𐄀 Technology Connection to Future
Zhejiang Yonggui Electric Equipment Co., Ltd.

QB Circular Connectors

This series of products are mainly used in the cabinet box. This series of electrical connector adopts buckle connection, and the contact parts mainly adopt crimping structure, which has the advantages of quick connection and separation, vibration resistance, shock resistance, etc. It is widely used in railroad, aviation, industry, electronics and other fields.

Specifications of QB Circular Connectors

① Electrical parameters

Rated current

φ1:5 A, φ1.6:10A, φ2.4:23A
Rated voltageφ1:110 V AC, φ1.6:300V  AC, φ2.4:500V  AC
Withstanding voltageφ1:1500   V AC  50Hz  No breakdown or flashover within 1min.
φ1.6:2000 V AC 50Hz No breakdown or flashover within 1min.
φ2.4:2500 V AC 50Hz No breakdown or flashover within 1min.

Contact resistance

φ1:≤3mΩ, φ1.6:≤2.5mΩ, φ2.4:≤1.5mΩ
Insulation resistance≥2000 M

② Mechanical parameters

Mechanical life750 times


meet the vibration requirements of GB/T21563 in category 2

③ Other parameters

Operating temperature-55℃~+125℃
Relative humidity90%~95% (Temperature: 40±2℃)
Protection levelIP67 (with suitable tail accessories)
Environmental protectionRoHS


Aluminum alloy

Surface treatmentOxidized military green/nickel plated/oxidized black


Engineering plastic

Flame retardant ratingEN45545


Copper alloy

Surface treatmentgold/silver plated

Contact Yonggui Electric for Connectors
Contact Yonggui Electric for Connectors
We Can Provide
  • Customized Solutions

    Tailoring connectors to your unique needs.

  • Expert Technical Support

    Provide systemic solutions

  • Quick Response

    Respond to needs within 12 hours

Blog & News
Meet Yonggui at Future Mobility Asia 2024
We're excited to announce that Yonggui will be exhibiting at the 2024 Future Mobility Asia (FMA), taking place from May 15 -17 at the Queen Sirikit National Convention Center in Bangkok, Thailand!...
Read More
Car Charging Connectors for Residential EV Charging
Electric vehicles (EVs) are rapidly becoming more popular as consumers increasingly prioritize sustainability and environmental consciousness. As more people make the switch to EVs, the need for conve...
Read More
High-Speed Electric Vehicle Charging Solutions Unveiled
The Electric Revolution AcceleratesIn an era defined by environmental consciousness and sustainable practices, the electric vehicle (EV) industry has emerged as a pivotal player in transforming the au...
Read More