1 In 3 Out Mini Size 48 Fiber Fiber Optic Splice Closure Dome Type Fiber Optic Joint Closure for Outdoor FTTH Networks

The 1-in 3-out 4-port vertical fiber optic cable junction box is a mini-sized splice enclosure designed for reliable fiber protection in demanding outdoor environments. Its robust housing provides fire resistance, anti-aging, waterproof, anti-UV, and quakeproof performance, protecting splices during pulling, twisting, and impact. It ensures long-term reliability and operation under ambient temperatures from -40°C to +65°C.

The enclosure is suitable for direct connection or splicing of optic cable fibers in aerial, underground, direct buried, wall-mounting, hand hole, and duct mounting applications. It can be mounted on a pole, wall, or strand.

• Dome, vertical fiber splice type
• Total 4 cable ports: 3 round ports and 1 oval port
• 6–24 cores total capacity, max. 4 trays
• Elastic integrated seal ensures a tightening fit
• Housing provides fire resistance, waterproofing, and quakeproof protection for splices during handling
• Operating temperature: -40°C to +65°C

• FTTX (FTTP, FTTH, FTTN, FTTC)
• CATV systems
• Optical fiber communication
• Testing equipment
• Fiber optic network convergence
• Optical fiber access networks
• Fiber data transmission
• Optical fiber video transmission
• Fiber multimedia systems
• Fiber Ethernet
• Photoelectric conversion systems

1. Stretch: The sealed and inflated box body at 60 kPa ± 5 kPa can withstand 1000 N axial tension for 1 minute with no change in air pressure.
2. Flattening: The sealed and inflated box body at 60 kPa ± 5 kPa can bear a horizontal uniform pressure of 2000 N/10 cm. The pipe can withstand 600 N/10 cm without change in air pressure.
3. Impact: The sealed and inflated box at 60 kPa ± 5 kPa is subjected to a 1 kg steel ball dropped from 1.6 m above the box three times; the box does not crack and pressure remains unchanged.
4. Bending: The sealed and inflated box at 60 kPa ± 5 kPa is subjected to a tension load of 150 N with a bending angle of ±45° for 10 cycles, with no change in air pressure.
5. Torsion: The sealed and inflated box at 60 kPa ± 5 kPa is subjected to a torque of 50 N·m with a torsion angle of +90° for 10 cycles, with no change in air pressure.
6. Sealing Performance: At a gas pressure of 100 kPa ± 5 kPa, water bath soak for 15 minutes shows no bubbles escaping, and no change after 24 hours under pressure.
7. Insulation Resistance: At a water depth of 1.5 m, soaked for 24 hours, insulation resistance ≥ 2 × 10⁴ MΩ.
8. Voltage Resistance: At a water depth of 1.5 m, soaked for 24 hours, 15 kV DC for 1 minute without breakdown and no arcing phenomenon.
9. High-Temperature Test: The sealed and inflated box at 60 kPa ± 5 kPa, at +60°C for 2 hours, shows no deformation and no leakage.
10. Low-Temperature Test: The sealed and inflated box at 60 kPa ± 5 kPa, at -40°C for 2 hours, shows no deformation and no leakage.
11. Temperature Cycle Test: The sealed and inflated box at 60 kPa ± 5 kPa, at -40°C with 2 hours constant temperature per point, three cycles, pressure drop amplitude ≤ 5 kPa.

We offer OEM and ODM services to display your own brand logo on goods such as cables, packaging bags, labels, or any other location. Please contact our sales team for the best support.

• Standard export packing
• Carton box, wooden box, wooden pallet

• International express: UPS, TNT, DHL, etc.
• International air: CA, AA, EA, etc.
• By sea
• Standard export sea port: Shenzhen, Hongkong, Ningbo
• Standard export airport: Shenzhen, Hongkong, Hangzhou, Shanghai