Electrical power supply connector

wire-to-wirecircularbayonet

Product Summary
M28 4-pin bayonet-locking waterproof circular connector rated IP67, designed for industrial power distribution, solar PV and energy storage applications. Rated for 60A/600V with Φ3.6mm copper-alloy contacts and compatible with cable outer diameters Φ10.0mm–Φ19.0mm.

Key Features

• 60A High Current Capacity – Φ3.6mm copper-alloy contacts deliver 60A at rated voltage for medium-to-high power equipment.
• Bayonet Locking Mechanism – 90° quick twist for fast, secure mating with vibration resistance.
• IP67 Waterproof – Sealed against dust and temporary immersion for outdoor and industrial use.
• Wide Cable Compatibility – Accepts cable outer diameters from Φ10.0mm to Φ19.0mm.
• Global Certifications – ISO9001, CE, UL, RoHS and optional TUV where applicable.

Product Specifications (table)
Product Details | Specification 1 | Specification 2 | Specification 3 | Specification 4
Pin number | 2 Pin | 3 Pin | 4 Pin | 5 Pin
Pin diameter X number | 4.8mm | 4.8mm | 3.6mm | 3.0mm
Current rating | 80A | 80A | 60A | 40A
Voltage rating | 300V | 300V | 300V | 125V+60V
Withstanding voltage | 600V | 600V | 600V | 300V
Cable Gauge | | | |
Diameter Range | Φ10.0mm–Φ19.0mm | Φ10.0mm–Φ19.0mm | Φ10.0mm–Φ19.0mm | Φ10.0mm–Φ19.0mm
Protection Level | IP67 | IP67 | IP67 | IP67
Connecting mode | Bayonet Lock | Bayonet Lock | Bayonet Lock | Bayonet Lock
Prevent the combustion level | UL94-V0 | UL94-V0 | UL94-V0 | UL94-V0
Operating temperature | -40℃ – 105℃ | -40℃ – 105℃ | -40℃ – 105℃ | -40℃ – 105℃
Certification | ISO9001, CE, UL, ROHS | ISO9001, CE, UL, ROHS | ISO9001, CE, UL, ROHS | ISO9001, CE, UL, ROHS

Description Details
This M28 4-pin connector belongs to the M28 series of circular waterproof connectors engineered for outdoor power distribution, photovoltaic systems, energy storage and industrial power equipment. It features a Φ3.6mm copper-alloy contact set rated for 60A, a bayonet quick-lock mechanism for reliable mating, and an IP67 housing to protect against dust ingress and temporary immersion. The connector accepts cable outer diameters from Φ10.0mm to Φ19.0mm and uses flame-retardant materials meeting UL94-V0. Series certifications include ISO9001, CE, UL and RoHS. Optional customization is available (e.g., higher ingress protection such as IP69K) for washdown or harsh environments.

Technical Characteristics / Specifications

• Series: M28 series
• Contact configuration (this page): 4 Pin (also available in 2, 3, 5 pins)
• Contact diameter (4-pin): Φ3.6mm copper alloy
• Rated current (4-pin): 60A
• Rated voltage: 300V
• Withstanding voltage: 600V
• Supported cable diameter range: Φ10.0mm–Φ19.0mm
• Protection level: IP67 (optional IP68/IP69K on request)
• Connection method: Bayonet lock (90° twist)
• Housing flame retardancy: UL94-V0
• Operating temperature: -40℃ to 105℃
• Mating durability: rated for 500+ mating cycles (series characteristic)
• Certifications: ISO9001, CE, UL, RoHS, TUV (where applicable)
• Typical applications: industrial power distribution, solar PV, energy storage, outdoor lighting and marine/industrial environments