BWN-TK-4X12-OS2-YEL-{POL}-{JKT}-{LEN}-L{03|05} + configuration options
48-Fiber 4×12 MPO OS2 Trunk Cable
The BWNFiber 48-fiber 4×12 MPO OS2 trunk cable terminates four MPO-12 APC female connectors on each end of a yellow bundled jacket. It gives singlemode plants a pre-terminated 48-fiber backbone between rooms, floors and buildings inside the premises network.

Product Overview
The BWNFiber 48-fiber 4×12 MPO OS2 trunk cable terminates four MPO-12 APC female connectors on each end of a yellow bundled jacket. It gives singlemode plants a pre-terminated 48-fiber backbone between rooms, floors and buildings inside the premises network.
This is a 4×12 assembly with APC polish on every end, not a single MPO-48 ferrule. Singlemode cassette plants frequently run Method A, so polarity deserves an explicit check before the order is placed. Overall length runs 5-100 m with 0.3 m or 0.5 m end legs; APC endfaces keep reflectance low on analog-sensitive and high-speed singlemode channels.
Key Features
- Four MPO-12/APC female connectors on each end (4×12 bundle map)
- 48 live fibers, OS2 9/125 μm singlemode
- Yellow bundled jacket, 9.5 mm typical OD
- APC polish on every end for high return loss
- Type A, Type B or Type C polarity built to the site drawing
- 0.3 m or 0.5 m end legs; LSZH, OFNP and OFNR jacket options
- 100% factory-terminated and optically tested before shipment
Technical Specifications
| Item | Specification |
|---|---|
| Product family | MPO Trunk Cable |
| Bundle map | 4×12 MPO-12, four connectors per end |
| Active fibers | 48 |
| Fiber type | OS2 singlemode, 9/125 μm |
| Jacket color | Yellow |
| Polish | APC |
| Gender | Female (F), all ends |
| Polarity | Type A / Type B / Type C, per order — confirm on singlemode cassette plants |
| Overall length | 5-100 m standard set; custom on request |
| End-leg length | 0.3 m or 0.5 m |
| Typical bundled OD | 9.5 mm |
| 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
- Polarity is not field-switchable. Singlemode cassette plants often use Method A — confirm the method on the site drawing before choosing Type A, B or C.
- 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.
- State the end-leg length (0.3 m or 0.5 m) on the PO. It does not replace overall length.
- Jacket by space: OFNP for plenum, OFNR for riser shafts, LSZH for enclosed or public areas.
- This page is the 4×12 OS2 build. For OM3/OM4 multimode 48-fiber trunks, see the related products below.
Applications
- Singlemode backbones between rooms, floors or buildings in the premises plant
- OS2 cassette-to-cassette 48-fiber links on four MPO-12 ports per end
- Centralized cross-connects feeding Base-12 singlemode distribution
- Long-reach campus links where multimode distance limits do not fit
Order Guide
This SKU is built to the ordered polarity and is not polarity-switchable in the field. Select the polarity from the site drawing, then overall length and jacket. End-leg length (0.3 m or 0.5 m) is stated separately on the PO.
| Configuration | Part Number | Description |
|---|---|---|
| Type A | BWN-TK-4X12-OS2-YEL-A-{JKT}-{LEN}-L{03|05} | 4×12 MPO/APC (F) to 4×12 MPO/APC (F) trunk, 48F OS2, yellow |
| Type B | BWN-TK-4X12-OS2-YEL-B-{JKT}-{LEN}-L{03|05} | 4×12 MPO/APC (F) to 4×12 MPO/APC (F) trunk, 48F OS2, yellow |
| Type C | BWN-TK-4X12-OS2-YEL-C-{JKT}-{LEN}-L{03|05} | 4×12 MPO/APC (F) to 4×12 MPO/APC (F) trunk, 48F OS2, yellow |
Standard lengths: 5, 7, 10, 15, 20, 25, 30, 40, 50, 60, 70, 80, 90 and 100 m, in LSZH, OFNP or OFNR. Custom lengths between or beyond these steps, and pulling eyes, 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, which matters on singlemode plants where Method A and Method B hardware coexist. Send the map, fiber type, polarity, jacket, overall length and end-leg 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
Is this an MPO-48 cable?
No. It carries four MPO-12 APC connectors on each end with 48 live OS2 fibers.
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.
Which polarity should I order?
Confirm the plant method first — many singlemode cassette plants use Method A. Type A, Type B and Type C are all built to order against the site drawing.
Can I use this between buildings?
Yes, within the premises plant and the 5-100 m length set, provided the jacket rating matches the route. For outdoor or duct routes between structures, ask for the appropriate jacket on the drawing.
What does the 0.3 m / 0.5 m length mean?
That is the short end-leg length at each bundled end, where the four MPO-12 connectors leave the round jacket. It is separate from the overall length.
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