Eaton SD150X Surge Protection Device with 150V DC / 120V AC, 3A Nominal Current, and 20kA Surge Capacity

The SD150X is a high-performance, high-current surge protection device (SPD) from Eaton's MTL SD series (Crouse-Hinds series), specifically engineered to safeguard sensitive electronic equipment, control systems, and field instrumentation from damaging voltage transients and lightning-induced surges on higher voltage loops.

With a nominal voltage rating of 150V DC / 120V AC and a high nominal current rating of 3A, the SD150X stands out from standard SD series models by supporting higher-power circuits while maintaining the series' signature ultra-slim DIN-rail form factor. The device features multistage hybrid protection circuitry with a maximum surge current capacity of 20kA.

Certified with ATEX for use in potentially explosive atmospheres (Zone 2), the SD150X is the trusted choice for industrial automation, process control, and instrumentation applications requiring robust, high-current protection.

The "X" suffix distinguishes this model from standard SD series models (SD07, SD16, SD32, SD55), which typically handle 400mA, making the SD150X suitable for higher-power circuits.

• High Current Capacity (3A): Handles nominal currents up to 3A — significantly higher than standard SD series models (400mA) — making it suitable for higher-power control loops and circuits
• High Voltage Rating (150V DC / 120V AC): Designed for applications requiring higher operating voltages, expanding protection capabilities beyond standard 7V-55V SD series models
• 20kA Maximum Surge Current: Provides robust protection against lightning strikes and power grid switching transients with multistage hybrid protection circuitry
• Ultra-Slim DIN Rail Mounting: Compact design for standard 35mm DIN rail (top hat rail) installation, saving valuable panel space in crowded electrical enclosures
• ATEX Certified: Certified under ATEX Directive 2014/34/EU for use in potentially explosive atmospheres (Cat3, Zone 2) — Certificate MTL03ATEX1527X
• Low Series Resistance (0.1 Ω/line): Minimizes signal degradation and power loss in the protected circuit
• High Bandwidth: Maintains signal integrity for data and communication lines
• 10-Year Product Warranty: Backed by Eaton MTL's industry-leading "No Fuss" warranty

The SD150X is specifically designed to protect higher-voltage, higher-current circuits in demanding environments:

• Higher Current Capability — Unlike standard SD series models (SD07, SD16, SD32, SD55) which are rated for 400mA, the SD150X handles 3A nominal current, making it suitable for higher-power circuits that standard models cannot protect.
• Higher Voltage Rating — With 150V DC / 120V AC rating, the SD150X extends protection capabilities beyond typical 7V-55V process I/O applications, covering a wider range of industrial control circuits.
• Certified for Hazardous Areas — ATEX certified (Cat3, Zone 2) with Certificate MTL03ATEX1527X, ensuring compliance for installations in potentially explosive atmospheres across Europe and internationally.
• Proven MTL SD Series Reliability — The SD series has been field-proven globally for high-performance surge protection with multistage hybrid circuitry, ultra-slim design, and 10-year warranty.

The SD150X is the high-current specialist in the SDX series, designed for circuits that demand both higher voltage protection and increased current handling.