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CT-SFP-EX
Compatible optical transceiver

1000BASE-EX SFP 1310nm 40km DOM Duplex LC/UPC SMF Optical Transceiver Module

Form Factor: SFP
Max Reach: 40KM
Interface Type: LC
Media: SM
Part number CT-SFP-EX

1.25G SFP SM 1310NM 40KM

1.25 Gb/s intermediate-reach SFP optical transceiver supporting up to 40 km transmission over single-mode fiber, featuring a 1310 nm FP laser with PIN receiver, LC interface, and low-power operation for Ethernet, Fibre Channel, and telecom networks.

This transceiver is a compatible alternative for the following manufacturer part numbers: (13)

AT-SPLX40 XCVR-A40Y31 GLC-EX-SMD FN-TRAN-EX JD061A JD062A 02317346 34060298 S-SFP-GE-LH40-SM1550 EX-SFP-1GE-LX40K SFP-GE40KM 1AB376720006 3HE00867AA

Quality assured Tested, compliant and backed by lifetime warranty.

Lifetime Warranty
FCC Mark
CE Mark
RoHS Compliant
ISO 9001
ISO 14001
Hardware compatibility

Popular hardware this transceiver is compatible with:

The hardware listed below is a selection of key popular equipment, not a complete compatibility list. This transceiver may also be compatible with many other hardware models. Contact us and we can check the exact hardware you need.

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Product information

CT-SFP-EX Details

Review the technical specifications, applications, features, delivery information and warranty coverage for this product.

Specifications

01

The 1.25Gbps SFP Optical Transceiver is engineered for high-speed optical communication over single-mode fiber (SMF) up to 40 kilometers. This transceiver is housed in an SFP package with an LC connector, leveraging a 1310nm FP laser and PIN photo detector for reliable data transmission. It supports a data rate of 1.25Gbps, making it suitable for Ethernet, telecommunications, and Fiber Channel applications. The module operates on a single +3.3V power supply and features LVPECL-compatible data input/output interfaces, ensuring compatibility with a wide range of host systems. Its compliance with IEC-60825 laser safety standards and RoHS regulations underscores its commitment to safety and environmental responsibility.

Designed for diverse operational environments, the transceiver functions effectively within a supply voltage range of 3.15V to 3.45V. It operates across commercial (0°C to +70°C) and industrial (-40°C to +85°C) temperature ranges, with a maximum power dissipation of 1W. The transceiver’s low electromagnetic interference (EMI) and robust electrostatic discharge (ESD) protection ensure reliable performance in demanding conditions, making it a dependable choice for modern network infrastructures.

The optical performance of the transceiver is highlighted by its transmitter center wavelength of 1310nm, with an output power range of -5dBm to 0dBm. The extinction ratio between 10dB and 15dB ensures clear signal transmission. The receiver accommodates wavelengths from 1260nm to 1620nm, with a sensitivity of -24dBm and an overload threshold of 0dBm. This robust optical design adheres to IEEE 802.3z and ANSI Fiber Channel standards, ensuring high-quality signal integrity and protocol compatibility.

Electrically, the transceiver is engineered for versatility. It features a differential impedance of 100Ω and supports a data input swing differential of 500mV to 2400mV. The receiver section delivers a single-ended data output swing of 370mV to 2000mV. Control features such as TX Disable and TX Fault allow for precise operational management, while the Loss of Signal (LOS) detection provides fault monitoring capabilities.

Overall, the 1.25Gbps SFP Optical Transceiver combines advanced optical and electrical performance with energy efficiency and compliance with industry standards. Its design ensures reliable operation in various applications, making it a valuable component for high-speed networking solutions.

The CT-SFP-EX is a cost-effective hot-pluggable SFP transceiver designed for 1.25 Gb/s optical links up to 40 km on single-mode fiber. It integrates a 1310 nm FP laser transmitter with a PIN photodiode receiver, delivering reliable medium-range optical connectivity. Operating on a single +3.3 V supply with <1 W power consumption, the module provides LVPECL-compatible differential interfaces, EEPROM diagnostics, and strong EMI/ESD protection. Fully compliant with IEEE 802.3z Gigabit Ethernet, ANSI Fibre Channel, IEC-60825 Class 1 laser safety, and RoHS standards, it is available in commercial and industrial temperature grades.

Key Parameters

Parameter Value
Form factor / Connector SFP, LC duplex
Data rate 1.25 Gb/s
Tx wavelength 1310 nm, FP laser
Rx wavelength 1260–1620 nm
Fiber type / Reach SMF, up to 40 km
Tx output power –5 to 0 dBm
Extinction ratio 10–15 dB
Rx sensitivity ≤ –24 dBm (PIN)
Rx overload 0 dBm
LOS threshold Assert –36 dBm, Deassert –24 dBm
Power consumption ≤ 1 W
Supply voltage 3.15–3.45 V (nom. 3.3 V)
Electrical interface LVPECL-compatible differential I/O
EEPROM Serial ID (A0h), diagnostics (SFF-8472)

Environmental Ratings

Category Range
Operating case temperature (Commercial) 0 to +70 °C
Operating case temperature (Industrial) –40 to +85 °C
Storage temperature –40 to +85 °C
Relative humidity 5% – 95% (non-condensing)

Applications

02
  • Gigabit Ethernet links over SMF up to 40 km
  • Fibre Channel SAN and enterprise backbone interconnects
  • Metro and access telecom networks

Features

03
  • 1.25 Gb/s SFP transceiver with 1310 nm FP transmitter and PIN receiver
  • Supports up to 40 km reach over single-mode fiber
  • Hot-pluggable SFP with LC connector
  • Low power (<1 W), single +3.3 V supply operation
  • LOS, TX_DISABLE, and TX_FAULT monitoring functions
  • EEPROM with serial ID and digital diagnostics (SFF-8472 compliant)
  • IEC-60825 Class 1 laser safety and RoHS compliance

Delivery

04

At Carritech, we pride ourselves on our exceptional service and commitment to meeting our customers’ needs. Our extensive range of SFP transceivers, including the CT-SFP-EX, is designed to cater to various requirements, ensuring that you receive the best solutions for your projects. We understand the importance of timely delivery, and our efficient processes are geared towards providing you with the products you need as quickly as possible. Our dedicated team works tirelessly to ensure that your orders are processed and dispatched promptly, so you can rely on us for swift and reliable service.

We recognise that every project is unique, and our flexible approach allows us to adapt to your specific needs. Whether you require immediate delivery or have more complex requirements, we are here to support you every step of the way. Our commitment to customer satisfaction means that we go above and beyond to ensure that you receive your SFP transceivers in a timely manner, without compromising on quality. Trust Carritech to deliver the solutions you need, when you need them.

Warranty

05

At Carritech Optics, we stand by the quality and reliability of our optical transceivers. That’s why we proudly offer a lifetime warranty on all products as a testament to our commitment to excellence and customer satisfaction.

What Does Our Lifetime Warranty Cover?

Our lifetime warranty provides comprehensive coverage for the entire lifecycle of your optical transceivers, ensuring you experience complete peace of mind when choosing Carritech Optics. The warranty covers:

  • Defects in Materials and Workmanship: If your product experiences any issues related to manufacturing or materials, we’ll repair or replace it free of charge.
  • Performance Assurance: Our optical transceivers are rigorously tested to meet industry standards, and we guarantee they’ll perform as expected in your network environment.

Easy Claims Process

Should you ever need to make a warranty claim, our team is here to assist you. Simply contact our support team with your product details, and we’ll guide you through a quick and hassle-free process to resolve the issue.

Your Network’s Performance, Guaranteed

Carritech Optics is dedicated to providing high-quality optical solutions that you can trust for the long haul. With our lifetime warranty, you can confidently invest in our products, knowing that we’re with you every step of the way.

Datasheet

06

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Fast Worldwide Delivery

We ship to over 100 countries, ensuring your parts reach you quickly and reliably wherever your business operates.

Extensive Global Inventory

Thousands of optical transceivers in stock and ready to ship, helping you keep your networks running without delay.

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1000BASE-EX SFP 40km