration
  • In-house tooling and automated production lines

Why Partner With Us

  • Save time - one-stop design, prototyping and production
  • Save effort - a single point of contact across the whole engineering cycle
  • Save cost - competitive pricing through in-house manufacturing

Applications

New energy vehicles, EV charging stations, energy storage systems, photovoltaic inverters, industrial motor control and smart grid equipment.

Overall Rating
5.0
★★★★★
★★★★★
Based on 50 reviews recently
5 star
100%
4 star
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3 star
0
2 star
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All Reviews
  • K
    kevin
    Indonesia Jul 27.2026
    ★★★★★
    ★★★★★
    Solid board layout, stable firmware, and easy to fit into our housing.
  • W
    williams
    United States Jul 20.2026
    ★★★★★
    ★★★★★
    These 12V smart jumper clamps work very well with our emergency jump starters. The anti-reverse connection and multiple safety protections give users more confidence, and the build quality is solid.
  • K
    Kemal
    Mexico Jul 20.2026
    ★★★★★
    ★★★★★
    We partnered with them for a 10kWh home energy storage system, and the result was excellent. The stackable design, custom OEM support, and BOM optimization helped us launch a reliable product faster and within budget.

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