SI3461-E01-GMR

Overview

The SI3461-E01-GMR is a Power Over Ethernet (PoE) controller designed for Powered Device applications, supporting the IEEE 802.3af standard. It operates within an input voltage range of 45 V to 57 V and draws a maximum supply current of 500 mA. The device supports a maximum power output of 15.4 W and features an internal auxiliary function. It is housed in an 11-QFN (3x3 mm) package with a exposed pad, suitable for surface mount installation. The component functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Supports IEEE 802.3af PoE standards for powered device integration
• Includes internal auxiliary function capability
• Operates within a wide input voltage range of 45 V to 57 V

Applications

• IEEE 802.3af compliant network endpoint devices
• VoIP telephones and wireless access points
• Security cameras and surveillance systems
• Industrial IoT sensors requiring PoE power

Procurement Notes

Verify the manufacturer designation carefully, as this part number is associated with both Silicon Laboratories and Skyworks Solutions depending on the source. Confirm the specific datasheet revision and RoHS compliance status before ordering. Ensure the 11-QFN package dimensions match your PCB footprint requirements. Check for any recent product change notifications that might affect pinout or electrical characteristics.

Selection Notes

Select this component when designing a Powered Device that requires strict adherence to the 802.3af standard. It is appropriate for applications needing a dedicated controller rather than an integrated switch solution. Consider the 15.4 W power limit and the 45-57 V input range during system design. Evaluate the thermal performance of the 11-QFN package for your specific enclosure constraints.

Part Context

This component belongs to the family of PoE controllers used in network infrastructure. It serves as a bridge between the PoE power source and the local load, managing power negotiation and delivery. Similar parts in the market include the SI34061 series, which supports higher power standards like 802.3at. The SI3461 is specifically optimized for legacy 802.3af deployments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official manufacturer cross-reference guides for compatible alternatives.