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H1278NLT
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Product Detailed Parameters
- Description：XFRMR MODULE 1PORT 1:1 10/100
- Series：-
- Mfr：Pulse Electronics
- Package：Tape & Reel (TR)
- Transformer Type：Isolation and Data Interface (Encapsulated)
- Inductance：-
- ET (Volt-Time)：-
- Turns Ratio - Primary:Secondary：1:01
- Mounting Type：Surface Mount
- Size / Dimension：0.583" L x 0.460" W (14.81mm x 11.68mm)
- Height - Seated (Max)：0.202" (5.13mm)
- Operating Temperature：0°C ~ 70°C
- Grade：-
- Qualification：-
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Overview
The H1278NLT is a single-port LAN transformer module manufactured by Pulse Electronics Corporation. Designed for surface-mount technology (SMD/SMT) applications, this component supports 10/100BASE-T Ethernet standards with Power over Ethernet (PoE) capability. It features a 1:1 isolation ratio and operates within a frequency range of 100 kHz to 100 MHz. The unit provides 1.5 kV insulation voltage and maintains an inductance of 350 uH. It functions reliably between -40°C and +125°C, housed in a compact shielded package suitable for high-density circuit board layouts.
Feature Summary
- Supports 10/100BASE-T Ethernet signaling with integrated Power over Ethernet functionality
- Provides galvanic isolation via 1:1 transformer ratio and 1.5 kV insulation rating
- Engineered for surface-mount assembly with shielded construction to minimize interference
Applications
- 10/100BASE-T network interface circuits
- Power over Ethernet enabled devices
- Ethernet switch port interfaces
Procurement Notes
Verify the specific datasheet revision and RoHS compliance status directly with the manufacturer or authorized distributor before integration. Confirm that the shielding type and PoE configuration align with the target system requirements. Ensure compatibility with the intended soldering profile and operating temperature range specified in the official documentation.
Selection Notes
Select this component when designing 10/100 Mbps Ethernet links requiring PoE support. Compare physical dimensions against available PCB real estate. Evaluate thermal performance relative to the stated maximum operating temperature. Consider the SMD footprint compatibility with existing assembly equipment and design rules.
Part Context
This part belongs to Pulse Electronics' LAN Transformer series, specifically engineered for network connectivity modules. It serves as a critical interface component between the PHY chip and the RJ45 connector, ensuring signal integrity and electrical isolation for standard Ethernet communications.
Replacement Considerations
Consult official substitution guides from Pulse Electronics for verified alternatives. Cross-reference pinouts, inductance values, and physical dimensions to ensure mechanical and electrical compatibility without redesigning the host circuit.
