- Part number
- 6GK5991-4AB00-8AA0
- Model no
- MM991-4 (BFOC)
Siemens has announced the end of 6GK5991-4AB00-8AA0
Once production ends, supply depends on remaining stock.
No replacement announced yet. Tell us the application and we will propose an alternative.
- CE
SCALANCE XSiemens 6GK5991-4AB00-8AA0 SCALANCE X MM991-4 4x 100 Mbit/s BFOC Multimode 5 km Media Module
Siemens MM991-4 SCALANCE X media module: four 100 Mbit/s BFOC multimode ports, up to 5 km, IP20, 0-60 deg C.
Description
About the MM991-4 (BFOC)
About the MM991-4 (BFOC)
The Siemens 6GK5991-4AB00-8AA0 (MM991-4) is a SCALANCE X media module that adds four 100 Mbit/s BFOC/ST optical ports for multimode fiber. Each port covers a link of up to 5 km at 1310 nm, giving a switch four independent fiber segments from one media module slot. It operates from 0 to 60 degrees C, weighs 0.3 kg, and mounts in the module bay with a latched connector.
Certifications & Standards
- CE
- C-Tick
- KC
- BV
- EPD
Selection Notes
The MM991-4 carries four independent 100 Mbit/s ST/BFOC ports on one media module, so it fits SCALANCE X switches that need to fan out to four multimode fiber runs instead of one. At 5 km per port on 1310 nm multimode, it covers plant-floor distances between cabinets; for longer single-mode spans in the same 100 Mbit/s family, the LC single-mode media module or SFP is the better choice, not this multimode module. Because all four ports share one card, a fault on the module affects all four links at once, which is a factor to weigh against using four single-port SFPs when link independence matters.
Specification
Full specification
General 3
| product type designation | MM991-4 (BFOC) |
|---|---|
| product description | XR-300 media module SCALANCE X accessory; Media module MM991-4; 4x 100 Mbit/s BFOC ports, optical; multimode optical up to max. 5 km. |
| product brand name | SCALANCE |
Interfaces 10
| number of electrical/optical connections / for network components or terminal equipment / maximum | 4 |
|---|---|
| number of optical interfaces / for network components or terminal equipment / maximum | 4 |
| number of 100 Mbit/s ST(BFOC) ports / for multimode / integrated | 4 |
| design of the optical interface / for network components or terminal equipment | ST/BFOC |
| wavelength / of the optical interface | 1310 nm; Multi-mode |
| connectable optical power relative to 1 mW: of the transmitter output / minimum | -19 dB |
| connectable optical power relative to 1 mW: of the receiver input / maximum | -3 dB |
| optical sensitivity relating to 1 mW / of the receiver input / minimum | -32 dB |
| attenuation factor / of the FOC transmission link / minimum necessary | 0 dB |
| range / at the optical interface / depending on the optical fiber used | 0 ... 5 km |
Ambient conditions 5
| ambient temperature: during operation | 0 ... 60 °C |
|---|---|
| ambient temperature: during storage | -40 ... +85 °C |
| ambient temperature: during transport | -40 ... +85 °C |
| relative humidity / at 25 °C / without condensation / during operation / maximum | 95 % |
| protection class IP | IP20 |
Show all 59 specifications ↓ Show less ↑41 more values in Identification, Design, dimensions and weights, Standards, specifications, approvals / Environmental Product Declaration, Declaration of Con- China RoHS Manufacturer Declara-, Logistics.
Identification 10
| Part number | 6GK5991-4AB00-8AA0 |
|---|---|
| Type designation | MM991-4 (BFOC) |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Phase-out announced by the manufacturer |
| EAN | 4019169233217 |
| ETIM class | EC001099 |
| eCl@ss | 19170301 |
Design, dimensions and weights 17
| design | Media module |
|---|---|
| width | 120.3 mm |
| height | 22.3 mm |
| depth | 275.5 mm |
| fastening method | latched |
| installation in media module slot | Yes |
| standards, specifications, approvals standard: for safety / from CSA and UL | UL 60950-1, CSA C22.2 No. 60950-1 |
| standards, specifications, approvals standard: for emitted interference | EN 61000-6-4 (Class A) |
| standards, specifications, approvals standard: for interference immunity | EN 61000-6-2 |
| certificate of suitability | EN 61000-6-2:2005, EN 61000-6-4:2007 |
| CE marking | Yes |
| C-Tick | Yes |
| KC approval | Yes |
| CCC / for hazardous zone according to GB standard | Yes; GB3836.1, GB3836.8 |
| CCC / for hazardous zone according to GB standard / as marking | Ex nA IIC T4 Gc |
| E1 approval | No |
| Marine classification association: French marine classification society (BV) | Yes |
Standards, specifications, approvals / Environmental Product Declaration 5
| Environmental Product Declaration | Yes |
|---|---|
| global warming potential [CO2 eq]: total | 141.62 kg |
| global warming potential [CO2 eq]: during manufacturing | 10.1 kg |
| global warming potential [CO2 eq]: during operation | 131.42 kg |
| global warming potential [CO2 eq]: after end of life | 0.1 kg |
Declaration of Con- China RoHS Manufacturer Declara- 2
| formity tion | For use in hazard- |
|---|---|
| General Product Approval EMV China RoHS | ous locations |
Logistics 7
| Net weight | 0.463 kg |
|---|---|
| Package dimensions | 57 × 14 × 9 mm |
| Country of origin | DE |
| Shipping weight | 0.963 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
Documents for 6GK5991-4AB00-8AA0
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Ask us for the datasheet
Certifications
Certifications and standards
- CE
- CE marking
- C-Tick
- KC approval
- French marine classification society (BV)
- Environmental Product Declaration
Quick answers
Questions about the MM991-4 (BFOC)
What is the HS code of MM991-4 (BFOC) for customs?
The tariff (HS) code on file for MM991-4 (BFOC) is 85176200.
What is the EAN of MM991-4 (BFOC)?
The EAN (GTIN) of MM991-4 (BFOC) is 4019169233217.
Where does MM991-4 (BFOC) ship from, and how fast?
MM991-4 (BFOC) ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
Reviews
Customer reviews
Series
Siemens SCALANCE X
- Brand
- Siemens
- Series
- SCALANCE X
