Littelfuse ALT-100-1-SW Alternating Duplex Pump Relay With Switch Description

The ALT-xxx-1-SW/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 OTC11PC Socket for the 11-Pin Models, for UL Rating!

Littelfuse ALT-100-1-SW Alternating Duplex Pump Relay With Switch Typical Applications

• Duplex Control Panels

Littelfuse ALT-100-1-SW Alternating Duplex Pump Relay With Switch Features

• Single Float Input and Two Isolated Form C Relay Outputs (DPDT)
• Debounce Time Delay (1 second)
• LED Load Indicators
• Built-In Switch to Manually Force a Specific Load (pump) to Operate
• 11-Pin Plug In; DIN Rail or Surface Mount
• UL Listed
• CE Marked
• 5-Year Warranty
• Made in the USA

Littelfuse ALT-100-1-SW Alternating Duplex Pump Relay With Switch Specifications

Supply Voltage . . . . . . . . . . . . . . 95-120 VAC

Frequency . . . . . . . . . . . . . . 50/60 Hz

Debounce Time Delay . . . . . . . . . . . . . . 1 second

Output Relay

• DPDT. . . . . . . . . . . . . . . . . . . . .480VA @ 240VAC Pilot Duty
• . . . . . . . . . . . . . . . . . . . . .10A @ 240VAC General Purpose

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

Maximum Input Power . . . . . . . . . . . . . . . . . . . . . 5 W

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

Safety Marks

Weight . . . . . . . . . . . . . . . . . . . . . . . . 10.4 oz.

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

The sockets can be surface mounted or installed on DIN Rail

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Littelfuse ALT-100-1-SW Alternating Duplex Pump Relay With Switch Resources

Littelfuse ALT-100-1-SW Product Specifications

Littelfuse ALT-100-1-SW Installation Bulletin

Littelfuse ALT-100-1-SW Engineering Bulletin