네트워크 도구 및 테스터
Cat5e 이더넷 케이블
Cat6 이더넷 케이블
Cat6a 이더넷 케이블
Cat8 케이블
벌크 이더넷 케이블
커넥터 및 잭
케이블 정리
OS2 싱글모드 심플렉스
OS2 싱글모드 듀플렉스
OM3 멀티모드 파이버
OM4 멀티모드
OM2 멀티모드
OM5 멀티모드
MTP/MPO 케이블
패치 케이블 맞춤
광섬유 부품
청소용품 및 도구
DisplayPort 케이블
미니 디스플레이포트 케이블
HDMI 케이블
HDMI 미니/마이크로 케이블
DVI 케이블
VGA 케이블
오디오 케이블
썬더볼트 케이블
USB-C 케이블
USB 3.0 케이블
전원 케이블
SATA 케이블
시리얼 케이블
12 Fiber LC UPC Pigtail, 1m G.652.D Single Mode 
Cat6 이더넷 벌크 케이블, 305m, UL 인증, 23AWG 단선 순동 와이어, 550MHz, 차폐형(F/UTP), PVC CMR(파란색) 
5m 접착식 벨크로 테이프 롤 케이블 정리용 고정 스트랩 재사용 가능한 케이블 오거나이저 
3m B9 RS232 직렬 널 모뎀 케이블 F/M 
1. Core Parameter Overview
| Connector | Shape | Ferrule Diameter | Locking Method | Port Density | Main Application |
|---|---|---|---|---|---|
| LC | Small square | 1.25mm | Snap latch | Highest | Data centers, optical modules, high-density cabling |
| SC | Large square | 2.5mm | Push-in lock | Medium | Home broadband, PON, ordinary LAN |
| ST | Round bayonet | 2.5mm | Twist bayonet | Low | Old campus networks, surveillance, legacy building wiring |
| FC | Round threaded | 2.5mm | Screw fastening | Lowest | ODF racks, base stations, precision instruments, long-distance trunk lines |
2. Detailed Introduction & Application
LC Connector (Small Square)
- Structure: Compact square design with spring latch, available in duplex integrated jumpers.
- Features: Half the size of SC, highest port density, easy plug-and-play, low insertion loss.
- Application:
- Data centers, rack switches, SFP/SFP+/QSFP optical modules.
- 10G/25G/100G high-speed fiber links.
- High-density patch panels and server rooms.
Its products mainly include：
SC Connector (Large Square)
- Structure: Square push-in design, locks directly after insertion, no rotation or screwing needed.
- Features: Cost-effective, durable, simple operation, low failure rate.
- Application:
- Home broadband, optical modem, operator fiber access.
- PON fiber, FTTH access, general enterprise LAN.
- Ordinary fiber transceivers and weak current cabinet wiring.
Its products mainly include：
ST Connector (Round Bayonet)
- Structure: Round shape, lock by rotating 90° after insertion.
- Features: Good tensile resistance, bulky and space-consuming, gradually phased out.
- Application:
- Legacy campus networks, old factories and building cabling.
- Security monitoring and industrial fiber points.
- Renovation of existing old equipment.
Its products mainly include：
FC Connector (Round Threaded)
- Structure: Round with threaded nut, fixed by screwing tightly.
- Features: Excellent vibration resistance, stable connection, good dustproof and anti-loosening performance; slow wiring and large size.
- Application:
- Telecom room ODF patch panels and backbone trunk transmission.
- Base stations, microwave communication and outdoor high-vibration environments.
- Fiber optic test instruments and precision communication devices.
Its products mainly include：
3. Key Differences Summary
- Ferrule: LC is 1.25mm; SC/ST/FC are all 2.5mm.
- Connection Method:
- LC / SC: Direct plug and play, fastest operation.
- ST: Twist to lock.
- FC: Screw tight, most stable but slowest.
- Density Ranking: LC > SC > ST > FC
- Vibration Resistance Ranking: FC > ST > SC > LC
4. Selection Guide
- Data center high-speed, optical module, high density → Choose LC
- Home broadband, optical modem, general office networking → Choose SC
- Legacy equipment, old campus surveillance → Choose ST
- Room patch panel, base station, precision testing, trunk line → Choose FC
Supplement: All four connectors have UPC (Blue) / APC (Green) end types, do not mix connections.
