- Part number
- 6GK5991-1AF00-8GA0
- Model no
- SFP991-1LD A SCALANCE X accessory; Active plug-in transceiver SFP991-1LD A; 1x 100 Mbit/s LC port, optical; single-mode optical up to max. 26 km.
- CE
SCALANCE XSiemens 6GK5991-1AF00-8GA0 SCALANCE X SFP991-1LD A 100 Mbit/s LC Single-Mode 26 km SFP Transceiver Module
Siemens SFP991-1LD A SCALANCE X SFP transceiver: 100 Mbit/s LC single-mode port, up to 26 km, IP20, -40 to +95 deg C.
Description
About the SFP991-1LD A SCALANCE X accessory; Active plug-in transceiver SFP991-1LD A; 1x 100 Mbit/s LC port, optical; single-mode optical up to max. 26 km.
About the SFP991-1LD A SCALANCE X accessory; Active plug-in transceiver SFP991-1LD A; 1x 100 Mbit/s LC port, optical; single-mode optical up to max. 26 km.
The Siemens 6GK5991-1AF00-8GA0 (SFP991-1LD A) is an active plug-in SFP transceiver for the SCALANCE X media module slot, adding one 100 Mbit/s optical LC port. It runs single-mode fiber and covers a range of up to 26 km at 1310 nm on the 100BASE-LX link. Operating temperature extends to -40...+95 degrees C, and IP20 latched mounting keeps installation straightforward inside the switch housing.
Certifications & Standards
- CE
- C-Tick
- EPD
Selection Notes
The A suffix on the SFP991-1LD A marks Siemens' extended-temperature build: -40 to +95 degrees C operation, with a 16-hour rating at the top end, versus the -40 to +85 degrees C spec on the standard SCALANCE X media modules, making it the choice for switches in unheated cabinets or direct sun exposure. Its single-mode link reaches up to 26 km, far beyond the 5 km limit of the multimode ST/BFOC media module in this series, so it is the transceiver to specify whenever the fiber run between two SCALANCE X switches exceeds multimode distance limits. Pick a standard-temperature single-mode SFP instead when the installation stays inside a climate-controlled cabinet, since the optical budget is the same at a lower net weight.
Specification
Full specification
General 2
| product type designation | SFP991-1LD A SCALANCE X accessory; Active plug-in transceiver SFP991-1LD A; 1x 100 Mbit/s LC port, optical; single-mode optical up to max. 26 km. |
|---|---|
| product brand name | SCALANCE |
Interfaces 11
| number of electrical/optical connections / for network components or terminal equipment / maximum | 1 |
|---|---|
| number of optical interfaces / for network components or terminal equipment / maximum | 1 |
| number of 100 Mbit/s LC ports | 1 |
| design of the optical interface / for network components or terminal equipment | LC |
| wavelength / of the optical interface | 1310 nm; Single-mode |
| connectable optical power relative to 1 mW: of the transmitter output / minimum | -15 dB |
| connectable optical power relative to 1 mW: of the receiver input / maximum | -8 dB |
| optical sensitivity relating to 1 mW / of the receiver input / minimum | -31 dB |
| attenuation factor / of the FOC transmission link / minimum necessary | 0 dB |
| range / at the optical interface / depending on the optical fiber used | 0 ... 26 km |
| transmission method / for connection type 1 | 100BASE-LX |
Ambient conditions 6
| ambient temperature: during operation | -40 ... +95 °C |
|---|---|
| ambient temperature: during storage | -40 ... +95 °C |
| ambient temperature: during transport | -40 ... +95 °C |
| ambient temperature: note | A maximum operating temperature of +95 °C is permissible for a duration of 16 hours. |
| relative humidity / at 25 °C / without condensation / during operation / maximum | 95 % |
| protection class IP | IP20 |
Show all 57 specifications ↓ Show less ↑38 more values in Identification, Design, dimensions and weights, Standards, specifications, approvals / Environmental Product Declaration, Security information, Logistics.
Identification 10
| Part number | 6GK5991-1AF00-8GA0 |
|---|---|
| Type designation | SFP991-1LD A SCALANCE X accessory; Active plug-in transceiver SFP991-1LD A; 1x 100 Mbit/s LC port, optical; single-mode optical up to max. 26 km. |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4047622859636 |
| ETIM class | EC003628 |
| eCl@ss | 19170302 |
Design, dimensions and weights 14
| design | SFP Module |
|---|---|
| width | 14 mm |
| height | 9 mm |
| depth | 57 mm |
| fastening method | latched |
| standards, specifications, approvals standard: for hazardous zone | EN 60079-0: 2006, EN60079-15: 2005, II 3 G Ex nA II T4, KEMA 07 ATEX 0145 X |
| standards, specifications, approvals standard: for safety / from CSA and UL | UL 62368-1 and CAN/CSA C22.2 No. 62368-1:19 |
| standards, specifications, approvals standard: for emitted interference | EN 61000-6-4:2007 (Class A) |
| standards, specifications, approvals standard: for interference immunity | EN 61000-6-2:2005 |
| certificate of suitability | EN 61000-6-2:2005, EN 61000-6-4:2007 |
| CE marking | Yes |
| C-Tick | Yes |
| KC approval | No |
| MTBF | 370 a |
Standards, specifications, approvals / Environmental Product Declaration 5
| Environmental Product Declaration | Yes |
|---|---|
| global warming potential [CO2 eq]: total | 32.31 kg |
| global warming potential [CO2 eq]: during manufacturing | 2.2 kg |
| global warming potential [CO2 eq]: during operation | 30.1 kg |
| global warming potential [CO2 eq]: after end of life | 0.01 kg |
Security information 2
| Approvals / Certificates | For use in hazard- |
|---|---|
| General Product Approval | ous locations China RoHS |
Logistics 7
| Net weight | 0.3 kg |
|---|---|
| Package dimensions | 57 × 14 × 9 mm |
| Country of origin | Taiwan, China |
| Shipping weight | 0.8 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
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Certifications
Certifications and standards
- CE
- CE marking
- C-Tick
- Environmental Product Declaration
Quick answers
Questions about the SFP991-1LD A SCALANCE X accessory; Active plug-in transceiver SFP991-1LD A; 1x 100 Mbit/s LC port, optical; single-mode optical up to max. 26 km.
What is the HS code of SFP991-1LD A SCALANCE X accessory; Active plug-in transceiver SFP991-1LD A; 1x 100 Mbit/s LC port, optical; single-mode optical up to max. 26 km. for customs?
The tariff (HS) code on file for SFP991-1LD A SCALANCE X accessory; Active plug-in transceiver SFP991-1LD A; 1x 100 Mbit/s LC port, optical; single-mode optical up to max. 26 km. is 85176200.
What is the EAN of SFP991-1LD A SCALANCE X accessory; Active plug-in transceiver SFP991-1LD A; 1x 100 Mbit/s LC port, optical; single-mode optical up to max. 26 km.?
The EAN (GTIN) of SFP991-1LD A SCALANCE X accessory; Active plug-in transceiver SFP991-1LD A; 1x 100 Mbit/s LC port, optical; single-mode optical up to max. 26 km. is 4047622859636.
Where does SFP991-1LD A SCALANCE X accessory; Active plug-in transceiver SFP991-1LD A; 1x 100 Mbit/s LC port, optical; single-mode optical up to max. 26 km. ship from, and how fast?
SFP991-1LD A SCALANCE X accessory; Active plug-in transceiver SFP991-1LD A; 1x 100 Mbit/s LC port, optical; single-mode optical up to max. 26 km. ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
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Customer reviews
Series
Siemens SCALANCE X
- Brand
- Siemens
- Series
- SCALANCE X
