Page 65 - IDEC relay catalogue

Relays & Sockets RSS Series

Recommended Loads

Transformer Loads UL Motor Load Ratings (HP Ratings)
Transformer loads sometimes result in severe inrush current when the trans- Part Number 120V 240V 480V
former saturates during the fi rst cycle. Use a relay rated for this surge, which 10A 1/2 3/4 3/4 Switches & Pilot Lights
has a 1/2 cycle surge current greater than the maximum applied line voltage; the
transformer’s primary resistance (approximately 10x rated current). 25A 1/2 3/4 3/4
50A 3/4 1 1/2 1 1/2
75A 3/4 5 5
Recommended Loads
90A 3/4 5 5
SSR Rating at 120V AC at 240V AC
10A 500VA 1KVA Lamp Loads
25A 1KVA 2KVA
Zero voltage switching is ideal for driving incandescent lamps, since the cold
50A 2KVA 4KVA fi lament will not be subjected to a large inrush current. Using a zero-switched
SSR will reduce inrush current and prolong lamp life. Display Lights
Heater Loads
Recommended Loads
When using solid state relays for driving heaters where the load is switched on
and off rapidly and continuously, severe thermal stress will result. In such cases, SSR Rating at 120V AC at 240V AC
use an SSR relay at no more than 75% of the rating. 10A 1KW 2KW
25A 2KW 4KW
Recommended Loads 50A 3KW 6KW
SSR Rating at 120V AC at 240V AC
10A 1KW 2KW Internal Circuit Block Diagram Relays & Sockets
25A 2KW 4KW
50A 3KW 6KW

Solenoid Valves and Contactors
RSS relays use high-noise immunity circuitry with a built-in snubber to handle
the electrical noise generated by inductive loads.

Recommended Loads Timers

SSR Rating at 120V AC at 240V AC
10A 900W 1,800W
25A 2,100W 4,200W
50A 3,800W 7,500W
RSS series relays provide a highly reliable means of switching AC loads when
applied properly. Read the technical notes on the following page prior to install-
ing solid state relays. Terminal Blocks

USA: 800-262-IDEC Canada: 888-317-IDEC 787 Circuit Breakers