The MC4 photovoltaic connector is a widely used standardized DC connection interface in solar power generation systems. It features a male and female anti-reverse insertion design, with a rated voltage of 1000-1500V and a rated current of 20-50A (some models can reach 60A).
This connector uses tin-plated copper alloy terminals to ensure low-resistance conductivity and is equipped with a self-locking mechanism (with a "click" sound when operated) to prevent accidental disconnection. The housing is made of UV-resistant engineering plastic and has an IP67/IP68 protection rating, making it suitable for various harsh outdoor environments.
As a standard configuration in the photovoltaic industry, the MC4 connector is mainly used for the series connection of photovoltaic modules and the connection from strings to inverters, supporting 4-6mm² photovoltaic cables.
Connector system |
Φ4mm |
Rated voltage |
1500V DC(lEC) |
Rated current |
17A,22A,30A(1.5mm²,2.5mm²;14AWG,4mm²;6mm²; 12AWG,10AWG) |
Test voltage |
6kV(50Hz,1min.) |
Contact matenal |
Messing,verzinnt Copper Alloy,tin plated |
Insulation matenal |
PC/PPO |
Lockirg system |
Snap-in |
Flame class |
UL-94-V0 |





Q1: Are you a trading company or a manufacturer?
We are Integration of industry and trade, our company has a history of 40 years. We have been specializing in the production of a series of photovoltaic electrical products, such as circuit breaker, pv combiner boxes, pv connector, surge protector, pv fuses, pv tool accessories and etc.
Q2: If OEM is acceptable?
We can provide OEM and ODM services. We have many different specifications and appearances for customers to choose.
Q3: Do you provide sample? Free or charge?
We can provide free samples to customers, but only one piece, but customers need to bear the freight. For some special products, we also offer free samples. Considering their particularity, we usually refund the sample fees to customers after they place formal orders.
Q4: How long is your delivery time?
Our delivery time is determined according to the purchase quantity. Generally, it is about 3-40 days, less than 300 pieces within 5 days, 300-2000 pieces within 7-15 days, 2000-20000 only within 15-40 days.
Q5: What are the current and voltage ratings?
The rated current and voltage of Korlen photovoltaic connectors vary according to the specific model. The rated current of the standard type is 20A-50A (some models can reach 60A), and the rated voltage meets the 1000V-1500V photovoltaic DC voltage range, which is suitable for different photovoltaic power stations.
Q6: How to ensure low contact resistance?
Korlen photovoltaic connector contact is made of high quality copper and silver plated, good electrical conductivity and low resistivity; The manufacturing process strictly controls the processing accuracy of the contact, and professional equipment is used for assembly to ensure tight contact and reduce contact resistance.
Q7: Does it have a leakage protection function?
Yes, Korlen PV connectors is leak-proof. The insulation part is made of high-performance engineering plastics with high insulation resistance; The structure is well sealed to prevent water vapor and dust from entering; There is strict leakage detection in production.
Q8: How is the firmness of the connection guaranteed?
Korlen PV connectors feature a reliable locking design (e.g. double locking); In terms of materials, the shell and connecting parts are made of high-strength, wear-resistant materials; Strict fastness testing in production.
Q9: How to ensure the reliability of the product?
Korlen PV connectors select high-quality suppliers in the procurement of raw materials, the production follows a strict quality management system, each process testing, as well as a variety of reliability tests, and has perfect after-sales service.