1×2 Singlemode FBT Splitter, 20/80, LC/UPC, 0.9 mm

FBT-1×2-SM-0.9-LCUPC-2080

Proposed model: FBT-1×2-SM-0.9-LCUPC-2080
Evidence status: sample-specific test values are transcribed from supplied product photographs; SKU-to-report mapping and production acceptance limits require BWNFiber engineering approval.
Reviewed by: TBC — BWNFiber product engineering
Revision: Offline draft v1, 2026-09-29

Product value summary

This proposed 1×2 singlemode FBT splitter assigns approximately 20% of the measured optical power to Port 1 and 80% to Port 2. The supplied sample record shows LC/UPC terminations, 0.9 mm leads and measurements at 1310 and 1550 nm. Use it only when the link budget and equipment interfaces require this unequal path assignment. The report-to-SKU mapping and production acceptance limits must be approved before quotation or publication.

For other ratios, connector types and package formats, compare FBT splitter configurations on the parent category page.

Short answer for buyers

The 20/80 label is not enough to release an order. Confirm which physical output is the 20% tap, which is the 80% through path, whether the acceptance limit includes the connectors, the required wavelengths, lead length, fiber grade and package. For the supplied sample, the photographed report identifies Port 1 as the 20% path and Port 2 as the 80% path at both recorded wavelengths.

Verified sample configuration

Sample test record

The following values are transcribed from the photographed Optic Coupler Test Report, serial FBT1*22023006324, dated 2023-04-10. They describe that photographed sample, not a family-wide guarantee.

Directivity shown on the sample report: ≥55 dB.
Return loss, PDL and production tolerance: TBC — not visible on the supplied report.

Technical-reference disclaimer

The figures above are sample-specific reference data, not a guarantee for production units. Final specifications and acceptance limits are subject to the approved datasheet, drawing, purchase order and test plan for the exact SKU.

How to confirm the 20/80 path assignment

1. Match the purchase order, product label and test-record serial number.
2. Identify Port 1 and Port 2 physically; do not infer them from fiber color alone unless the approved drawing defines the color convention.
3. Confirm that Port 1 is the required tap path and Port 2 is the required through path, or specify the reverse assignment explicitly.
4. Check both path losses against the link budget at every required wavelength; use the fiber splitter loss chart only as a planning aid, not as this SKU's acceptance specification.
5. Record whether the acceptance limits include the installed LC/UPC connectors.

Interfaces and configuration conditions

• Connector: LC/UPC is supported by the supplied label and photographs. Mate only with the approved LC/UPC interface; connector cleaning and end-face inspection remain installation requirements.
• Fiber mode and grade: the proposed model name says singlemode, but the exact fiber grade is TBC until a datasheet, BOM or engineering confirmation is supplied.
• Package: a metal tube is visible in the product photographs; material, dimensions and environmental rating are TBC.
• Wavelength: the sample was measured at 1310 and 1550 nm. Do not extend those measurements to 1490 nm or a broad operating band without an approved specification.
• Compatibility: no equipment-, brand-, PON-class-, speed- or distance-compatibility claim is made. Validate the complete optical budget and connector interface for the target system.

When this model may fit

Use this configuration when a passive 1×2 path requires a smaller tap and a larger through share, and when LC/UPC termination and the approved lead/package format match the host assembly. Possible project roles must be confirmed from the optical design; the component does not itself prove suitability for CATV, PON monitoring, test access or another named system.

Non-fit conditions

Do not select this SKU when the network requires equal splitting, more than two outputs, APC polish, an unterminated splice-in part, a different lead length, or acceptance limits that the approved datasheet cannot meet. For an equal unconnectorized alternative, review the 1×2 50/50 bare-fiber FBT splitter. Do not substitute it for a PLC splitter by comparing only the nominal ratio; compare FBT and PLC splitter roles before choosing the technology.

What to send for an RFQ

• Proposed model or reference model
• Quantity and delivery destination
• 1×2 input/output identification
• 20% tap and 80% through-path assignment
• Required wavelengths and link budget for both paths
• Fiber mode and exact fiber grade
• LC/UPC connector assignment
• Lead diameter and length for every leg
• Package dimensions and host enclosure
• Required insertion loss, excess loss, PDL, return loss and directivity limits
• Required sample, drawing, datasheet and per-unit or lot test record
• Label, serial-number and packaging requirements

Primary CTA: Send the BOM, link budget and port-assignment requirement for a configuration review before quotation.
Secondary CTA: Request the approved datasheet, drawing and sample test record for this exact SKU.