Quick Answer: HYSF SF (Split Flap) series multi-flap connectors offer 12-24 core underwater connectivity with innovative split-flap design for easy termination. The 3-flap configuration (SF-24-3AW) provides organized wire management (8 conductors per flap), faster installation (40-60% time savings), and superior sealing. Ideal for energy industry, ROV systems, and multi-sensor arrays. Standard delivery is 3-5 days for samples, 10-15 days for bulk orders.
Detailed Explanation
Multi-core underwater connectors present unique challenges: managing numerous wires, ensuring reliable sealing, and enabling field serviceability. HYSF’s split-flap design addresses these challenges with an innovative approach that simplifies termination while maintaining superior underwater performance.
What Are Split-Flap Connectors?
Split-flap connectors feature multiple independently opening sections (flaps) that provide organized access to internal contacts:
- Traditional Design: All wires must be threaded through a single opening
- Split-Flap Design: Multiple flaps open independently (2-flap, 3-flap configurations)
- Benefit: Each flap manages a subset of conductors (e.g., 8 wires per flap in 24-core system)
SF Series Product Line
| Model | Total Cores | Flap Count | Cores per Flap | Best For |
|---|---|---|---|---|
| SF-12-2AW-DC | 12 cores | 2 flaps | 6 cores/flap | Medium-density connections |
| SF-16-3AW-DC | 16 cores | 3 flaps | 5-6 cores/flap | Multi-sensor arrays |
| SF-24-3AW-DC | 24 cores | 3 flaps | 8 cores/flap | High-density power/data (most popular) |
| SF-36-4AW-DC | 36 cores | 4 flaps | 9 cores/flap | Very high-density systems |
Key Advantages of Split-Flap Design
1. Organized Wire Management
With 24 conductors to terminate, organization is critical:
- Grouped Conductors: 8 wires per flap (for SF-24-3AW)
- Color Coding: Easy to label and identify by flap
- Reduced Tangling: Work on one section at a time
- Clear Access: Each flap provides unobstructed access to its contacts
2. Faster Termination
Time savings compared to traditional multi-core connectors:
- Traditional: Thread all 24 wires through single opening (time-consuming)
- Split-Flap: Open flap, terminate 8 wires, close flap (repeat 3x)
- Time Savings: 40-60% reduction in termination time
- Error Reduction: Less chance of wiring mistakes
3. Superior Sealing
Multiple sealing points provide enhanced protection:
- Flap Seals: Individual O-ring seal on each flap
- Body Seal: Main connector body seal
- Cable Entry Seals: Individual cable gland seals
- Redundancy: Multiple barriers against water ingress
4. Field Serviceability
Easy maintenance and repair in the field:
- Individual Flap Access: Open only the flap needing service
- Partial Re-termination: Replace damaged wires without full rework
- Inspection: Visual inspection of contacts without full disassembly
- Testing: Test individual flaps independently
Technical Specifications
| Specification | SF-24-3AW-DC |
|---|---|
| Pin Count | 24 cores (arranged in 3 flaps × 8 cores) |
| Current Rating | 5-10A per contact (depends on wire gauge) |
| Voltage Rating | Up to 300V |
| Insulation Resistance | ≥1000 MΩ @ 500V DC |
| Contact Resistance | ≤10 mΩ |
| Depth Rating | 100m, 300m, 1000m (standard), custom to 3000m |
| Housing Material | Engineering plastic (POM) with stainless steel reinforcement |
| Sealing | IP68, Viton O-rings on flaps and body |
| Temperature Range | -40°C to +85°C |
| Cable Entry | 3 entries (one per flap), 6-12mm OD per entry |
| Termination | Solder cup or crimp contacts |
| Mating Cycles | 500+ cycles (tested) |
Typical Applications
Energy Industry
- Oil & Gas: Subsea wellhead monitoring, underwater production systems
- Renewable Energy: Offshore wind farms, tidal/wave energy systems
- Power Distribution: Subsea electrical grids, junction boxes
ROV/AUV Systems
- Tooling Interfaces: Multi-function ROV tools
- Sensor Arrays: Multi-beam sonar, camera systems
- Power Distribution: ROV power management systems
Scientific Research
- Oceanographic Instruments: CTD arrays, water samplers
- Seafloor Observatories: Long-term monitoring stations
- Hydrophone Arrays: Multi-channel acoustic monitoring
Industrial Applications
- Underwater Welding: Multi-power conductor connections
- Aquaculture: Fish farm monitoring systems
- Subsea Construction: Temporary power/data connections
Installation Best Practices
Pre-Installation Checklist
- ✓ Verify connector model matches requirements
- ✓ Check all flaps open and close smoothly
- ✓ Inspect O-rings for damage or debris
- ✓ Review pin assignment diagram
- ✓ Prepare proper tools (strippers, soldering iron/crimper, multimeter)
- ✓ Label wires according to flap assignment
Step-by-Step Termination
- Plan Wire Assignment: Assign wires to flaps (e.g., 1-8 to Flap 1, 9-16 to Flap 2, 17-24 to Flap 3)
- Open Flap 1: Release latch, open first flap fully
- Prepare Wires 1-8: Strip insulation (3-5mm for solder, 6-8mm for crimp)
- Terminate Wires 1-8: Solder or crimp to contacts (follow pinout diagram)
- Inspect Flap 1: Verify all connections, check for cold solder joints or poor crimps
- Close Flap 1: Secure latch, verify O-ring is seated properly
- Repeat for Flap 2: Follow same process for wires 9-16
- Repeat for Flap 3: Follow same process for wires 17-24
- Final Testing: Continuity test all 24 conductors, insulation resistance test
- Documentation: Record test results, label connector with date and technician ID
Common Mistakes to Avoid
- ❌ Crossing Wires Between Flaps: Keep wire assignment organized
- ❌ Damaging O-Rings: Handle flaps carefully, inspect seals before closing
- ❌ Overtightening Latches: Secure but don’t force (can damage seals)
- ❌ Skipping Testing: Always test before deployment
- ❌ Poor Wire Preparation: Proper stripping length is critical
Quality Testing
Standard Tests (Included)
- ✓ 100% continuity testing (all 24 cores, flap-by-flap)
- ✓ Insulation resistance (≥1000 MΩ @ 500V DC between all contacts)
- ✓ Hi-pot testing (1000V AC, 60 seconds, no breakdown)
- ✓ Contact resistance (≤10 mΩ per contact)
- ✓ Flap sealing verification (visual inspection)
- ✓ Latch mechanism testing (50+ open/close cycles)
Optional Tests (Available)
- Pressure testing (simulated depth, 1.5x rated pressure)
- Salt spray testing (corrosion resistance, 48-96 hours)
- Temperature cycling (-40°C to +85°C, 10 cycles)
- Vibration testing (IEC 60068-2-6)
- Mating cycle testing (500+ cycles)
Ordering Information
When ordering SF series split-flap connectors:
- Specify Model: SF-24-3AW-DC (or other SF series model)
- Quantity: Number of pieces needed
- Depth Rating: 100m, 300m, 1000m (standard), custom available
- Termination Type: Solder cup or crimp contacts
- Cable Entry Size: Standard 6-12mm OD (custom available)
- Application: Energy, ROV, research, etc. (for technical support)
Pricing and Availability
| Quantity | Discount | Lead Time | Best For |
|---|---|---|---|
| 1-9 pcs | Standard pricing | 3-5 days | Samples, prototypes |
| 10-49 pcs | 10% discount | 5-7 days | Small projects |
| 50-99 pcs | 20% discount | 7-10 days | Medium production |
| 100+ pcs | 30%+ discount | 10-15 days | Large production, OEM |
Compatible Accessories
Protective Caps
- SF-CAP-24: Protective cap for SF-24 series (keeps flaps closed during storage)
Cable Glands
- SF-CG-6-12: Cable gland kit for 6-12mm OD cables (included with connector)
- SF-CG-12-18: Cable gland kit for 12-18mm OD cables (optional)
Termination Tools
- SF-TOOL-KIT: Complete termination toolkit (strippers, crimpers, test leads)
- SF-JIG-24: Termination jig for SF-24 series (holds connector during wiring)
How to Request a Quote
For SF series split-flap connector quotations:
- Send Inquiry: Email info@hysfsubsea.com
- Specify Model: SF-24-3AW-DC (or other SF series model)
- Quantity: Number of pieces needed
- Application: Energy, ROV, research, etc.
- Special Requirements: Custom depth rating, cable entry size, etc.
Response Time: Complete quotation within 24-48 hours including freight options
Contact: info@hysfsubsea.com
Need 24-core split-flap underwater connectors for your multi-conductor application? Contact us with your specifications and we’ll provide competitive pricing with fast delivery within 24-48 hours.
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