Littelfuse ALT-100-3-SW, ALT Pump Controls Series, Alternating Relay DPDT, 95-120VAC, 8-pin Octal Mounting
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The ALT-xxx-3-SW Series are used to alternate between two loads and are commonly used in duplex pump-up and pump-down applications to balance the runtime of both pumps.
The ALT relays have a built-in debounce time delay that prevents the relay from changing state if the float momentarily bounces, and they have a built-in switch to manually force a specific load (pump) to operate each time the input float closes. This is helpful when performing periodic maintenance or pump repair.
Must use the OT08PC socket for the 8-pin models, and the OT11PC socket for the 11-pin models, for UL Rating!
*Note: Manufacturer’s recommended screw terminal torque for the OT Series Octal
The sockets can be surface mounted or installed on DIN Rail Sockets is 12 in.-lbs
Pre-order 6-8 Weeks
| Input Characteristics | |
| Supply Voltage | 95-120VAC |
| Frequency | 50/60Hz |
| Functional Characteristics | |
| Debounce Time Delay | |
| ALT-100-1-SW | 1 second |
| ALT-100-3-SW, ALT-200-3-SW | 5 seconds |
| Output Characteristics | |
| Output Relay (DPDT) |
Pilot Duty 480VA @ 240VAC General Purpose 10A @ 240VAC |
| General Characteristics | |
| Temperature Range | -40° to 70°C (-40° to 158°F) |
| Maximum Input Power | 5 W |
| Standards Passed | |
| Electrostatic Discharge (ESD) | IEC 61000-4-2, Level 3, 6kV contact, 8kV air |
| Radio Frequency, Radiated | 150MHz, 10V/m |
| Fast Transient Burst | IEC 61000-4-4, Level 3, 3.5kV input power and controls |
| UL (OT08PC or OT11PC octal socket required) | UL508 (File #E68520) |
| CE | IEC 60947-6-2 |
| Dimensions |
H 44.45 mm (1.75”) W 60.33 mm (2.375”) D 104.78 mm (4.125”) (with socket) |
| Weight | 0.65 lb. (10.4 oz., 294.84 g) |
| Mounting Method | DIN rail or surface mount (plug into OT08PC or OT11PC socket) |
| Sockets Available |
Model OT08PC UL Rating 600V Model OT11PC UL Rating 300V |