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Transparent open power relay with four screw terminals and surface mount base

Dayton

Dayton 5YZ79 Surface Open Power Relay 40 A 4 Pins Screw 24V DC SPST-NO

SKU CH-YPD3-BYB5Z

A 24 V DC coil drives 40 A SPST-NO contacts rated for 300 V AC or 28 V DC with screw-clamp terminals

  • TypeIndustrial Electrical Controls & Automation
  • ColorTransparent
  • Handles 40 A AC loads up to 300 V
  • Switches 40 A DC circuits at 28 V
  • Drives 2 hp motors on 120 V and 240 V AC
  • 24 V DC coil suits standard control panels
  • Surface-mount screw terminals speed up installation

40 A 24 V DC Power Relay

This surface-mount relay switches loads up to 40 A at 300 V AC or 28 V DC with a 24 V DC coil. It is intended for control panels that need a single normally-open contact set in industrial and commercial equipment.

Four-pin screw-clamp wiring frees PCB space

Screw-clamp terminals accept ring or fork lugs directly, so no soldering or plug-in socket is required. The 2.5 in square footprint and 2.3 in height suit standard enclosure depths while leaving room for adjacent DIN-rail devices.

Silver cadmium oxide contacts handle motor loads

The contact material supports 2 hp at 120 V AC and 2 hp at 240 V AC, making the relay suitable for air-handling, elevator and HVAC circuits. No status indicator is fitted, so external monitoring must be added if visual confirmation is required.

Highlights

  • Handles 40 A AC loads up to 300 V
  • Switches 40 A DC circuits at 28 V
  • Drives 2 hp motors on 120 V and 240 V AC
  • 24 V DC coil suits standard control panels
  • Surface-mount screw terminals speed up installation

Specifications

BrandDAYTON
TypeIndustrial Electrical Controls & Automation
ColorTransparent

Questions about this item

How much current can the contacts carry continuously at 28 V DC?

The relay is rated for 40 A at 28 V DC, so that is the continuous current limit under sustained use.

How hot does the coil get when energised at 24 V DC all day?

The coil is designed for continuous 24 V DC operation; the silver-cadmium oxide contacts and open-frame design dissipate heat without a status indicator.

What mounting hardware is required to install this relay?

The relay uses a surface-mount style with screw-clamp terminals, so you need a flat panel and screws to secure the 2.5 in by 2.5 in base.

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