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Quick Details

  • Place of Origin: China (Mainland)
  • Brand Name: Toptrans
  • Model Number: TOP-SFP-1.25G-MMD
  • Wavelength: 850nm
  • Rate: 1.25G
  • Distance: 500m
  • Connector: Dual LC Connector
  • Diagnostics: digital
  • Name: DDM
  • Temperature: 0°C~70°C
  • Voltage supply: 3.3v
  • Module type: Pluggable
  • Warranty: 3years

Packaging & Delivery

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

Fiber optical module 1.25g MMF transceiver WTD RTXM191-551

Product Description
  • Transceiver unit with independent
  • VCSEL laser transmitter and PIN photo-detector
  • Up to 1.25Gbps data rate operation
  • Up to 550M transmission distance at 1.25Gbps
  • Standard serial ID information compliant with SFP MSA
  • SFP MSA package  with duplex LC connector
  • Digital Diagnostic Monitor Interface
  • Very low EMI and excellent ESD protection
  • +3.3V single power supply
  • RoHS compliant
  • Case operating temperature  Commercial: 0°C to +70°C Extended: -10°C to +80°C Industrial: -40°C to +85°C
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


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.





1 . What will you do if I found it has any quality problem?

Answer: We back up every sale with our risk-free money-back guarantee! 
You can buy with confidence from a company in good faith that has been serving its clients for over 10 years!

2. How does your company do regarding quality control?
Answer: We have professional testing equipment and QC team. Every unit will be double tested with perfect performance before shipping.

3. What are the trade terms?
Answer: Lead Time: 1 day after confirm your payment (In stock, we need 1 day to full test them)
             Payment term: Western union, T/T, Aliexpress escow, money gram 
             Warranty: 3 years  

Transaction History of the Supplier

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Transaction Overview


Transaction Details

This supplier has completedtransactions with buyers from .

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Transaction Value
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Trade Assurance
China (Mainland)
Transaction Level:
Supplier Assessments:
7 Transactions 2,000+
The supplier’s transactions conducted via Alibaba.com in the past 6 months.
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $40,000
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