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Siemens 40EP32AF 3-pole magnetic contactor, grey enclosure, screw terminals, surface mount, 4.31 in high by 4.25 in wide

SIEMENS

SIEMENS 40EP32AF 120VAC Magnetic Contactor 3P 40A NEMA 1-3/4

SKU CH-D9DT-7YBDB

A 40 A three-pole magnetic contactor with a 110/120 V AC coil for motor switching

  • TypeIndustrial Electrical Controls & Automation
  • Handles 40 A inductive loads reliably
  • 120 V AC coil suits standard control circuits
  • Three-pole design switches three phases together
  • Screw terminals enable secure field wiring
  • Compact 4.31 in height fits tight panels

Industrial motor control

The Siemens 40EP32AF is a three-pole NEMA 1-3/4 magnetic contactor rated for 40 A inductive loads at 110/120 V AC. It suits panel builders and maintenance teams wiring motor starters, lighting banks or heating circuits in commercial and light-industrial plants. The non-reversing design fits straightforward on/off control schemes without added complexity.

Built-in auxiliary and expansion room

One normally-open auxiliary contact is included for status indication or interlocking, and the housing accepts up to eight auxiliary modules for expanded signalling. Screw terminals provide secure field wiring, while the surface-mount base allows direct attachment to panel backs or DIN rail adapters without extra brackets.

40 A inductive capacity with compact footprint

The contactor handles 40 A inductive and fits in a 4.25 in by 4.31 in envelope, leaving room in crowded enclosures. It is not rated for resistive full-load current, so engineers must verify heater or incandescent loads separately. Buyers needing reversing operation or higher pole counts must select a different model.

Highlights

  • Handles 40 A inductive loads reliably
  • 120 V AC coil suits standard control circuits
  • Three-pole design switches three phases together
  • Screw terminals enable secure field wiring
  • Compact 4.31 in height fits tight panels

Specifications

BrandSIEMENS
TypeIndustrial Electrical Controls & Automation

Questions about this item

How often do the auxiliary contacts on this 40A contactor need inspection or replacement?

The built-in 1NO auxiliary contact is rated for the same duty as the main poles; inspect it during routine panel maintenance and replace only if welding or excessive erosion appears.

What thermal limit stops this NEMA 1-3/4 contactor from running continuously at 40 A inductive load?

The 40 A inductive rating is the continuous thermal limit; sustained current above that value will trip the overload relay or cause coil overheating.

How much heat does the coil dissipate when energised at 120 VAC all day?

The 110/120 VAC coil draws only a few watts in sealed state, so heat rise inside the 4.31 × 4.25 in enclosure remains low during continuous operation.

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