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The SM13126PEL is a high-performance, surface-mount LAN pulse transformer from Bourns' SM series, specifically designed for 10/100 Base-T Ethernet interfaces and Power over Ethernet (PoE) applications compliant with IEEE 802.3af/at standards. This AEC-Q200 automotive-qualified component integrates data signal coupling/isolation, power transfer, and common-mode noise rejection into a single device, ensuring stable and reliable network communication and remote device power delivery in demanding automotive and industrial environments.
Category:Transformers;Pulse Transformers
Manufacturer:Bourns Inc.
Series:SM
Packaging:Tape & Reel (TR);Cut Tape (CT)
Part Status:Active
Transformer Type:LAN 10/100 Base-T, Power over Ethernet (PoE)
Inductance:350µH
Turns Ratio - Primary:Secondary:1:1
Mounting Type:Surface Mount
Size / Dimension:0.504" L x 0.272" W (12.80mm x 6.90mm)
Height - Seated (Max):0.222" (5.65mm)
Operating Temperature:-40°C ~ 85°C
Grade:Automotive
Qualification:AEC-Q200
Integrated Data & Power Coupling: Combines the functions of a complete 10/100M Ethernet data transformer and PoE power coupling inductor within a single package, simplifying RJ45 port circuit design and saving PCB space and BOM cost.
Automotive-Grade Reliability & Certification: AEC-Q200 qualified, ensuring the device meets stringent automotive requirements for temperature cycling, vibration, and long-term reliability, making it suitable for direct use in in-vehicle network nodes.
High-Performance Electrical Isolation: Provides high inter-winding isolation voltage (typically 1500Vrms or more), effectively protecting PHY chips from lightning strikes, ESD, and power surges introduced via external cables.
Excellent Signal Integrity: Optimized winding design and core material ensure a flat frequency response from low frequencies to over 100MHz, supporting high-fidelity transmission of high-speed data signals.
Strong Common-Mode Rejection: Effectively suppresses common-mode noise introduced by cables, significantly improving the signal-to-noise ratio and noise immunity of the communication link.
Compact SMD Package: Utilizes a standard surface-mount package, facilitating automated assembly and meeting the requirements of modern high-density electronic equipment.
Wide Temperature Operation: Supports an ambient temperature range from -40°C to 85°C, adaptable to harsh operating environments such as industrial settings and automotive engine compartments.
In-Vehicle Infotainment Systems: Connecting head units to rear-seat entertainment displays, audio amplifiers, etc.
Advanced Driver-Assistance Systems (ADAS): Used in Ethernet interfaces for connecting cameras, radar sensors.
Vehicle Gateways & Domain Controllers: Enabling high-speed, reliable data exchange between different network domains.
Industrial Switches & Routers: Providing network access and PoE power for factory automation equipment.
Network Cameras & Security Devices: Used for data transmission and single-cable power in surveillance systems.
PoE-Powered Equipment: Such as wireless access points, IP phones, and sensor nodes (Powered Devices).
Smart Building Control Systems: Connecting PoE terminals for lighting, HVAC, security, etc.
Small Cells & Networking Equipment: Used for connections in Distributed Antenna Systems or edge computing nodes.
The SM13126PEL is an automotive-grade solution from Bourns that highly integrates a high-performance network data transformer with a PoE power inductor. It successfully combines AEC-Q200 certified reliability, excellent electrical isolation, outstanding signal integrity, and space-saving design. For automotive, industrial, and telecommunications applications that need to build stable, efficient, and remotely powered 10/100M Ethernet systems in harsh environments, this device is a market-proven, key interconnect component that significantly simplifies design and enhances system robustness.
Industry Information
