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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

  • Product typeIndustrial Electrical Controls & Automation
  • Product 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.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $10.99
Cheaper than about 85% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameDAYTON
Product typeIndustrial Electrical Controls & Automation
Product 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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