PA1277NL

Pulse Transformers Overview

The PA1277NL is a high-frequency wire wound pulse transformer from the EP10 series, manufactured by Pulse Electronics. Designed for surface mount installation, this encapsulated component provides isolation and data interface capabilities. It features an inductance of 20.4µH and a turns ratio of 1:0.222:0.555. The device supports a power rating of 10W at 3.3V and operates within a temperature range of -40°C to 125°C. Physical dimensions are 13.08mm x 15.24mm with a maximum seated height of 11.45mm. It complies with ROHS3 standards and has a Moisture Sensitivity Level of 1.

Pulse Transformers Feature Summary

• Encapsulated construction for reliable isolation and data interface applications
• High-frequency wire wound design optimized for efficient signal transmission
• Surface mount packaging facilitates automated assembly processes

Pulse Transformers Applications

• Power over Ethernet (PoE) systems
• Isolated data communication interfaces
• High-frequency switching power supply circuits

Pulse Transformers Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to ensure correct packaging configuration. Confirm that the selected variant matches the required RoHS compliance and moisture sensitivity level for the intended manufacturing process. Cross-reference the DigiKey part numbers with official distributor listings to validate availability and standard lead times before finalizing procurement plans.

Pulse Transformers Selection Notes

Select this component when designing circuits requiring a 20.4µH primary inductance and specific voltage transformation ratios for PoE or isolated data links. Ensure the PCB footprint accommodates the 13.08mm x 15.24mm dimensions and 11.45mm height. Consider the -40°C to 125°C operating range to verify suitability for the environmental conditions of the target application.

Pulse Transformers Part Context

This transformer belongs to the EP10 series of high-frequency wire wound components. It serves as a critical element in modern networking and power delivery infrastructure, bridging the gap between low-voltage digital logic and higher-power isolated domains. Its encapsulated form factor distinguishes it from open-wound alternatives, offering enhanced protection against environmental factors.

Pulse Transformers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.