BWN-TK-M12-OS2-YEL-B-{JKT}-{LEN} + configuration options
MPO 12 Fiber OS2 Type B Trunk Cable
The BWNFiber 12-fiber MPO OS2 trunk cable terminates one MPO-12 APC female connector on each end of a 3.0 mm yellow jacket, built as Type B. It is the Base-12 singlemode trunk for plants that run the Type B method, with APC endfaces for high return loss.

Product Overview
The BWNFiber 12-fiber MPO OS2 trunk cable terminates one MPO-12 APC female connector on each end of a 3.0 mm yellow jacket, built as Type B. It is the Base-12 singlemode trunk for plants that run the Type B method, with APC endfaces for high return loss.
Polarity is fixed at Type B in this official build. Many singlemode cassette plants use Method A, so confirm the plant method before ordering — if the site is Method A, request that build on the drawing instead of forcing this SKU. APC polish must mate with APC ports; never mix APC and UPC/PC on one connection. Overall length runs 5-100 m.
Key Features
- One MPO-12/APC female connector on each end
- 12 live fibers, OS2 9/125 μm singlemode
- APC polish for high return loss
- Type B polarity fixed in the official build
- 3.0 mm round yellow jacket
- 5-100 m standard length set, custom on request
- 100% factory-terminated and optically tested before shipment
Technical Specifications
| Item | Specification |
|---|---|
| Product family | MPO Trunk Cable |
| Interface | MPO-12 to MPO-12 |
| Active fibers | 12 |
| Fiber type | OS2 singlemode, 9/125 μm |
| Jacket color | Yellow |
| Polish | APC |
| Gender | Female (F), both ends |
| Polarity | Type B (fixed in this build; confirm the plant method before ordering) |
| Cable OD | 3.0 mm |
| Overall length | 5-100 m standard set; custom on request |
| Standards | TIA/EIA-568.3-D, EIA/TIA 604-5, IEC 61754-7, IEC 61753-1, GR-1435-CORE, RoHS |
Final insertion loss and return loss limits follow the BWNFiber test specification for the selected loss grade. Test method reference: IEC 61300-3-4.
Selection Guidance
- This build is Type B. Many singlemode cassette plants use Method A — confirm the plant method first and request a Type A build if the site needs it.
- APC endfaces must mate with APC ports. Do not mix APC and UPC/PC on the same connection.
- Female (unpinned) ends mate with pinned cassette and panel ports; male (pinned) builds are quoted on request.
- For 48-fiber singlemode backbones, see the 4×12 OS2 trunk; for multimode halls, see the OM4/OM5 12F trunks.
- Jacket by space: OFNP for plenum, OFNR for riser shafts, LSZH for enclosed or public areas.
Applications
- Base-12 OS2 singlemode interconnect inside the premises plant
- Type B singlemode trunks after the site polarity plan is confirmed
- Cassette and panel backbones in singlemode halls
- Long-reach in-building links beyond multimode distance limits
Order Guide
Polarity is already fixed as Type B in this build — choose overall length and jacket. If the site plan calls for Type A, request that build on the drawing.
| Configuration | Part Number | Description |
|---|---|---|
| Type B / LSZH | BWN-TK-M12-OS2-YEL-B-LSZH-{LEN} | MPO-12/APC (F) to MPO-12/APC (F) trunk, 12F OS2, yellow, Type B |
| Type B / OFNP | BWN-TK-M12-OS2-YEL-B-OFNP-{LEN} | MPO-12/APC (F) to MPO-12/APC (F) trunk, 12F OS2, yellow, Type B |
| Type B / OFNR | BWN-TK-M12-OS2-YEL-B-OFNR-{LEN} | MPO-12/APC (F) to MPO-12/APC (F) trunk, 12F OS2, yellow, Type B |
Standard lengths: 5, 7, 10, 15, 20, 25, 30, 40, 50, 60, 70, 80, 90 and 100 m. Custom lengths between or beyond these steps are quoted on the drawing.
Why Source from BWNFiber
BWNFiber factory-terminates and inspects every MPO end before shipment, records polarity per order, and can attach IL/RL test reports for project handover. Catalog jackets cover LSZH, OFNP and OFNR; PVC, TPU and PE are quoted on project orders, together with OEM printing and labeling. Polarity records travel with each order — essential on singlemode plants where Method A and Method B hardware coexist. Send the interface, fiber type, jacket and overall length, and BWNFiber returns a build sheet before production.
View the complete MPO Trunk Cable series for related patch cord, armored, breakout and conversion configurations.
Need a Configuration Review or Sample?
Share the fiber count, connector map, polarity, jacket, overall length and quantity for a project-specific review.
Frequently Asked Questions
The page says Type B. My plant is Method A — what do I do?
Do not force this SKU. Request a Type A 12F OS2 build on the drawing; it is a different factory build, not a field change.
Why APC on this trunk?
OS2 MPO assemblies in this catalog are built with APC polish for higher return loss. Mate APC only with APC ports.
Is this the same as the 48-fiber OS2 trunk?
No. This page is the single MPO-12, 12-fiber build. The 48-fiber OS2 trunk carries four MPO-12 connectors per end.
Can I mix this with UPC patch cords?
No. APC and UPC endfaces must never be mated — the angled and flat polishes cannot seat correctly and the link will fail.
What lengths are listed?
5 m to 100 m in the standard set, plus custom lengths quoted on the drawing.
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