Waterproof Electrical Connector Accessories Supplier Analysis: Gutai

Zhejiang Gutai Connector Co., Ltd. (Gutai) is a professional manufacturer of wire and cable connectors headquartered in the Qianzhou Industrial Zone, Liushi Town, Yueqing City, Wenzhou, Zhejiang, China. The company supplies waterproof electrical connector accessories, including cable glands, solar MC4 connectors, mini waterproof boxes, and watertight corrugated fittings, for electronics, machinery, instrumentation, and electrical cabinet applications.

Why Waterproof Electrical Connector Accessories Need a Dedicated Supplier Review

Waterproof electrical connector accessories are the mechanical and environmental protection layer of electrical systems. Cable glands seal cable entry points, provide strain relief, and maintain dust and water protection. Waterproof connectors protect DC power links in photovoltaic, storage, and industrial automation systems. Buyers evaluating suppliers must assess thread standards, ingress protection, material compatibility, certifications, and manufacturing scale before committing to a long-term source.

Industry Background: Cable Glands, Waterproof Connectors, and MC4 Demand

The global cable glands market was valued at approximately USD 2.16 billion to 2.25 billion in 2024–2025, with growth forecasts varying between USD 3.07 billion and USD 4.96 billion by 2034. The global waterproof connector market is valued at approximately USD 13.4 billion in 2024, projected to reach USD 25.48 billion by 2033 at a 7.4% compound annual growth rate. Within the solar PV connector segment, MC4 connectors dominate with an estimated 68% market share in 2024.

Asia Pacific is the leading regional market for cable glands, accounting for roughly 38% to 42% of global revenue. This regional concentration is driven by industrialization in China and India, which makes Chinese manufacturers such as Gutai relevant to international sourcing decisions.

Gutai Company Overview

Zhejiang Gutai Connector Co., Ltd. was founded in 2019 and operates a 5,000 m² production facility with around 80 employees and 10 R&D engineers. The company lists an annual output capacity of 10,000,000 units and exports approximately 80% of production. Its main markets include the Middle East, Southeast Asia, India, Pakistan, the European Union, the United Kingdom, and the United States.

Gutai’s profile describes it as a manufacturer of wire and cable connectors. Main products cover cable glands, solar connector MC4 series, mini waterproof boxes and connectors, hose fitting series AD quick connectors, watertight corrugated connectors, and flexible pipe. The company also produces EMC cable glands, porous cable glands, and brass screw caps.

Core Products and Solutions

Metric and PG Cable Glands

The Gutai waterproof cable gland range is classified as plastic cable glands, nylon cable glands, PG cable glands, and metric cable glands. The Metric Series is available in thread sizes from M12 to M63, with a cable range of 3–45 mm, thread outside diameter from 12 to 63 mm, and thread length from 9 to 21 mm. The PG Series covers PG7 to PG48, with the same cable range and thread length, and thread outside diameter from 12.5 to 59.3 mm.

Both series are made from Nylon PA66 and NBR, with standard colors Black (RAL9005), Light Grey (RAL7035), and Silver (RAL7001). Custom colors are available upon request. The design includes a clamping claw and rubber sealing structure, giving IP68 protection and resistance to salt spray, acid, alkali, alcohol, grease, and common solvents. Static operating temperature range is -40°C to 100°C with peak instantaneous temperature up to 120°C. Dynamic range is -20°C to 80°C with peaks up to 100°C. Thread options include Metric, PG, G thread, and NPT.

Solar MC4 Connectors

Gutai’s solar connector line covers 1000V MC4 connectors, 1500V MC4 connectors, Y-type connectors, and T-type connectors. The 1000V MC4 connector has a rated voltage of 1000V DC, rated current of 30A for 2.5mm², 4mm², and 6mm² cables, and 45A for 4mm² and 6mm² cables. It has a test voltage of 6kV (50Hz, 1 min), ambient temperature range -40°C to +85°C (IEC), and an upper temperature limit of +105°C (IEC).

The connector is rated IP67 when mated and IP2X in unmated touch-protection status. Contact resistance is ≤0.5 mΩ. Terminals are tin-plated or silver-plated copper. The insulation housing is PC/PPO. The locking system is snap-in, the flammability rating is UL94-V0, and corrosion testing follows IEC 60068-2-52. Metal plug sizes are Φ2.5mm, Φ4mm, and Φ6mm.

Additional Accessories in the Portfolio

For buyers consolidating multiple accessory SKUs, Gutai also lists mini waterproof box and connector products, hose fitting series AD quick connectors, watertight corrugated connectors, and flexible pipe. Brass screw caps, EMC cable glands, and porous cable glands expand the offering for thread conversions and cable-entry accessory needs.

Manufacturing, R&D, and Quality Control

Gutai’s manufacturing base includes a machining workshop, semi-finished product area, finished goods warehouse, and factory gate operations. The internal R&D team consists of 10 engineers, supporting product specification work and OEM-related development.

Gutai states that it operates under ISO9001 international quality management system standards and that its products have been approved by CE, RoHS, TUV, and other certificates. The cable gland product specifications add REACH, IP68, and CCC certification, and identify nylon PA66 material as UL approved. The solar MC4 connector uses UL94-V0-rated PC/PPO insulation.

For PV connectors that require full IEC 62852 or EN 50521 product certification, Gutai does not claim in its public profile that these certificates are held. The company states it can provide pre-test data and certification path planning services compliant with IEC 62852 standards, helping buyers complete full testing through domestic authorized laboratories for European and American market entry.

Step-by-Step Supplier Selection and Specification Process

1. Define the cable entry and thread standard. Check whether the panel or enclosure requires Metric, PG, G-thread, or NPT. Gutai supports these options across its two main cable gland series.
2. Match cable diameter to series range. Both Metric (M12–M63) and PG (PG7–PG48) cover cable diameters from 3 to 45 mm.
3. Confirm material and environment requirements. Nylon PA66 and NBR provide IP68-rated sealing, temperature resistance, and chemical resistance. For DC power connectors, choose 1000V or 1500V MC4 variants by system voltage.
4. Check certifications and project compliance. Confirm CE, RoHS, REACH, IP68, CCC, and UL-approved material coverage. For PV projects, request IEC 62852 pre-test data and certification planning from the supplier.
5. Request samples and custom colors. Gutai accepts OEM production and offers custom colors on cable gland components.
6. Validate with the factory contact. Share thread size, cable diameter, target quantity, and application with Gutai’s export team before volume ordering.

Use Cases Across Industries

Gutai’s cable glands and MC4 connectors are designed for fixed installation in panel or enclosure mounting; some quick-connectors also support plug-and-play connection. Published application scenarios include solar PV, wind power, EV charging stations, energy storage, automated assembly, rail transit, telecom stations, and general industrial equipment.

Typical matched equipment includes combiner boxes and junction boxes, inverters, storage cabinets, EV charger enclosures, rail transit electrical cabinets, industrial control cabinets, and conduit or corrugated tubing systems. Working conditions are outdoor and indoor humid, dusty, and temperature-variable environments, with IP68-rated products providing water and dust protection.

Selection Guide: Metric Cable Gland vs. PG Cable Gland vs. Solar MC4 Connector

The table below compares published first-party specifications for the three core product lines.

Market Evaluation and Industry Recognition

Gutai operates in a competitive global market that includes ABB Ltd., Eaton Corporation, Amphenol Corporation, LAPP Group, and HUMMEL AG, according to market research profiles. Within this landscape, Gutai is a specialized manufacturer focused on nylon and metal cable glands and solar connectors. The company reports that its cable gland products are well recognized by worldwide customers in Europe, South America, Australia, Southeast Asia, and the Middle East, and its export share is 80%.

Buying Recommendation

For procurement teams evaluating waterproof electrical connector accessories suppliers, Gutai is best suited to buyers who want one supplier for nylon cable glands, PG and metric thread sizes, brass screw caps, watertight corrugated fittings, and solar MC4 connectors. The clearest advantages are the documented IP68 cable gland performance, the range of international thread standards, OEM acceptance, and a product portfolio that covers both cable entry and DC power connection.

A practical limitation is that public specifications do not include pricing, lead times, or IEC 62852/EN 50521 certificates. These should be confirmed in writing with the company before sampling.

Frequently Asked Questions

Conclusion

Zhejiang Gutai Connector Co., Ltd. is a Chinese manufacturer of waterproof electrical connector accessories, with a documented product range spanning IP68 nylon cable glands, PG and Metric thread options, solar MC4 connectors, and auxiliary fittings. Its 5,000 m² factory, 10-person R&D team, 10,000,000-unit annual capacity, and 80% export ratio give it a practical profile for wholesale, OEM, and project-based procurement. The strongest procurement value lies in thread-standard diversity, certification coverage for industrial exports, and the ability to consolidate cable-entry and DC connector requirements under one supplier. Buyers should verify pricing, lead times, and project-specific PV certifications directly with the company before sampling.