Avocent Cybex SC820H Secure EAL4+ KVM
Best secure switch for professionals handling highly sensitive data.
The Avocent Cybex SC820H is a 2-port secure desktop KVM switch designed for high-security environments, meeting stringent NIAP Protection Profile V3.0 standards. It ensures data isolation with discrete processing paths and unidirectional data flow, preventing leakage. This model supports single-monitor setups with HDMI 1.4, delivering crisp UHD 4K resolutions up to 3840x2160 @ 30Hz. Enjoy seamless operation with zero-delay switching, audio support, and convenient Num Lock/Caps Lock indicators, balancing robust security with user productivity.
$604.94
Owner Satisfaction
4.5
/ 5
Category Rank
114
/ 1363
#114 in KVM Switches
Price vs Category Average
-44%
Below average
Ports
2
/ Computer Ports
Who it's for
- Security officers needing verifiable protection against physical hardware tampering
- Government and defense contractors requiring top-tier data isolation
- IT professionals managing complex, multi-classification workstation environments
Who should skip it
- Gamers or creative professionals requiring high-refresh-rate display performance
- Budget-conscious buyers seeking standard commercial KVM functionality
- Users relying on specialized USB peripherals like webcams or headsets
Performance breakdown
Security Compliance
NIAP Protection Profile V3.0 certification ensures top-tier data isolation.
Visual Fidelity
Crisp 4K resolution support, though limited by a 30Hz refresh rate.
Switching Speed
Zero-delay switching provides an instantaneous transition between secure computer systems.
Anti-Tamper Integrity
Active physical security measures effectively prevent unauthorized hardware access or tampering.
Connectivity Versatility
Limited to two ports and HDMI, prioritizing security over multi-device flexibility.
Build Quality
Compact, durable chassis designed for reliable performance in high-stakes environments.
Key Specs
Ports
2 Computer Ports
Video Interface
HDMI 1.4
Maximum Resolution
UHD 4K (3840x2160 @ 30 Hz)
Dimensions
7 in (W) x 2.4 in (D) x 1.7 in (H)
Weight
1.0 lbs (0.5 kg)
Operating Voltage
100 to 240VAC
Certifications
RCM, EU, FCC Class B, VCCI, c-UL
Warranty
2 Years
Features
- Meets NIAP Protection Profile V3.0 security standards
- Unidirectional data diode for isolation
- Active anti-tampering system
- Prevents DDC signal leakage
- Zero delay switching
- Supports UHD 4K resolution
- Flexible audio device assignment
- Num Lock, Caps Lock, Scroll Lock indicators
What customers say
Specialized users overwhelmingly trust the Avocent Cybex SC820H for its mission critical reliability and robust security. The mandatory EAL4+ certification is the primary driver of positive feedback, providing essential assurance against data leakage in high security settings. Customers confirm the device operates flawlessly in demanding 24/7 environments, reflecting its durable, high quality construction. While the initial cost is high, users consider it a necessary investment for compliance and security peace of mind. Minor configuration challenges are accepted trade-offs for this uncompromising dependability. This KVM is viewed as an essential security component.
Know before you buy
This KVM switch is certified to meet the NIAP Protection Profile V3.0 standards. It features an active anti-tampering system and unidirectional data diodes to ensure complete data isolation between connected computers.
Yes, the SC820H supports UHD 4K resolutions up to 3840x2160. Please note that the maximum refresh rate at this resolution is 30Hz.
Switching is handled via physical push buttons located on the device. This manual switching method is a deliberate security feature to prevent unauthorized remote access or software-based switching.
Yes, it includes a 3.5mm jack for audio support. The device allows for flexible audio device assignment, ensuring sound is routed correctly to the active computer.
No, this is a hardware-based KVM switch that does not require any drivers or software installation. It provides keyboard and mouse emulation to ensure seamless operation immediately upon connection.
The SC820H uses HDMI 1.4 ports for both the monitor and the computer connections. You will need standard HDMI cables to connect your peripherals to the switch.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$605