ST7700 Series photocontrols are constructed with costs effective materials and are designed specifically to replace mechanical photocontrols. The ST7700 Series can be expected to have better On to Off ratios, a higher level of reliability, and longer life than mechanical designs. ST7700 Series photocontrols are not recommended for present users of Sun-Tech S Series or P Series designs.

• Meets or exceeds ANSI C136.10.
• Heavy Duty Relay.
• Average 3:1 On to Off ratio.
• Non-chatter load break.

• Industry Standard Operating Levels.
• Extended relay life from non-chatter load break.
• Extended photocell life from low voltage DC.
• Reduced maintenance costs.

Model	Voltage	Color
ST7760	105 - 130	Gray
ST7790B	105 – 305	Blue
ST7772	195 – 305	Maroon
ST7794	420 - 530	Yellow

Load Rating:
1000 Watt tungsten, 1800 VA

Life at rated load:
5,000 Operations (13.7 Years)

Power Consumption:
1.0 watts average @ 120 volts
1.6 watts average @ 208 volts
1.9 watts average @ 240 volts
2.1 watts average @ 277 volts

• 160 Joule MOV.

Operating Light Levels:
+/- 0.25 fc. from specified turn-on level.
3:1 Average turn-on to turn-off ratio.

Photosensor:

• Conformally coated cadmium sulfide
• Photo transistor.
  

Dielectric Strength:
5,000 Volts between any current carrying part.

Ambient Temperature Range:
-40°C to +70°C (-40°F to + 158°F).

Moisture Resistance:
100% RH.