SA3N5W-03 Replacement: 53AS105-K03N3, FMAT7461-3

Original Part

SA3N5W-03

Fairview Microwave

RF Attenuators 3dB 0 Hz ~ 3 GHz 50 Ohms 5W N-Type In-Line Module

Alternative Part

53AS105-K03N3

Rosenberger

RF Attenuators 3dB 0 Hz ~ 10 GHz 50 Ohms 5W N-Type In-Line Module

FMAT7461-3

Fairview Microwave

RF Attenuators 3dB 0 Hz ~ 12.4 GHz 50 Ohms 5W N-Type In-Line Module

1. 53AS105-K03N3 Substitution Conclusion The 53AS105-K03N3 is a fully compatible direct substitute for the original part, matching both electrical and mechanical interfaces. It maintains identical core specifications—3dB attenuation, 5W power handling, 50Ω impedance, and N-type connectors. However, its frequency range (0–10 GHz) is notably superior to the original's (0–3 GHz). This part maintains specified attenuation accuracy and favorable VSWR performance up to 10 GHz, offering performance headroom for the original design. In applications below 3 GHz, it provides improved frequency response flatness and stability, making it a qualified and performance-enhanced replacement option.

2. FMAT7461-3 Substitution Conclusion The FMAT7461-3 serves as a higher-performance direct substitute and is an excellent replacement for the original component. Sourced from the same manufacturer (Fairview Microwave), it ensures product line consistency while matching all key parameters (3dB, 5W, 50Ω, N-type). Its primary advantage is a significantly extended upper operating frequency of 12.4 GHz, far exceeding the original's 3 GHz limit. The device incorporates optimized internal circuit design and materials, delivering more precise attenuation, lower VSWR, and improved phase linearity across a broader bandwidth. For the original application frequency band, it provides substantial performance margin, making it an ideal choice for an upgrade replacement.

Analysis ID: CEC8-FC28000

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