FPD - Fine, Multi-Stage Protector for DO-160 Applications
The FPD Fine Protector Series delivers advanced coaxial surge protection designed to meet the demanding requirements of RTCA/DO-160G Section 22, SAE ARP5416, and MIL-STD-461 CS117. Engineered for avionics and defense applications, these arrestors provide ultra-fast transient response, low let-through voltage (<60V), and broad frequency coverage from DC to 6 GHz — ensuring consistent protection across high-speed communication and control systems.
Each FPD unit incorporates a multistage filtered design, achieving superior suppression of both high-current lightning strikes and fast, high-frequency transient threats such as EMP and ESD. Constructed from aluminum housings with stainless steel connectors and gold-plated BeCu center pins, the FPD Series meets or exceeds MIL-STD environmental standards for vibration, temperature cycling, and immersion.
Tested and verified to withstand waveforms 1, 2, 3, 4, 5, and 5A at all voltage and current levels, the FPD Series ensures reliability in mission-critical installations. Configurations are available with SMA and N-type connectors, and models are qualified for operation across a temperature range of –50°C to +85°C.
Key Features and Benefits:
- Meets DO-160G Section 22 for indirect lightning protection
- Handles current levels up to 2000A and voltages up to 3200V
- Ultra-low let-through energy (<60V) ensures protection of sensitive electronics
- Multistage filtering minimizes insertion loss while maximizing surge suppression
- Environmental ratings: MIL-STD-202, IP68 (dust-tight, waterproof to 1m/24h)
- Available in SMA and N-type configurations for wide design compatibility
FPD Fine Protector Applicable Standards:
- RTCA-DO-160G; §22
- SAE ARP5416
- AirFramers Lightning Requirements
- Boeing D6-16050-5
- MIL-STD 461; CS117
*example product shown
Connector Types
- N-Type
- SMA
Frequency Range
- DC – 6 GHz
Threat Types
- Lightning [LEMP]
- Static [ESD]
- High Speed [EMP]
Design Highlights
- Filtered – Multistage Protector
FPD Fine Protector Applications
The FPD Series surge arrestors from NexTek are engineered for applications where lightweight, high-frequency, and mission-critical reliability are essential. Typical use cases include:
- Avionics and aircraft systems requiring DO-160G-qualified surge protection
- Defense communications and radar systems vulnerable to high-speed EMP events
- Aerospace platforms exposed to lightning, static discharge, or HIRF environments
- Remote sensing and telemetry operating across wide RF frequency bands
FPD Fine Protector Products
The FPD Fine Protector Series includes a range of high-performance surge arrestors engineered to meet specific voltage, connector, and frequency requirements. Each model is optimized for mission-critical applications where precision, reliability, and compliance with DO-160G lightning protection standards are essential.
- FPDSFSFHAP24-A: SMA female-to-female high-speed filtered fine protector for DO-160G Section 22 compliance
- FPDSFSFHE000-E: A multistage, directional SMA female-to-female coaxial surge protector designed for avionics and aerospace applications
- FPDNFNFHDP05-B: A multistage, directional Type N female-to-female coaxial surge protector with IP67-rated sealing
- FPDSFSFHG000-F: A high-frequency SMA female-to-female coaxial surge protector offering multistage, directional protection for broadband RF systems
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