E1225E12B2-FSR-TTL

Overview

The E1225E12B2-FSR-TTL is a tubeaxial brushless DC fan from the Mechatronics Fan Group E1225 series. It features a square frame measuring 120mm in length and height, with a depth of 25.00mm. The unit operates at a rated voltage of 12VDC and draws a current of 0.580A. It utilizes ball bearings to achieve an airflow of 93.0 CFM (2.60m³/min) against a static pressure of 0.280 inches water column (69.7 Pa). The rotational speed is 3000 RPM, generating a noise level of 44.0dB(A). Key electrical features include a locked rotor sensor and thermal overload protection. The component terminates via three wire leads.

Feature Summary

• Integrated locked rotor sensor for operational monitoring
• Built-in thermal overload protection mechanism
• Ball bearing construction for durability

Applications

• Server rack cooling systems
• Industrial control cabinet ventilation
• Telecommunications equipment enclosures

Procurement Notes

Verify the specific suffix configuration when ordering. The TTL designation indicates the inclusion of a tachometer signal output in addition to standard power connections. Confirm that the receiving system supports the three-wire interface requirements. Ensure the mounting environment accommodates the specified acoustic output and physical dimensions. Cross-reference the datasheet for precise pinout definitions before integration into the final assembly design.

Selection Notes

Select this model for applications requiring high-speed axial airflow within a compact 120mm form factor. The 12VDC rating suits standard low-voltage power distribution networks. The combination of locked rotor detection and thermal protection offers enhanced reliability compared to basic models. Consider the 44.0dB(A) noise profile for environments with strict acoustic limitations. Verify that the required static pressure exceeds 69.7 Pa for the intended ducting or filter setup.

Part Context

This component belongs to the E1225 series, which defines the physical footprint and general performance characteristics of Mechatronics' 120mm square fans. The series utilizes PBT materials for both the frame and impeller to ensure flame resistance and structural integrity. Variations within the series typically differ by voltage rating, bearing type, and connector style, while maintaining consistent dimensional standards for interchangeability in existing chassis designs.

Replacement Considerations

Direct substitutes include E1225E12B2-FSR and E1225E12B2-WS. These variants share identical mechanical and core electrical specifications but may lack the specific TTL signal output or use different termination methods. Verify pin compatibility before swapping to ensure proper connection to the host board's tachometer input circuitry.

FAQ

What is the function of the third wire on the E1225E12B2-FSR-TTL?

The third wire provides a tachometer signal output, allowing the connected system to monitor the fan's rotational speed in real-time.

Does this fan include automatic restart capabilities after a fault?

Yes, the fan incorporates thermal overload protection which typically includes automatic restart functionality once the temperature returns to safe operating levels.