Features:

• 51020-D12 Railroad SPD module is designed for use in wayside enclosures where surge protection for critical railway electronic equipment is desired.
• Dry contact relay for remote monitoring capability, with two common terminals connected to the "C" common contact for easy daisy-chaining of downstream connections.
• Equipped with AAR terminals with Polarity markings for ease of installation with a standard linesman's insulated wrench.
• Real-time diagnostics are provided with LED indicators and audible alarm to indicate if surge protection is lost.
• Series (in-line) connected device with a circuit load capacity of up to 30 amps and a maximum continuous operating voltage of 17.8 VDC.