Panorama SA-SP-SJ Single-Strike Coaxial Surge Arrester with SMA Connectors

Panorama SA-SP-SJ Single-Strike Coaxial Surge Suppressor Protects Against Lightning Strikes

The SA-SP-SJ is a light-duty single-strike gas discharge surge arrester that protects electrical devices from over-voltage transients caused by external or internal events. It is fitted with SMA (male) to SMA (female) connectors allowing it to be installed in-line between the antenna and radio or router. The surge arrester operates up to 5.8 GHz and offers low return and insertion loss. One end has a bulkhead fitting that may be used to mount and ground the device to a conductive surface (thickness up to 4 mm or 0.16"). Alternatively, a heavy-duty grounding lead may be attached to the body.

The SA-SP-SJ surge arrester protects equipment from transients induced by lightning strikes or other significant electrical charges by preventing most of the voltage surge from entering equipment. It will not protect from a direct lightning strike. Under a high voltage surge, the economy Gas Discharge Tube (GDT) conducts and provides a low resistance path to ground, diverting the surge from reaching the equipment. It can handle a single strike and must be replaced following a surge because it won't return to a non-conductive state. The SA-SP-SJ allows DC to pass, so it can be used for an active GPS/GNSS antenna where a DC voltage is supplied on the cable to power the antenna LNA (Low Noise Amplifier).

Installation Options

A low resistance ground or earth point must be available for the surge protector to be effective. The preferred location is as close to the antenna as possible, connected to a grounding bar or earth strap. Alternatively, you may use an enclosure entry point, with the arrester bulkhead mounted to a low-resistance grounded panel.