HYSF MCBH21M is the world’s highest-density 21-pin male bulkhead connector with only Ø15.7 mm body. IP68 rated, 60 MPa tested, engineered for ultimate Gigabit Ethernet + multi-power + multi-sensor feedthroughs on micro-ROVs, AUVs, deepsea high-channel switch pods and extreme-density instrumentation up to 6000m.

The HYSF MCBH21M represents the absolute limit of subsea connector technology — an incredible 21 independent channels packed into the same Ø15.7 mm Micro envelope, making it the highest pin-count male bulkhead connector ever produced under 20 mm. With only 31.7 mm mated length, it is the ultimate penetrator for the most channel-hungry applications.
Precision-machined marine-grade 316L stainless steel with gold-plated brass pins, double O-ring sealing, and supplied with stainless hex nut + washer for secure panel mounting. Pre-terminated with 21 color-coded PTFE leads for rapid internal wiring.
Essential for next-generation observation-class ROVs, ultra-compact AUV pressure housings, deep-rated multi-sensor hubs, and Ethernet + power distribution panels requiring the absolute maximum channel density in the smallest possible footprint. ISO9001-2015 certified with 100% hyperbaric validation.
Model: MCBH21M
Brand: HYSF
Type: Miniature 21-Core Male Bulkhead Connector
Gender: Male
Pin Count: 21
Contact Material: Gold-plated Brass
Current Rating: 10A per Pin
Voltage Rating: 600V AC/DC
Housing Material: 316L Stainless Steel
Sealing: Double O-Ring
Body Diameter: Ø15.7 mm
Mated Length: 31.7 mm
Mounting: M16 Thread with Hex Nut & Washer
Cable: Pre-terminated 21-color PTFE Leads
Waterproof Rating: IP68
Pressure Rating: 60 MPa (~6000 m)
Operating Temperature: -20°C to 80°C
Application: Ultimate-Density Gigabit Ethernet + Multi-Power Penetrators, Extreme ROV Ports, AUV High-Channel Hubs, Deepsea Feedthrough
Certification: ISO9001-2015
Compatibility: Subconn Micro Series 21-pin / MCIL21F / MCBH21F
Place of Origin: Guangdong, China
We're here to help you with your needs. Let's talk about how we can help you.
© 2025 HYSF Underwater Connectors | All rights reserved.