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HM1225NL
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Product Detailed Parameters
- Description：PULSE XFMR 1CT:1CT TX 1CT:1CT RX
- Series：-
- Mfr：Pulse Electronics
- Package：Tube
- Transformer Type：LAN 10/100 Base-T
- Inductance：200µH
- ET (Volt-Time)：-
- Turns Ratio - Primary:Secondary：1CT:1CT Transmitter, 1CT:1CT Receiver
- Mounting Type：Surface Mount
- Size / Dimension：0.500" L x 0.280" W (12.70mm x 7.11mm)
- Height - Seated (Max)：0.235" (5.97mm)
- Operating Temperature：-40°C ~ 95°C
- Grade：-
- Qualification：-
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Overview
The HM1225NL is a surface-mount LAN transformer manufactured by Pulse Electronics, designed for Ethernet applications. It features a single primary winding and a single secondary winding configuration with a 1:1 turns ratio. The component supports operating frequencies from 1 MHz to 100 MHz and provides an isolation voltage of 1.5 kV. Key electrical parameters include an inductance of 200 µH and a maximum DC resistance of 0.3 Ohms. It operates within a temperature range of -40°C to +95°C.
Feature Summary
- Integrated LAN transformer module supporting 10/100 Base-T Ethernet standards
- Surface-mount construction for automated PCB assembly
- Single-port design with 1:1 transmission ratio for signal integrity
Applications
- 10/100 Base-T Ethernet network interface circuits
- Local Area Network (LAN) equipment
- Ethernet magnetics modules requiring compact SMD form factors
Procurement Notes
Verify the specific datasheet revision and RoHS compliance status directly with Pulse Electronics or authorized distributors before procurement. Confirm that the single-port configuration aligns with the target circuit design requirements. Ensure storage conditions account for moisture sensitivity levels if applicable. Cross-reference the pinout diagram with the PCB layout to prevent installation errors during assembly.
Selection Notes
Select this component when a single-channel Ethernet transformer is required for 10/100 Mbps data rates. The 200 µH inductance value suits standard LAN impedance matching needs. Consider the 1.5 kV isolation rating for safety compliance in low-voltage network interfaces. The SMT package facilitates high-volume manufacturing processes compared to through-hole alternatives.
Part Context
This part belongs to the Pulse Electronics LAN transformer portfolio, specifically engineered for Ethernet connectivity solutions. It serves as a critical magnetics component for isolating and coupling differential signals in network ports. The product line emphasizes reliability and compactness for modern electronic devices requiring robust data transmission capabilities.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs using official cross-reference tools from the manufacturer.
