What is Fiber Optic Connector?

Fiber optic connector is a device that allows detachable (movable) connections between optical fibers. It precisely connects the two end faces of the optical fibers to maximize the coupling of the optical energy output from the transmitting fiber to the receiving fiber, and minimize the impact on the system caused by its intervention in the optical link. This is the basic requirement of fiber optic connector. To some extent, fiber optic connectors affect the reliability and performance of optical transmission systems.

SC type fiber optic connector is a fiber optic connector developed by NTT Corporation in Japan. Its shell is rectangular, and the structural dimensions of the pins and coupling sleeves used are exactly the same as those of the FC type. The end faces of the pins are often polished using PC or APC grinding methods; The fastening method adopts a plug-in pin latch type, which does not require rotation. This type of connector is inexpensive, easy to plug and unplug, with small fluctuations in insertion loss, high compressive strength, and high installation density.
ST and SC interfaces are two types of fiber optic connectors. For 10Base-F connections, connectors are usually ST type, while for 100Base-FX, connectors are mostly SC type. The core of the ST connector is exposed, while the core of the SC connector is inside the joint.

Structural Characteristics and Performance Indicators of Various Single Mode Fiber Optic Active Connectors

Structural Characteristics and Performance Indicators of Various Single Mode Fiber Optic Active Connectors
	Type	FC/PC	FC/APC	SC/PC	SC/APC	ST/PC
Structure and characteristics	end face shape	Convex spherical surface	8 degree slope	Convex spherical surface	8 degree slope	Convex spherical surface
	connection method	thread	thread	Axial insertion and removal	Axial insertion and removal	snap
	connector shape	round	round	rectangle	rectangle	round
Performance indicators	average inertion loss	≤0.2	≤0.2	≤0.3	≤0.3	≤0.2
	maximum insertion loss	0.3	0.5	0.5	0.5	0.3
	repeatability	≤±0.1	≤±0.1	≤±0.1	≤±0.1	≤±0.1
	interchaneability	≤±0.1	≤±0.1	≤±0.1	≤±0.1	≤±0.1
	return loss	≥40	≥60	≥40	≥60	≥40
	insertion and removal time	≥1000	≥1000	≥1000	≥1000	≥1000
	temperature range for use	'-40~80	'-40~80	'-40~80	'-40~80	'-40~80

Applications

High-Density Patch Panel Cabling

The 0.5-meter ultra-short length minimizes cable slack in high-density environments, reducing congestion inside equipment cabinets and patching areas.

FTTH Terminal Box Connections

Ideal for connecting ONT devices to fiber rosettes and wall outlets in space-limited FTTH indoor installations.

ODF Internal Short-Distance Patching

Commonly used inside optical distribution frames for organized, low-clutter connections between adjacent modules, splitters, and adapters.

Compact Telecom Enclosures

Suitable for small junction boxes, wall-mount cabinets, and compact enclosures where longer cables would create unnecessary bulk.

Test Bench and Lab Equipment Links

Provides a short, consistent jumper option for optical test setups and reference device connections.

FAQ

Q: What return loss does this SC/APC patch cord provide?

A: ≥60dB return loss, as specified in the product performance table.

Q: What is the insertion loss?

A: Average insertion loss is ≤0.3dB, maximum 0.5dB.

Q: What does 8-degree angled end face mean?

A: SC/APC connectors have an 8-degree angled polish that directs reflected light away from the fiber core, reducing back reflection.

Q: How many mating cycles is the connector rated for?

A: ≥1000 insertion and removal cycles while maintaining stable optical performance.

Q: Why choose a 0.5-meter ultra-short patch cord?

A: Ultra-short patch cords reduce cable clutter, simplify management in high-density areas, and minimize excess cable in compact spaces.

Q: What is the operating temperature range?

A: -40°C to +80°C.

Q: What jacket and diameter options are available?

A: Jackets: PVC, LSZH, OFNP. Diameters: 3.0mm, 2.0mm, 0.9mm.

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