100-DNY42R

100-D Series IEC Contactor — 40A, 24V DC Electronic Coil, 3-Pole, 690V AC

The 100-DNY42R is a 40A three-phase IEC contactor from the 100-D series, rated for 690V AC and designed to switch motors up to 22 kW at 400V AC (30 hp at 480V AC). It uses a 24V DC coil with an integrated electronic control circuit that reduces sealed power consumption to around 1.5W after initial pull-in — significantly less than conventional AC coils. This cuts heat generation in the panel and extends coil life in continuous-duty installations.

The contactor accepts 100-D series add-on blocks for auxiliary contacts, mechanical interlocks, and surge suppressors. Built-in auxiliary contacts (1 NO + 1 NC) are included as standard. It conforms to IEC 60947-4-1 and is rated for both AC-3 and AC-4 duty cycles.

Key Specifications

Parameter	Value
Part Number	100-DNY42R
Rated Current (AC-3)	40 A
Rated Current (AC-4)	26 A
Max Motor Rating	22 kW @ 400V AC / 30 hp @ 480V AC
Rated Insulation Voltage	690V AC
Coil Voltage	24V DC (range: 20–28V DC)
Coil Type	Electronic low-power sealed
Main Contacts	3-pole, Normally Open
Auxiliary Contacts	1 NO + 1 NC (built-in)
Mechanical Life	10 million operations
Enclosure	IP20
Operating Temperature	−25°C to 60°C
Standards	IEC 60947-4-1, UL 508

Application Scenarios

Motor Starting in Automation Panels

Conveyor drives, pump starters, and fan motors at 22 kW and below are the everyday use case. The 24V DC coil interfaces directly with PLC relay or solid-state outputs without an intermediate relay, simplifying panel wiring and reducing component count.

Wye-Delta Motor Starting

The 100-DNY42R is commonly used in wye-delta starter configurations alongside a wye contactor and timer. Two units can be interlocked mechanically using the 100-KM12 interlock module to prevent simultaneous main and wye contact closure.

Reversing Starters

Paired with a mechanical interlock, two 100-DNY42R contactors form a reversing starter. The 'R' suffix references this pairing suitability. The interlock block mounts directly between the two contactors and prevents both from energizing simultaneously.

Process Industry Pump and Compressor Control

Water treatment, chemical dosing, and compressed air systems run continuous-duty motor loads where the low sealed power of the electronic coil reduces panel heat load over time. The 10 million cycle mechanical rating suits high-frequency switching in batch processes.

Installation Notes

DIN rail mounting: snap onto a 35 mm DIN rail. Screw-mount holes are provided for direct panel mounting using M4 fasteners.
Coil polarity: the 24V DC coil terminals are polarity-sensitive (A1+, A2−). Reversed polarity prevents operation — verify PLC output polarity before wiring.
Surge suppression: install a 100-FSC42 or equivalent suppressor across the coil terminals when driving from a PLC relay output. This reduces inductive kickback and protects relay contacts.
Auxiliary contacts: up to four 100-FA series add-on contact blocks can be stacked (front and side). Snap-on fit without tools; verify voltage and current ratings match the circuit.
Mechanical interlock: for reversing or wye-delta applications, fit the 100-KM12 mechanical interlock between the two contactors before panel installation — it cannot be added after wiring is complete.
Terminal torque: main terminals require 2.25–2.5 Nm. Undertightening causes overheating; overtightening damages the terminal block.

FAQ

Q: What is the difference between AC-3 and AC-4 current ratings?

AC-3 covers standard squirrel-cage motor duty: closing onto a running motor, opening under load. AC-4 is plugging and inching duty — closing and opening with the motor stalled or reversing. AC-4 is harder on contacts, hence the lower 26A rating versus 40A for AC-3.

Q: Why is the sealed power consumption so much lower than a standard contactor?

The electronic coil applies full voltage for initial pick-up, then automatically drops to a low holding current (~1.5W). Conventional AC coils draw higher power continuously. Less heat means tighter panel packing and longer coil service life.

Q: Can I use this contactor on a 48V DC control circuit?

No. The DNY variant is wound for 24V DC. Applying 48V to the coil will overheat and damage it. A different coil suffix is needed for 48V DC control.

Q: How many auxiliary contact blocks can be added?

Up to four 100-FA series blocks — two front-mounted and two side-mounted. Each adds up to 4 contacts, for a maximum of 16 additional auxiliary contacts beyond the built-in 1 NO + 1 NC.

Q: Is the 100-DNY42R suitable for hazardous locations?

The standard unit is rated IP20 open type and is not approved for hazardous classified locations as shipped. Mounting inside a certified explosion-proof or pressurized enclosure is required for such environments.

100-DNY42R New Factory Sealed Combination Output Module 100DNY42R