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Siemens 4EM5318-4DB00 — Line/Load Reactors

Siemens SIDAC 4EM5318-4DB00 Smoothing Choke, 20A DC, 600V

MPN4EM5318-4DB00

Siemens SIDAC smoothing choke, 1-phase, 20A DC max, 600V, 12mH, IP00, screw/tab terminals.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

4EM5318-4DB00 specifications
ParameterValue
Type of voltageDC
Type of electrical connection for main current circuitscrew-type terminals / tab terminals
Operating voltage rated value600V
Power loss [W] of the coil48W
Power loss [W] of the iron core2W
Phase number1
Ambient temperature rated value40°C
Depth0.129m
Width0.151m
Height0.151m
Thermal class acc. to IEC 60085B
Rated value18A
Energy content2.4W
Protection class IPIP00
Inductivity rated value0.012H
Product function windings in parallel selectableNo

Product details

It operates at 600 V and provides 12 mH of inductance. The part is an open-frame design (IP00) with screw-type and tab terminals for the main circuit connection. Total power loss sums to 50 W — 48 W in the coil and 2 W in the iron core — at a rated ambient temperature of 40 °C. Thermal class B per IEC 60085 means the insulation system withstands a hot-spot temperature of 130 °C, so it handles sustained DC ripple without accelerated aging.

The 20 A maximum DC rating sets the absolute ceiling; the 18 A rated value is the continuous design point for a DC bus or DC-link application. At 12 mH, this choke smooths current ripple from a single-phase rectifier or DC supply feeding a drive or converter. The screw/tab terminals accept ring lugs or fork terminals; plan for a 0.129 m depth, 0.151 m width, and 0.151 m height footprint when laying out the panel.

Deployment context

This choke belongs in a DC power circuit — typically the DC link of a variable-frequency drive, a DC motor drive, or a battery charger. The 12 mH inductance and 20 A rating suit single-phase rectifier outputs where ripple reduction is needed to protect downstream capacitors or to meet conducted-emission limits. The screw/tab terminals simplify field wiring with standard crimp lugs.

Frequently asked questions

What is the 4EM5318-4DB00 used for?

It is a smoothing choke (DC-link reactor) for single-phase DC circuits, rated 20 A max, 600 V, 12 mH. It reduces current ripple from a rectifier or DC supply to protect downstream components and improve power quality.

Where can I buy the 4EM5318-4DB00?

This part is sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time.

What are the key specifications of the 4EM5318-4DB00?

1-phase, 20 A DC max, 18 A DC rated, 600 V operating voltage, 12 mH inductance, IP00, screw/tab terminals, 50 W total power loss at 40 °C ambient, thermal class B.

Does the 4EM5318-4DB00 require an enclosure?

Yes. The IP00 protection class means it has no built-in ingress protection. It must be mounted inside a panel or cabinet that provides the required environmental sealing.

MPN
4EM5318-4DB00