EMI0603R-80 Replacement: EMI0603R-68, GZ1608U800CTF

Original Part

EMI0603R-80

Delevan

80 Ohms @ 100 MHz 1 Ferrite Bead 0603 (1608 Metric) 400mA 100mOhm

Alternative Part

EMI0603R-68

Delevan

68 Ohms @ 100 MHz 1 Ferrite Bead 0603 (1608 Metric) 600mA 100mOhm

GZ1608U800CTF

Shenzhen Sunlord Electronics Co., Ltd.

80 Ohms @ 100 MHz 1 Signal Line Ferrite Bead 0603 (1608 Metric) 600mA 100mOhm

1. EMI0603R-68 Substitution Conclusion As a close equivalent from the same manufacturer (Delevan), the EMI0603R-68 is physically compatible with the original EMI0603R-80, sharing identical package dimensions and DC resistance (DCR). It offers a higher rated current (600mA), providing greater design margin. The key difference is its reduced nominal impedance, from 80 ohms to 68 ohms (@100MHz). This directly results in lower noise suppression (attenuation) capability near the target frequency of 100MHz compared to the original design. If the circuit has strict filtering requirements or minimal margin at 100MHz, direct substitution may lead to insufficient EMI performance. However, if the original design has ample margin or relaxed attenuation curve requirements, and the increased current capability is prioritized, this part can be considered as a derated alternative.

2. GZ1608U800CTF Substitution Conclusion Sunlord's GZ1608U800CTF closely matches the key electrical parameters of the original EMI0603R-80: its impedance (80 ohms @100MHz) and DC resistance (100mOhm) are identical, ensuring equivalent noise suppression at the target frequency. It also offers a superior rated current (600mA). The differences lie in the manufacturer/brand and associated supply chain change, its specified application for "signal line" use (typically implying optimized high-frequency characteristics, though the original part lacked such a designation), and a minor width tolerance variance (0.031” vs. 0.032”). This dimensional difference falls within the acceptable soldering tolerance for a 0603 package and does not affect mounting. Electrically, it is a near-perfect direct substitute, but sample validation and batch reliability confirmation with the new supplier are recommended.

Analysis ID: 7356-B50B000

Based on part parameters and for reference only. Not to be used for procurement or production.