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Visible Samples
1-5 dB
Finished SC/APC sample photos cover each value from 1 dB to 5 dB.
Datasheet Range
0-30 dB
SC single-mode attenuator specification range from the local datasheet.
Low-dB Tolerance
±0.5 dB
Datasheet tolerance for 1 dB to 5 dB attenuation values.
APC Return Loss
≥50 dB
Single-mode APC return loss value stated in the FOCC datasheet.
Temperature
-40 to +80°C
Operating temperature range stated in the local specification.
Product positioning
For PON and access-network power trimming
SC/APC is the familiar green connector style in many FTTH and PON access environments. This product is positioned for the point where a link is already built around SC/APC hardware and the buyer needs a controlled loss value without changing connector family, cabinet layout or patch-cord routing.
The low 1-5 dB sample set is useful when the link is close to the receiver limit and only a small correction is needed. That is different from high-dB laboratory loading or long-distance simulation.
Why SC/APC is not the same story as SC/UPC
APC polish is chosen when return loss matters. The green SC/APC interface and the datasheet return-loss basis allow this page to speak directly to optical access, ODN and field-installation buyers who already specify APC in the link.
The strongest buying message is simple: keep the SC/APC interface consistent, add the exact fixed loss value, and protect the receiver from excessive optical power.
Product Specifications
These values come from the local SC Single-Mode Attenuator datasheet and the visible SC/APC sample files. Values not confirmed by the datasheet should be checked against the final order drawing or lot test report before purchase release.
| Product type | SC/APC male-female fixed fiber optic attenuator |
|---|---|
| Fiber mode | Single-mode |
| Attenuation range | Datasheet: 0-30 dB; visible SC/APC sample set: 1 dB, 2 dB, 3 dB, 4 dB, 5 dB |
| Attenuation tolerance | 0 dB: ±0.3 dB; 1-5 dB: ±0.5 dB; 6-30 dB: ±10% |
| Return loss | Single-mode APC ≥50 dB; single-mode UPC ≥45 dB is listed separately in the datasheet |
| Test wavelength | 1310/1550 nm, 1260/1620 nm, or 1240/1650 nm according to test requirement |
| Ceramic sleeve | Zirconia ceramic |
| Operating temperature | -40°C to +80°C |
| Material compliance | Raw materials comply with RoHS requirements |
| Appearance requirement | Clean and smooth surface, free of oil stains, burrs, cracks, deformation, rust and other visible defects |
Low-dB sample family
The current SC/APC folder gives this product page a clear commercial angle: low attenuation values for fine optical power adjustment. Many buyers do not need a dramatic 20 dB correction; they need a reliable 1 dB, 2 dB, 3 dB, 4 dB or 5 dB component that fits the SC/APC path already installed in the cabinet or test setup.
SC/APC 1 dB sample for small power correction
SC/APC 3 dB sample for common receiver-side trimming
SC/APC 5 dB sample for stronger low-range adjustment
Green SC/APC port and metal housing detail
Where this attenuator fits best
FTTH drop and ODN cabinets
Use where SC/APC patching is already standard and a small fixed loss helps bring received power into a safer operating window.
PON commissioning
Useful during link turn-up when field teams need a simple, known-value component instead of changing the whole link design.
Receiver protection
Helps reduce excessive optical power before it reaches ONT, ONU, test receivers or access-network equipment.
Maintenance spare kits
1-5 dB pieces are easy to organize as field stock for quick correction, replacement and troubleshooting tasks.
CATV and 1550 nm paths
SC/APC is often selected in access networks where reflected power needs closer attention; confirm wavelength and power level before ordering.
Lab verification
Good for checking receiver behavior under a defined optical loss without requiring a variable attenuator for every simple test.
How to choose the right dB value
- Measure the received optical power firstChoose the attenuator from the difference between actual received power and the receiver's preferred operating range.
- Keep connector polish consistentUse SC/APC in an SC/APC link. Do not mix APC and UPC faces as a workaround for attenuation.
- Use low dB values for fine correction1-5 dB is the practical family when the link only needs a small reduction, especially in access-network maintenance.
- Confirm test wavelength before releaseThe FOCC datasheet supports multiple test wavelength combinations, including 1310/1550 nm. Match the test request to the network application.
Buyer FAQ
Is this SC/APC attenuator mainly for high-dB loss simulation?
No. The current sample set is strongest for 1-5 dB low-range correction. The datasheet supports a wider 0-30 dB range, but this page is positioned around practical low-dB access-network adjustment.
Can it be used at 1310 nm and 1550 nm?
Yes, 1310/1550 nm is listed in the FOCC datasheet as one of the supported test wavelength combinations. Confirm the exact test wavelength requirement when placing the order.
What is the confirmed APC return-loss value?
The local SC single-mode attenuator datasheet states single-mode APC return loss of at least 50 dB.
Should buyers use APC and UPC attenuators interchangeably?
No. Match the attenuator polish to the installed connector polish. For SC/APC links, specify SC/APC rather than using an SC/UPC part as a substitute.
What should be confirmed before mass purchase?
Confirm attenuation value, tolerance, wavelength test requirement, packaging label, quantity, and whether the order needs lot-level inspection data or a test report.
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