Confirm the exact configuration
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.

Thorlabs
The Thorlabs 4013SA is a single stage fiber optic isolator operating at 1310nm, released on July 5, 2000. This component reached its discontinued date on April 7, 2008, and has been officially replaced by the IO-H-1310 model. Submit the exact part number, quantity, and application requirements for a quote on available inventory.
For a faster response, include quantity, condition, and delivery destination.
Verified configuration
Engineering context
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Our sourcing response is prepared against Thorlabs 4013SA. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.