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Transparent IEC control relay with screw terminals and DIN rail mounting

Schneider Electric

Schneider Electric CA3KN40BD IEC Control Relay 4NO 24V DC 10A

SKU CH-SJ5B-06E9Q

IEC control relay with four normally open contacts, 10 A AC rating, 24 V DC coil and DIN-rail or surface mounting

  • TypeIndustrial Electrical Controls & Automation
  • ColorTransparent
  • IEC-standard relay integrates with TeSys K control systems
  • Four normally-open contacts switch 10 A AC loads at up to 600 V
  • 24 V DC coil draws only 3 W for efficient panel operation
  • Screw-clamp terminals accept DIN-rail or surface mounting in 1.77 in width
  • IP2X-rated transparent housing withstands 122 °F maximum operating temperature

IEC Control Relay for 24 V DC Panels

The Schneider Electric CA3KN40BD is a 4NO IEC control relay rated at 10 A AC and 2 A DC. It operates from a 24 V DC coil drawing 3 W and mounts on DIN rail or flat surfaces. Panel builders and maintenance engineers use it for switching small motors, contactor coils or indicator circuits in industrial cabinets.

Contact Ratings Define Safe Switching Limits

AC loads up to 10 A at 120, 240, 480 or 600 V are within rating. DC loads are limited to 2 A at 125, 250 or 600 V because the silver-nickel contacts cannot break higher DC arcs. Exceeding these values causes contact welding or premature wear, so the relay must be matched to the actual load type and voltage.

DIN Rail Clip and Screw Clamps Simplify Wiring

The relay snaps onto standard DIN rail and also accepts surface-mount screws through its base. Screw-clamp terminals accept stripped conductors without ferrules, but overtightening can crack the transparent housing. Verify coil polarity before energising; the 24 V DC coil is not protected against reverse voltage.

Highlights

  • IEC-standard relay integrates with TeSys K control systems
  • Four normally-open contacts switch 10 A AC loads at up to 600 V
  • 24 V DC coil draws only 3 W for efficient panel operation
  • Screw-clamp terminals accept DIN-rail or surface mounting in 1.77 in width
  • IP2X-rated transparent housing withstands 122 °F maximum operating temperature

Specifications

BrandSCHNEIDER ELECTRIC
TypeIndustrial Electrical Controls & Automation
ColorTransparent

Questions about this item

Should I pick the 4NO version or a different contact configuration?

The CA3KN40BD has four normally open contacts rated 10 A AC at 120/240/480/600 V and 2 A DC at 125/250/600 V. Choose this version when you need four make contacts; other configurations offer NC or changeover poles instead.

What does the 10 A rating mean when the relay is installed in a panel?

It means each of the four poles can switch up to 10 A at 120/240/480/600 V AC or 2 A at 125/250/600 V DC, with a 24 V DC coil drawing 3 W, within a maximum ambient temperature of 122 °F.

How does the screw-clamp connection limit the wire size I can use?

The screw-clamp terminals are designed for the relay's 10 A rating and DIN-rail or surface mounting; they accept conductors suited to that current level and the IP2X finger-safe housing.

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