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Quick Details

  • Place of Origin: China (Mainland)
  • Brand Name: Toptrans
  • Model Number: TOP-QSFP28+-100G-SR4
  • Rate: 100G
  • Wavelength: 850nm
  • Distance: SR4
  • Diagnostics: digital
  • Name: QSFP
  • Temperature: 0°C~70°C
  • Voltage supply: 3.3v
  • Module type: Pluggable
  • Warranty: 3 years
  • Application: Telecommunication

Packaging & Delivery

Packaging Details Anti-static package, standard packing
Delivery Time Shipped in 2 days after payment

Fiber transceiver QSFP28-100G-SR4 100G QSFP28 SR4 Compatible Neophotonics QSFP



QSFP28-100G-SR4 compatible 100G QSFP28 SR4 fiber transceiver is a Four-Channel, Pluggable, Parallel, Fiber-Optic QSFP28 Transceiver for 1000 Gigabit Ethernet Applications. This transceiver is a high performance module for short-range multi-lane data communication and interconnect applications.



 Topstar fiber transceiver is compatible with all brands including :Cisco, Nortel, Juniper, 3COM, HUAWEI, H3C, Alcatel-lucent, FOUNDRY, D-Link EXTREME, Ruijie, NETGEAR, ZTE, Enterasys, ZyXEL, Linksys, Ericsson, DCN, Allied, SMC, Brocade, Force10, Hirschmann, Planet, Adtran, ASNTE, Trendnet, BDCOM, BLADE, BITWAY,  Feixun...etc.



More Choices:





Packaging & Shipping


1. International ExpressDHL, FedEx, UPS, TNT and EMS

2. Customers specifying freight forwarders or negotiable shipping methods!

3Delivery Time: 1 working day after received payment


Payment Terms

1. Payment: T/T, Western Union, MoneyGram,HSBC, as well as Cash Payment

2. MOQ: 10pcs

3. Warranty :  3 years

4. Package Informations: according to quantity ,we can offer 1 by one in box ,or 10pcs in plastic box or 20pcs. and can do as required.


Our Services


1. 3 years warranty. 

2. Multi language services: English, Russian ,Italian and  Spanish etc. 

3. Reply inquiries within 1 hour and support online at 24*7. 

4. Over ten years experienced technical team support. 

5. Customized labels and packages, and ODM & OEM services offered.


Company Information



1. 100% new materials for production, the chips are purchased from international firms such as Maxim, CY,Mitsubishi etc. 

2. High quality products with ISO9001, RoHS, FCC, CE Certificates. 

3. Multiple detection: Raw materials detection, three rounds of testing for the optical and electrical properties, 24 hours aging test, compatibility testing on switches before delivery.



 1. Several production lines for producing different products at the same time.


 2. Perfect and wide compatibility. 3.Big capability of manufacture for  40,000~100,000 pieces of fiber optical module per month. 


 Our sales team and customer visiting



Alcatel QSFP-40G-SR

Q1. Are your transceiver modules compatible with Cisco? 

A1: Yes, Topstar  transceivers can compatible with Cisco. All the brand  Topstar's SFP compatible as the following:Cisco, Nortel, Juniper, 3COM, HUAWEI, H3C, Alcatel-lucent, FOUNDRY, D-Link,  EXTREME,  Ruijie, NETGEAR,  ZTE, Enterasys,ZyXEL, Linksys, Ericsson, DCN, Allied, SMC, Brocade, Force10, Hirschmann, Planet, Adtran, ASNTE, Trendnet, BDCOM, BLADE, BITWAY, Telco, Feixun...etc



Q2. How does your company do regarding quality control?

A2: Every single optic individually tested in our test center , and also tested for compatibility on a variety of different brands of network equipment



Q3. What are the trade terms?

A3: Lead Time:most popular optics in stock ,ready to ship.some of higher-value and specialize  optics  have a  short lead  time. 

        Payment term: Western union, T/T, Aliexpress escow, money gram ,cash payment

        Warranty:  3 year  



 Q4. What is operating temperature range of optical modules?

A4: Commercial temperature range(COM) : 0 to 70°C(32 to 158°F)

     Extended temperature range(EXT):-5 to 85°C(23 to 185°F)

     Industrial temperature range(IND)::-40 to 85°C(-40 to 185°F)

     Storage temperature range:-40 to +85°C(-40 to 185°F)


     We can supply according to your request. 




  • QSFP28-100G-SR4

  • 100G QSFP28 SR4

  • neophotonics 100g qsfp

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China (Mainland)
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Supplier's Trade Assurance Limit: US $50,000
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