Signal transformers and coupled inductor arrays provide inductive isolation, impedance matching, and common-mode filtering in signal and data path applications — used in CAN bus, RS-485, RS-232, SPI, I2C, and gigabit Ethernet interfaces for industrial automation, telecom equipment, and medical devices. Our signal transformer inventory covers coupled two-line and four-line arrays, signal isolation transformers, and pulse/isolation transformers from Bourns (SRF/SRF-HA series), TDK (ACT series), Würth Elektronik (WE-GFXI series), Pulse Electronics, and Coilcraft — with inductance values from 10µH to 10mH, current ratings from 10mA to 5A, and common-mode impedance from 10Ω to 1kΩ at 100MHz.
Specific signal transformer configurations for automotive CAN FD (up to 5 Mbps) and industrial RS-485 interfaces with specific creepage and clearance requirements are frequently subject to long lead times. Welllinkchips stocks standard and hard-to-find signal transformer configurations, including obsolete types needed for legacy telecom and industrial equipment repair.
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